DE102024202975A1 - sorting system for metallurgical ash - Google Patents

Abstract

The present application relates to a metallurgical ash sorting system belonging to the field of metallurgical ash treatment, comprising a primary screening circuit for primary screening, a zinc sorting circuit for sorting zinc, a carbon sorting circuit for sorting carbon, an iron sorting circuit for sorting iron, a salt sorting circuit for sorting salt, a water supply circuit for supplying water, wherein the zinc sorting circuit is connected to the primary screening circuit, the carbon sorting circuit is connected to the zinc sorting circuit, the iron sorting circuit is connected to the carbon sorting circuit, and the salt sorting circuit is connected to the iron sorting circuit. This application enables the sorting of valuable elements in metallurgical ash.

Description

technical area

The present application relates to the field of metallurgical ash treatment, in particular to a sorting system for metallurgical ash.

State of the art

In the production process of steel industry, a large amount of suspended dust and by-products are generated, which become metallurgical ash and are recovered through a dust removal spraying process. The accumulation of metallurgical ash leads to environmental pollution. Therefore, the metallurgical ash must be processed.

At present, metallurgical ash is mainly processed by pyrometallurgy, which is usually divided into direct reduction method and smelting reduction method. The direct reduction method includes rotary kiln direct reduction method, rotary hearth furnace direct reduction method, cyclic fluidized bed direct reduction method. The smelting reduction method includes flame reactor reduction method, shaft furnace smelting reduction method, plasma reduction, etc. After being processed by pyrometallurgy, metallurgical ash can be recycled, thus reducing environmental pollution.

Pyrometallurgy for processing metallurgical ash is technologically mature, which does not easily pollute the environment and is therefore more environmentally friendly. However, it is difficult to separate the valuable elements from the metallurgical ash, which reduces the economic efficiency of processing metallurgical ash.

content of the invention

To sort out valuable elements in the metallurgical ash, a metallurgical ash sorting system is provided.

• einen Primärsiebkreislauf zum primären Sieben von der metallurgischen Asche, wobei der Primärsiebkreislauf einen ersten Vorratsbehälter, ein Silo, einen Schneckenförderer, einen Elevator, einen Brecher, ein Schwingsieb, eine erste Membranpumpe, eine Turmmühle und ein Hochfrequenzsieb umfasst, die sequentiell geschaltet sind,
• einen Zinksortierkreislauf zum Sortieren von Zinkschlamm aus einem Produkt des Primärsiebkreislaufs, wobei der Zinksortierkreislauf eine erste Schlammpumpe, einen ersten Zyklon, eine zweite Schlammpumpe, einen zweiten Zyklon, einen ersten Eindickbehälter, eine zweite Membranpumpe und eine erste Filtereinrichtung umfasst, die sequentiell geschaltet sind, wobei ein Einlass der ersten Schlammpumpe mit einem Auslass des Schwingsiebs verbunden ist, und wobei ein Einlass des ersten Eindickbehälters auch mit einem ersten automatischen Dosierer verbunden ist,
• einen Kohlenstoffsortierkreislauf zum Sortieren von Kohlenstoffpulver aus einem absinkenden Sand des ersten Zyklons, wobei der Kohlenstoffsortierkreislauf eine dritte Schlammpumpe, einen dritten Zyklon, eine Schlämmeinrichtung, eine erste Schwimmeinrichtung, eine zweite Schwimmeinrichtung, eine dritte Schwimmeinrichtung, einen ersten Schwerkraftabscheider, einen plattenförmigen Magnetabscheider, eine Kohlenstoffpulverpumpe, einen zweiten Vorratsbehälter, und eine zweite Filtereinrichtung umfasst, die sequentiell geschaltet sind, und
• wobei ein Einlass der dritten Schlammpumpe mit einem Auslass des ersten Zyklons verbunden ist, und wobei ein Einlass der ersten Schwimmeinrichtung auch mit einem zweiten automatischen Dosierer verbunden ist,
• einen Eisensortierkreislauf zum Sortieren von Eisenpulver aus einem Produkt der Schlämmeinrichtung, wobei der Eisensortierkreislauf eine Eisenpulverpumpe, einen zweiten Eindickbehälter, eine dritte Membranpumpe, eine Rührwerksmühle und eine dritte Filtereinrichtung umfasst, die sequentiell geschaltet sind, wobei ein Einlass der Eisenpulverpumpe mit einem Auslass der Schlämmeinrichtung verbunden ist, wobei ein Einlass der Rührwerksmühle auch mit einem Säuretank verbunden ist,
• einen Salzsortierkreislauf zum Sortieren von metallhaltigem Salz aus einem Produkt der dritte Filtereinrichtung, wobei der Salzsortierkreislauf einen Sammeltank und einen dreistufigen Eindämpfer umfasst, die sequentiell geschalted sind, wobei ein Einlass des Sammeltanks mit einem Auslass der dritten Filtereinrichtung verbunden ist,
• einen Wasserversorgungskreislauf, der dazu ausgebildet ist, die Schlämmeinrichtung, die erste Schwimmeinrichtung, die zweite Schwimmeinrichtung, die dritte Schwimmeinrichtung und den ersten Schwerkraftabscheider mit Wasser zu versorgen, und ein Überlaufwasser aufzufangen, das jeweils aus einer Oberseite des ersten Eindickbehälters und einer Oberseite des zweiten Eindickbehälters austritt, wobei der Wasserversorgungskreislauf eine Wasserspeichereinrichtung umfasst, deren Einlass mit nicht nur einem Überlaufloch des ersten Eindickbehälters, sonder auch einem Überlaufloch des zweiten Eindickbehälters verbunden ist, während ein Auslass der Wasserspeichereinrichtung über eine erste Wasserpumpe mit einem Einlass der Schlämmeinrichtung, dem Einlass der ersten Schwimmeinrichtung, einem Einlass der zweiten Schwimmeinrichtung, einem Einlass der dritten Schwimmeinrichtung und einem Einlass des ersten Schwerkraftabscheiders verbunden ist.

The metallurgical ash sorting system includes:

• a primary screening circuit for primary screening of the metallurgical ash, the primary screening circuit comprising a first storage container, a silo, a screw conveyor, an elevator, a crusher, a vibrating screen, a first diaphragm pump, a tower mill and a high frequency screen, which are connected sequentially,
• a zinc sorting circuit for sorting zinc sludge from a product of the primary screening circuit, the zinc sorting circuit comprising a first sludge pump, a first cyclone, a second sludge pump, a second cyclone, a first thickening tank, a second diaphragm pump and a first filter device which are connected sequentially, an inlet of the first sludge pump being connected to an outlet of the vibrating screen, and an inlet of the first thickening tank also being connected to a first automatic doser,
• a carbon sorting circuit for sorting carbon powder from a sinking sand of the first cyclone, the carbon sorting circuit comprising a third slurry pump, a third cyclone, a slurrying device, a first floating device, a second floating device, a third floating device, a first gravity separator, a plate-shaped magnetic separator, a carbon powder pump, a second storage container, and a second filter device, which are connected sequentially, and
• wherein an inlet of the third sludge pump is connected to an outlet of the first cyclone, and wherein an inlet of the first floating device is also connected to a second automatic dosing device,
• an iron sorting circuit for sorting iron powder from a product of the slurrying device, the iron sorting circuit comprising an iron powder pump, a second thickening tank, a third diaphragm pump, an agitator mill and a third filter device which are connected sequentially, an inlet of the iron powder pump being connected to an outlet of the slurrying device, an inlet of the agitator mill also being connected to an acid tank,
• a salt sorting circuit for sorting metal-containing salt from a product of the third filter device, the salt sorting circuit comprising a collection tank and a three-stage evaporator which are connected sequentially, an inlet of the collection tank being connected to an outlet of the third filter device,
• a water supply circuit configured to supply water to the slurrying device, the first floating device, the second floating device, the third floating device and the first gravity separator, and to collect an overflow water exiting from a top of the first thickening tank and a top of the second thickening tank, respectively, wherein the water supply circuit comprises a water storage device, the inlet of which is connected to not only an overflow hole of the first thickening tank but also an overflow hole of the second thickening tank, while an outlet of the water storage device is connected via a first water pump to an inlet of the slurrying device, the inlet of the first floating device, an inlet of the second floating device, an inlet of the third floating device and an inlet of the first gravity separator.

In this way, the metallurgical ash is transported through the primary screening circuit, stirred, crushed and vibrated and sorted twice to conduct pretreatment of the metallurgical ash and prepare it for subsequent sorting. Then, the metallurgical ash after vibrating screening is subjected to two-stage swirling for separation, concentration and filtering by the zinc sorting circuit to sort out zinc sludge. The sinking sand from the first cyclone is subjected to three-stage flotation, gravity separation, magnetic separation and filtration by the carbon sorting circuit to sort out carbon powder. The product of the slurrying device is concentrated, stirred, ground and filtered by the iron sorting circuit to sort out iron powder. The product of the third filtering device is collected and evaporated by the salt sorting circuit to sort out metal-containing salts, so that the valuable elements in the metallurgical ash can be easily recovered. The overflow water is collected by the water storage facility and water for scarfing, flotation and gravity separators is replenished so that the water can be easily reused in the sorting system.

Optionally, the carbon sorting circuit is formed with a first carbon-iron sorting branch and a second carbon-iron sorting branch, wherein both the first carbon-iron sorting branch and the second carbon-iron sorting branch are designed to also sort out iron from a product of the carbon sorting, wherein the first carbon-iron sorting branch comprises a fourth slurry pump, a fourth cyclone and a second gravity separator which are connected sequentially, wherein an inlet of the fourth slurry pump is connected to an outlet of the first floating device, wherein an outlet of the second gravity separator is connected to the inlet of the iron powder pump, and wherein the second carbon-iron sorting branch is formed by connecting an outlet of the first gravity separator to the inlet of the iron powder pump.

In this way, a first carbon-iron sorting branch and a second carbon-iron sorting branch are provided on the carbon sorting circuit, which facilitates the further sorting of iron powder during the carbon powder sorting process and improves the proportion of sorted iron powder. The waste products of carbon powder sorting are also recycled.

Optionally, a water and salt complementation circuit is provided in the water supply circuit, the water and salt complementation circuit comprising a concentrated salt vessel and a distilled water vessel, an inlet of the concentrated salt vessel being connected to the outlet of the water storage device, an outlet of the concentrated salt vessel being connected to an inlet of the three-stage evaporator, while an inlet of the distilled water vessel is connected to an outlet of the three-stage evaporator, and the outlet of the distilled water vessel being connected to an inlet of the water storage device via a second water pump.

Due to the above-mentioned design, the water storage facility is additionally supplied with water through the water-salt complementary circuit. The amount of water from the external source of water supply for the sorting system is thus reduced and the proportion of sorted salt is increased.

• eine Wasservorlage zum Auffangen und Filtern des Überlaufwassers aus dem ersten Eindickbehälter und dem zweiten Eindickbehälter,
• einen Wasserversorgungstank, der mit der Wasservorlage kommuniziert ist, und der dazu ausgebildet ist, ein Salzwasser, das über die Wasservorlage gefiltert ist, zu konzentrieren,
• einen Tank für konzentriertes Salz, der mit dem Wasserversorgungstank kommuniziert ist, und
• der dazu ausgebildet, das Salzwasser, das über den Wasserversorgungstank konzentriert ist, zu lagern,
• eine Wasserversorgungsleitung, die durch eine dritte Wasserpumpe mit dem Wasserversorgungstank kommuniziert ist, und die dazu ausgebildet ist, die Schlämmeinrichtung, die erste Schwimmeinrichtung, die zweite Schwimmeinrichtung, die dritte Schwimmeinrichtung, den ersten Schwerkraftabscheider und den zweiten Schwerkraftabscheider mit Wasser zu versorgen,
• einen Tank für destilliertes Wasser zum Aufangen Wasser des Gefäßes für destilliertes Wasser, der mit einer Seitenwand der Wasserversorgungsleitung kommuniziert ist.

Optionally, the water storage facility includes:

• a water reservoir for collecting and filtering the overflow water from the first thickening tank and the second thickening tank,
• a water supply tank which is in communication with the water reservoir and which is designed to concentrate a salt water which is filtered through the water reservoir,
• a concentrated salt tank communicating with the water supply tank, and
• which is designed to store the salt water concentrated via the water supply tank,
• a water supply line which is communicated with the water supply tank through a third water pump and which is designed to supply the slurry device, the first floating device, the second floating device, the third floating device, the first gravity separator and the second to supply gravity separators with water,
• a distilled water tank for collecting water from the distilled water vessel and communicating with a side wall of the water supply line.

Due to the above configuration, the overflow water of the first thickening tank and the second thickening tank is absorbed and filtered by the water reservoir, so that the water in the sorting system is easily reused by the water storage device. The quality of water supply for the sorting system from the water storage device is improved by the salt water concentrated and filtered by the water supply tank, and the concentration of the salt water supplied to the concentrated salt vessel is increased. The distilled water is absorbed by the distilled water tank and directly fed into the water supply pipe, so that the distilled water can be reused, and the water supply quality of the water storage device can be further improved.

Optionally, a filter screen for intercepting foreign matter in the overflow water, a filter plate with a recess for filtering, the lower end of which is open, and an atomizer disc are vertically mounted one after the other in the water reservoir, wherein a filter unit designed to filter sand grains and dust is mounted in the recess for filtering, and wherein the atomizer disc is mounted at a lower end of the water reservoir, and wherein the lower end of the water reservoir is connected to an upper end of the water supply tank via a pipe.

Due to the above design, the overflow water flows into the water reservoir, the filter screen filters and catches the impurities carried in the overflow water, so that the impurities are less likely to flow back into the sorting system. The overflow water flowing through the filter screen flows from the filter unit through the filter plate, and the sand and dust in the overflow water are further filtered out by the filter unit, which improves the quality of the overflow water. The overflow water flowing through the filter plate is atomized by the atomizer disc, so that the filtered overflow water enters the water supply tank in the form of water mist, whereby the overflow water can be filtered and purified, and thus the water quality of the water supply from the water storage facility to the sorting system can be improved.

Optionally, a lower end of the filter recess is provided with a closure plate, wherein a closing spring is firmly connected between the closure plate and the filter recess, which is designed to close a lower end of the filter recess with the closure plate, wherein the filter unit comprises a filter box in the filter recess and a honeycomb-shaped filter ball in the filter box, and wherein a plurality of guide tubes are connected in a tangential direction to a side wall at an upper end of the filter box, while a plurality of water outlet openings are formed on the side wall at a lower end thereof, and wherein more than two locking lugs are firmly connected to the lower end of the filter box, which are located between the filter recess and the closure plate, wherein the filter recess is formed with more than two guides, each of which is assigned to one of the locking lugs and each is adapted to one of the locking lugs, wherein the guides are designed so that the locking lugs can slide out of the lower end of the filter recess.

Due to the above design, the overflow water on the filter plate flows into the filter box via the guide pipe. Since the overflow water flows into the filter box in the tangential direction of the filter box, a vortex is formed in the overflow water flowing into the filter box via a plurality of guide pipes. The vortex causes sand and dust to collect in the center of the filter box and causes the filter ball to rotate. Sand and dust can be easily filtered and removed by the collecting effect of the vortex and the suction effect of the honeycomb filter ball.

According to the invention, since the density of the blocking plate is smaller than the density of salt water, when the level of salt water in the water supply tank continuously rises, the blocking plate can float up with the level of salt water until the blocking plate blocks the communication point between the water supply tank and the water reservoir. Then, the reverse osmosis membrane frame is pushed by the drive cylinder to slide. The reverse osmosis membrane frame concentrates the salt water under pressure and filters the salt water with its own reverse osmosis membrane, thereby increasing the concentration of salt water and the fresh water content of the water supply of the water supply tank, thus facilitating the recovery of salts from the salt water and improving the water quality of the water supply of the water storage facility.

According to the invention, the reverse osmosis membrane frame can rotate the push rod during movement. The push rod rotates the liquid outlet plate and enables the elasticity of the closure spring to be built up. When the liquid outlet plate is opened, the concentrated salt water can be discharged into the concentrated salt tank through the reverse osmosis membrane during the concentration process, so that the concentrated salt water can be easily and automatically discharged. When the reverse osmosis membrane frame moves in reverse, the closure spring with the elastic force can drive the liquid outlet plate to automatically close the liquid outlet port.

According to the invention, the fresh water that has entered the water supply tank is sucked out by the water pump so that the fresh water is pressurized and flows into the water supply pipe. The pressurized fresh water impacts the sliding plate and rotates the sliding plate. The sliding plate pushes the double-sided rack over the first gear so that the double-sided rack rotates the second gear, and the second gear rotates the water outlet plate so that the distilled water in the distilled water tank can be mixed with the fresh water and also can be supplied with water to the sorting system, thereby automatically adding the distilled water in the distilled water tank easily when supplying fresh water.

According to the invention, when the level of distilled water in the distilled water tank is lower than the set position, the limiting rack slides toward the first gear together with the leveling plate. The limiting rack is engaged with the first gear to make it difficult for the first gear to rotate, so that the pressurized fresh water is difficult to rotate the slide plate and the distilled water tank cannot be opened. When the level of distilled water in the distilled water tank is not lower than the set position, the leveling plate floats up due to the buoyancy of the distilled water, thereby decoupled from the limiting rack from the first gear, so that the pressurized fresh water is easy to rotate the slide plate, and the opening of the water outlet plate can be easily controlled automatically according to the level of distilled water.

1. 1. Nach der Sortierung im Primärsiebkreislauf können die wertvollen Elemente in der metallurgischen Asche über den Zinksortierkreislauf, den Kohlenstoffsortierkreislauf, den Eisensortierkreislauf und den Salzsortierkreislauf aussortiert und zurückgewonnen werden.
2. 2. Durch den Wasserversorgungskreislauf und den Wasser-Salz-Komplementärkreislauf ist das Nachfüllen des Wassers in das Sortiersystem erleichter, damit das wasser wieder verwendet werden kann.
3. 3. Das Überlaufwasser wird durch das Filtersieb, die Filtereinheit und die Zerstäuberscheibe gefiltert und gereinigt, damit die Wasserqualität der Wasserversorgung verbessert wird, die dem Sortiersystem von der Wasserspeichereinrichtung zugeführt wird.
4. 4. Das Salzwasser wird durch die Umkehrosmosemembran konzentriert, was die Rückgewinnungseffizienz des Salzwassers verbessert und somit die Wasserqualität der Wasserversorgung der Wasserspeichereinrichtung verbessert.

In summary, at least one of the following advantageous technical effects can be achieved

1. 1. After sorting in the primary screening circuit, the valuable elements in the metallurgical ash can be sorted out and recovered through the zinc sorting circuit, the carbon sorting circuit, the iron sorting circuit and the salt sorting circuit.
2. 2. The water supply circuit and the water-salt complementary circuit make it easier to refill the water into the sorting system so that the water can be reused.
3. 3. The overflow water is filtered and purified by the filter screen, filter unit and atomizer disc to improve the water quality of the water supply supplied to the sorting system from the water storage facility.
4. 4. The salt water is concentrated by the reverse osmosis membrane, which improves the recovery efficiency of the salt water and thus improves the water quality of the water supply of the water storage facility.

Description of the drawings

• 1 shows a schematic view of the sorting system according to an embodiment of the present application;
• 2 is a schematic view showing the structure of the water storage device;
• 3 shows a sectional view showing the internal structure of the water reservoir;
• 4 shows an exploded view of the filter unit;
• 5 shows a sectional view showing the internal structure of the water supply tank;
• 6 shows a sectional view of the communication point between the distilled water box and the water supply line; and
• 7 schematically shows a structural view showing the positions of the first gear and the second gear.

Detailed embodiments

The present application is described below with reference to 1-7 described in more detail.

An embodiment of the present application discloses a sorting system for metallurgical ash. As in 1 As shown, a metallurgical ash sorting system comprises a primary screening circuit for primary screening of metallurgical ash, a zinc sorting circuit for sorting zinc sludge from the product of the primary screening circuit, a carbon sorting circuit for sorting carbon powder from the zinc sorting circuit, an iron sorting circuit for sorting iron powder from the carbon sorting circuit, a salt sorting circuit for sorting metal-containing salt from the product of the iron sorting circuit, a water supply circuit for supplying water, and a return circuit for returning intermediate products.

In use, the metallurgical ash is primarily processed and screened by the primary screening circuit. The primarily screened product is screened by the zinc sorting circuit to recover zinc. The intermediate product of the zinc sorting circuit enters the carbon sorting circuit, which sorts out carbon. The intermediate product of the carbon sorting circuit enters the iron sorting circuit, which sorts out iron. The intermediate product of the iron sorting circuit enters the salt sorting circuit, which sorts out metal-containing salt. The replenishment circuit is refilled with water by the water supply circuit, and the return circuit ensures that the intermediate product of the carbon sorting circuit is returned for further sorting. In this way, zinc, carbon, iron, valuable elements of metal-containing salt can be sorted out from the metallurgical ash by the sorting system.

As in 1 As shown, the primary screening circuit comprises a first storage container, a silo, a screw conveyor, an elevator, a crusher, a vibrating screen, a first diaphragm pump, a tower mill and a high frequency screen, which are connected sequentially. The primary screening circuit is provided with a primary screening branch. The primary screening branch is formed by connecting the outlet of the high frequency screen to the inlet of the first diaphragm pump.

The zinc sorting circuit comprises a first slurry pump, a first cyclone, a second slurry pump, a second cyclone, a first thickening tank, a second diaphragm pump and a first filter device, which are connected sequentially. The inlet of the first slurry pump is connected to the outlet of the vibrating screen and the inlet of the first thickening tank is also connected to a first automatic doser.

The zinc sorting circuit is provided with a first zinc sorting branch and a second zinc sorting branch. The first zinc sorting branch is formed by connecting the outlet of the second cyclone to the inlet of the first sludge pump. The second zinc sorting branch is formed by connecting the outlet of the first filter device to the inlet of the second sludge pump.

The carbon sorting circuit includes a third slurry pump, a third cyclone, a slurrying device, a first floating device, a second floating device, a third floating device, a first gravity separator, a plate-shaped magnetic separator, a carbon powder pump, a second storage tank and a second filter device, which are connected sequentially. The inlet of the third slurry pump is connected to the outlet of the first cyclone, and the inlet of the first floating device is also connected to a second automatic doser.

The carbon sorting circuit is provided with a carbon sorting branch, a first carbon-iron sorting branch and a second carbon-iron sorting branch. The carbon sorting branch is formed by connecting the outlet of the second filter device to the inlet of the second sludge pump.

Both the first carbon-iron sorting branch and the second carbon-iron sorting branch are designed to also sort out iron from the product of carbon sorting. The carbon-iron sorting branch comprises a fourth slurry pump, a fourth cyclone and a second gravity separator connected sequentially. The inlet of the fourth slurry pump is connected to the outlet of the first float device, and the outlet of the second gravity separator is connected to the inlet of the iron powder pump. The second carbon-iron sorting branch is formed by connecting the outlet of the gravity separator to the inlet of the iron powder pump.

The iron sorting circuit includes an iron powder pump, a second thickening tank, a third diaphragm pump, an agitator mill and a third filter device, which are connected sequentially. The inlet of the iron powder pump is connected to the outlet of the slurry device. The inlet of the agitator mill is also connected to an acid tank. The iron sorting circuit is provided with an iron sorting branch. The iron sorting branch is formed by connecting the outlet of the third filter device to the inlet of the iron powder pump.

The salt sorting circuit comprises a collection tank and a three-stage evaporator, which are connected sequentially. The inlet of the collection tank is connected to the outlet of the third filter device.

The water supply circuit includes a water storage device. The inlet of the water storage device is connected to the overflow hole the first thickening tank and the second thickening tank. The outlet of the water storage device is connected via a water pump to the inlet of the slurry device, the first floating device, the second floating device, the third floating device, the first gravity separator and the second gravity separator.

In the water supply circuit, a water and salt complementation circuit is provided, the water and salt complementation circuit comprising a concentrated salt vessel and a distilled water vessel, the inlet of the concentrated salt vessel being connected to the outlet of the water storage device, and the outlet of the concentrated salt vessel being connected to the inlet of the three-stage evaporator, and the inlet of the distilled water vessel being connected to the outlet of the three-stage evaporator, and the outlet of the distilled water vessel being connected to the inlet of the water storage device via a water pump.

The reflux circuit is formed by connecting the outlet of the third cyclone, the fourth cyclone, the second floating device, the third floating device, the first gravity separator, the second gravity separator and the plate-shaped magnetic separator to the inlet of the first sludge pump.

In operation, the metallurgical ash is primarily screened by the first storage bin, silo, screw conveyor, elevator, crusher, vibrating screen, first diaphragm pump, tower mill and high frequency screen to achieve two-stage screening, while the goods on the high frequency screen flow back to the first diaphragm pump to facilitate the subsequent sorting of the metallurgical ash. The goods under the high frequency screen are passed through the first slurry pump, first cyclone, second slurry pump, second cyclone, first thickening tank, second diaphragm pump and first filter device to sort out the zinc sludge. When sorting the zinc sludge, the product of the second cyclone is returned to the first sludge pump for repeated sorting, and the product of the first filter device is returned to the second sludge pump for repeated sorting, so that the sorting of the zinc sludge is refined. The product of the first slurry pump is fed through the third slurry pump, the third cyclone, the slurrying device, the first floating device, the second floating device, the third floating device, the first gravity separator, the plate-shaped magnetic separator, the carbon powder pump, the second storage tank and the second filter device to sort out the carbon powder. In the carbon sorting process, the intermediate products are recycled to increase the sorted carbon powder proportion. The product of the slurrying device is fed through the iron powder pump, the second thickening tank, the third diaphragm pump, the agitator mill and the third filter device to sort out the iron powder, the iron powder pump is fed through the first gravity separator and the first floating device to further increase the sorted iron powder proportion. The product of the third filter device is fed through the collection tank and the three-stage evaporator to sort out the salts containing metal elements such as potassium, sodium and zinc salts. The slurrying device, the first floating device, the second floating device, the third floating device, the first gravity separator and the second gravity separator are supplied with water from the water storage device, and the overflow water from the first thickening tank and the second thickening tank is collected in the water storage device. At the same time, the water is recycled by means of the concentrated salt vessel and the distilled water vessel, so that the separation of the valuable elements from the metallurgical ash is facilitated.

As in 2 As shown, the water storage device comprises a water reservoir 1, a water supply tank 3, a concentrated salt tank 4, a distilled water tank 5 and a water supply line 6. The water reservoir 1 is in communication with the water supply tank 3. The water supply tank 3 is in communication with the concentrated salt tank 4 and is in communication with the water supply line 6 via a water pump. The water supply line 6 is in communication with the distilled water tank 5.

As in 3 As shown, the water reservoir 1 is designed as a rectangular box and is oriented vertically. The water reservoir 1 is open at the top. A filter screen 11, a filter plate 12 and an atomizer disk 13 are attached vertically one after the other in the water reservoir 1. The filter screen 11 is adapted to the water reservoir 1 and is located at the upper part of the water reservoir 1. The filter plate 12 is adapted to the water reservoir 1 and is located in the middle of the water reservoir 1. Several atomizer disks 13 are provided and are located at the lower end of the water reservoir 1.

As in 3 and 4 As shown, the filter plate 12 is provided with a plurality of recesses for filtering 121, each of which is associated with an atomizer disk 13. The filter recess 121 is designed as an inverted cone, the lower end of which is open. The lower end of the filter recess 121 is covered with a horizontal closure plate 122. Between the closure plate 122 and the outer wall of the filter recess 121, a plurality of closing springs 123 are firmly connected. The plurality of closing springs 123 are arranged around the axis of the filter recess 121. The closing spring 123 is designed to close the lower end of the filter recess 121 with the closure plate 122.

As in 4 , a filter unit 2 is mounted in the filtering recess 121. The filter unit 2 includes a filter box 21 located in the filtering recess 121 and fitted to the filtering recess 121, and a filter ball 22 in the filter box 21. A plurality of circular guide pipes 211 are connected to the upper end of the filter box 21, while a plurality of rectangular water outlet openings 212 are formed on the side wall at the lower end thereof. The plurality of guide pipes 211 and the plurality of water outlet openings 212 are evenly distributed around the axis of the filter box 21. The axial direction of the guide pipe 211 is the tangential direction of the filter box 21. The filter ball 22 is spherical and honeycomb-shaped. The filter ball 22 is inserted in the filter box 21, and its density is smaller than the density of the overflow water.

Two locking lugs 213 are firmly connected to the outer wall at the lower end of the filter box 21. The two locking lugs 213 are located on both sides of the filter box 21. The locking lugs 213 are each designed as a rectangular block and are located between the lower end of the filter recess 121 and the closure plate 122, with the locking lugs 213 each lying closely against the closure plate 122 and the filter recess 121. On the inner wall at the lower end of the filter recess 121, two guides 124 are formed, each of which is assigned to a locking lug 213 and is each adapted to a locking lug 213. The guide 124 is designed so that the locking lug 213 can slide over the lower end of the filter recess 121.

During operation, a plurality of atomizer disks 13 are activated to direct the overflow water from the first thickening tank and the second thickening tank into the water reservoir 1, wherein the overflow water is filtered and intercepted by the filter sieve 11. The overflow water flows onto the filter plate 12 and flows into the filter box 21 via the guide pipe 211. The overflow water flows in a vortex shape in the filter box 21 and sets the filter ball 22 in rotation. The grains of sand and dirt are sucked out of the overflow water by the filter ball 22. The overflow water, from which the grains of sand and dirt have been sucked out, flows onto the atomizer disk 13 via the water outlet openings 212 at the lower end of the filter box 21. The overflow water can be atomized by means of the atomizer disk 13, so that the overflow water is easily cleaned, and is thus easily filtered and cleaned in the water reservoir 1.

As in 2 and 3 As shown, the center of the water reservoir 1 is connected via a rectangular pipe to the side at the upper end of the water supply tank 3 close to the water reservoir 1. The communication point between the water reservoir 1 and the pipe is below the filter plate 12.

As in 1 and 5 As shown, a blocking plate 33 is hinged at the communication point between the pipe and the water supply tank 3. The blocking plate 33 is rectangular and has a density lower than that of salt water. The hinge point of the blocking plate 33 is located on the side of the blocking plate 33 away from the water seal 1. The side of the blocking plate 33 close to the water seal 1 is erected at the communication point between the pipe and the water supply tank 3.

As in 5 As shown, a rectangular reverse osmosis membrane frame 31 is slidably disposed in the water supply tank 3. The reverse osmosis membrane frame 31 is vertically aligned and fitted to the longitudinal section of the water supply tank 3. The sliding direction of the reverse osmosis membrane frame 31 is toward or away from the blocking plate 33. The reverse osmosis membrane on the reverse osmosis membrane frame 31 is designed to concentrate the salt water.

On the side of the reverse osmosis membrane frame 31 remote from the locking plate 33, four drive cylinders 32 are provided. The four drive cylinders 32 are each arranged at one of four corners of the reverse osmosis membrane frame 31. The drive cylinders 32 are fixedly connected to the water supply tank 3, with the movable end of the drive cylinder slidably extending through the side wall of the water supply tank 3. The retraction and extension direction of the drive cylinder 32 is the same as the displacement direction of the reverse osmosis membrane frame 31, with the movable end of the drive cylinder being fixedly connected to the reverse osmosis membrane frame 31. The lower end of the water supply tank 3 is provided with a rectangular liquid outlet port 34 on the side near the blocking plate 33. The liquid outlet port 34 penetrates the lower end of the water supply tank 3. Inside the liquid outlet port 34, a liquid outlet plate 35 is provided which is fitted to the liquid outlet port. The liquid outlet plate 35 is arranged horizontally, the side of which near the reverse osmosis membrane frame 31 is hinged to the water supply tank 3.

A push rod 351 is fixedly connected to the upper end of the liquid outlet plate 35 on the side near the reverse osmosis membrane frame 31. The push rod 351 is formed as a rectangular rod and is inclined upward toward the reverse osmosis membrane frame 31. The push rod 351 is located on a long side of the water supply tank 3. A closing spring 352 is fixedly connected between the lower end of the liquid outlet plate 35 and the outer wall of the water supply tank 3. The closing spring 352 is designed to close the liquid outlet port 34 with the liquid outlet plate 35. The concentrated salt tank 4 is located below the water supply tank 3, with the inlet of the concentrated salt tank facing the liquid outlet port 34.

In operation, the atomized and purified overflow water is formed into the salt water. The atomized salt water flows into the water supply tank 3. The level of the salt water in the water supply tank 3 gradually rises to make the blocking plate 33 float up through the salt water until the pipe connecting the water reservoir 1 and the water supply tank 3 is closed by the blocking plate 33. The drive cylinder 32 is started to move the reverse osmosis membrane frame 31 toward the blocking plate 33. The salt water is concentrated on the reverse osmosis membrane frame 31 through the reverse osmosis membrane until the reverse osmosis membrane frame 31 reaches the push rod 351. The reverse osmosis membrane frame 31 pushes the push rod 351 to rotate, so that the push rod 351 pushes the liquid outlet plate 35 to rotate, so that the elastic force of the closure spring 352 is built up. The concentrated salt water flows into the concentrated salt tank 4 via the liquid outlet port 34, so that the concentration of the salt water is achieved. When the concentrated salt water flows out, the reverse osmosis membrane frame 31 is reset by the drive cylinder 32, and the liquid outlet port 34 is closed by the liquid outlet plate 35 due to the elastic force of the closure spring 352, so that the salt water accumulates again to concentrate the salt water.

As in 2 As shown, the water supply pipe 6 is formed as a rectangular pipe and arranged horizontally. The distilled water tank 5 is located above the water supply pipe 6 and is formed as a rectangular tank. The lower end of the distilled water tank 5 tapers and is connected to the upper end of the water supply pipe 6.

As in 2 and 6 , a water outlet plate 51 is provided at the lower end of the distilled water tank 5. The water outlet plate 51 is formed as a rectangular plate and fitted to the lower end of the distilled water tank 5. The water outlet plate 51 is arranged horizontally and is hinged to the distilled water tank 5 at its side remote from the water supply tank 3.

As in 6 and 7 As shown, the water outlet plate 51 is fixedly connected to a first gear 511 via a universal joint shaft. The first gear 511 is located outside the distilled water tank 5 and is arranged coaxially with the universal joint shaft of the water outlet plate 51.

As in 2 and 6 As shown, at the communication point between the distilled water tank 5 and the water supply pipe 6, a sliding plate 52 is hinged on its side close to the water supply tank 3. The sliding plate 52 is formed as a rectangular plate and is arranged vertically. The sliding plate 52 is located below the water outlet plate 51.

As in 6 and 7 As shown, the sliding plate 52 is fixedly connected to a second gear 521 via a universal joint shaft. The second gear 521 is located outside the distilled water tank 5 and on the same side of the distilled water tank 5 as the first gear 511.

As in 2 and 7 As shown, a double-sided rack 53 is arranged between the first gear 511 and the second gear 521, which is engaged with the first gear and the second gear. The double-sided rack 53 is slidably connected to the distilled water tank 5 toward or away from the water supply tank 3. A return spring 531 is attached between one side of the double-sided rack 53 close to the first gear 511 and the distilled water tank 5. The return spring 531 is adapted to move the double-sided rack 53. rack 53 so that the lower end of the water supply tank 3 is closed by the water outlet plate 51.

As in 6 and 7 , a leveling plate 54 is provided in the distilled water tank 5. The density of the leveling plate 54 is smaller than the density of the distilled water. The top of the leveling plate 54 is connected to the outer wall of the distilled water tank 5 near the first gear 511 via a rod assembly so as to be slidable in the vertical direction. The end of the rod assembly remote from the leveling plate 54 is fixedly connected to a limiting rack 55. The limiting rack 55 is arranged horizontally and its longitudinal direction is the same as that of the double-sided rack 53. When the level of the distilled water in the distilled water tank 5 is lower than a set position, the limiting rack 55 and the first gear 511 are engaged.

As in 6 As shown, the bottom surface of the leveling plate 54 is fixedly connected to the limit rod 541. The limit rod 541 is circular rod-shaped and is inclined downward toward the second gear 521. When the water outlet plate 51 is in an open state and the level of the distilled water is lower than the set position, the limit rod 541 abuts against the water outlet plate 51 so that the limit rack 55 is spaced from the first gear 511.

In operation, the distilled water in the distilled water vessel flows into the distilled water tank 5. The water pump is started so that the concentrated fresh water in the water supply tank 3 is pumped into the water supply pipe 6 under pressure. The fresh water impacts the sliding plate 52 to cause the first gear 511 of the sliding plate 52 to rotate. The first gear 511 drives the double-sided rack 53 to slide, so that the double-sided rack 53 drives the second gear 521 to rotate, and so that the second gear 521 causes the water outlet plate 51 to rotate. In this way, the distilled water in the distilled water tank 5 flows into the water supply pipe 6, thereby realizing the recycling of distilled water and improving the quality of water supply from the water storage facility.

When the level of the distilled water in the distilled water tank 5 is below the set position, the leveling plate 54 causes the limiting rack 55 to slide downward, whereby the limiting rack 55 is engaged with the first gear 511, so that it is difficult to open the water outlet plate 51 when the level of the distilled water in the distilled water tank 5 is below the set position.

The operation of the metallurgical ash sorting system in the embodiment of the application is described as follows. In operation, the metallurgical ash is primarily screened by the primary screening circuit. The zinc sludge is sorted out from the product from the primary screening circuit in the zinc sorting circuit. The carbon powder is sorted out from the zinc sorting circuit in the carbon sorting circuit. The iron powder is sorted out from the carbon sorting circuit in the iron sorting circuit. Metal-containing salts are sorted out from the iron sorting circuit in the salt sorting circuit. In this way, valuable elements are sorted out from the metallurgical ash, which improves the reusability of the metallurgical ash.

The water reservoir 1 of the water storage device collects the overflow water of the sorting system which is filtered and purified by the filter screen 11, the filter unit 2 and the atomizer disk 13. The distilled water tank 5 collects the distilled water from the distilled water vessel. The salt water is concentrated in the water supply tank 3 via the reverse osmosis membrane frame 31, whereby the concentrated salt water flows into the concentrated salt tank 4, thereby improving the concentration efficiency of the salt water and the quality of the water supply for the sorting system. The fresh water in the water supply tank 3 is pumped into the sorting system by the water pump via the water supply pipe 6. The fresh water impacts on the sliding plate 52, so that the sliding plate 52 opens the water outlet plate 51 via the second gear 521, the double-sided rack 53 and the first gear 511, so that the fresh water can be mixed with distilled water when supplied, thereby further improving the quality of water supply for the sorting system, and in turn further improving the quality of water supply for the sorting system by the water storage device when recycling water.

The foregoing descriptions represent the preferred embodiments of the application and are not intended to limit the scope of the application, so that all equivalent changes made based on the structure, form and principle of the present application will fall within the scope of the present application.

list of reference symbols

1

water supply

11

filter sieve

12

filter plate

121

recess for filtering

122

closure plate

123

closing spring

124

backdrop

13

atomizer disc

2

filter unit

21

filter box

211

guide tube

212

water outlet opening

213

locking lug

22

filter ball

3

water supply tank

31

frame for reverse osmosis membrane

32

drive cylinder

33

locking plate

34

liquid outlet opening

35

liquid outlet plate

351

push rod

352

locking spring

4

tank for concentrated salt

5

tank for distilled water

51

water outlet plate

511

first gear

52

sliding plate

521

second gear

53

double-sided rack

531

return spring

54

leveling plate

541

limiting bar

55

limit rack

6

water supply line

Claims (5)

A sorting system for metallurgical ash, characterized in that the sorting system for metallurgical ash comprises: a primary screening circuit for primary screening of the metallurgical ash, wherein the primary screening circuit comprises a first storage container, a silo, a screw conveyor, an elevator, a crusher, a vibrating screen, a first diaphragm pump, a tower mill and a high frequency screen, which are connected sequentially, a zinc sorting circuit for sorting zinc sludge from a product of the primary screening circuit, wherein the zinc sorting circuit comprises a first sludge pump, a first cyclone, a second sludge pump, a second cyclone, a first thickening tank, a second diaphragm pump and a first filter device, which are connected sequentially, and wherein an inlet of the first sludge pump is connected to an outlet of the vibrating screen, and wherein an inlet of the first thickening tank is also connected to a first automatic doser, a carbon sorting circuit for sorting carbon powder from a sinking sand of the first cyclone, wherein the Carbon sorting circuit comprising a third sludge pump, a third cyclone, a slurrying device, a first floating device, a second floating device, a third floating device, a first gravity separator, a plate-shaped magnetic separator, a carbon powder pump, a second storage container, and a second filter device, which are connected sequentially, wherein an inlet of the third sludge pump is connected to an outlet of the first cyclone, and wherein an inlet of the first floating device is also connected to a second automatic doser, an iron sorting circuit for sorting iron powder from a product of the slurrying device, wherein the iron sorting circuit comprises an iron powder pump, a second thickening container, a third diaphragm pump, an agitator mill and a third filter device, which are connected sequentially, wherein an inlet of the iron powder pump is connected to an outlet of the slurrying device, wherein an inlet of the agitator mill is also connected to an acid tank, a salt sorting circuit for sorting metal-containing salt from a product of the third filter device, wherein the salt sorting circuit has a collection tank and a three-stage condenser, wherein an inlet of the collection tank is connected to an outlet of the third filter device, a water supply circuit which is designed to supply the slurry device, the first floating device, the second floating device, the third floating device and the first gravity separator with water, and to collect an overflow water which flows from a top of the first thickening tank and a top of the second thickening tank, respectively. container, wherein the water supply circuit comprises a water storage device, the inlet of which is connected not only to an overflow hole of the first thickening container, but also to an overflow hole of the second thickening container, while an outlet of the water storage device is connected via a first water pump to an inlet of the slurry device, the inlet of the first floating device, an inlet of the second floating device, an inlet of the third floating device and an inlet of the first gravity separator, wherein the carbon sorting circuit is designed with a first carbon-iron sorting branch and a second carbon-iron sorting branch, wherein both the first carbon-iron sorting branch and the second carbon-iron sorting branch are designed to also sort out iron from a product of the carbon sorting, wherein the first carbon-iron sorting branch comprises a fourth slurry pump, a fourth cyclone and a second gravity separator, which are connected sequentially, and wherein an inlet of the fourth Sludge pump is connected to an outlet of the first floating device, and wherein an outlet of the second gravity separator is connected to the inlet of the iron powder pump, and wherein the second carbon-iron sorting branch is formed by connecting an outlet of the first gravity separator to the inlet of the iron powder pump, wherein a circuit for complementing water and salt is provided in the water supply circuit, wherein the circuit for complementing water and salt comprises a vessel for concentrated salt and a vessel for distilled water, wherein an inlet of the vessel for concentrated salt is connected to the outlet of the water storage device, wherein an outlet of the vessel for concentrated salt is connected to an inlet of the three-stage evaporator, while an inlet of the vessel for distilled water is connected to an outlet of the three-stage evaporator, and wherein the outlet of the vessel for distilled water is connected to an inlet of the water storage device via a second water pump, wherein the water storage device comprises: a water reservoir (1) for collecting and filtering the overflow water from the first thickening tank and the second thickening tank, a water supply tank (3) which is in communication with the water reservoir (1) and which is designed to concentrate a salt water which is filtered via the water reservoir (1), a concentrated salt tank (4) which is in communication with the water supply tank (3) and which is designed to store the salt water which is concentrated via the water supply tank (3), a water supply line (6) which is in communication with the water supply tank (3) by a third water pump and which is designed to supply the slurry device, the first floating device, the second floating device, the third floating device, the first gravity separator and the second gravity separator with water, a distilled water tank (5) for collecting water from the distilled water vessel, which is in communication with a side wall of the water supply line (6), wherein a filter screen (11) for collecting foreign substances in the overflow water, a filter plate (12) with a recess for filtering (121), the lower end of which is open, and an atomizer disk (13) are fastened vertically one after the other in the water reservoir (1), wherein a filter unit (2) designed to filter sand grains and dust in the overflow water is mounted in the recess for filtering (121), and wherein the atomizer disk (13) is fastened to a lower end of the water reservoir (1), and wherein the lower end of the water reservoir (1) is connected to an upper end of the water supply tank (3) via a line, and wherein a lower end of the recess for filtering (121) is provided with a closure plate (122), wherein between the closure plate (122) and the recess for filtering (121) a closing spring (123) is firmly connected, which is designed to close a lower end of the recess for filtering (121) with the closure plate (122). close, wherein the filter unit (2) comprises a filter box (21) in the recess for filtering (121) and a honeycomb-shaped filter ball (22) in the filter box (21), wherein a plurality of guide tubes (211) are connected in a tangential direction to a side wall at an upper end of the filter box (21), while a plurality of water outlet openings (212) are formed on the side wall at a lower end thereof, and wherein more than two locking lugs (213) are firmly connected to the lower end of the filter box (21), which are located between the recess for filtering (121) and the closure plate (122), wherein the lower end of the recess for filtering (121) is formed with more than two guides (124), each of which is assigned to one of the locking lugs (213) and is each adapted to one of the locking lugs, wherein the guides (124) are designed such that the locking lugs (213) can be pushed out of the lower end of the filter recess (121). The sorting system for metallurgical ash according to claim 1 , characterized in that a frame for reverse osmosis membrane (31) is slidably arranged in the water supply tank (3), wherein on a communication point between the water supply tank (3) and the water reservoir (1), a drive cylinder (32) is provided on the side of the reverse osmosis membrane frame (31) remote from the water reservoir (1), which is fixedly connected to the water supply tank (3), and wherein a movable end of the drive cylinder (32) is fixedly connected to the reverse osmosis membrane frame (31), and wherein a blocking plate (33) having a lower density than salt water is hinged to a communication point between the water supply tank (3) and the water reservoir (1). The sorting system for metallurgical ash according to claim 2 , characterized in that the lower end of the water supply tank (3) is provided with a liquid outlet opening (34) on a side close to the blocking plate (33), a liquid outlet plate (35) being provided within the liquid outlet opening (34), and the liquid outlet plate (35) being hinged to the water supply tank (3) on a side close to the reverse osmosis membrane frame (31) and being firmly connected to a push rod (351) which is inclined upwards in the direction of the reverse osmosis membrane frame (31), and a closing spring (352) being firmly connected between the liquid outlet plate (35) and the water supply tank (3), and the closing spring (352) being designed to close the liquid outlet opening (34) with the liquid outlet plate (35), and the concentrated salt tank (4) being located below the water supply tank (3), and wherein an inlet of the concentrated salt tank is opposite the liquid outlet opening (34). The sorting system for metallurgical ash according to claim 1 , characterized in that the distilled water tank (5) is located above the water supply line (6), the lower end of which is connected to an upper end of the water supply line (6), a water outlet plate (51) being provided at the lower end of the distilled water tank (5), and the water outlet plate (51) being hinged to the distilled water tank (5) at a first hinge point on a side remote from the water supply tank (3), to which a first gear (511) is coaxially and firmly connected, and a sliding plate (52) being arranged on a side close to the water supply tank (3) below the water outlet plate (51), and the sliding plate (52) being hinged to the distilled water tank (5) at a second hinge point on which a second gear (521) is coaxially and firmly connected, and a double-sided rack (53) being arranged between the first gear (511) and the second gear (521) which is engaged with the first gear and the second gear and is slidably connected to the distilled water tank (5), and wherein a return spring (531) is attached between the double-sided rack (53) and the distilled water tank (5), and wherein the return spring (531) is adapted to move the double-sided rack (53) so that a lower end of the distilled water tank (5) is closed from the water outlet plate (51). The sorting system for metallurgical ash according to claim 4 , characterized in that a leveling plate (54) is arranged in the distilled water tank (5) so as to be vertically displaceable, the density of which is smaller than a density of distilled water, the leveling plate (54) being firmly connected to a limiting rack (55) via a rod arrangement, and the limiting rack (55) being designed to mesh with the first gear (511) when a filling level of the distilled water in the distilled water tank (5) is below a predetermined position.

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