CN108913912B - Device for recovering copper from waste slag generated in copper smelting - Google Patents
Device for recovering copper from waste slag generated in copper smelting Download PDFInfo
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- CN108913912B CN108913912B CN201810861666.4A CN201810861666A CN108913912B CN 108913912 B CN108913912 B CN 108913912B CN 201810861666 A CN201810861666 A CN 201810861666A CN 108913912 B CN108913912 B CN 108913912B
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- hydrazine hydrate
- alumina
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
- C22B7/04—Working-up slag
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B15/00—Obtaining copper
- C22B15/0026—Pyrometallurgy
- C22B15/0054—Slag, slime, speiss, or dross treating
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
- C22B7/001—Dry processes
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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Abstract
The invention discloses a device for recovering copper from waste slag generated in copper smelting, which comprises a recovery furnace and a hydrazine hydrate supply device, wherein hydrazine hydrate is supplied into the recovery furnace through the hydrazine hydrate supply device. The invention can reduce the copper content in the waste slag to below 0.1 wt%, does not need to introduce oxygen and combustible gas into the recovery furnace for heating, does not need to consume a large amount of electric energy for heating the waste slag in the recovery furnace, and has simpler structure, low cost, long service life and convenient maintenance.
Description
Technical Field
The invention relates to the technical field of copper smelting. In particular to a device for recovering copper from waste slag generated in copper smelting.
Background
In the waste slag generated in copper smelting, the copper content is higher, the temperature of the waste slag is also higher, if the waste slag is directly discarded without being recycled or is left for recycling treatment in the future, a large amount of copper resources are wasted, and the heat contained in the waste slag is wasted. Although the prior art also reports on the recycling of the waste slag, the prior art mainly focuses on two aspects:
1. electrically heating and reducing the waste slag to realize the recycling of copper in the waste slag; the method not only needs to consume a large amount of electric energy, but also needs a furnace body structure with a complex structure to heat the waste slag, and the complex furnace body has high cost and is very inconvenient to maintain.
2. The heating is realized by utilizing the reaction of oxygen and combustible gas in the furnace, the combustion of the combustible gas pollutes the environment, and the mode has the risk that the oxygen and the combustible gas are mixed in the furnace to explode.
Therefore, it is necessary to develop a device for recovering copper from the waste slag generated in copper smelting, which has a relatively simple furnace structure and a high safety coefficient in the waste slag treatment process.
Disclosure of Invention
Therefore, the technical problem to be solved by the invention is to provide a device for recovering copper from waste slag generated by copper smelting, which has a relatively simple furnace body structure and a high safety coefficient in the waste slag treatment process.
In order to solve the technical problems, the invention provides the following technical scheme: a device for recovering copper from waste slag generated in copper smelting comprises a recovery furnace and a hydrazine hydrate supply device, wherein hydrazine hydrate is supplied into the recovery furnace through the hydrazine hydrate supply device.
According to the device for recovering copper from waste slag generated in copper smelting, the bottom of the recovery furnace consists of a hydrazine hydrate conveying layer and a ventilating layer, the hydrazine hydrate conveying layer is positioned under the ventilating layer and is tightly pressed together, and a transverse hydrazine hydrate conveying alumina tube, a longitudinal hydrazine hydrate conveying alumina tube and a hydrazine hydrate conveying alumina header pipe are arranged in the hydrazine hydrate conveying layer; the lower end of the hydrazine hydrate conveying alumina main pipe extends downwards to the lower part of the hydrazine hydrate conveying layer and is communicated with a hydrazine hydrate supply port of a hydrazine hydrate supply device in a fluid mode; the upper end of the hydrazine hydrate conveying alumina main pipe is communicated with the fluid of the transverse hydrazine hydrate conveying alumina pipe, and the lower end of the longitudinal hydrazine hydrate conveying alumina pipe is communicated with the fluid of the transverse hydrazine hydrate conveying alumina pipe; the catalytic decomposition chamber is positioned between the lower bottom surface of the breathable core and the upper surface of the hydrazine hydrate conveying layer, and the upper surface of the breathable core is flush with the upper surface of the breathable layer.
The device for recovering copper from the waste slag generated in copper smelting comprises a hydrazine hydrate storage tank, a first hydrazine hydrate pump, a dehydration column, an activated alumina adsorption column, an activated carbon adsorption column and a second hydrazine hydrate pump, the liquid outlet of the hydrazine hydrate storage tank is in fluid communication with the liquid inlet of the first hydrazine hydrate pump, the liquid outlet of the first hydrazine hydrate pump is in fluid communication with the liquid inlet at the bottom of the dehydration column, the liquid outlet at the upper part of the dehydration column is communicated with the liquid inlet at the bottom of the active carbon adsorption column by fluid, the liquid outlet at the top of the active carbon adsorption column is communicated with the liquid inlet at the bottom of the active alumina adsorption column by fluid, a liquid outlet at the top of the active alumina adsorption column is in fluid communication with a liquid inlet of the second hydrazine hydrate pump, and the liquid outlet of the second hydrazine hydrate pump is in fluid communication with the hydrazine hydrate conveying alumina manifold.
In the device for recovering copper from waste slag generated in copper smelting, the dehydrating column is filled with CaC2And the top of the dehydration column is also provided with an exhaust port; the activated alumina adsorption column is filled with a material with a specific surface area of 280-360 m2Alumina particles per gram; and the activated carbon adsorption column is filled with activated carbon particles.
According to the device for recovering copper from the waste slag generated in copper smelting, the water cooling jacket is arranged on one end of the hydrazine hydrate conveying alumina main pipe below the hydrazine hydrate conveying layer.
According to the device for recovering copper from the waste slag generated in copper smelting, the inner wall of the catalytic decomposition chamber is coated with nano nickel and nano iron, and the quantity ratio of the nano nickel to the nano iron is 1: 0.2-0.8.
The technical scheme of the invention achieves the following beneficial technical effects: the copper content in the waste slag can be reduced to be below 0.1 wt%, oxygen and combustible gas do not need to be introduced into the recovery furnace for heating, a large amount of electric energy does not need to be consumed for heating the waste slag in the recovery furnace, and the recovery furnace is simpler in structure, low in cost, long in service life and convenient to maintain.
Drawings
FIG. 1 is a schematic view showing a structure of a recovery furnace in an apparatus for recovering copper from scrap generated in copper smelting according to the present invention;
FIG. 2 is a schematic view showing the structure of feeding hydrazine hydrate to a recovery furnace in the apparatus for recovering copper from scrap generated in copper smelting according to the present invention;
FIG. 3 is a schematic view showing the arrangement of the gas-permeable core on the bottom of the recovery furnace in the apparatus for recovering copper from the discard slag generated in copper smelting according to the present invention.
The reference numbers in the figures denote: 100-a recovery furnace; 200-matte outlet; 300-a waste residue outlet; 400-a waste slag inlet; 500-exhaust gas outlet; 600-furnace bottom; 1-a hydrazine hydrate transport layer; 2-a breathable layer; 3-transverse hydrazine hydrate conveying alumina tube; 4-longitudinal hydrazine hydrate conveying alumina tube; 5-hydrazine hydrate conveying alumina main pipe; 6-an air-permeable core; 7-a catalytic decomposition chamber; 8-hydrazine hydrate storage tank; 9-dehydration column; 10-activated alumina adsorption column; 11-activated carbon adsorption column; 12-a first hydrazine hydrate pump; 13-a second hydrazine hydrate pump; 14-a water cooling jacket; 15-flow regulating valve; 16-matte sink zone.
Detailed Description
A device for recovering copper from waste slag generated in copper smelting comprises a recovery furnace 100 and a hydrazine hydrate supply device, wherein hydrazine hydrate is supplied into the recovery furnace 100 through the hydrazine hydrate supply device, and the temperature in the furnace is kept at 1200 ℃.
The bottom 600 of the recovery furnace 100 consists of a hydrazine hydrate conveying layer 1 and a breathable layer 2, the hydrazine hydrate conveying layer 1 is positioned under the breathable layer 2 and is tightly pressed together, and a transverse hydrazine hydrate conveying alumina tube 3, a longitudinal hydrazine hydrate conveying alumina tube 4 and a hydrazine hydrate conveying alumina header tube 5 are arranged in the hydrazine hydrate conveying layer 1; the lower end of the hydrazine hydrate conveying alumina main pipe 5 extends downwards to the lower part of the hydrazine hydrate conveying layer 1 and is communicated with a hydrazine hydrate supply port of a hydrazine hydrate supply device in a fluid mode; the upper end of the hydrazine hydrate conveying alumina manifold 5 is in fluid communication with the transverse hydrazine hydrate conveying alumina tube 3, and the lower end of the longitudinal hydrazine hydrate conveying alumina tube 4 is in fluid communication with the transverse hydrazine hydrate conveying alumina tube 3; a gas permeable core 6 and a catalytic decomposition chamber 7 are arranged in the gas permeable layer 2, the catalytic decomposition chamber 7 is positioned between the lower bottom surface of the gas permeable core 6 and the upper surface of the hydrazine hydrate conveying layer 1, and the upper surface of the gas permeable core 6 is flush with the upper surface of the gas permeable layer 2; as shown in fig. 3, in this embodiment, the air permeable cores 6 are distributed at intervals along the diameter of the furnace bottom 600, a matte sink area 16 is located between two radially adjacent air permeable cores 6, the matte outlet 200 faces the matte sink area 16, and the matte sink areas 16 correspond to the matte outlets 200 one by one, so that the matte can flow out conveniently. The inner wall of the catalytic decomposition chamber 7 is coated with a mixed catalyst layer consisting of nano nickel and nano iron, and the mass ratio of the nano nickel to the nano iron is 1: 0.7.
The hydrazine hydrate supply device comprises a hydrazine hydrate storage tank 8, a first hydrazine hydrate pump 12, a dehydration column 9, an activated alumina adsorption column 10, an activated carbon adsorption column 11 and a second hydrazine hydrate pump 13, the liquid outlet of the hydrazine hydrate storage tank 8 is in fluid communication with the liquid inlet of the first hydrazine hydrate pump 12, the liquid outlet of the first hydrazine hydrate pump 12 is in fluid communication with the liquid inlet at the bottom of the dehydration column 9, the liquid outlet at the upper part of the dehydration column 9 is communicated with the liquid inlet at the bottom of the active carbon adsorption column 11 by fluid, the liquid outlet at the top of the activated carbon adsorption column 11 is communicated with the liquid inlet at the bottom of the activated alumina adsorption column 10, the liquid outlet at the top of the activated alumina adsorption column 10 is in fluid communication with the liquid inlet of the second hydrazine hydrate pump 13, the liquid outlet of the second hydrazine hydrate pump 13 is in fluid communication with the hydrazine hydrate conveying alumina manifold 5. The dehydration column 9 is filled with CaC2And the top of the dehydration column 9 is also provided with an exhaust port; the activated alumina adsorption column 10 is filled with a material with a specific surface area of 280-360 m2Alumina particles per gram; the activated carbon adsorption column 11 is filled with activated carbon particles. And a water cooling jacket 14 is arranged at one end of the hydrazine hydrate conveying alumina main pipe 5 below the hydrazine hydrate conveying layer 1.
In this example, the industrial hydrazine hydrate concentration in the hydrazine hydrate storage tank is 99wt%, and the industrial hydrazine hydrate is pumped into the dehydration column 9 from the bottom of the dehydration column 9 by the first hydrazine hydrate pump 12Water in hydrazine hydrate with CaC2The hydrazine hydrate is dehydrated through reaction, acetylene generated by the reaction is discharged from the top of a dehydration column 9, the dehydrated hydrazine hydrate flows out from the upper part of the dehydration column 9 and enters an activated carbon adsorption column 11 from the bottom of the activated carbon adsorption column 11, the hydrazine hydrate is subjected to impurity removal, the hydrazine hydrate after impurity removal flows out from the top of the activated carbon adsorption column 11 and enters an activated alumina adsorption column 10 from the bottom of the activated alumina adsorption column 10 to realize further impurity removal, the dehydrated and impurity-removed hydrazine hydrate is pumped into a hydrazine hydrate conveying alumina main pipe 5 through a second hydrazine hydrate pump 13, the hydrazine hydrate in the hydrazine hydrate conveying alumina main pipe 5 is cooled through circulating cooling water in a water cooling jacket 14, the hydrazine hydrate is prevented from being gasified violently in the hydrazine hydrate conveying alumina main pipe 5 to cause uneven conveying of the hydrazine hydrate in each transverse hydrazine hydrate conveying alumina pipe 3, so that the amount difference of the hydrazine hydrate conveyed by each longitudinal hydrazine hydrate conveying alumina pipe 4 is large, finally, the amount of local air supplied to the bottom of the recycling furnace 100 is too large and too small, which is not favorable for sufficient separation of copper from the waste slag.
The purified hydrazine hydrate is decomposed in the catalytic decomposition chamber to generate nitrogen, hydrogen and ammonia gas, and a large amount of heat is released, so that the effects of heating and insulating the waste slag in the recovery furnace are achieved. Nitrogen, hydrogen and ammonia enter the recovery furnace 100 through the ventilative core 6 in, play the mixing stirring and fully take place reduction reaction to abandoning the sediment on the one hand, on the other hand ammonia enters the recovery furnace 100 and decomposes the in-process that becomes hydrogen and can react with the copper in the sediment of abandoning the sediment in the bottom of recovery furnace 100 and generate copper hydride in addition, ammonia can also copper reaction generate copper nitride, copper hydride and copper nitride volatilize the come-up, because heat heating and heat preservation through the hydrazine hydrate decomposition production of bottom, therefore the temperature reduces from bottom to top in the recovery furnace 100 gradually, copper hydride and copper nitride come-up in-process decompose and generate simple substance copper and redeposit to the recovery furnace 100 bottom again, thereby can fully separate out the copper in the sediment. The matte flows out from a matte outlet 200 on the side wall of the bottom of the recovery furnace 100, the level of the matte outlet 200 is less than that of a waste residue outlet 300, and the waste residue flows out from the waste residue outlet 300 on the side wall of the recovery furnace 100.
The amount of hydrazine hydrate supplied can be adjusted by the flow control valve 15 according to the size of the recovery furnace 100, the amount of the waste slag charged, and the heat retaining effect of the recovery furnace 100, thereby ensuring that the waste slag in the recovery furnace 100 is kept in a molten state.
The device that this embodiment was retrieved copper from abandoning sediment that copper smelting produced need not heat to letting in oxygen and combustible gas in the recovery furnace 100, also need not consume a large amount of electric energy and heat the sediment of abandoning in the recovery furnace for the structure of recovery furnace is simpler, with low costs, long service life, easy maintenance, and the security is high moreover, can reduce to 0.08 wt% the copper content in abandoning the sediment.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications are possible which remain within the scope of the appended claims.
Claims (4)
1. A device for recovering copper from waste slag generated in copper smelting is characterized by comprising a recovery furnace (100) and a hydrazine hydrate supply device, wherein hydrazine hydrate is supplied into the recovery furnace (100) through the hydrazine hydrate supply device;
the bottom (600) of the recovery furnace (100) consists of a hydrazine hydrate conveying layer (1) and a ventilation layer (2), the hydrazine hydrate conveying layer (1) is positioned under the ventilation layer (2) and is tightly pressed together, and a transverse hydrazine hydrate conveying alumina tube (3), a longitudinal hydrazine hydrate conveying alumina tube (4) and a hydrazine hydrate conveying alumina header tube (5) are arranged in the hydrazine hydrate conveying layer (1); the lower end of the hydrazine hydrate conveying alumina main pipe (5) extends downwards to the lower part of the hydrazine hydrate conveying layer (1) and is communicated with a hydrazine hydrate supply port of a hydrazine hydrate supply device in a fluid mode; the upper end of the hydrazine hydrate conveying alumina manifold (5) is in fluid communication with the transverse hydrazine hydrate conveying alumina tube (3), and the lower end of the longitudinal hydrazine hydrate conveying alumina tube (4) is in fluid communication with the transverse hydrazine hydrate conveying alumina tube (3); a gas permeable core (6) and a catalytic decomposition chamber (7) are arranged in the gas permeable layer (2), the catalytic decomposition chamber (7) is positioned between the lower bottom surface of the gas permeable core (6) and the upper surface of the hydrazine hydrate conveying layer (1), and the upper surface of the gas permeable core (6) is flush with the upper surface of the gas permeable layer (2);
the hydrazine hydrate feeding device comprises a hydrazine hydrate storage tank (8), a first hydrazine hydrate pump (12), a dehydration column (9), an activated alumina adsorption column (10), an activated carbon adsorption column (11) and a second hydrazine hydrate pump (13), wherein a liquid outlet of the hydrazine hydrate storage tank (8) is communicated with a liquid inlet fluid of the first hydrazine hydrate pump (12), a liquid outlet of the first hydrazine hydrate pump (12) is communicated with a liquid inlet fluid at the bottom of the dehydration column (9), a liquid outlet at the upper part of the dehydration column (9) is communicated with a liquid inlet fluid at the bottom of the activated carbon adsorption column (11), a liquid outlet at the top of the activated carbon adsorption column (11) is communicated with a liquid inlet fluid at the bottom of the activated alumina adsorption column (10), a liquid outlet at the top of the activated alumina adsorption column (10) is communicated with a liquid inlet fluid of the second hydrazine hydrate pump (13), the liquid outlet of the second hydrazine hydrate pump (13) is in fluid communication with the hydrazine hydrate conveying alumina manifold (5); the inner wall of the catalytic decomposition chamber (7) is coated with nano nickel and nano iron, and the mass ratio of the nano nickel to the nano iron is 1: 0.2-0.8.
2. The apparatus for recovering copper from the waste slag generated by copper smelting according to claim 1, wherein the dehydration column (9) is filled with CaC2And the top of the dehydration column (9) is also provided with an exhaust port; the activated alumina adsorption column (10) is filled with a material with a specific surface area of 280-360 m2Alumina particles per gram; the activated carbon adsorption column (11) is filled with activated carbon particles.
3. The apparatus for recovering copper from the discard slag generated by copper smelting according to claim 1, characterized in that a water cooling jacket (14) is installed on one end of the hydrazine hydrate conveying alumina main pipe (5) below the hydrazine hydrate conveying layer (1).
4. An apparatus for recovering copper from scrap produced in copper smelting according to any one of claims 1 to 3, characterised in that the concentration of industrial hydrazine hydrate in the hydrazine hydrate storage tank (8) is greater than or equal to 99% by weight.
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| CN201810861666.4A CN108913912B (en) | 2018-08-01 | 2018-08-01 | Device for recovering copper from waste slag generated in copper smelting |
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| CN108913912B true CN108913912B (en) | 2020-11-13 |
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| CN108893618B (en) * | 2018-08-01 | 2020-06-19 | 济源职业技术学院 | Method for treating waste slag in copper smelting |
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| CN105132707A (en) * | 2015-09-23 | 2015-12-09 | 福达合金材料股份有限公司 | Method for recycling silver from silver-copper composite material |
| CN105385853A (en) * | 2015-11-12 | 2016-03-09 | 江西铜业技术研究院有限公司 | Treatment method for waste copper-bearing magnesite brick |
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2018
- 2018-08-01 CN CN201810861666.4A patent/CN108913912B/en not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62270735A (en) * | 1986-05-19 | 1987-11-25 | Nippon Mining Co Ltd | Recovering method for tin |
| US6436358B1 (en) * | 1999-03-01 | 2002-08-20 | The Regents Of The University Of California | Metals removal from spent salts |
| CN102994766A (en) * | 2012-12-12 | 2013-03-27 | 四会市鸿明贵金属有限公司 | Method for comprehensively recovering valuable metal from copper tellurium slag |
| CN103966456A (en) * | 2014-05-23 | 2014-08-06 | 江西理工大学 | Method for comprehensively recovering valuable metals from copper anode sludge silver separating slag |
| KR101465032B1 (en) * | 2014-06-18 | 2014-11-26 | 인천화학 주식회사 | Recycle process of high purity nickel powder from waste nickel plating solution and High purity nickel powder using that |
| CN105132707A (en) * | 2015-09-23 | 2015-12-09 | 福达合金材料股份有限公司 | Method for recycling silver from silver-copper composite material |
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