JP2017113684A - Compound production apparatus for particulate matter and production method thereof - Google Patents

Abstract

An object of the present invention is to reduce the size and cost of an entire production apparatus by performing a plurality of production steps with a single apparatus. A striking rotor 20 for crushing a crushing raw material while rotating, a screen 30 rotating in a reverse direction to the striking rotor 20, a cylindrical casing 40 containing the screen 30 therein, and a dust collector 50 for sucking fine powder. The crushing raw material crushing process by the striking rotor 20, the granular substance grinding process by circulating the dead bed in the screen 30, the screening process by the screen 30, and the fine powder classification process by the dust collector 50 are performed in parallel. And do it. [Selection] Figure 2

Description

  The present invention relates to a technique for producing granular materials such as recycled aggregates from crushed stone, minerals such as lime, or concrete waste, and in particular, a series of crushing steps, grinding steps, sorting steps, and classification steps are performed with a single device. The present invention relates to a composite production apparatus for granular materials and a production method thereof.

For example, in order to take out coarse aggregate and fine aggregate contained in concrete scrap as recycled aggregate, at least (1) crushing crushing concrete scrap using a crusher such as a centrifugal crusher, jaw crusher, ball mill, etc. Process, (2) Grinding process to remove the deposits on the surface of crushed material using a grinding device such as shot blasting, rubbing and cleaning, (3) Using a screening device such as a sieve or air type Therefore, it is necessary to go through a sorting process for sorting into aggregates, cements, and the like having various particle diameter ranges (Patent Documents 1 to 3).
Further, a classification process may be added by collecting fine powder with a classification device (Patent Document 4).

JP 2004-41859 A (FIG. 1) Japanese Patent Laying-Open No. 2009-606 (FIG. 1) JP 2004-238274 A (FIG. 2) Japanese Patent Laying-Open No. 2009-61357 (FIG. 1)

The prior art for producing various particulate materials has the following problems.
<1> Since a plurality of independent dedicated devices (such as a crusher, a grinding device, and a sorting device) are used in correspondence with a plurality of processing steps, the entire production plant is increased in size and occupied space, and the equipment cost is increased. Become very expensive.
<2> Not only does the equipment cost increase, but since each dedicated device has a drive source, the total power consumption increases and the production cost of the granular material becomes high.

The present invention has been made in view of the above points, and an object of the present invention is to provide at least one of the following composite production apparatus for granular substances and a production method thereof.
<1> A single device can process a plurality of processes, thereby reducing the size and cost of the entire production plant.
<2> Reduce facility costs and power consumption, and reduce the unit cost of production of granular materials.

The present invention relates to a granular material composite production apparatus for producing a granular material by crushing a crushed raw material containing a granular material, and a striking rotor that strikes and crushes the crushed raw material while rotating around a horizontal rotation shaft, and A cylindrical screen that accommodates the striking rotor inside, and that screens the granular material while rotating in a direction opposite to the striking rotor around a horizontal virtual rotation axis; A cylindrical casing that collects particulate matter that has passed through the screen while rotating integrally with the screen around the virtual rotation axis of the cylinder, communicates with the inner space of the casing, and sucks and classifies fine powder in the casing And an annular crushing chamber is formed between the percussion rotor and the peripheral surface of the screen.
In another embodiment of the present invention, the striking rotor includes a rotor body that rotates about a horizontal rotation shaft, and a plurality of hammer bodies that project from the outer peripheral surface of the rotor body, and the rotation of the screen The crushing raw material supplied to the striking rotor is hit with a plurality of hammer bodies and crushed.
In another embodiment of the present invention, if the rotation center of the striking rotor is eccentric with respect to the common rotation center of the screen and the casing, the inner space of the crushing chamber can be effectively utilized.
In another embodiment of the present invention, a plurality of window holes are formed in the central portion of the casing along the circumferential direction, and particulate matter can be discharged and supplied through the plurality of window holes.
In another embodiment of the present invention, the screen may be composed of a plurality of divided screens, and a gap may be formed in the overlapping portion where the ends of adjacent divided screens are overlapped.
In another embodiment of the present invention, a supply chute is disposed on the side of the casing, and the crushing raw material is supplied to the crushing chamber in the screen through the supply chute.
Furthermore, the present invention is a production method for producing a granular material from a crushed raw material, the step of crushing a crushed raw material circulated in a screen by a striking rotor using any one of the above-described combined production apparatuses, In this process, the particulate material is pulverized while being rotated and mixed, the particulate material is sorted through the opening of the screen, and the fine particles in the screen are classified and collected by the dust collector. It is characterized by producing.
In another embodiment of the invention, the particulate material is recycled aggregate.

The present invention has at least one of the following effects.
<1> Conventionally, a plurality of independent dedicated devices (such as a crusher, a grinding device, and a sorting device) corresponding to a plurality of processing steps have been used, but in the present invention, a single complex production device is used. Since granular materials such as recycled aggregates can be produced, not only can the equipment cost be greatly reduced, but the installation space for the combined production apparatus can be significantly reduced.
<2> Since the number of drive sources can be greatly reduced as compared with the conventional case, the power consumption required for the production of the granular material can be greatly reduced, and the production cost of the granular material can be finally reduced.
<3> Since the impact destruction by the impact rotor and the impact destruction to the dead bed formed in the vertical direction around the impact rotor can be performed in parallel, efficient crushing and grinding can be performed.
<4> Since the crushing raw material can be crushed using the rotation of the screen, it can be crushed homogeneously.
<5> Since the dead bed covers the inner peripheral surface of the screen, it is possible to protect the screen from flying and crushed flying objects, and to suppress wear and damage of the screen.
<6> Since the crushing raw material can be supplied to the crushing chamber through a supply chute having a simple structure, a complicated crushing raw material supply device is not required.
<7> The large-diameter aggregate remaining in the screen can be discharged to the outside through the gap formed in the overlapping portion of the divided screens simply by rotating the screen in the reverse direction during crushing.

The whole perspective view of the combined production apparatus of the granular material concerning the present invention Longitudinal sectional view of the combined production equipment Sectional view of III-III in Fig. 2 Perspective view of striking rotor with part of the screen omitted

Hereinafter, embodiments of the present invention will be described in detail.
In this example, the crushed raw material is concrete waste containing aggregate, and the case where recycled aggregate is produced from this concrete waste will be explained, but the crushed raw material is other minerals such as crushed stone, lime, hard lump food, pharmaceuticals, etc. It can be applied to the production of various granular materials of final products.

<1> Function of Composite Production Device The composite production device 100 shown in FIG. A grinding function that removes deposits on the surface of aggregates by rubbing and rubbing action, a sorting function that screens recycled aggregate B to product size by sieving action, and a fine powder (filer) C classified from aggregate It is a composite device that has a function of classifying dust and that can perform a series of crushing steps, grinding steps, sorting steps, and classification steps with a single device.
The crushing raw material A is obtained by crushing concrete waste materials and asphalt generated at various sites to a size of 100 mm or less (preferably 40 mm to 0 mm) with a known crusher.

<2> Configuration of Composite Production Device The configuration will be described in detail with reference to FIGS. 2 to 4. The composite production device 100 accommodates a striking rotor 20 that rotates about a horizontal rotation shaft 22 and a striking rotor 20 inside. The cylindrical screen 30 that rotates in the opposite direction to the striking rotor 20 around the horizontal virtual rotation axis, and the screen 30 is housed inside, and rotates integrally with the screen 30 around the horizontal virtual rotation axis. And a dust collector 50 that sucks and classifies the fine powder C in the casing 40.
The main devices are described in detail below.

<3> Stroke Rotor The striking rotor 20 includes a rotor main body 22 that rotates at a high speed around a horizontal rotation shaft 21, and a plurality of hammer bodies 23 that protrude from the outer peripheral surface of the rotor main body 22.
Both ends of the rotary shaft 21 are rotatably supported by the support member 12, and the striking rotor 20 is rotated by the rotation of a drive source M such as a motor.
The rotation direction of the striking rotor 20 is opposite to the rotation direction of the screen 30 and the casing 40.
The hammer body 23 may be a hard protrusion that can crush the crushing material A, and the cross-sectional shape, protrusion length, installation interval, and the like of the hammer body 23 are appropriately selected.

<4> Screen The screen 30 is a cylindrical rotary sieve for selecting a product size and a product larger than the product size while crushing and polishing the crushing raw material A in cooperation with the striking rotor 20.
The screen 30 has openings at both ends fixed to the casing 40.
Since the screen 30 rotates integrally with the rotation of the casing 40, a drive source dedicated to the screen is unnecessary.
An annular crushing chamber S is formed in the screen 30, and the crushing raw material A can be supplied into the crushing chamber S through the supply chute 11 continuously or intermittently.
The crushing raw material A supplied into the crushing chamber S becomes a deposited layer covering the inner peripheral surface of the screen 30 and forms a dead bed D.
The rotational speed of the screen 30 is a speed at which the crushing raw material A and the like drop by their own weight before the dead bed D reaches the top position of the screen 30.
The screen 30 has a large number of slit-shaped openings on its peripheral surface, and sieves the granular material.
Although the slit-shaped opening width of the screen 30 is appropriately selected, the opening width when the recycled aggregate B is produced is preferably about 5 mm.

The screen 30 illustrated in FIG. 3 includes a plurality of divided screens 30a having an arc shape.
In this example, a configuration in which the divided screen 30a is configured by a plurality of bars arranged in parallel in the same direction at a predetermined interval is shown, but the divided screen 30a may be configured by a perforated plate.
Near the ends of the adjacent divided screens 30a and 30a are overlapped with each other, and a gap G is formed in the overlapped portion of each divided screen 30a.
The reason why the end portions of the divided screens 30a and 30a are polymerized is to prevent the crushing raw material A and the recycled aggregate B from leaking through the gap G during crushing.
The gap G is formed in the overlapping portion of the divided screens 30a and 30a by rotating the screen 30 in the reverse direction at the time of crushing, so that the large-diameter aggregate remaining in the screen 30 is passed through the gap G into the casing 40. It is for discharging.

<5> Casing The casing 40 has a substantially abacus shape (substantially lantern shape) and is a rotating cylinder having both left and right ends opened, and functions to collect the recycled aggregate B and the like that have passed through the screen 30.
A roller 41 that rotates under the driving of a motor (not shown) supports the outer periphery of both sides of the casing 40 that is placed horizontally. The casing 40 receives the rotational driving of the roller 41 and is unidirectional around a virtual horizontal rotation axis. Or it rotates in the forward and reverse direction.
The inner diameter of the casing 40 is formed such that the central portion is larger than both end portions, and the inner peripheral surface thereof is tapered so as to be inclined downward toward the central portion so that the recycled aggregate B can be collected by its own weight. Is formed.
Furthermore, the center part of the casing 40 has a plurality of window holes 42 along the circumferential direction.
The window hole 42 has both a function of discharging the collected recycled aggregate B and the like and a function of taking air into the casing 40.
A lower end of the supply chute 11 is guided to the opening on the left side of the casing 40 in the drawing, and a trumpet-shaped collecting tube 43 is connected to the opening on the right side of the casing 40 in the drawing.

<6> When referring to relationship diagram 3 of the center of rotation of the striking rotor and the screen and the casing will be described, although the screen 30 and the casing 40 are both rotating center O ₁ is the same, the rotational center O ₂ of the striking rotor 20 is ahead eccentric obliquely upward with respect to the rotational center O ₁ of the.
The reason why the rotation center O ₂ of the striking rotor 20 is eccentric is to effectively utilize the inner space of the screen 30 to ensure a wide crushing space S.
In this example, although the embodiment in which the rotation center axes of the striking rotor 20, the screen 30, and the casing 40 are all horizontal is illustrated, these rotation center axes may be inclined slightly upward and downward with respect to the horizontal.

<7> Dust Collector As shown in FIG. 2, a dust collector 50 is connected to the collection pipe 43 via a pipe 51, and the fine powder C floating in the crushing chamber S by suction of the dust collector 50 is collected by suction and classified. It can be done.

[Production method of recycled aggregate]
Next, a method for producing recycled aggregate, which is an example of a particulate material, will be described.

<1> Crushing Step In FIGS. 2 and 3, the crushing raw material A crushed to 40 mm or less, for example, is supplied to the crushing chamber S through the supply chute 11.
The crushing raw material A supplied into the crushing chamber S of the screen 30 can be efficiently crushed by repeating a plurality of crushing actions described below.

<1.1> Circulation of Dead Bed The crushing raw material A is supplied into the screen 30 that rotates in one direction through the supply chute 11.
The crushed raw material A spreads over the entire length of the screen 30, and the layered dead bed D is formed from the bottom of the screen 30 to the top while the crushed raw material A circulates and moves in the screen 30.
The circulating movement of the crushed raw material A is a phenomenon in which the crushed raw material A that has moved until it approaches the top of the screen 30 falls by its own weight, and the crushed raw material A that has fallen is captured in the lower part of the dead bed D and is again the inner periphery of the screen 30 Refers to the repetition of the phenomenon of covering a surface.

<1.2> Crushing by Hammer Body As indicated by arrows in FIGS. 3 and 4, when the crushing raw material A naturally falls and is supplied to the striking rotor 20 as the screen 30 rotates, a plurality of rotating materials are rotated at high speed. The hammer body 23 strikes and crushes the crushing raw material A.
The crushing by the plurality of hammer bodies 23 is repeatedly performed on the crushing raw material A circulating in the screen 30.

<1.3> Collision Crushing to Dead Bed As the crushing raw material A is hit by the plurality of hammer bodies 23, the crushed material scatters toward the periphery of the hitting rotor 20.
The crushed material A is crushed again when the crushed material scattered at high speed collides with the surface of the dead bed D on the side.

<1.4> Simultaneous Progression of Crushing In the crushing chamber S, while the dead bed D repeatedly circulates, the hitting crushing by the hammer body 23 and the crushing crushing to the dead bed D proceed simultaneously.
Moreover, since the crushing action described above proceeds over the entire length of the striking rotor 20 and the screen 30 disposed sideways, a large amount of the crushing raw material A can be efficiently crushed.
In particular, since the dead bed D is mixed with the circulating movement of the crushing raw material A, only the aggregate on the surface layer of the dead bed D is pulverized, or the large-diameter aggregate remains on the back side without being crushed. And the entire dead bed D can be uniformly crushed.
In the crushing step, the inner surface of the screen 30 is covered and protected by the layered dead bed D, so that direct impact of flying objects on the screen 30 can be avoided.

<2> Grinding process In the crushing process in the crushing chamber S described above, when the raw materials and aggregates roll in the dead bed D, they collide with each other or are rubbed together. Grinding proceeds.
That is, in the combined production apparatus 100 of the present invention, the crushing process and the grinding process proceed in parallel, so that the crushing and grinding can be efficiently performed in a short time.
The crushing time and grinding time are appropriately selected while confirming the crushing status and grinding status of the crushing raw material A.

<3> Sorting process Among the regenerated aggregates B such as coarse aggregates and fine aggregates that are produced based on the crushing raw material A, the regenerated aggregate B smaller than the opening on the peripheral surface of the screen 30 is opened. , And is collected at the bottom of the casing 40 and collected through the window hole 42.
Those having a size larger than the opening of the screen 30 remain in the screen 30 and continue the crushing and grinding processes described above.
In this example, the transporting conveyor 60 disposed immediately below the casing 40 is used as the transporting means for the recycled aggregate B. However, a known collecting means can be applied in addition to the conveyor.
Thus, in the combined production apparatus 100, not only the crushing process and the grinding process but also the sorting process of the recycled aggregate B can be performed in parallel.

<4> Classifying Step In FIG. 2, the dust collector 50 sucks the crushing chamber S through the collecting pipe 43 and the pipe 51, so that only the fine powder C flying in the crushing chamber S is sucked and classified, and finally the tank 52 Collect them in a similar manner.
If the casing 40 has a structure close to sealing, there is a risk that aggregates heavier than the fine powder C may be accidentally sucked, but by opening a plurality of window holes 42 in a part of the casing 40 and communicating with the atmosphere, the weight is reduced. Only fine powder C can be sucked.
In the present invention, a series of crushing process, grinding process, sorting process, and classification process can be efficiently performed with one combined production apparatus 100.
Furthermore, compared to a conventional recycled aggregate production plant that uses a dedicated device for each process, the combined production device 100 can reduce the number of drive sources such as motors, thereby greatly reducing power consumption and The production unit price can be reduced.

A: Crushed raw material B: Recycled aggregate (granular material)
C ... Fine powder D ... Dead bed G ... Separation screen gap S of split screen ... Shredding chamber 100 ... Composite production device 11 ... Hopper 12 ···· Support member 20 ··· Blowing rotor 21 ··· Rotary shaft 22 ··· Rotor body 23 ··· Hammer body 30 ··· Screen 30a · · · Split screen 40 ··· · Casing 41 ··· Roller 42 ··· Window hole

Claims (9)

A granular material composite production apparatus for producing a granular material by crushing a crushing raw material containing the granular material,
A striking rotor that strikes and crushes the crushing raw material while rotating around a horizontal rotating shaft,
A cylindrical screen that accommodates the striking rotor inside and screens particulate matter while rotating in a direction opposite to the striking rotor around a horizontal virtual rotation axis;
A cylindrical casing that contains a screen inside and collects particulate matter that has passed through the screen while rotating integrally with the screen around a horizontal virtual rotation axis;
A dust collector that communicates with the inner space of the casing and sucks and classifies fine powder in the casing;
An annular crushing chamber is formed between the percussion rotor and the peripheral surface of the screen,
Complex production equipment.   The crushing raw material which is provided toward the striking rotor by the rotation of the screen, comprising: a rotor main body in which the striking rotor rotates about a horizontal rotation shaft; and a plurality of hammer bodies protruding from the outer peripheral surface of the rotor main body. The combined production apparatus according to claim 1, wherein the apparatus is crushed by hitting with a plurality of hammer bodies.   The combined production apparatus according to claim 1, wherein the rotation center of the striking rotor is eccentric with respect to a common rotation center of the screen and the casing.   The combined production apparatus according to any one of claims 1 to 3, wherein a plurality of window holes are formed along a circumferential direction in a central portion of the casing.   5. The composite production according to claim 1, wherein the screen is composed of a plurality of divided screens, and a gap is formed in a superposed portion where the ends of adjacent divided screens are overlapped with each other. apparatus.   The combined production apparatus according to any one of claims 1 to 5, wherein a supply chute is disposed on a side of the casing, and the crushing raw material is supplied to the crushing chamber in the screen through the supply chute.   The composite production apparatus according to claim 1, wherein the particulate material is recycled aggregate. A production method for producing a granular material from a crushed raw material,
Using the combined production apparatus according to any one of claims 1 to 7,
Crushing the crushing raw material circulating and moving in the screen by the striking rotor;
A process of grinding while rotating and mixing the granular material in the screen;
Screening the particulate matter through the opening of the screen;
It is characterized by producing particulate matter by performing in parallel with a classification process of classifying and collecting fine powder in the screen with a dust collector,
Production method of granular material.   9. The method for producing a granular material according to claim 8, wherein the granular material is a recycled aggregate.

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