JPWO2014041586A1 - Granular material mill and particulate material production plant - Google Patents

Abstract

[Summary] [Problem] [Solution] To provide a reclaimed aggregate grinding apparatus and a production plant capable of performing efficient grinding by causing abrasive grains to uniformly collide with the entire raw material. [Solution] To a raw material A that has a blast rotor 20 that discharges abrasive grains B by centrifugal force due to rotation and a rotary sorter 30 that rotatably accommodates the blast rotor 20, and stays in the rotary sorter 30. Then, the abrasive grains B were discharged from the blast rotor 20 so as to shot blast the particulate material.

Description

  The present invention relates to a granular material grinding apparatus and a granular material production plant for grinding granular materials such as various aggregates and soils by shot blasting.

In recent years, the disposal of a large amount of concrete waste generated with the dismantling of various concrete structures has become a problem.
The aggregated material such as coarse aggregate and fine aggregate, which is a granular material contained inside by crushing the waste concrete material, is used as recycled aggregate.

  Simply crushing the concrete waste will leave deposits such as mortar components on the aggregate surface. If recycled aggregates are used with deposits remaining, the quality of the concrete will deteriorate, so deposits must be removed as much as possible.

The following methods are known as methods for removing the deposits.
<a> A “re-crushing method” that repeats crushing several times using a centrifugal crusher (Patent Document 1).
<B> A “rubbing method” that mechanically rubs and grinds concrete glass supplied between the peripheral surfaces of a vertical or horizontal double rotating drum under high pressure (Patent Document 2).
<C> A “ball mill method” in which a drum is partitioned by a plurality of rotating partition plates to form a plurality of grinding chambers, and aggregates are ground by metal balls loaded in each grinding chamber (Patent Document 3).
<D> A “shot blasting method” in which abrasive grains collide with a dropped aggregate (Patent Document 4).

JP 2008-266109 A JP 2008-44799 A JP 2003-10711 A JP 2011-111342 A

Conventional granular material manufacturing techniques have the following problems.
<1> In the re-crushing method of Patent Document 1, the aggregate breaks due to repeated collisions between the aggregates, and not only the recovery rate of recycled aggregates of 5 mm or more is extremely deteriorated, but also pulverization. There is a problem that a large amount of aggregate is generated as powdered waste.
<2> In the methods of Patent Documents 2 and 3, since the crushing action and the grinding action are small, it takes a very long time to remove the deposits.
<3> Although the shot blasting method of Patent Document 4 can prevent the breakage of the aggregate, since the collision of the abrasive grains is limited to a short section (time), the abrasive grains are uniformly collided with the entire aggregate being dropped. It is technically difficult.

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 granular material grinding apparatus and granular material production plant.
<1> Efficient grinding by allowing the abrasive particles to collide evenly with the entire granular material.
<2> Effective utilization of a part of the granular material as abrasive grains.
<3> The abrasive grains are finally polished and can be recovered as high-quality recycled sand.

The present invention is an apparatus for grinding granular material that produces granular material from a raw material containing granular material, a blast rotor that discharges abrasive grains by centrifugal force due to rotation, and rotational sorting that rotatably accommodates the blast rotor And a raw material supply system for supplying a raw material containing particulate matter into the rotary sorter, and an abrasive grain supply system for supplying abrasive grains to the blast rotor, and a raw material for the granular material staying in the rotary sorter Abrasive grains are discharged from the blast rotor toward the surface and shot blasted.
In the present invention, a reflux system may be further included, and a part of the granular material selected by the rotary sorter through the reflux system may be supplied as abrasive grains to the abrasive grain supply system.
Furthermore, in the present invention, a dust collector may be further included, and the dust collector may be configured to suck and collect floating matters such as fine powder and dust that float in the rotary sorter.
Furthermore, in the present invention, the end portion of the pipe guided into the blast rotor can be discharged so that the blast rotor can discharge abrasive particles toward the raw material containing the particulate matter located in a limited effective range in the rotary sorter. You may comprise so that an abrasive grain may be discharge | released in a blast rotor through the partial discharge port formed in the side surface.
Furthermore, the present invention is a granular material production plant for producing a granular material from a raw material containing the granular material, wherein a recycled aggregate sorting device is arranged adjacent to any of the granular material grinding devices described above. It is characterized by.
Furthermore, in the present invention, the sorting device may further include a dust collector, and the dust collector may be configured to suck and collect floating matters such as fine powder and dust that flow into the sorting device.

The present invention has at least one of the following effects.
<1> By combining a blast rotor and a rotary sorter, the abrasive grains can collide evenly toward the entire granular material that spreads and stays in layers in the rotary sorter, so efficient grinding is performed. it can.
<2> Part of the granular material separated by the grinding device can be refluxed through a reflux system and effectively used as abrasive grains.
<3> The abrasive grains are finally polished and can be recovered as high-quality recycled sand.
<4> When the granular material is recycled aggregate, if the raw materials collide with each other at high speed, there is a high probability that the aggregate itself will be crushed and fragmented. In the present invention, polishing with a small mass (diameter) is performed. Since the grains collide with the raw material having a large mass (diameter), the recycled aggregate is not crushed more than necessary.
Therefore, the production efficiency of recycled aggregate of 5 mm or more can be improved, and powdered waste can be avoided by avoiding powdered recycled aggregate.
<5> Even when particulate materials such as aggregate and soil are contaminated, the contaminants adhering to the surface can be efficiently decontaminated by grinding.
<6> By attaching a dust collector to the sorting device or the grinding device, it is possible to efficiently suck and collect the suspended matter such as fine powder, dust, or pollutants that float in the sorting device or the grinding device.

Model diagram of production plant for particulate matter according to the present invention Cross section of grinding device Vertical section of blast rotor Sectional view of IV-IV in FIG. Cross section of sorting device Explanatory drawing of shot blasting action by abrasive grains

[Embodiment 1]
Embodiment 1 of the present invention will be described in detail below with reference to the drawings.
In this example, the granular material is an aggregate, and a form in which recycled aggregate is produced from a raw material containing aggregate will be described.

<1> Overview of Production Plant for Granular Substances Referring to FIG. 1, a production plant for particulate matter includes a grinding device 10 that produces recycled aggregates from a raw material A containing aggregates, and the grinding device 10. And a sorting device 50 that sorts the recycled aggregate according to the particle size.

The raw material A used for the production of recycled aggregate is obtained by crushing concrete waste and asphalt generated at various sites to a size of 100 mm or less (preferably 40 mm to 0 mm) with a known crusher. Deposits such as mortar adhere to the surface of the material and fine aggregate.
The main devices are described in detail below.

<2> Grinding device The grinding device 10 is a device that removes deposits such as mortar attached to the surface by shot blasting without destroying the aggregate, and is a blast rotor that rotates in one direction around a horizontal rotation shaft. 20, a cylindrical rotary sorter 30 that accommodates the blast rotor 20 therein and rotates in the opposite direction or the same direction as the blast rotor 20 around a horizontal virtual rotation axis, and a cover 40 that covers these It comprises.
Although FIG. 1 illustrates the case where the blast rotor 20 and the rotary sorter 30 rotate horizontally, the case where the blast rotor 20 and the rotary sorter 30 rotate slightly tilted with respect to the horizontal is also included.

As shown in FIGS. 1 and 2, the rotation center O ₂ of the blast rotor 20 is arranged eccentrically upward with respect to the rotation center O ₁ of the rotary sorter 30.
The reason why the rotation center O ₂ of the blast rotor 20 is eccentric is to secure a wider grinding space S below the rotary sorter 30.
In addition, when the diameter difference of the blast rotor 20 and the rotation sorter 30 is large, you may arrange | position both 20 and 30 on the same line, without decentering.

<2.1> Blast Rotor The blast rotor 20 is a horizontal rotary drum that discharges hard abrasive grains B by centrifugal force.
Referring to FIGS. 3 and 4, the blast rotor 20 is formed in a drum shape by being surrounded by a substrate 21 and a top plate 22 and a peripheral plate 23 connecting their peripheral portions. It is also possible to substitute a rotating rotor constituting the centrifugal crusher.

  A rotating shaft 24 is fixed to the center of the top plate 22, and the blast rotor 20 rotates integrally by rotating the rotating shaft 24 in response to the rotation of a driving source (motor or the like) (not shown).

The blast rotor 20 has a supply port 25 formed at the center of the top plate 22, and the end of the fixed tube 13 constituting the abrasive grain supply system L ₂ is guided to the supply port 25.
The abrasive grains B are supplied to the inside of the blast rotor 20 through the pipe 13, and the abrasive grains B that have received the rotational centrifugal force of the blast rotor 20 have a high speed outward through a plurality of discharge ports 26 formed on the peripheral surface of the blast rotor 20. Can be released.

  As shown in FIG. 2, when it is configured so that the abrasive grains B can be discharged toward the raw material A located in the limited effective range θ in the rotary sorter 30, the loss of shot blasting is avoided and the rotary sorting is performed. Damage to the machine 30 can be avoided.

In order to release the abrasive grains B within a limited effective range θ of the rotary sorter 30, for example, as shown in FIGS. 3 and 4, a portion formed on the side surface of the end portion of the tube 13 guided into the blast rotor 20 This is possible by discharging the abrasive grains B into the blast rotor 20 through the discharge port 14.
By appropriately selecting the opening degree of the partial discharge port 14, the discharge range of the abrasive grains B toward the raw material A located in the rotary sorter 30 is adjusted through a plurality of discharge ports 26 formed on the peripheral surface of the blast rotor 20. can do.

  Note that the limited effective range θ is not limited to the lower half in the rotary sorter 30 illustrated in FIG. 2, and can be set as appropriate. The blast rotor 20 may be configured to release the abrasive grains B within a range of 360 degrees.

<2.2> Rotary sorter Referring to FIGS. 1 and 2, the rotary sorter 30 is a device for sorting the raw material A while grinding in cooperation with the blast rotor 20, and has a peripheral surface opened. The structure includes a rotating cylinder 31 having both ends open type and a driving means for rotationally driving the rotating cylinder 31. For example, a known trommel can be used.
A roller 32 that rotates under the drive of a motor (not shown) supports the outer periphery of both sides of the rotating cylinder 31 that is placed horizontally. The rotating cylinder 31 receives a drive of the roller 3 and is centered around a horizontal virtual rotating shaft. Rotate in direction or forward / reverse direction.
An opening group of, for example, 5 mm is formed on the peripheral surface of the rotary cylinder 31 so that the raw material A charged into the rotary cylinder 31 can be screened. That is, the rotary cylinder 31 permeates the raw material A having a size smaller than 5 mm and the abrasive grains B, and the raw material A having a size larger than 5 mm remains.

<2.3> Cover The outer side of the rotary sorter 30 containing the blast rotor 20 is covered with a cover 40 to prevent the raw material A and abrasive grains B from being scattered outside.
Below the rotary sorter 30, a part of the cover 40 is formed in a funnel shape to form a collection hopper 41.
The cover 40 is not essential and may be omitted.

<3> Sorting device Referring to FIGS. 1 and 5, the sorting device 50 is a device for sorting the regenerated aggregate produced by the grinding device 10 according to size, and a rotation provided adjacent to the grinding device 10. A sorter 60, a cover 70 that covers the rotary sorter 60, and a dust collector 80 that sucks and collects dust generated in the rotary sorter 60 are provided.

  In this example, the case where the aggregate is sorted by size with the cylindrical rotary sorter 60 will be described, but a known sorter such as a vibrating screen or an air classifier may be applied instead of the rotary sorter 60. Good.

<3.1> Rotating Sorter The rotating sorter 60 is a device for sorting recycled aggregates according to size. The rotating cylinder 61 is open at both ends and has an open structure on the peripheral surface, and the rotating cylinder 61 is driven to rotate. For example, a known trommel can be used.
A roller 62 that rotates under the driving of a motor (not shown) supports the outer circumferences of both sides of the rotating cylinder 61 that is placed horizontally. The rotating cylinder 61 receives the driving of the roller 62 and is centered around a horizontal virtual rotating shaft. Rotate in the direction.

A plurality of types of opening groups having different dimensions are formed on the peripheral surface of the rotating cylinder 61, and the recycled aggregate put into the rotating cylinder 61 can be sieved within a predetermined size range.
That is, the mesh size of the peripheral surface of the rotating cylinder 61 is formed so as to increase stepwise from the side closer to the sorting device 50 toward the side away from it. In this example, for example, the rotary cylinder 61 has three types of selection: a fine grain size (13 mm to 5 mm) area E ₁ , a medium grain size (20 mm to 13 mm) area E ₂ , and a coarse grain size (40 mm to 20 mm) area E _3. Although the area is formed, the number of the selection areas is appropriately selected and determined.

<3.2> Cover The outer side of the rotary sorter 60 is covered with a cover 70 to prevent respread aggregate from being scattered outside.
Below the rotary sorter 60, a part of the cover 70 is formed in a funnel shape to form collection hoppers 71-73. The collection hoppers 71 to 73 are for sorting and collecting the recycled aggregates selected in the respective selection areas E _{1 to} E ₃ .

<3.3> Dust Collector The dust collector 80 has a negative pressure suction facility, and floats such as fine powder and dust that float in the rotary sorter 60 through a pipe 81 connecting the rotary sorter 60 and the dust collector 80. Can be collected by suction.

<4> Supply System In FIG. 1, the grinding apparatus 10 is a polishing that supplies the abrasive grains B from the hopper 12 to the blast rotor 20 and the raw material supply system L ₁ that supplies the raw material A from the hopper 11 into the rotary sorter 30. Grain supply system L ₂ , reflux system L ₃ for supplying a part of the regenerated fine aggregate (regenerated sand) selected by the rotary sorting device 30 as abrasive grains B to the abrasive grain supply system L ₂ , and raw material supply system An initial abrasive grain supply system L ₄ for supplying a part of the raw material A as abrasive grains B to the abrasive grain supply system L ₂ is provided to switch between L ₁ and the abrasive grain supply system L _2. ing.

<4.1> Raw Material Supply System The raw material supply system L ₁ is a system that supplies a crushed material obtained by crushing concrete glass to a size of 40 mm or less into the rotary sorter 30 with a known crusher.
The crushed concrete glass contains coarse aggregate and fine aggregate as raw materials for recycled aggregate, and deposits are removed by shot blasting from the blast rotor 20 in the rotary sorter 30.

<4.2> Supply System for Abrasive Grains The abrasive grain supply system L ₂ is a system for continuously supplying the abrasive grains B from the hopper 12 toward the blast rotor 20.

In the initial abrasive grain supply system L ₄ , immediately after the operation of the grinding apparatus 10 in which the abrasive grains B are not stored in the hopper 12, a part of the raw material A in the hopper 11 is used as the abrasive grains B and the abrasive grain supply system L is temporarily supplied line towards _2, the supply of the raw material a to the abrasive supply system L ₂ through the initial abrasive supply system L ₄ are when the abrasive particles B of a predetermined amount into hopper 12 stored To stop.

<4.3> Reflux system The reflux system L ₃ is a system that takes out a part of the recycled aggregate selected by the rotary sorter 30 and supplies the abrasive grains B toward the blast rotor 20.
Of the recycled aggregate selected by the rotary sorter 30, a portion of the recycled fine aggregate (regenerated sand) suitable for polishing can be returned to the hopper 12.

[Production method of recycled aggregate]
Next, a method for producing recycled aggregate will be described.

<1> Grinding process In FIG. 1, the raw material A crushed to 40 mm or less, for example, is supplied to the grinding space S in the rotary sorter 30 constituting the grinding device 10 through the raw material supply system L _1. To do. In parallel with the supply of raw material A, it starts supplying the abrasive particles B toward the hopper 12 through the abrasive particle supply system L ₂ to the blast rotor 20.
Hereinafter, a method for producing the recycled aggregate C by removing the deposits of the raw material A will be described in detail.

<1.1> Sorting and staying of crushed material in a rotary sorter In FIGS. 1 and 2, the raw material A supplied into the rotary sorter 30 is rotated by a rotating cylinder 31 that rotates in one direction under the driving of a roller 32. Under the influence of the force, it spreads and stays in layers inside the rotary cylinder 31.
As the raw material A rolls along with the rotation of the rotating cylinder 31, a part of the raw material A having a weak binding force is separated into small pieces.

<1.2> Shot Blasting with Abrasive Grains In FIG. 2, when the abrasive grains B are supplied to the central portion of the rotating blast rotor 20 through the abrasive grain supply system L ₂ , the abrasive grains B generate the rotational centrifugal force of the blast rotor 20. In response, the blast rotor 20 is discharged at a high speed from the side of the blast rotor 20 toward the entire range (limited effective range θ) of the raw material A that spreads and stays in layers in the rotary cylinder 31.

The abrasive grains B are sprayed at high speed toward the raw material A that rolls in the rotary cylinder 31, so that efficient crushing and grinding progress, and fine recycled aggregates and coarse recycled aggregates from the raw material A. Is produced.
Since the shot blasting with the abrasive grains B is performed on the entire raw material A that continues to stay in a thinly spread state along the inner peripheral surface of the rotary cylinder 31 of the rotary sorter 30, the deposits such as mortar components are efficiently used. Can be removed in a short time.
The shot blasting time is appropriately selected while confirming the grinding state of the raw material A.

  The broken mortar component, some fine recycled aggregates, and abrasive grains B pass through the peripheral surface of the rotating cylinder 31 and fall by its own weight, and are coarse particles having a size larger than the opening on the peripheral surface of the rotating cylinder 31. The recycled aggregate remains in the rotating cylinder 31.

6 (a) to 6 (c) show the grinding action by the abrasive grains B, and the raw material A includes coarse aggregate c1 such as gravel and fine aggregate c2 such as sand. When the abrasive grains B collide with A, the mortar component is broken and separated into small pieces.
Due to the grinding action of the abrasive grains B, deposits such as mortar components adhering to the surface of the separated pieces are efficiently removed in a short time to produce coarse aggregate c1 and fine aggregate c2 having no deposits. Is done.

If the raw materials A collide with each other at high speed, the probability that the aggregate itself is crushed and fragmented increases, but if the abrasive grains B with a small mass (diameter) collide with the raw material A with a large mass (diameter), Recycled aggregate will not be crushed more than necessary.
Therefore, the production efficiency of recycled aggregates (coarse aggregate c1) of 5 mm or more is improved, and the problem of mass generation of powdered waste can be avoided by avoiding powdered recycled aggregates.

<2> Recycled Aggregate Sorting Process In FIGS. 1 and 5, all the regenerated aggregate remaining after grinding by the grinding device 10 is moved to the sorting device 50, and the recycled aggregate is removed by the sorting device 50. Sort by size.
In this example, the sorting device 50 sorts the recycled aggregate into three types: fine grain size (for example, 13 mm to 5 mm), medium grain size (for example, 20 mm to 13 mm), and coarse grain size (for example, 40 mm to 20 mm). The form is shown.

As a method of transferring the recycled aggregate from the grinding device 10 to the sorting device 50, spiral blades are formed on the inner peripheral surface of the rotating cylinder 31 constituting the grinding device 10, and the raw material is polished for each batch. After crushing, the revolving aggregate 31 can be reversed and the recycled aggregate can be transferred to the sorting device 50 or conveyed through various known conveyors interposed between the grinding device 10 and the sorting device 50.
The means for conveying the recycled aggregate from the grinding device 10 to the sorting device 50 is not particularly limited.

Floating matter such as fine powder and dust is floating in the rotating cylinder 61 of the sorting device 50.
These floating substances are sucked and collected by the dust collector 80 through the pipe 81.

<3> Reflux of abrasive grains In FIG. 1, a part of the regenerated aggregate (regenerated sand) of less than 5 mm separated by the grinding device 10 is recirculated to the hopper 12 through the recirculation system L ₃ to continuously polish the abrasive grains. Use as B.
By using a part of the recycled aggregate (recycled sand) as the abrasive grains B, the abrasive grains B themselves are polished and become high-quality recycled aggregate (recycled sand).
Part of the recycled aggregate (recycled sand) separated and recovered in this way can be continuously reused as shot material, so there is no need to prepare a dedicated hard shot material, and the abrasive grains B are recycled aggregate (regenerated) Sand) itself, it is not necessary to finally separate and recover only the abrasive grains B.

[Embodiment 2]
In the first embodiment, the form in which the dust collector 80 is attached to the sorting device 50 has been described. However, the dust collector 80 is attached to the grinding device 10, and the fine powder and dust that float in the rotary sorter 30 constituting the grinding device 10 It is also possible to suck and collect floating matters such as.

[Embodiment 3]
The sorting device 50 is not limited to a dry type, and may be a wet type.
In order to make the sorting device 50 wet, for example, a known watering facility is additionally provided inside the rotary sorter 60 to spray the particulate matter inside, or the bottom of the rotary sorter 60 is submerged to water the particulate matter. According to a known method such as soaking in.
Depending on the type of particulate material, dry or wet is properly used.

[Embodiment 4]
In the above description, the granular material is aggregate, and the form of producing recycled aggregate from the raw material including the aggregate has been described. However, it is also possible to target concrete gravel and contaminated soil contaminated with the granular material.

  In the present embodiment, the contaminated concrete glass is crushed to a size of a predetermined size or less (for example, 40 mm to 0 mm) with a known crusher, or the grinding apparatus 10 is rotated using the contaminated soil as a raw material A. While supplying toward the grinding space S in the sorting apparatus 30, the abrasive grain B is sprayed from the blast rotor 20 into the grinding space S at high speed.

When contaminated granular material such as contaminated concrete glass or contaminated soil is used as the raw material A, the contaminant on the surface of the granular material is polished by shot blasting the abrasive particles B against the contaminated granular material. It can be crushed and efficiently decontaminated.
The contaminant integrated with the dust floats in the space of the sealing device 50 having a sealed structure, but is sucked and collected by the dust collector 80 through the pipe 81.

L ₁ ... Raw material supply system L ₂ ... Abrasive grain supply system L ₃ ... Recirculation system L ₄ ... Initial abrasive grain supply system A ... Raw material B ··· Abrasive grain 10 ··· Grinding device 11 ··· Raw material hopper 12 · · · Abrasive grain hopper 20 ··· Blast rotor 24 ··· ... Rotary shaft 26 ... Discharge port 30 ... Rotary sorter 31 ... Rotating cylinder 32 ... Roller 40 ... Cover 50 ... Sorting device 60 ... Rotating sorter 61 ... Rotating cylinder 62 ... Roller 70 ... Cover

The present invention relates to a grinding apparatus for particulate material to produce particulate matter from a raw material containing a particulate material, and blasting the rotor to release the abrasive centrifugal force you rotate around a horizontal axis of rotation, sideways virtual A rotary sorter that rotates about the rotation axis of the rotary sorter and rotatably accommodates the blast rotor, a raw material supply system that feeds a raw material containing particulate matter into the rotary sorter, and supplies abrasive grains to the blast rotor Abrasive grain supply system is provided, the abrasive grains are discharged from the blast rotor toward the raw material of the particulate matter staying in the rotary sorter and shot blasted , and the raw material ground by the rotary sorter is selected . It is characterized by.
In the present invention, a reflux system may be further included, and a part of the granular material selected by the rotary sorter through the reflux system may be supplied as abrasive grains to the abrasive grain supply system.
Furthermore, in the present invention, a dust collector may be further included, and the dust collector may be configured to suck and collect floating matters such as fine powder and dust that float in the rotary sorter.
Furthermore, in the present invention, the end portion of the pipe guided into the blast rotor can be discharged so that the blast rotor can discharge abrasive particles toward the raw material containing the particulate matter located in a limited effective range in the rotary sorter. You may comprise so that an abrasive grain may be discharge | released in a blast rotor through the partial discharge port formed in the side surface.
Furthermore, the present invention is a granular material production plant for producing a granular material from a raw material containing the granular material, wherein a recycled aggregate sorting device is arranged adjacent to any of the granular material grinding devices described above. It is characterized by.
Furthermore, in the present invention, the sorting device may further include a dust collector, and the dust collector may be configured to suck and collect floating matters such as fine powder and dust that flow into the sorting device.

The present invention is an apparatus for grinding a particulate material that produces particulate material from a raw material containing the particulate material, and a blast rotor that discharges abrasive particles of the same quality as the particulate material by a centrifugal force that rotates about a horizontal rotation shaft; A rotary sorter that rotates about a horizontal virtual rotating shaft and rotatably accommodates the blast rotor, a raw material supply system that feeds a raw material containing particulate matter into the rotary sorter, and polishing to the blast rotor A raw material that is provided with an abrasive grain supply system for supplying grains, discharges abrasive grains from a blast rotor toward the raw material of the particulate matter staying in the rotary sorter, and is shot blasted and ground by the rotary sorter It is characterized by sorting.
In the present invention, a reflux system may be further included, and a part of the granular material selected by the rotary sorter through the reflux system may be supplied as abrasive grains to the abrasive grain supply system.
Furthermore, in the present invention, a dust collector may be further included, and the dust collector may be configured to suck and collect floating matters such as fine powder and dust that float in the rotary sorter.
Furthermore, in the present invention, the end portion of the pipe guided into the blast rotor can be discharged so that the blast rotor can discharge abrasive particles toward the raw material containing the particulate matter located in a limited effective range in the rotary sorter. You may comprise so that an abrasive grain may be discharge | released in a blast rotor through the partial discharge port formed in the side surface.
Furthermore, the present invention is a granular material production plant for producing a granular material from a raw material containing the granular material, wherein a recycled aggregate sorting device is arranged adjacent to any of the granular material grinding devices described above. It is characterized by.
Furthermore, in the present invention, the sorting device may further include a dust collector, and the dust collector may be configured to suck and collect floating matters such as fine powder and dust that flow into the sorting device.

Claims (7)

A granular material grinding device for producing a granular material from a raw material containing the granular material,
A blast rotor that releases abrasive grains by centrifugal force due to rotation;
A rotary sorter that rotatably accommodates the blast rotor;
A raw material supply system for supplying a raw material containing particulate matter into the rotary sorter;
Abrasive grain supply system for supplying abrasive grains to the blast rotor,
It is characterized by shot blasting by discharging abrasive grains from a blast rotor toward the raw material of the granular material staying in the rotary sorter,
Granular material grinding equipment.   The particulate material grinding according to claim 1, further comprising a reflux system, wherein a part of the particulate material selected by the rotary sorter through the reflux system is supplied to the abrasive grain supply system as abrasive grains. apparatus.   3. The granular material grinding apparatus according to claim 1 or 2, further comprising a dust collector, wherein the dust collector sucks and collects a suspended matter such as fine powder and dust floating in the rotary sorter.   The blast rotor according to any one of claims 1 to 3, wherein the blast rotor can release abrasive grains toward a raw material containing particulate matter located in a limited effective range in a rotary sorter. An apparatus for grinding granular material, characterized in that abrasive particles are discharged into a blast rotor through a partial discharge port formed on a side surface of a terminal end portion of a guided tube. A particulate matter production plant for producing particulate matter from a raw material containing particulate matter,
Recycled aggregate sorting device is disposed adjacent to the particulate material grinding device according to any one of claims 1 to 4.
Production plant for particulate matter.   6. The particulate matter production plant according to claim 5, wherein the sorting device is a rotary sorter.   6. The particulate matter production plant according to claim 5, wherein the sorting device further includes a dust collector, and the dust collector sucks and collects suspended matter such as fine powder and dust that flies in the sorting device.

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