KR101956741B1 - Method of Sand Manufacturing using Aggregate Crushing Materials - Google Patents

Abstract

The present invention relates to a sand preparing method using a ground waste aggregate material for preparing high quality sand by grinding the waste aggregate material and mixing the ground waste aggregate material at a predetermined ratio in accordance with particle sizes. According to the present invention, the sand preparing method using a ground waste aggregate material includes: a first-stage grinding step of using a first-stage grinder to grind a waste aggregate material; a metal removal step of using a metal remover to remove metal substances from the ground waste aggregate material from the first-stage grinding step; an impregnating step of impregnating the waste aggregate material having the metal substances removed in the metal removal step in an impregnation tank for a predetermined period; a second-stage grinding step of supplying the waste aggregate material impregnated in the impregnation step to a second-stage grinder and grinding the same; a particle sorting and discharging step of sorting and discharging the waste aggregate material ground for the second time in the second-stage grinding step in a particle sorter in accordance with the particle size; and a mixture step of inputting the ground particles with different particle sizes after being separated and discharged in the particle sorting and discharging step to a mixer and mixing the same at a predetermined ratio.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an aggregate crushing material,

The present invention relates to a method of manufacturing sand using aggregate disruption, and more particularly, to a method of manufacturing sand using aggregate disintegration to produce sand by crushing waste concrete or crushing fine aggregate (hereinafter referred to as " waste aggregate " And a method for manufacturing sand.

Generally, natural sand has been collected from rivers and oceans. However, as the resources for collecting the sand gradually become depleted and environmental problems are recognized, a method of crushing concrete and aggregate finely to reuse sand has been developed .

As a prior art of the above-described method for manufacturing sand, JP-A-0393845 discloses a method for manufacturing sand using waste concrete and recycled aggregate, and an apparatus therefor (hereinafter referred to as patent document).

The sand production method disclosed in the above patent document is a method of manufacturing sand, in which waste concrete and recycled aggregate are fed into a hopper by a conveyor; A primary metal separation process in which the supplied raw material is separated by a magnetic separator; The particles are sorted by particle size, and then the particles are transferred to the primary metal separation process through the foreign matter removal process for separating the foreign substances according to the specific gravity by the wind force and the crushing process for crushing the particles by the high speed rotary conch crusher. Size particles or unevenly distributed particles are transferred to a primary metal separation process through a grain refinement process in which the particles are partially crushed and polished by a grain improvement sand crusher and the good particles are transferred to a sand separator; A sand screening process for separating sand particles and wastewater using the difference between sedimentation velocity and flow velocity of particles; A dewatering process for removing moisture through the dewatering screen in the sand separated in the sand screening process; And a sediment treatment process in which the separated wastewater is primarily stored in the sand sorting process, and the medicines are added and stirred to separate and store the precipitated sludge.

However, it is difficult to produce sand having various particle sizes in the conventional sand production method as described above, and therefore it is difficult to manufacture sand separately according to the required particle size.

Therefore, it is required to develop a sand production method capable of simultaneously producing sand having a high quality and having a particle size within a predetermined range, while mixing sand having different particle sizes at a predetermined ratio.

KR 10-2002-0082982 A (2002. 11. 01.) KR 10-0390744 B1 (June 27, 2003) KR 10-0507705 B1 (2005. 08. 03.) KR 10-0393845 B1 (Jul. 24, 2003)

SUMMARY OF THE INVENTION Accordingly, the present invention has been made in an effort to solve the problems of the conventional sand making method as described above, and it is an object of the present invention to provide a sand making method, And to provide a method for manufacturing sand using the aggregate material which can be manufactured.

According to another aspect of the present invention, there is provided a method of manufacturing sand using aggregate material, comprising the steps of: a primary crushing step of crushing waste aggregate using a primary crusher; A metal removing step of removing metal material from the crushed waste aggregate in the primary crushing step using a metal remover; Impregnating the waste aggregate from which the metal material has been removed in the metal removal step into the impregnation tank and impregnating the waste aggregate for a predetermined time; A second crushing step of crushing the pulverized aggregate impregnated in the impregnating step by supplying the pulverized aggregate to a secondary crusher; A particle sorting and discharging step of sorting the waste agglomerated secondary pulverized in the secondary pulverizing step into a particle sorter according to the particle size and discharging it separately; And a mixing step of mixing and mixing particles of fine particles having different particle sizes separated and discharged in the particle sorting and discharging step into a mixer at a predetermined ratio, and the particle sorter of the particle sorting and discharging step comprises a structure frame; A first screen having one end inclined downward at a predetermined angle to the structural frame; A second screen installed below the first screen with a predetermined distance therebetween and having one end inclined downward at a predetermined angle; A third screen installed at a predetermined distance below the second screen and having one end inclined downward at a predetermined angle; First, second and third discharge passages respectively connected to lower ends of the first, second and third screens; And a collector for collecting fine particulate aggregate discharged through the third screen while being spaced apart from the bottom surface of the third screen by a predetermined distance and the waste aggregate discharged through the first discharge passage is discharged to the secondary crushing stage And the particulate waste aggregate discharged through the second and third discharge passages and the collection box are separated and supplied to the mixing stage, respectively.

The present invention is characterized in that the primary crusher of the primary crushing stage has a cylindrical drum body having an inlet and an outlet for injecting and discharging waste aggregate into the inside with a predetermined length horizontally; A support table rotatably supporting both ends of the drum body; A driving member for rotationally driving the drum body; And a swinging member for swinging the drum body to the left and right, wherein the pulverized aggregate charged into the drum body is crushed by a plurality of impacts against each other due to rotation and lateral swinging.

Further, according to the present invention, in the primary crushing step, pulverization of the waste aggregate proceeds in a state where water of a predetermined amount is injected into the drum body, and after the primary pulverization of the waste aggregate is completed, Characterized in that a small particle-size particle which is supplied and discharged together with water is precipitated and separated, and then the separated particle particle is supplied to the particle sorting and discharging step.

In addition, the present invention is characterized in that 35 to 45% by weight of the fine particulate matter discharged through the second discharge passage into the mixer in the mixing step, 35 to 45% by weight of the fine particulate matter discharged through the third discharge passage, 10 to 30% by weight of the fine particulate material is added, mixed for a predetermined time, and then discharged.

The present invention also relates to a method for preparing a mixture comprising 10 to 15% by weight of particulate matter to be discharged through the second discharge passage into the mixer in the mixing step, 20 to 25% by weight of particulate matter to be discharged through the third discharge passage, 60 to 70% by weight of the particulate crushed material is added, mixed for a predetermined time, and then discharged.

According to the present invention, it is possible to simultaneously produce various kinds of sand having different particle sizes, and also to mix sand having different particle sizes at a predetermined ratio to easily produce sand having a relatively wide particle size range There is an advantage.

1 is a flowchart showing an example of a method for manufacturing sand using aggregate disintegration according to the present invention.
FIG. 2 is a view showing an example of a method for manufacturing sand using the aggregate material according to the present invention. FIG.
3 is a view showing an example of a primary crusher according to the present invention.
4 is an exploded view showing an example in which a primary crusher according to the present invention is used.
5 is a view showing an example of a metal remover according to the present invention.
6 is a view showing an example of a secondary crusher according to the present invention.
7 and 8 are views showing an example of a particle sorter according to the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The present invention is to provide a method for manufacturing sand using an aggregate material which is capable of producing sand having high quality by crushing waste aggregate and then mixing the same at a predetermined ratio by particle size. A metal removal step S20, an impregnation step S30, a secondary crushing step S40, a particle sorting and discharging step S50, and a mixing step S60.

(1) Primary crushing step (S10)

In this step, the waste aggregate is firstly crushed to a predetermined size by supplying the crushed aggregate to the primary crusher 10, and the primary crusher 10 of the primary crushing step S10 for this purpose is, as shown in FIG. 3, A tubular drum body 11 having a predetermined length and having an inlet and an outlet 11A formed therein so as to allow the waste aggregate to be inserted into and discharged from the drum body 11; a support base 12 rotatably supporting both ends of the drum body 11; A driving member 13 for rotating the drum main body 11 and a swing member 14 for swinging the drum main body 11 to the left and right.

After the predetermined amount of waste aggregate and water have been introduced through the inlet and outlet opening 11A of the drum body 11 by the construction of the primary crusher 10 as described above, the drum body 11 is driven by the driving member 13, The rotary member 14 is rotated about the imaginary center axis of the main body 11 and at the same time the drum main body 11 is rotated about the central portions on both sides of the drum main body 11 as shown in Fig. ) Are repeatedly inverted (± 120 ° or 360 °) while the first and second crushing steps are performed.

The pulverized aggregate charged into the drum body 11 by the primary crusher 10 is crushed by crushing and crushing the pulverized aggregate appropriately.

When the pulverized aggregate is crushed so as to have a small particle size of 2 mm or less in the secondary crusher 40 to be described later, So that the secondary crusher 40 is prevented from being damaged or broken down.

2, the water introduced into the drum body 11 is supplied to the precipitation separation tank 15 and stored for a predetermined time, as shown in FIG. 2, The crushed material finely crushed so as to be mixed with water and discharged together with water is separated from water without the metal removing step (S20) and the impregnating step (S30) to be described later, and then the secondary crusher 40 to be crushed to have a predetermined particle size, whereby sand having a predetermined particle size can be produced more quickly and efficiently.

At this time, foreign matter such as plastic, paper, and wood floating in the water together with the crushed waste aggregate having a small particle size is stored in the sediment separating tank 15, so that the foreign substances contained in the waste aggregate are separated, The settling separation tank 15 may have a water tank having various structures in which water can be stored for a predetermined time.

The pulverized aggregate remaining in the drum main body 11 is conveyed to the conveying conveyor 21 of the metal remover 20 by the pulverizing means 20, .

(2) Metal removal step (S20)

This step is to remove the metal material contained in the crushed aggregate material in the primary crushing step S10. The metal remover 20 for this purpose removes the metal material from the conveying conveyor 21, And an electromagnet 22 for generating a strong magnetic force at a predetermined interval on the upper side of the conveying conveyor 21. [

By the construction of the metal remover 20 as described above, the metal material conveyed together with the waste aggregate conveyed along the conveying conveyor 21 is attached to the electromagnet 22 and separated from the waste aggregate.

(3) Impregnation step (S30)

In this step, after the metal contained in the waste aggregate is removed through the metal removing step (S20), the waste aggregate is impregnated with water for a predetermined period of time so that the mortar component contained in the waste concrete can be easily separated, The impregnation tank 30 in the impregnation step S30 is a cylindrical or square water tank having a predetermined size and is made of a porous material having a predetermined size so as to increase the water content of the aggregate and to make the waste aggregate more easily broken in the secondary crushing step S40 .

A conveying conveyor (not shown) is installed in the upper portion of the impregnation tank 30 to feed the waste aggregate. A discharge conveyor (not shown) for discharging waste aggregate impregnated into the bottom of the impregnation tank 30 Is installed.

(4) Second crushing step (S40)

In this step, pulverized aggregate impregnated in the impregnation step (S30) for a predetermined time is supplied to crush the waste aggregate so as to have a predetermined particle size, and the secondary crusher (40) for this purpose crushes the cylindrical aggregate A pair of primary crushing rollers 41 having a pair of primary crushing rollers 41 and a pair of primary crushing rollers 41, And a crushing roller (42).

At this time, a primary crushing product having a particle size of about 5 to 10 mm is formed through the primary crushing roller 41, and the primary crushing product is passed through the secondary crushing roller 42 to a secondary It is made of crushed material.

As described above, since the waste aggregate is crushed in multiple stages using the primary and secondary crushing rollers 41 and 42 of the secondary crusher 40, the load of the crusher for crushing the waste aggregate to the target particle size at a time can be reduced As a result, failure such as breakage of the secondary caster 40 is reduced.

The waste aggregate crushed by the secondary crusher 40 into fine particles is supplied to a particle sorting and discharging step S50 to be described later, and the particle sorting process proceeds.

(5) Particle sorting and discharging step (S50)

The particle separator 50 for this purpose separates the waste agglomerates crushed into fine particles of 2 mm or less through the secondary crushing step S40, A first screen (52) having one end inclined downward at a predetermined angle to the structure frame; a first screen (52) spaced apart from the first screen (52) A third screen 54 installed at a predetermined distance below the second screen 53 and having one end inclined downward at a predetermined angle; First, second and third discharge passages 55, 56 and 57 connected to the lower ends of the first, second and third screens 52, 53 and 54, 3 collecting particulate waste aggregate discharged through the screen 54 It includes a collection box (58).

At this time, even if the waste aggregate is crushed into fine particles having a size of 2 mm or less by the secondary crusher 40, it can be produced with the particulate waste aggregate having a particle size exceeding 2 mm, The screen mesh screen size of the first screen 52 is set to be 2 mm or 2 mm to 2.2 mm so that the particulate waste aggregate is selected through the first screen 52 and re-supplied to the secondary crusher 40 Whereby the particulate waste aggregate which can not pass through the first screen 52 is collected separately through the first discharge passage 55 and the particulate waste aggregate collected separately through the first discharge passage 55 is separated And then re-supplied to the secondary crusher 40 in the crushing step S40.

And the second screen 53 is made to have a screen mesh size of 1.5 mm or 1.3 to 1.5 mm in size so that the first screen 52 passes through the second screen 53, Aggregate is collected separately through the second discharge passage (56).

In addition, the third screen 54 is formed with a screen mesh size of 1 mm or a size ranging from 1 to 1.2 mm, whereby the second screen 53 passes the third screen 53, The waste aggregate is collected separately through the third discharge passage (57).

In addition, the particulate waste aggregate passing through the third screen 54 is collected in the collection box 58 and then mixed with the particulate waste aggregate discharged through the second and third discharge passages 56, 57 (S60 To the mixer (60).

On the other hand, the first, second and third screens 52, 53 and 54 are provided with installation frames 51A and 51B formed in a "C" shape so as to insert a screen frame (not shown) So that it is possible to change the selected particle size by changing the screen nets separately or by changing the eye size of the screen nets.

The mounting frames 51A and 51B are provided with fixing bolts B for fixing the screen net inserted along the length so that the screen net is not displaced arbitrarily. The mounting frames 51A and 51B apply vibration to the screen net A vibration generator 59 may be installed to facilitate the screening operation using the screen network.

(6) Mixing step (S60)

In this step, the particulate waste aggregate separated and collected according to the particle size in the particle sorting and discharging step (S50) is mixed with the particulate waste aggregate collected at a predetermined ratio as necessary to make sand having a particle size within a predetermined range. (Not shown), which is rotated by a driving member (not shown) such as a motor, and a blade (not shown) for stirring the sand on the rotating shaft, A mixer of various known structures.

Hereinafter, an embodiment will be described in which sand is produced by mixing particulate waste aggregate particles by a mixer 60.

≪ Example 1 >

Example 1 was prepared by mixing 35 to 45 wt.% Of particulate matter pulverized by the mixer 60 through the second discharge passage 56, 35 to 45 wt.% Of particulate matter pulverized through the third discharge passage 57, ), And the mixture is mixed for a predetermined time. The sand produced by this mixing contains a relatively large amount of fine particle sand of 1 mm or less, so that the feel is smooth and the gap between the particles is very small Waterproofing materials and cement.

≪ Example 2 >

The second embodiment is characterized in that 10 to 15% by weight of the particulate disruption discharged through the second discharge passage 56 into the mixer 60, 20 to 25% by weight of the particulate disruption discharged through the third discharge passage 57, ) Are mixed and mixed for a predetermined time, and the sand produced by this mixing contains a relatively large amount of fine particle sand of 1 mm or more, so that the feel is rough and the gap between the particles is wide, There are good features.

As described above, according to the present invention, it is possible to simultaneously produce various sands having different particle sizes, and to mix sand having different particle sizes at a predetermined ratio to easily produce sand having a relatively wide particle size range .

Although the preferred embodiments of the present invention have been disclosed for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims. It is to be understood that the scope of the present invention should not be construed as being limited only by the appended claims and should not be construed as limiting the scope of the present invention to those of ordinary skill in the art. It will be very self-evident.

10: primary crusher 11: drum body
11A: inlet / outlet 12: support
13: driving member 14: pivotal member
15: Precipitation separator 20: Metal eliminator
21: conveying conveyor 22: electromagnet
30: Impregnation tank 40: Secondary crusher
41: primary crushing roller 42: secondary crushing roller
50: particle sorter 51: structural frame
51A, 51B: mounting bracket 52: first screen
53: second screen 54: third screen
55: first discharge passage 56: second discharge passage
57: Third discharge passage 58: Collection box
59: Vibration generator 60: Mixer
B: Fixed bolt

Claims (5)

A primary crushing step (S10) of crushing waste aggregate by using a primary crusher (10);
A metal removing step (S20) of removing metal material from the crushed aggregate material in the primary crushing step (S10) using the metal remover (20);
An impregnation step (S30) in which the waste aggregate from which the metal material has been removed in the metal removal step (S20) is impregnated into the impregnation tank (30) and impregnated for a predetermined time;
A secondary crushing step (S40) of supplying pulverized aggregate impregnated in the impregnation step (S30) to the secondary crusher (40) and crushing the same;
A particle sorting and discharging step S50 for sorting the waste agglomerated secondary pulverized in the secondary pulverization step S40 into particle sorters 50 according to the particle size and discharging them separately;
A mixing step (S60) in which the particulate matter separated and discharged in the particle sorting and discharging step (S50) and having different particle sizes is put into the mixer (60) at a predetermined ratio and mixed;
Lt; / RTI >
The particle sorter (50) of the particle sorting and discharging step (S50)
A structural frame 51;
A first screen (52) having one end inclined downward at a predetermined angle to the structure frame (51);
A second screen (53) spaced apart from the first screen (52) by a predetermined distance and having one end inclined downward at a predetermined angle;
A third screen 54 installed at a predetermined distance below the second screen 53 and having one end inclined downward at a predetermined angle;
First, second and third discharge passages 55, 56 and 57 connected to the lower ends of the first, second and third screens 52, 53 and 54, respectively; And
A collection box 58 disposed at a predetermined distance from the bottom of the third screen 54 to collect fine particulate aggregate discharged through the third screen 54;
The waste aggregate discharged through the first discharge passage 55 is supplied again to the secondary crushing step S40 and the second and third discharge passages 56 and 57 and the collection box 58 Are separated and supplied to the mixing step S60, respectively,
The primary crusher (10) of the primary crushing step (S10)
A cylindrical drum body 11 having a predetermined length horizontally and having an inlet / outlet 11A formed therein so as to insert and discharge the waste aggregate therein;
A support base 12 for rotatably supporting both ends of the drum main body 11;
A driving member (13) for rotating the drum body (11); And
A swinging member 14 for swinging the drum main body 11 from side to side;
The pulverized aggregate charged into the drum body 11 is crushed while being struck against the pulverized aggregate due to the rotation,
In the primary crushing step (S10)
The pulverized aggregate proceeds in a state where water of a predetermined amount is injected into the drum body 11,
After the primary crushing of the waste aggregate is completed, the used water is supplied to the sedimentation separation tank 15, and the particulate crushed material discharged together with the water is precipitated and separated. Then, the separated particulate crushed material is subjected to the secondary crushing step S40, The method for producing sand using the aggregate disintegration product according to claim 1,
delete delete The method according to claim 1,
In the mixing step (S60)
35 to 45 wt% of particulate matter to be discharged through the second discharge passage 56 to the mixer 60, 35 to 45 wt% of particulate matter to be discharged through the third discharge passage 57, 10 to 30% by weight of the fine particulate matter collected in the step (1) is added, mixed for a predetermined time, and then discharged.
The method according to claim 1,
In the mixing step (S60)
10 to 15 wt% of particulate matter to be discharged through the second discharge passage 56 to the mixer 60, 20 to 25 wt% of particulate matter to be discharged through the third discharge passage 57, By weight of the fine pulverized material collected is mixed with the pulverized pulverized pulp for 60 to 70% by weight for a predetermined period of time and then discharged.

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