KR20210049319A - System for Manufacturing Dry Type Recycled Aggregate by Removing Fine Powder - Google Patents

Abstract

Provided, in the present invention, is a system for manufacturing dry recycled aggregate through removal of fine particles from recycled fine aggregate, wherein fine particles and fine particles of cement components adhering to the surface of aggregates are removed, selects aggregates by size to efficiently remove powder components in the manufacturing of fine recycled aggregates, and manufactures the recycled fine aggregates. The system comprises: an aggregate dryer; an aggregate crusher; a first sorter; an aggregate classifier; a second sorter; and a fine dust collector.

Description

System for Manufacturing Dry Type Recycled Aggregate by Removing Fine Powder}

The present invention relates to a system for manufacturing dry recycled aggregate by removing fine particles of recycled aggregate, and more particularly, powders for the production of recycled fine aggregate by selecting aggregates by size while removing residual particles and fines of cement components adhered to the aggregate surface. It relates to a dry recycled aggregate manufacturing system through the removal of fines from recycled fine aggregates capable of efficiently removing components and producing high quality recycled fine aggregates.

In recent years, in the process of urbanization and industrialization, many various structures such as bridges, roads, and various buildings have been created, and as various structures are gradually aging over time, reconstruction and redevelopment are actively promoted in accordance with the appropriate time.

In the process of dismantling, rebuilding, and redevelopment of these old structures, a large amount of waste concrete and waste soil, which are a kind of construction waste, are generated.If such construction waste is to be reclaimed as it is, it is difficult to secure a landfill site as well as a high reclamation cost. It will have a serious adverse effect on the environment as well.

Accordingly, various measures have been devised in each country to deal with construction waste from the two aspects of recycling resources while protecting the natural environment by solving the shortage of natural aggregates. It is being used by developing a production and manufacturing facility for recycled aggregate.

However, the use of recycled aggregates was avoided due to the lack of technology and awareness on the production and manufacturing of recycled aggregates, and the use of recycled aggregates was avoided due to the durability and other quality of the aggregates. It is a situation that is bringing about.

In this way, the recycled aggregate manufacturing process from recycled waste concrete is divided into wet production process and dry production process according to the medium for improving the quality of the aggregate and sorting out foreign substances contained in the aggregate and aggregate.

However, in the case of producing and manufacturing recycled aggregate using a wet production process, the initial investment cost is too high because additional facilities must be provided due to washing water and sludge treatment, and the cost burden is high, and the environment such as wastewater and sludge containing fine powder. In addition to causing a large amount of pollutants, water treatment in winter was difficult, resulting in a decrease in production utilization rate.

As a prior art that was disclosed to solve the above problems, Korean Patent Publication No. 1523635 (2015.05.21.) discloses a ventilation port through which the circulating aggregate is input and the blower communicates with the air outlet through which the circulating aggregate is input, and fine powder and fine foreign matter are discharged. The main body is formed with a product discharge port through which fine particles are discharged, and a product discharge port through which the circulating fine aggregate is discharged is formed in the lower part, and the circulating aggregate input through the inlet is freely dropped while colliding with each other to peel off the mortar contained in the recycled aggregate. And a blower that is installed in communication with the blower and blows air toward the separation unit to discharge fine powder and fine foreign matter to the fine powder discharge unit, and is installed in communication with the fine powder discharge unit and moves upward by the blowing pressure of the blower. A disk sorting unit for separating and sorting circulating fine aggregates including fine particles and fine foreign matters according to particle size and specific gravity, and a plurality of cyclones collecting and discharging fine powders and fine foreign matters inside the disk sorting unit, and sorting the discs The unit is installed inside the finely divided discharge unit, the separation chamber is formed with inlets on both sides and the discharge port through which the circulating fine aggregate is discharged, and a rotor coupled to a rotation shaft rotatably installed by a driving unit installed on the upper side of the separation chamber. , As a turntable that rotates interlocking with the rotating shaft, and a disk that is stacked in plural at regular intervals on the turntable, the production process and components are simplified compared to the wet method, resulting in excellent space utilization and reduced initial investment cost. A dry circulation fine aggregate production apparatus of an air circulation method is known which can reduce the cost and improve the production operation rate.

In addition, in Registration Patent Publication No. 1296529 (2013.08.07.), in a recycled aggregate manufacturing system that crushes waste asphalt paved on a road with a crusher to be utilized as recycled aggregate, the shredded aggregate crushed in the crusher is meshed. A sorting unit for sorting crushed aggregates by size by allowing a plurality of screens having different sizes of) to pass through in order of size, a transfer conveyor for transporting crushed aggregates selected by size by size by the sorting unit, and the Both ends are opened so that the conveying conveyor passes, and the upper and lower parts and the front and rear surfaces are closed, and a hot air fan that supplies hot air of a predetermined temperature to the crushed aggregate of the inner conveying conveyor is installed to reduce the moisture content of the crushed aggregate, and the conveying Both ends are opened so that the conveyor passes through, and the upper and lower parts and the front and rear surfaces are closed, and a cooling fan that supplies cold air at a predetermined temperature to the crushed aggregate of the inner conveying conveyor is installed to cool the AP oil of the heated crushed aggregate skin. As it is composed of a cooling unit to separate the crushed aggregates bonded to each other by AP oil among the crushed aggregates transferred through the cooling unit, a more systematic particle size management is possible and ascon A system for producing recycled aggregates that can improve the function of is known.

However, in the case of the prior art described above, since it simply relies on pulverization technology to match the size of the recycled aggregate, the abrasion during the pulverization process during aggregate treatment is insufficient, and the residual particles and fine powder of the cement component buried on the surface of the recycled aggregate. There was a problem that this remains, which adversely affects the absorption rate of the recycled aggregate.

In particular, as the quality standard of recycled aggregates for recycled aggregates in 2018 changed from 5 or less to 4 or less for the absorption rate of fine aggregates for concrete, there is an urgent need for improvement to meet the absorption rate of recycled aggregates according to the reinforcement of the quality of fine aggregates for concrete. to be.

KR Registered Patent Publication No. 10-1523635 (2015.05.21.) KR Registered Patent Publication No. 10-1296529 (2013.08.07.)

The present invention is to solve the above problems, and since it is configured to manufacture and produce circulating fine aggregate while stepwise processing the pulverization, sorting, and classification process of aggregate, the removal efficiency of residual particles and fine powder of cement components attached to the aggregate It is to provide a dry recycled aggregate manufacturing system by removing fine particles of recycled fine aggregates capable of producing good quality recycled fine aggregates having an absorption rate of 4 or less, and has an object thereof.

The dry recycled aggregate manufacturing system through the removal of fine particles of the recycled fine aggregate proposed by the present invention is a recycled aggregate manufacturing system that produces recycled aggregate by crushing and crushing construction waste and waste concrete to a certain standard through sequential processes. An aggregate dryer for drying by applying heat from waste heat to the crushed aggregate supplied through repetitive crushing and sorting processes from the aggregate; An aggregate pulverizer for pulverizing the crushed aggregate supplied from the aggregate dryer by applying an impact to the crushed aggregate supplied by dropping and dispersing it by centrifugal force while applying an impact according to contact friction to the crushed aggregate supplied from the aggregate, and pulverizing to separate the residual particles of the cement component from the aggregate; A first sorting unit for introducing the pulverized aggregate through the aggregate pulverizer, separating and sorting the aggregate based on a particle size of 3 mm, and separating and transferring aggregates less than the standard particle size by different paths; An aggregate classifier for removing fine particles from the aggregates by suctioning fine particles attached between the aggregates while receiving and receiving only aggregates with a selection standard particle size of 3 mm or less in the first sorting machine and moving them step by step; A second sorter having a multistage vibrating screen for re-selecting the aggregates of the reference particle size supplied through the aggregate classifier, sorting the aggregates by size, and removing fine particles between the aggregate and the aggregate or attached to the surface of the aggregate; The aggregate dryer, the aggregate pulverizer, the first sorter, the aggregate classifier, and the second sorter are connected to each of the fine dust collector for collecting fine particles before and after the production process of the aggregate and in each process; comprises.

The aggregate dryer is provided with a heating tube to which heat is supplied to the inside and a rotation tube that rotates to input and move the aggregate from the outside of the heating tube, but a drying double tube for drying the aggregate in the rotation tube by the heat dissipated from the heating tube. And, it is formed protruding on the inner circumference of the rotary pipe of the dry double pipe and constitutes a stirring blade for mixing the aggregate introduced into the rotary pipe.

The aggregate pulverizer includes a crushing chamber that vertically flows the aggregate inside, a rotor that rotates and disperses the aggregate falling in the vertical direction by rotationally driving in the crushing chamber, and is installed on the inner wall of the crushing chamber. And a vertical impact crusher comprising an anvil in which the aggregate dispersed from the rotor collides, and the rotor includes a rotor body having a plurality of aggregate dispersion holes and a support blade, and is rotatably installed in the rotor body. Consists of a distribution member for contacting and dispersing aggregates falling in a vertical direction in a right angle direction, and a tip plate having a three-stage tip that is coupled to and installed on the support blade of the rotor body and protruded by dividing three areas in the vertical direction. do.

Among the aggregates separated by the first sorter, an aggregate having a larger particle size (more than 3 mm) than a standard particle size is supplied, and includes a roll crusher for crushing the aggregate by transferring the aggregate between a pair of crushing rolls, and in the roll crusher The pulverized aggregate is transported and supplied to the aggregate pulverizer to be pulverized again from the aggregate pulverizer.

The aggregate classifier comprises a classification network forming a stepwise network shape while forming a sequential falling movement path of the aggregate, and a blowing means for blowing air to separate fine particles from the aggregates sequentially falling through the stepped movement path of the classification network. And a suction means for sucking and removing the fine powder separated from the blowing means.

The second sorter consists of a two-stage vibrating screen having an effective screen interval of 1 mm and 2 mm, arranged in a multi-stage structure, and vibrating for sorting aggregates.

The second separator is configured by installing a ball that continuously drives vertically up and down at the bottom of the screen.

According to the dry recycled aggregate manufacturing system through the removal of fine particles of the recycled fine aggregate according to the present invention, while removing the cement component attached to the surface of the aggregate, it selects and crushes by aggregate size, and inhales fine particles generated during the overall manufacturing process including the pulverization process. Since it is removed, it is possible to obtain an effect of improving the quality of products for high quality recycled fine aggregates while producing recycled fine aggregates with an absorption rate of 4 or less.

1 is a block diagram showing an embodiment according to the present invention.
Figure 2 is a front view schematically showing the aggregate dryer in an embodiment according to the present invention.
Figure 3 is a side cross-sectional view schematically showing the aggregate dryer in an embodiment according to the present invention.
Figure 4 is a cross-sectional view schematically showing the aggregate pulverizer in an embodiment according to the present invention.
Figure 5 is a front view schematically showing the aggregate pulverizer in an embodiment according to the present invention.
6 is a block diagram schematically showing an aggregate classifier in an embodiment according to the present invention.

The present invention is a recycled aggregate manufacturing system for producing recycled aggregate by crushing and crushing construction waste and waste concrete at a certain standard through a sequential process, in the crushed aggregate supplied through repetitive crushing and sorting processes from recycled coarse aggregates. An aggregate dryer for drying by applying heat from waste heat; An aggregate pulverizer for pulverizing the crushed aggregate supplied from the aggregate dryer by applying an impact to the crushed aggregate supplied by falling, and rotating and dispersing it by centrifugal force while applying an impact according to contact friction to the crushed aggregate supplied by falling, and pulverizing to separate residual particles of cement components from the aggregate; A first sorting unit for introducing the pulverized aggregate through the aggregate pulverizer, separating and sorting the aggregate based on a particle size of 3 mm, and separating and transferring aggregates less than the standard particle size by different paths; An aggregate classifier for removing fine particles from the aggregates by suctioning fine particles attached between the aggregates while receiving and receiving only aggregates with a selection standard particle size of 3 mm or less in the first sorting machine and moving them step by step; A second sorter having a multistage vibrating screen for re-selecting the aggregates of the reference particle size supplied through the aggregate classifier, sorting the aggregates by size, and removing fine particles between the aggregate and the aggregate or attached to the surface of the aggregate; The aggregate dryer, the aggregate grinder, the first sorter, the aggregate classifier, and the second sorter are respectively connected to a fine dust collector for collecting fines generated before and after an aggregate production process and in each process; of a circulating fine aggregate comprising: It features a dry recycled aggregate manufacturing system through fine powder removal as a feature of the technology configuration.

Next, a preferred embodiment of the dry recycled aggregate manufacturing system through the fine powder removal of the recycled fine aggregate according to the present invention will be described in detail with reference to the drawings.

First, an embodiment of the dry recycled aggregate manufacturing system through the removal of fine particles of the recycled fine aggregate according to the present invention, as shown in Figure 1, by crushing and pulverizing the construction waste and waste concrete in a predetermined standard through a sequential process to produce recycled aggregate. In the recycled aggregate manufacturing system to be produced, an aggregate dryer 100, an aggregate grinder 200, a first sorter 300, an aggregate classifier 400, a second sorter 500, and a fine dust collector ( 600).

The aggregate dryer 100 has a repetitive crushing and sorting process for circulating coarse aggregates, that is, primary crushing and sorting circulating coarse aggregates having a particle size of 20 to 40 mm, while transferring only aggregates of 8 mm or less to secondary crushing/grinding and sorting. The crushed aggregate that has gone through the process is supplied.

In the aggregate dryer 100, heat is applied from waste heat to crushed aggregate having a predetermined particle size, that is, 8 mm or less, and dried.

The aggregate dryer 100 is a structure capable of exerting a friction function between aggregates as well as a drying function for the crushed aggregate supplied from the outside, and the aggregate dryer 100 is a drying space capable of accommodating the crushed aggregate supplied from the outside. It is configured to form a structure of a double-pipe drying apparatus in which hot air is applied to the crushed aggregate while mixing the aggregate by rotating at a constant rotation rate and drying the aggregate.

As shown in Figs. 2 and 3, the aggregate dryer 100 includes a drying double pipe 110 extending in the longitudinal direction to form a drying path of the aggregate, and a stirring blade 120 that can be mixed so as to achieve friction between the aggregates. ).

As shown in FIG. 3, the drying double pipe 110 includes a heating pipe 111 to which heat is supplied to the inside, and a rotating pipe 113 for rotationally driving the aggregate to be input and moved from the outside of the heating pipe 111. do. That is, the drying double pipe 110 has a structure in which pipes of different diameters are formed inside and outside, and a heat source is supplied to the inner space of the heating pipe 111 to radiate it to the outside, and the heating in the rotating pipe 113 Since the aggregate is formed to form a moving path in a space spaced apart from the pipe 111, the aggregate in the rotating pipe 113 is dried by the heat dissipated from the heating pipe 111.

In the above, the heat source supplied into the heating pipe 111 uses waste heat obtained when organic foreign substances in construction waste are incinerated as a heat source.

Since the heating tube 111 is constantly in contact and friction as the aggregate moves, the material having high strength and hardness from external force, that is, one of aluminum-based and titanium-based alloys, and cemented carbide is used. It is desirable to avoid damage caused by.

The stirring blade 120 is formed to protrude on the inner periphery of the rotary pipe 113 of the dry double pipe 110 and is configured to mix the aggregates introduced into the rotary pipe 113 with each other. That is, a plurality of the stirring blades 120 are installed at equal intervals on the inner periphery of the rotation tube 113, and the aggregate accommodated in the rotation tube 113 is pumped up by the rotation of the rotation tube 113. After that, it is stirred in a structure in which the aggregate is dropped.

The aggregate pulverizer 200 imparts centrifugal force to the crushed aggregate supplied from the aggregate dryer 100 to apply an impact while dispersing it, so that the residual particles of the cement component weakened as the moisture in the aggregate is dried to be pulverized to separate from the aggregate. Performs a function.

As shown in FIG. 4, the aggregate pulverizer 200 is a structure capable of rotating and dispersing by centrifugal force while applying an impact according to contact friction to the crushed aggregate supplied from the outside. The rushing chamber 210 and a rotor 220 that rotates and distributes the aggregates falling vertically in the crushing chamber 210 by centrifugal force, and are installed on the inner wall of the crushing chamber 210 and the rotor It consists of a vertical impact crusher comprising an anvil 230 in which the aggregate dispersed from 220 collides.

As shown in FIG. 5, the rotor 220 is a configuration capable of rotating and dispersing aggregates by centrifugal force, and constitutes a rotor body 221, a distribution member 223, and a tip plate 225.

The rotor body 221 is configured to allow aggregates to be introduced vertically to the top, but after the aggregates introduced into the rotor body 221 are turned in a right angle direction through the distribution member 223, the anvil ( To form an aggregate dispersion hole (221a) so that it can be dispersed toward 230).

The aggregate dispersion hole (221a) is formed to be provided with a plurality along the outer circumference of the rotor body (221), and configured to be provided with a plurality of support blades (221b) corresponding to the aggregate dispersion hole (221a).

The support blade 221b is formed to couple and support the tip plate 225.

The distribution member 223 is rotatably installed in the rotor body 221 and is formed to contact and disperse aggregates falling in a vertical direction in a right angle direction.

The distribution member 223 is formed in a conical shape having an inclined surface inclined downwardly to the outside, so that the distribution to the upper side according to the contact of the aggregate is contacted and dispersed.

The distribution member 223 is composed of alloy steel or special steel.

The tip plate 225 performs a function of striking the aggregate dispersed in the aggregate dispersion hole 221a of the rotor body 221 to promote crushing and abrasion processing of the aggregate.

As shown in FIG. 5, the tip plate 225 has an overall rectangular cross-sectional shape, and is coupled and installed on a support blade 221b of the rotor body 221 in a detachable structure.

The tip plate 225 forms three divided areas in the vertical direction and includes a plurality of (three) tips 226 protruding toward the outside.

As a material usable for the tip plate 225, a cemented carbide is used.

The tip plate 225 includes a gap member 228 disposed between the support blade 221b to support the tip plate 225, so that the tip plate 225 directly contacts the aggregate. It is possible to minimize the deformation of the support blade (221b) while buffering the contact impact.

The gap member 228 is configured to form an inclined surface in which the support surface for contacting and supporting the tip plate 225 is inclined in the lateral direction, and the gap member 228 having inclined surfaces of various inclination angles is elastically applied. It is possible to flexibly set the inclination direction and the inclination angle of the tip plate 225.

In addition, the tip plate 225 may be configured in a split-and-coupled structure of tips that can be individually separated for each upper, middle, and lower areas divided for each of the tips 226.

In the above, the tip plate 225 is configured in a structure in which the tip plate 225 itself can be divided and combined, or the tip plate 225 is configured in a structure in which only three tips 226 can be separated and separately combined.

The first sorter 300 performs a function of sorting and separating aggregates based on a reference particle size with respect to the aggregates pulverized through the aggregate grinder 200.

Aggregate that has undergone a pulverization process according to the aggregate grinder 200 is introduced into the first sorter 300, and the aggregate is separated and sorted based on a particle size of 3 mm.

The first sorting machine 300 separates and transports the selected aggregates, but separates and transports the aggregates below the standard particle size by different paths. In other words, aggregates with a particle size of 3 mm or less, which is the standard particle size for selection in the first sorter 300, are transferred to the aggregate classifier 400, and aggregates with a particle size exceeding 3 mm among aggregates are transferred to a separate path. It makes it possible to go through the grinding process again.

Among the aggregates separated by the first sorter 300, an aggregate having a larger particle size (more than 3 mm) than the standard particle size is supplied, and the aggregate is transported between a pair of crushing rolls to crush the aggregate. do.

The aggregate crushed by the roll crusher 250 is transported and supplied to the aggregate pulverizer 200 to be pulverized again from the aggregate pulverizer 200, and the aggregate that has passed through the aggregate pulverizer 200 is again a first sorter ( 300), but the aggregates with a particle size exceeding 3㎜ are continuously pulverized.

The aggregate classifier 400 performs a function of removing fine particles from the aggregate by receiving only aggregates having a particle size of 3 mm or less, which is a selection standard particle size, from the first sorting machine 300.

As shown in FIG. 6, the aggregate classifier 400 is a structure capable of inhaling and removing fines attached between the aggregates while moving the aggregates supplied from the first sorter 300 in stages. ) And a blowing means 420, and a suction means 430.

The classification network 410 is formed in the form of a stepped network and configured to form a moving path for the sequential fall of the aggregate.

The blowing means 420 separates the fine powder by blowing air to the aggregates that sequentially fall down the stepped moving path of the classification network 410.

Since the blowing means 420 is installed to correspond to the top of each step of the classification network 410 forming a multi-stage step shape, it is configured to blow air in the process of falling of the aggregate.

The suction means 430 generally sucks the fine powder separated by the blowing means 420 in the aggregate classifier 400 to remove the fine powder.

The second sorter 500 separates the aggregates of the standard particle size supplied through the aggregate classifier 400, that is, aggregates of 3 mm or less, and sorts the aggregates into different sizes.

The second sorter 500 is provided with a multi-stage vibrating screen to sort aggregates of different particle sizes to sort aggregates by size.

The second sorter 500 constitutes a multi-stage vibrating screen, but specifically, the size of the effective screen spacing is 1 mm and 2 mm, and is arranged in a top and bottom multi-stage structure, and consists of a two-stage vibrating screen that vibrates for sorting aggregates. That is, the second sorting machine 500 primarily separates and selects aggregates with a particle size of 2 mm or more among aggregates with a particle size of 3 mm, and then secondaryly selects aggregates with a particle size of less than 2 mm, which was separated first, and has a particle size of 1 mm. The less than aggregate is separated and sorted.

In the second sorting machine 500, in the process of sorting aggregates by size, fine powders adhered between the aggregates or on the surface of the aggregates are sucked and removed.

Although not shown in the drawing, the second separator 500 is configured by installing a ball that continuously drives vertically up and down at the bottom of the screen. That is, the second selector 500 helps the movement of the aggregate by vertical motion of the ball at the bottom of the screen and prevents the screen from being clogged.

The finely divided dust collector 600 corresponds to the aggregate dryer 100 and the aggregate pulverizer 200, the first sorter 300, the aggregate classifier 400, and the second sorter 500, Organize to collect derivatives.

The finely divided dust collector 600 is connected to each of the aggregate dryer 100 and the aggregate pulverizer 200, the first selector 300, the aggregate classifier 400, and the second selector 500 to obtain fine powder. Collected, but before and after the production process of the aggregate and fine powder generated in each process is collected.

The differential collected by the differential dust collector 600 constitutes a differential storage means 650 capable of collecting and storing.

The fine powder of 0.08 mm or less among the fine powder collected in the fine powder storage means 650 is obtained as circulating fine powder.

That is, according to the dry recycled aggregate manufacturing system through the removal of fine particles of the recycled fine aggregate according to the present invention, which is configured as described above, while removing the cement component attached to the aggregate surface, while selecting and pulverizing by aggregate size, overall manufacturing including a crushing process Since fine powder generated during the process is sucked and removed, it is possible to improve the quality of the product for good quality recycled fine aggregate while producing recycled fine aggregate with an absorption rate of 4 or less.

In the above, a preferred embodiment of the dry recycled aggregate production system through the removal of fine particles of the recycled fine aggregate according to the present invention has been described, but the present invention is not limited thereto, but within the scope of the claims and the specification of the invention and the accompanying drawings. It is possible to implement it by transforming it into a branch, and this also belongs to the scope of the present invention.

100: aggregate dryer 110: drying double pipe 111: heating pipe
113: rotating pipe 120: stirring blade 200: aggregate grinder
210: crushing chamber 220: rotor 221: rotor body
221a: aggregate dispersion hole 221b: support blade 223: distribution member
225: tip plate 226: tip 228: gap member
230: anvil 250: roll crusher 300: first sorting machine
400: aggregate classifier 410: classification network 420: ventilation means
430: suction means 500: second sorter 600: fine dust collector
650: differential storage means

Claims (7)

In a recycled aggregate manufacturing system that produces recycled aggregate by crushing and crushing construction waste and waste concrete to a certain standard through a sequential process,
An aggregate dryer for drying by applying heat from waste heat to the crushed aggregate supplied through repetitive crushing and sorting processes from the recycled coarse aggregate;
An aggregate pulverizer for pulverizing the crushed aggregate supplied from the aggregate dryer by applying an impact to the crushed aggregate supplied by dropping and dispersing it by centrifugal force while applying an impact according to contact friction to the crushed aggregate supplied from the aggregate, and pulverizing to separate the residual particles of the cement component from the aggregate;
A first sorting unit for introducing the pulverized aggregate through the aggregate pulverizer, separating and sorting the aggregate based on a particle size of 3 mm, and separating and transferring aggregates less than the standard particle size by different paths;
An aggregate classifier for removing fine particles from the aggregates by receiving and receiving only aggregates of 3 mm or less, which is a selection standard particle size in the first sorting machine, and removing fine powders from the aggregates by inhaling fine powders attached between the aggregates while moving in stages;
A second sorter having a multistage vibrating screen for re-selecting the aggregates of the reference particle size supplied through the aggregate classifier, sorting the aggregates by size, and removing fine particles between the aggregate and the aggregate or attached to the surface of the aggregate;
Circulating fine aggregate comprising: a fine dust collector connected to the aggregate dryer, the aggregate grinder, the first sorter, the aggregate classifier, and the second sorter to collect fines generated before and after the aggregate production process and in each process; Dry recycled aggregate manufacturing system through the removal of fine particles.
The method according to claim 1,
The aggregate dryer is provided with a heating tube to which heat is supplied to the inside and a rotation tube that rotates to input and move the aggregate from the outside of the heating tube, but a drying double tube for drying the aggregate in the rotation tube by the heat dissipated from the heating tube. And, a stirring blade protruding on the inner periphery of the rotary pipe among the dry double pipes and mixing the aggregate flowing into the rotary pipe.
The method according to claim 1,
The aggregate pulverizer includes a crushing chamber for vertically flowing aggregates inside, a rotor for rotatingly and dispersing aggregates falling vertically in the crushing chamber by centrifugal force, and installed on the inner wall of the crushing chamber And a vertical impact crusher comprising an anvil in which the aggregate dispersed from the rotor collides,
The rotor includes a rotor body having a plurality of aggregate dispersing holes and support blades, a distribution member rotatably installed in the rotor body and contact and dispersing aggregates falling in a vertical direction in a right angle direction, and a support for the rotor body A dry recycled aggregate production system through the removal of fine particles of the recycled fine aggregate comprising a tip plate having a three-stage tip protruding by connecting and installing on the blade and dividing three areas in the vertical direction.
The method according to claim 1,
Aggregate having a particle size larger than a standard particle size (more than 3 mm) is supplied among the aggregates separated by the first separator, and includes a roll crusher for crushing the aggregate by transferring the aggregate between a pair of crushing rolls,
The aggregate pulverized by the roll crusher is transported to the aggregate pulverizer to be pulverized again from the aggregate pulverizer.
The method according to claim 1,
The aggregate classifier comprises a classification network forming a stepwise network shape while forming a sequential falling movement path of the aggregate, and a blowing means for blowing air to separate fine particles from the aggregates sequentially falling through the stepped movement path of the classification network. And a suction means for sucking and removing the fine powder separated from the blowing means.
The method according to claim 1,
The second sorting machine is a dry recycled aggregate manufacturing system by removing fine particles of circulating fine aggregate comprising a two-stage vibrating screen arranged in a top and bottom multi-stage structure with a screen effective interval of 1 mm and 2 mm, and vibrating to sort the aggregate. .
The method of claim 6,
A dry recycled aggregate manufacturing system through the removal of fines of the recycled fine aggregate comprising a ball continuously driving vertically vertically at the bottom of the screen in the second separator.

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