KR20200117424A - Separating method of recycled aggregate using thermal shock and separating system thereof - Google Patents

Abstract

The present invention relates to a method for separating recycled aggregate by using thermal shock and a system for separating recycled aggregate by using thermal shock. The method for separating recycled aggregate according to the present invention comprises: a preparation step of preparing recycled aggregate including a matrix and mortar; a heating step of heating the recycled aggregate prepared in the preparation step; a cooling step of applying thermal shock to the recycled aggregate by cooling the recycled aggregate heated in the heating step; and a separation step of separating the matrix and the mortar by allowing the recycled aggregate cooled in the cooling step to flow. The system for separating recycled aggregate according to the present invention comprises: a heating unit for heating recycled aggregate stored therein to a set temperature; a cooling unit connected to the heating unit and cooling the recycled aggregate heated in the heating unit by immersing the same in a fluid at a set temperature; a separation unit for separating a matrix and mortar included in the recycled aggregate by allowing the recycled aggregate cooled in the cooling unit to flow; and a sorting unit for sorting the matrix and mortar separated in the separation unit to store the same. A separation method that proceeds in the order has advantages of increasing separation efficiency of a matrix and mortar by applying secondary thermal shock and being economical. Also, a separation system having the configuration has advantages of treating a large amount of recycled aggregate and enabling an automated process.

Description

Separation method of recycled aggregate using thermal shock and separation system of recycled aggregate using thermal shock {SEPARATING METHOD OF RECYCLED AGGREGATE USING THERMAL SHOCK AND SEPARATING SYSTEM THEREOF}

The present invention relates to a method for separating recycled aggregate using thermal shock and a system for separating recycled aggregate using thermal shock, and more particularly, in a method and system for separating the mother rock from the recycled aggregate including the mother rock and mortar, heating and cooling It relates to a separation method and separation system for effectively separating the mother rock and the mortar by sequentially performing thermal shock to the recycled aggregate.

Construction waste is generally bulky and consists mostly of non-combustible materials, making it difficult to landfill or incinerate. Recently, research and development of construction waste is being actively conducted in a way that recycles from the way it was buried. In particular, waste concrete is used as a filling material or filling material during construction.

In the case of waste concrete, recycled aggregate is reused as aggregate in the manufacture of concrete after crushing and sorting. These recycled aggregates include the mother rock and the mortar attached to the outside of the mother rock, and the quality of the recycled aggregate is determined by the amount of mortar contained in the recycled aggregate, and the absorption rate of the recycled aggregate increases as the amount of mortar increases. The quality decreases, such as increasing and decreasing strength.

Recently, in order to separate the mortar contained in the recycled aggregate, the recycled aggregate is crushed through a jaw crusher, and then it is submerged in the water in the tank using the difference in specific gravity between the mother rock and the mortar, and the mortar or foreign substances are suspended by buoyancy. The technology has been disclosed.

As a prior art, Korean Patent Registration No. 10-1061018 discloses a method for recovering recycled fine aggregates from construction waste by crushing construction waste and separating interference sedimentation according to a specific gravity difference. In the above registered patent, construction waste is crushed according to free fall by replacing equipment such as jaw crusher to prevent damage to the parent rock, but crushing is not sufficiently performed by separation and sorting by physical crushing and specific gravity difference. If not, it is difficult to achieve the purpose, and there is a problem that it is difficult to remove the mortar attached to the mother rock only by the difference in specific gravity.

In addition, Korean Patent Registration No. 10-1823975 discloses a system for recovering suspended matter and recycled aggregate by vibrating multiple screens. Even in this case, since the screening is performed through specific gravity difference and physical crushing, There is a problem that it is difficult to remove the mortar effectively.

(Document 0001) Korean Patent Registration No. 10-1061018 (Document 0002) Korean Patent Registration No. 10-1823975 (Document 0003) Korean Patent Application Publication No. 10-2016-0069278

An object of the present invention in view of the above points is to provide a separation method and a separation system capable of effectively separating and sorting the mortar attached to the outside of the parent rock and the parent rock.

In addition, another object of the present invention is to provide a separation method and separation system that is economical and capable of treating a large amount of recycled aggregate at the same time.

The method for separating recycled aggregate using thermal shock according to the present invention for achieving the above object includes a preparation step of preparing a recycled aggregate including a mother rock and a mortar, a heating step of heating the recycled aggregate prepared in the preparation step, and heating in the heating step. And a cooling step of cooling the recycled aggregate to apply a thermal shock to the recycled aggregate, and a separation step of separating the mother rock from the mortar by flowing the recycled aggregate cooled in the cooling step.

In addition, the cooling step may be cooled by immersing the recycled aggregate in a fluid having a set temperature.

In addition, in the separation step, a physical impact may be applied while flowing the recycled aggregate cooled in the cooling step through a stirrer or a temporary mixer.

In addition, it may further include a submersion step of submerging the recycled aggregate prepared in the preparation step.

The system for separating recycled aggregate using thermal shock according to the present invention is a heating unit that heats the recycled aggregate contained therein to a set temperature, and is connected to the heating unit, and cools the recycled aggregate heated by the heating unit by immersing it in a fluid of a set temperature. It includes a cooling unit, a separating unit for separating the mortar from the mother rock included in the circulating aggregate by flowing the recycled aggregate cooled in the cooling unit, and a separating unit for separating and storing the mother rock and mortar separated by the separation unit.

In addition, it may further include a supply unit for submerging the recycled aggregate to form a wet state, and supplying the wet recycled aggregate to the heating unit.

In addition, the cooling unit moves the cooling tank in which the fluid and the circulating aggregate are accommodated, the fluid supply pipe connected to the cooling tank to supply the fluid, the fluid discharge pipe connected to the cooling tank to discharge the fluid, and the circulating aggregate accommodated in the cooling tank in a certain direction. It may include a moving member to let.

In addition, the moving member may be connected to a rotational shaft of a motor provided outside the cooling tank in a helical manner to rotate about the rotational axis.

According to an embodiment of the present invention, heat shock is applied to the recycled aggregate to increase the separation and sorting efficiency of the mother rock and the mortar.

In addition, since there is little variation according to the separation ratio of mortar, recycled aggregate of uniform quality can be reproduced.

In addition, it is possible to process a larger amount of recycled aggregate per unit time and is economical.

1 is a flow chart showing a method of separating recycled aggregate using thermal shock according to an embodiment of the present invention.
2 is an image showing a heating step according to an embodiment of the present invention.
3 is an image showing a cooling step according to an embodiment of the present invention.
4 is an image showing a specimen and scanning by an image processing method.
5 is a block diagram showing a recycled aggregate separation system using thermal shock according to an embodiment of the present invention.
6 is a conceptual diagram showing a method of separating recycled aggregate using thermal shock according to an embodiment of the present invention.

In describing the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, a detailed description thereof will be omitted.

Since the embodiments according to the concept of the present invention can apply various changes and have various forms, specific embodiments will be illustrated in the drawings and described in detail in the present specification or application. However, this is not intended to limit the embodiments according to the concept of the present invention to a specific form of disclosure, and it should be understood that all changes, equivalents, and substitutes included in the spirit and scope of the present invention are included.

The terms used in the present specification are only used to describe specific embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this specification, the "inclusive" or "gajida" and the terms are staking the features, numbers, steps, operations, elements, parts or geotyiji to be a combination thereof specify the presence, of one or more other features, integers It is to be understood that the possibility of addition or presence of, steps, actions, components, parts, or combinations thereof is not preliminarily excluded.

Hereinafter, the present invention will be described in detail.

1 is a flow chart showing a method of separating recycled aggregate using thermal shock according to an embodiment of the present invention.

Separation method of recycled aggregate (R) using thermal shock according to an embodiment of the present invention is a preparation step (S100) of preparing a recycled aggregate (R) comprising a mother rock (V) and mortar (M), the preparation step A heating step (S300) of heating the recycled aggregate (R) prepared in (S100), a cooling step of applying a thermal shock to the recycled aggregate (R) by cooling the recycled aggregate (R) heated in the heating step (S300) ( S400) and a separation step (S500) of separating the mother arm (V) and the mortar (M) by flowing the recycled aggregate (R) cooled in the cooling step (S400).

Recycled aggregate (R) is a kind of construction waste, and may mean the crushed state of the first concrete product, and the recycled aggregate (R) contains mortar (M) attached to the outer circumferential surfaces of the mother rock (V) and the mother rock (V). Can include. Here, when the mother rock (V) is assumed to be a natural aggregate, the mortar (M) may mean cement, water, or a hardener mixed with the natural aggregate when producing a concrete product using natural aggregate.

The recycled aggregate (R) may mean a state in which crushing is completed through a crushing device and selected, and the crushing device is pulverized to have a set particle size using equipment such as a jaw crusher, cone crusher, roll crusher, and impact crusher. , Sorting means sorting various foreign substances other than recycled aggregate (R) through manpower, magnetic force, wind power, and floating.

In an embodiment of the present invention, it may include an immersion step (S200) of submerging the recycled aggregate (R) prepared in the preparation step (S100). The immersion step (S200) is preferably performed between the preparatory step (S100) and the heating step (S300), and the recycled aggregate (R) prepared in the preparatory step (S100) is immersed in water or other fluid to a wet state. Make In the submerged step (S200), it is preferable to maintain the recycled aggregate R in a submerged state in a fluid such as water for a certain period of time until the recycled aggregate R is sufficiently saturated. In the present invention, the recycled aggregate (R) can be immersed in water for about 24 hours to maintain a wet state.

2 is an image showing a heating step (S300) according to an embodiment of the present invention.

Referring to Figure 2, the heating step (S300) of the present invention is a step of heating the recycled aggregate (R) for which the preparation step (S100) or the immersion step (S200) is completed for a set time under a set temperature condition, and the electric furnace is It can be used, and by placing the recycled aggregate (R) inside the electric furnace to heat the recycled aggregate (R) at a temperature between 400 to 600 ℃. The heating time was heated for about 1 hour in the experimental stage of the present invention, but may vary depending on the conditions of the recycled aggregate (R) or the heating environment.

In the above heating step (S300), a thermal shock is first applied to the recycled aggregate (R). According to the above heating step (S300), the mortar (M) contained in the recycled aggregate (R) is dried and dehydration proceeds.

3 is an image showing a cooling step (S400) according to an embodiment of the present invention.

Referring to Figure 3, the cooling step (S400) of the present invention is a step of applying a thermal shock to the recycled aggregate (R) by rapidly cooling the recycled aggregate (R) heated in the heating step (S300), the recycled aggregate (R ) Can be cooled by immersing in the fluid at a set temperature. For example, in the cooling step (S400), the recycled aggregate R in a heated state may be submerged in ice water of -5°C or higher and 5°C or lower to apply a secondary thermal shock to the recycled aggregate R. As another example, the cooling step (S400) may be performed by immersing the recycled aggregate R in a fluid other than water capable of rapidly cooling the recycled aggregate R.

If the separation of the mother rock (V) and the mortar (M) through the heating step (S300) and the cooling step (S400) will be described in detail, the thermal expansion coefficient of the mother rock (V) and the mortar (M) in the heating step (S300) Is different from each other, and the mortar (M) is dehydrated and the strength is weakened. Here, when the above-described immersion step (S200) is performed, the moist mortar (M) is dried and expanded to generate voids, and the strength decreases further as compared to when the wetting step is not performed. Moisture penetrates into the interface between the mortar (M) and the mother rock (V) by immersing the heated circulating aggregate (R) in the cooling step (S400) and rapidly cooling it.By rapid cooling, the mortar (M ) And the mother arm (V) have different degrees of contraction, and the contraction proceeds while maintaining the upper interface.

That is, in the present invention, heat shock is first applied through the heating step (S300), and thermal shock is secondarily applied through the cooling step (S400), so that the mother rock (V) and the mortar (M) having different coefficients of thermal expansion. It is easy to maintain the interface between them, and there is an effect that the mother rock (V) and the mortar (M) can be easily separated. In addition, since the mortar (M) can be more easily separated by applying a secondary thermal shock through the cooling step (S400), the heating time of the heating step (S300) is shortened compared to the case where the cooling step (S400) is not performed. It works.

The separation step (S500) of the present invention is a step of separating the mortar (M) and the mother rock (V) by flowing the recycled aggregate (R) completed in the cooling step (S400), and the recycled aggregate (R) is a stirrer or a temporary mixer It can be separated by applying a physical impact while flowing through. As the recycled aggregate (R) is flowed through a stirrer or a temporary mixer, a frictional force acts between the recycled aggregates (R), thereby separating the mother rock (V) and the mortar (M).

The circulating aggregate (R) to which the secondary heat shock was applied through the heating step (S300) and the cooling step (S400) easily removes the mother arm (V) and the mortar (M) even without excessive impact or friction in the separation step (S500). It can be separated, and the operating time can be shortened when using a stirrer or a temporary mixer.

Table 1 below shows the residual mortar (M) content ratio (RMC; Residual Mortar Content) according to the present invention, the residual mortar (M) content ratio by the image processing method, and according to Korean Patent Laid-Open No. 10-2016-0069278. It shows the experimental results comparing the residual mortar (M) content ratio.

)을 나타낸다.When explaining the image processing method with reference to FIG. 4, in order to calculate the residual mortar content (RMC), concrete was made with only white cement and recycled aggregate, and cured by putting it in a mold of 100x100x400mm. do. This is to distinguish between new mortar and old mortar in the image processing method. When the concrete is completely hardened, the thickness of the specimen is cut to about 50mm, then the surface is ground 2 to 3mm using a grinder, dust is removed, and a 2D image is performed by scanning the surface of the specimen while the surface is arranged using acetone. Processing to calculate the RMC. 4 is an image showing a specimen and scanning by an image processing method. Figure 4 (a) shows a specimen cured by making concrete with white cement and recycled aggregate, and Figure 4 (b) is the area of the mother rock treated after scanning of the specimen (

).

The above method is Proposed Method for Determining the Residual Mortar Content of Recycled Concrete Aggregates by A. Abbas, G. Fathifazl, O. Isgor, A. Razaqpur, B. Fournier, S. Foo (Journal of ASTM International, Vol. 5, No. 1, Paper ID JAI101087, Available online was used, but IMT iSolution DT was used as the image processing program IMT iSolution DT is an image analysis program for capturing, correcting, enhancing and measuring digital images, Alternatively, the desired object of the image was threshoded by the difference in color, and the optical parameters (brightness, color channel, optical density) and shape parameters (area, side, shape and size) of the object were measured.

<Table 1. RMC calculation experiment results 1> RCA sample name Sample Initial recycled aggregate
Sample amount (g) Amount of mother rock aggregate after experiment (g) RMC(%) Average RMC (%) RRC(a) One 1000.2 606 39.4 39.9 2 1000.3 596 40.4 RRC(b) One - - 34.9 32.3 2 - - 25.5 3 - - 32.3 RRC(c) One - - 36.9 40.1 2 - - 41.0 3 - - 42.5

(a) method according to the invention

(b) Method by image processing method

(c) Method using a chemical solution (aqueous sulfuric acid solution) (Korean Patent Laid-Open Patent No. 10-2016-0069278)

In the case of (a) and (c), RMC was calculated through Equation 1 below, and in the case of (b), RMC was calculated through Equation 2 below.

<Equation 1>

는 모르타르(M)가 제거되지 않은 순환골재(R)의 무게,

는 모르타르(M)가 제거된 순환골재(R)의 무게)(

Is the weight of the recycled aggregate (R) from which the mortar (M) has not been removed,

Is the weight of the recycled aggregate (R) from which the mortar (M) has been removed)

<Equation 2>

는 100x400mm 시료에 들어간 순환골재 시료의 면적,

는 순환골재 시료중의 모암만의 면적)(

Is the area of the recycled aggregate sample in the 100x400mm sample,

Is the area of the mother rock in the recycled aggregate sample)

From Equation 1, it can be seen that the higher the RMC, the higher the separation ratio between the mortar (M) and the mother rock (V).

First, when (a) and (c) are compared, as shown in Table 1 above, the average value of RMC shows a similar degree, but it can be seen that (a) shows a uniform experimental result because the deviation is lower than (c). That is, in the case of the present invention, the RMC value has the same level as the method using a chemical solution, but the deviation is small, and uniform quality can be guaranteed. In addition, in the present invention, it is possible to process a large amount of recycled aggregate (R), and there is an advantage in that the cost can be reduced and the process can be simplified.

Comparing (a) and (b), it can be seen that in the case of (b), the deviation between samples is very large. In image processing, there is a disadvantage in that the reliability is slightly inferior and the variation is large depending on the condition or type of the specimen, and the parameters to be set. On the other hand, in the case of (a), the deviation is small and the degree of calculation of the reliable RMC value is shown.

Table 2 below shows the experimental results showing the residual mortar (M) content ratio (RMC; Residual Mortar Content) according to the presence or absence of the cooling step (S400) of the present invention.

<Table 2. RMC calculation experiment results 2> When performing the cooling step (S400) (A) If the cooling step (S400) is not performed (B) Recycled aggregate (R) Sample mass (g) 955.9 957.7 RM (g) 206.9 91.9 RMC(%) 21.64 9.60

RMC calculation experiment result 2 in Table 2 above shows the degree of separation and RMC of the mortar (M) for the same time depending on whether or not the cooling step (S400) is performed, and the above experimental results show the values measured after 1 hour and 12 minutes. Done. It can be seen that the value of RMC (%) is significantly higher in the case of A performing the cooling step (S400) of the present invention than in the case of B not performing the cooling step (S400). In the case of B, in order to achieve the same level of RMC (%) as in the case of A, forced stirring for 2 hours or more must be performed.

Table 3 below is an experiment result showing the residual mortar content ratio (RMC; Residual Mortar Content) according to the temperature of the cooling water to which the recycled aggregate R is submerged in the cooling step (S400) of the present invention.

<Table 3. RMC calculation experiment results 3> When immersed in ice water in the cooling step (S400) (C) When immersed in room temperature (20℃) in the cooling step (S400) (D) Recycled aggregate (R) Sample mass (g) 955.9 922.4 RM (g) 206.9 128.2 RMC(%) 21.64 13.9

RMC calculation experiment result 3 of Table 3 shows the degree of separation of mortar (M) and RMC for the same time by varying the temperature of the water to which the recycled aggregate (R) is submerged in the cooling step (S400), and the above experiment result is 1 The values measured after 12 minutes are shown. In the case of C submerged in ice water and about 0℃ water, the RMC value is more remarkable than that of D submerged at room temperature and about 20℃. For an additional 20 minutes or more forced stirring must be carried out.

As shown in the above and experimental results 1 to 3, the method for separating recycled aggregate according to the present invention can increase the degree of separation between the mother rock (V) and the mortar (M) by applying double thermal shock according to heating and rapid cooling, and the structure and process It has the advantage of ensuring the simplification effect and uniformity of quality. In addition, in the cooling step (S400), as the temperature of the fluid to which the recycled aggregate R is submerged is rapidly cooled, the separation time between the mother arm V and the mortar M can be shortened and the degree of separation can be further increased.

Hereinafter, a system for separating recycled aggregate using thermal shock according to the present invention will be described.

5 is a block diagram showing a system for separating recycled aggregate using thermal shock according to an embodiment of the present invention, and FIG. 6 is a conceptual diagram showing a method for separating recycled aggregate using thermal shock according to an embodiment of the present invention.

5 and 6, the recycled aggregate (R) separation system of the present invention is a heating unit 100 for heating the recycled aggregate (R) accommodated therein to a set temperature, connected to the heating unit 100, and the heating A cooling unit 200 that cools the recycled aggregate R heated in the unit 100 by immersion in a fluid of a set temperature, and the recycled aggregate R cooled by the cooling unit 200 flows to the recycled aggregate R A separating unit 300 for separating the mother arm V and the mortar M included in ), and the separating unit 400 for separating and storing the parent arm V and the mortar M separated by the separating unit 300 Includes.

In addition, in an embodiment of the present invention, a supply unit for submerging the recycled aggregate (R) to form a wet state, and supplying the recycled aggregate (R) in the wet state to the heating unit 100 may be further included.

The supply unit is connected to the heating unit 100 and supplies the recycled aggregate R to the heating unit 100. The supply unit includes a tank of a set capacity, and the recycled aggregate R is immersed in the tank for a set time. When the water immersion is completed, the recycled aggregate R is moved from the water tank to the heating unit 100 while maintaining a wet state.

The heating unit 100 is provided with a circulating aggregate (R) therein, receiving electricity from the outside to heat the circulating aggregate (R), and is provided on one side of the heating furnace 120 It includes a possible supply path 110 and a discharge path 130 provided on the other side of the heating furnace 120 and capable of opening and closing, and the discharge path 130 is connected to the cooling unit 200. For example, the supply path 110 and the discharge path 130 can be opened or closed, respectively, and the supply path 110 and the discharge path 130 are closed and set under a temperature condition set through the heating furnace 120. During the time, the recycled aggregate R is heated, and when the heating is completed, the discharge path 130 is opened and the recycled aggregate R is discharged.

It is preferable that the heating furnace 120 has a sealed structure.

The cooling unit 200 is connected to a cooling tank 210 in which fluid and circulating aggregate R are accommodated, a fluid supply pipe 220 connected to the cooling tank 210 to supply a fluid, and the cooling tank 210 And a fluid discharge pipe 230 through which the fluid is discharged and a moving member 240 for moving the circulating aggregate R accommodated in the cooling tank 210 in a predetermined direction.

The cooling tank 210 is located at one side or a lower portion of the heating unit 100 and is connected to the discharge passage 130 of the heating unit 100 to supply the recycled aggregate R discharged to the discharge passage 130. The fluid supplied through the fluid supply pipe 220 is accommodated in the cooling tank 210, and the circulating aggregate R discharged through the discharge path 130 is rapidly cooled by the fluid contained in the cooling tank 210.

The fluid supply pipe 220 is connected to the cooler 250 and the like, and is supplied to the cooling tank 210 through the fluid supply pipe 220 while the fluid is cooled through the cooler 250. The cooler 250 is not limited in structure as long as it can cool the fluid. For example, the cooler 250 has a structure that compresses, condenses, vaporizes, and expands the fluid or the refrigerant exchanging heat with the fluid, or dry ice or liquid nitrogen. It may have a structure in which a separate refrigerant is directly exchanged with a fluid. It is preferable that the fluid supply pipe 220 is provided with a supply valve 221 to control the flow rate of the supplied fluid.

The fluid discharge pipe 230 discharges the fluid inside the cooling tank 210 to the outside, and the fluid discharged to the outside may be resupplied to the above-described cooler 250 or stored in a separate space. It is preferable that the fluid discharge pipe 230 is provided with a discharge valve 231 to control the flow rate of the discharged fluid.

In an embodiment of the present invention, the cooling unit 200 is provided in the valve controller and the cooling tank 210 to control the supply valve 221 and the discharge valve 231 and measures the temperature inside the cooling tank 210 A sensor may be further included, and the valve controller may control the supply valve 221 and the discharge valve 231 based on the temperature measured from the temperature sensor. For example, when the temperature measured from the temperature sensor is below the set reference value, the valve controller opens the supply valve 221 and the discharge valve 231 to discharge the increased fluid to the outside and simultaneously supply the cooled fluid again to cool it. The temperature inside the bath 210 can be maintained below a set reference value,

A moving member 240 is disposed inside the cooling tank 210 to move the fluid and the circulation aggregate R inside the cooling tank 210 in a certain direction. In an embodiment of the present invention, the moving member 240 is connected to the moving motor 241 and the moving motor 241 disposed outside the cooling tank 210 and penetrates the cooling tank 210 from one side to the other. It includes a moving rotation shaft 242 and a moving blade 243 connected to the moving rotation shaft 242 and disposed inside the cooling tank 210 and wound in a spiral shape. In this case, the moving blade 243 receives rotational force from the moving rotation shaft 242 and moves the circulating aggregate R and the fluid accommodated therein at a constant speed from one side to the other. The separation unit 300 is connected to the other side of the cooling tank 210.

The separating unit 300 applies a physical impact while receiving the cooled circulation aggregate R from the cooling unit 200 and flowing. In an embodiment of the present invention, the separation unit 300 includes a separation tank, a stirring motor 310 provided outside the separation tank, and a stirring rotation shaft 320 connected to the stirring motor 310 and provided to pass through the separation tank. ), it is connected to the stirring rotation shaft 320, is disposed inside the separation tank, and includes a stirring blade 321 wound in a spiral shape. It is preferable that the stirring blades 321 are provided with a predetermined distance from the rotation shaft 320 in order to increase the fluidity of the recycled aggregate (R). In the separating part 300, the recycled aggregate (R) flows at a low speed, and the mother rock (V) and the mortar (M) are separated from each other.

In an embodiment of the present invention, it may further include a sorting unit 400 for separating the mother arm (V) and mortar (M) separated by the separating unit 300.

The sorting unit 400 may be composed of a conveyor 410, a first storage 420 and a second storage 430, and the first storage 420 stores the mother arm V and the second storage 430 The mortar (M) is stored.

The conveyor 410 receives the mortar (M) and the mother rock (V) separated from the separating unit 300 and moves it in the direction of the first storage 420, and the upper and lower surfaces have a lattice structure, so that the mother rock ( V) is moved to the first storage 420 by the conveyor 410, but the mortar (M) having a relatively small particle size falls downward.

In order to evenly select the mother rock (V) and mortar (M) through the conveyor 410, the amount of supply of the mother rock (V) and mortar (M) supplied to the upper surface of the conveyor 410 through the separation unit 300 is the conveyor 410 It is preferable that the capacity set in consideration of the rotational speed of) is sequentially supplied.

Separation of the parent rock (V) and mortar (M) of the recycled aggregate (R) through the heating unit 100, the cooling unit 200, the separating unit 300 and the sorting unit 400 is sequentially in a series of processes. In progress, the present invention through the above series of processes can process a large amount of recycled aggregate (R) and applies a secondary thermal shock through the heating unit 100 and the cooling unit 200, so the selected mother arm (V) There is an advantage that can improve the quality of the product.

S100: preparation step S200: immersion step
S300: heating step S400: cooling step
S500: Separation step
100: heating part
110: supply furnace 120: heating furnace
130: discharge furnace
200: cooling unit
210: cooling tank 220: fluid supply pipe
221: supply valve 230: fluid discharge pipe
231: discharge valve 240: moving member
241: moving motor 242: moving rotating shaft
243: moving wing 250: cooler
300: separation part
310: stirring motor 320: stirring rotation shaft
321: stirring blade
400: sorting unit
410: conveyor 420: first storage
430: second storage
R: recycled aggregate V: mother rock
M: Mortar

Claims (8)

A preparation step of preparing a recycled aggregate containing a mother rock and mortar;
A heating step of heating the recycled aggregate prepared in the preparation step;
A cooling step of applying a thermal shock to the recycled aggregate by cooling the recycled aggregate heated in the heating step; And
Separation step of separating the mortar from the mother rock by flowing the recycled aggregate cooled in the cooling step; Method for separating recycled aggregate using thermal shock, characterized in that it comprises a.
The method of claim 1,
The cooling step,
The recycled aggregate separation method using thermal shock, characterized in that the recycled aggregate is cooled by immersing it in a fluid at a set temperature.
The method of claim 2,
The separation step,
A method for separating recycled aggregate using thermal shock, characterized in that while applying a physical impact while flowing the recycled aggregate cooled in the cooling step through a stirrer or a temporary mixer.
The method of claim 2,
A immersion step of submerging the recycled aggregate prepared in the preparation step; a method for separating recycled aggregate using thermal shock, characterized in that it further comprises.
A heating unit for heating the recycled aggregate contained therein to a set temperature;
A cooling unit connected to the heating unit and immersing the recycled aggregate heated by the heating unit in a fluid having a set temperature to cool it;
A separating unit for separating the mortar from the mother rock contained in the recycled aggregate by flowing the recycled aggregate cooled by the cooling unit; And
A sorting unit for separating and storing the mother rock and mortar separated in the separating unit.
The method of claim 5,
A system for separating recycled aggregates using thermal shock, further comprising: a submerged unit for submerging recycled aggregate to form a wet state and supplying the wet recycled aggregate to the heating unit.
The method of claim 6,
The cooling unit,
A cooling tank in which the fluid and the recycled aggregate are accommodated;
A fluid supply pipe connected to the cooling tank to supply a fluid;
A fluid discharge pipe connected to the cooling tank to discharge fluid; And
Recycling aggregate separation system using thermal shock, characterized in that it comprises a moving member for moving the recycled aggregate accommodated in the cooling tank in a predetermined direction.
The method of claim 7,
The moving member,
A circulating aggregate separation system using thermal shock, characterized in that it is connected to a rotation shaft of a motor provided outside the cooling tank in a spiral and rotates around the rotation shaft.

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