KR20020060435A - Reforming Process and System for Recycled Aggregate - Google Patents

Abstract

PURPOSE: An apparatus and a method for improving particle shape and quality of waste concrete regeneration aggregate are provided to effectively remove cement or mortar attached to the surface of the aggregate, and to improve the efficiency of operating by continuously separating and washing sand or cement with water. CONSTITUTION: The apparatus for improving particle shape and quality of waste concrete regeneration aggregate consists of a cylindrical body(60); a plurality of orbital rollers(70,72) installed so as to support the body upwardly; and an outer driving source. The body is formed with an input part(80) and an outer part(90) at both opposite sides thereof, and the inner space of the body is divided into plural sections having a center passage(68) respectively.

Description

Reforming Process and System for Recycled Aggregate}

The present invention relates to a method and apparatus for improving the granularity and quality of waste concrete recycled aggregate, and in particular, an intermediate aggregate obtained after crushing waste concrete to produce aggregate suitable for use as a base or surface layer as aggregate for asphalt concrete (asphalt concrete). It relates to a method and apparatus that can improve the shape and quality of the.

In recent years, more than 20 million tons of construction wastes are generated annually in Korea, among which more than 5 million tons of waste concrete and more than 2.5 million tons of asphalt waste concrete are accounted for. However, only a very small amount of construction wastes generated every year are recycled into road construction or road composition of road construction, and most of the remaining landfills are disposed of or disposed of in a considerable amount, and a significant amount of dumping causes serious soil contamination. There is a situation.

In addition, in Korea, some of the aforementioned construction wastes are reprocessed by several construction waste intermediate treatment companies to produce recycled aggregates. However, in the case of recycled aggregates produced in this manner, the quality standards required by aggregates are not met. There is practically no limit.

Then, as a conventional technology used in the existing construction waste intermediate treatment company, it will be described as follows with reference to the accompanying drawings how the prior art for producing recycled aggregates using waste concrete is implemented. .

For example, as shown in FIG. 1, first, the waste concrete mass is separated through the hopper 1 and the feeder 3, and the soil powder 5 is separated, and the first jaw crusher 7 is carried out. After crushing by) and feeding the vibrating screen 11 through the feeding conveyor (9), the stone powder (13) is separated while passing through the vibrating screen (11), and again in the cone crusher (Cone Crusher) (15) By crushing by car and passing through the feed conveyor 17, the screen 19, the sand 21, coarse aggregate (23) and coarse aggregate (25) are sequentially separated, and the larger one is separated from the concrete (15) The treatment is made in such a way as to return to.

Next, in the case of the example shown in FIG. 2, as illustrated in FIG. 1, the hopper 1, the feeder 3, the primary jaw crusher 7, the feeding conveyor 9 and the vibrating screen 11 are subjected to Next, the only difference is that a process of removing impurities by passing through the blower 27 and the classifier 29 is added.

In addition, the example shown in FIG. 3 is the same to the hopper 1, the feeder 3, the primary jaw crusher 7, and the feeding conveyor 9, as shown to FIG. 1 and FIG. Through a rotating screen (31) and blower (33), secondary jaw crusher (35), feeding conveyor (37), vibrating screen (39), and the third crusher (41) such as impact breaker (Impact Breaker) The process is of a different degree, and then the process of passing through the feed conveyor 17 and the screen 19 is the same as the above-described example.

Of course, even if the crusher 41, such as the above-described cone crusher 15 or impact breaker is adopted as the secondary to tertiary crushing equipment, in the strict sense, this is not an improvement of the shape of the granules, but only for producing recycled aggregates. I will be in charge of part of the shredding process.

As such, the conventional production method of various recycled aggregates is to crush waste concrete in the first to third stages, to remove impurities, soil, or stone before or during crushing, and to classify the crushed waste concrete by its size. It can be seen that only made of a process, such a conventional production method is exposed the following problems.

First, in the case of crushed waste concrete, it is forced to be crushed. Therefore, in the crushed tablets, the granules are poorly crushed and the mortar adhesion is not only high but the ratio of curb is high. Since the fine particles such as sand are attached, they do not meet the quality standards to be used as they are, and even when used as aggregates, the surface is not firm and there is a possibility of deformation or fragile parts after construction, which makes it unstable to use as aggregates. There is,

Second, in the case of crushed concrete, only a part of the concrete is produced in the form of pure aggregate, but most of it is formed with cement or mortar attached to the surface of the aggregate or mortar is solidified. In the case of these cement or mortar, aggregate There is a problem in that it is weak enough to be inadequate to use as a major factor to reduce the quality of the recycled aggregate.

The present invention has been researched and developed to solve all the problems occurring in the production process of the conventional recycled aggregate described above.

That is, the main purpose of the present invention is to dramatically improve the granularity sharply formed after the crushing of the waste concrete in the production process of recycled aggregate, to effectively remove the cement or mortar attached to the surface of the aggregate, and to curb the curb ratio It is to lower the quality of recycled aggregates more drastically.

In addition, another object of the present invention is to provide a device for more effective mutual friction between the intermediate aggregates or the internal components constituting the device in order to improve the quality of the crushed waste concrete more effectively while improving the quality. .

In addition, another object of the present invention is that the configuration of the device is relatively simple, easy to manufacture, convenient to operate, and when the screen, brush, water spray nozzles, etc. are further adopted in the process of improving the shape or surface treatment The purpose of the present invention is to provide a device capable of improving the efficiency of operation by continuously separating fine particles.

1 to 3 are schematic diagrams each showing a process mainly for explaining a conventional method of producing recycled aggregate using waste concrete;

4 is a schematic diagram illustrating the concept of the method of the present invention;

FIG. 5 is a longitudinal sectional view showing a preferred example of the apparatus exemplarily illustrated by specifically realizing the method illustrated in FIG. 4; FIG.

6 is a cross-sectional view taken along the line A-A of FIG.

FIG. 7 is a longitudinal sectional view showing a modification of the example illustrated in FIG. 6; FIG.

8 is a longitudinal sectional view showing another modification of the example illustrated in FIGS. 6 and 7;

9 is a left side view of FIG. 5;

FIG. 10 is a sectional view illustrating a modification by adding some configurations of the example shown in FIG. 5; FIG.

<Description of the symbols for the main parts of the drawings>

60 body, 68 passage, 70, 72 idle roll, 80 input, 90 discharge

The present invention provides a method for producing recycled aggregates by shredding and sorting waste concrete of various construction wastes in order to achieve the above-mentioned various objects, crushing inside the main body of the cylindrical shape configured to rotate in place by an external drive source The intermediate aggregates and water, which are used waste concrete, are put at the same time, and the main body is rotated and driven by an external driving source, so that the collision and friction between the intermediate aggregates or the intermediate aggregates and the main aggregates, which are crushed waste concrete, is located inside the main body. It provides a method of increasing the shape and quality of waste concrete recycled aggregate, which is made compulsorily and improves the shape and quality.

In addition, a cylindrical body having a space therein, a plurality of idler rolls that support the main body from the bottom and can be installed in place, and the external drive source is installed in such a way that can be rotated in place However, one side of the main body is provided with an input unit and the other side is provided with a discharge unit, the inner space of the main body is made up of a plurality of compartments, the center is formed in the recycled aggregate aggregate and quality improvement device is formed respectively to provide.

At this time, in the case of the input part or the discharge part, it is preferable to easily configure the process of feeding the injected aggregate or water and discharging the treated aggregate or water by installing guiders inside, and the tip portion reaches the inside of the input part if necessary. An aggregate supply port and a water supply port are separately provided so that a cylindrical screen is installed adjacent to the discharge part, a separate brush is installed in contact with the outside of the cylindrical screen, and a water spray nozzle is installed inside the cylindrical screen. A hopper is installed at the bottom of the cylindrical screen.

In addition, a friction member or a plurality of irregularities are installed on the inner circumferential surface of the main body to have a polygonal cross-sectional shape in the longitudinal direction, and a plurality of blades are installed at regular angles in the longitudinal direction so that friction and retention of the aggregates can be achieved. Configure to maximize the effect.

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

The core of the present inventors' standing and quality improvement method is as shown in Figure 4, and the intermediate aggregate that is the waste concrete crushed inside the cylindrical body 60 is configured to be rotated in place by the external drive source 50 and At the same time, the main body 60 is rotated and driven by an external drive source 50, the intermediate aggregates are crushed waste concrete located inside the main body 60, or the intermediate aggregates and the main body 60. The collision and friction between each other is forced to improve the shape and quality.

That is, the intermediate aggregate, which is waste concrete crushed inside the main body 60, when the main body 60 is rotated by the external driving source 50, the intermediate aggregate moves on the inner wall of the main body 60 by its own weight. However, in this process, collision between adjacent intermediate aggregates or between the intermediate aggregates and the inner wall of the main body 60, friction or rolling contact phenomenon occurs, the grinding (crushing), breaking (破 斷) action, and the interparticles thereon The weak particles are broken by the grinding operation, and the fine particles having the angle are discharged to the outside through the discharge unit 90, such as the round spherical shape without the angle. As described above, the above phenomenon is repeated until the aggregate or quality of the aggregate is improved.

In addition, several preferred examples in which the above-described method is embodied in the form of a device are shown in FIGS. 5 to 10, all of which have a cylindrical body 60 having a space therein in common, and the body 60 from below. It consists of a combination of a plurality of idle rolls (70, 72) to support and allow the idle in place, and the external drive source 50 is installed to be capable of rotating the main body 60 in place, the main body ( On one side of the 60 to provide an input unit 80 and the other side to provide a discharge unit 90, the inner space of the main body 60 is made up of a plurality of compartments and the central passage passage 68 is formed, respectively Is done.

At this time, the main body 60 is installed inclined to the main body 60 so that the input portion 80 of the central portion of one side is higher than the discharge portion 90 of the central portion of the other side is discharged the intermediate aggregate introduced through the input unit 80 It is preferable to install the movable part gradually toward the unit 90. Of course, the method of installing the main body 60 inclined is characterized in that the idle roll 72 installed near the input unit 80 side of the idle rolls 70 and 72 is disposed near the discharge unit 90 side ( When looking at the center of the base 100 than 70, the installation height is installed so that the installation height is positioned inclined or otherwise the rotational rollers 70, 72 rotational center between the same, but the idler roller 72 The diameter of the idler roll 70 may be larger than the diameter of the configuration to be installed inclined.

At this time, the plurality of idle rolls (70, 72) is the upper portion of the base (100), respectively in contact with each other and the rotary rail members (74, 76) fixed to the outer periphery of the main body 60 so as to rotate in place, respectively And the idler rolls 70 and 72 form protrusions 71 and 73 inwardly between the rotary rail members 74 and 76, respectively, when the main body 60 rotates. (74,76) is made so as not to leave the idle roll (70,72). The main drive 60 and the base 100 is provided with an external drive source 50 for rotating the main body 60, the external drive source 50, for example, the sprocket wheel on the outer periphery of the main body 60 (52) is fixedly installed and the drive motor (54) is installed on the upper part of the base (100) and the power transmission chain (58) between the sprocket wheel (52) and the sprocket wheel (56) of the drive motor (54). Although not shown separately, it may be configured by selecting an appropriate one such as a gear coupling method or a driving force transmission method by the belt as a power transmission means.

In this case, in the case of the input unit 80 or the discharge unit 90, guiders 82 and 92 are installed on the inner side, respectively, and the process of discharging recycled aggregates or water and feeding intermediate aggregates or water is easily configured. In this case, if necessary, as shown in FIG. 10, the aggregate supply port 84 and the water supply port 86 are separately provided so that the tip portion reaches the inside of the input unit 80 so that feeding can be performed automatically and continuously. It is desirable to be able to.

In addition, the cylindrical screen 94 in the form of a perforated plate, a perforated net, or a sieving net is fixed to each other adjacent to the discharge unit 90, and a separate brush 96 is installed in contact with the outside of the cylindrical screen 94, A water spray nozzle 98 is installed inside the cylindrical screen 94, and a hopper 99 for discharging water and sand is disposed at the lower portion and the discharge portion of the cylindrical screen 94.

In addition, as shown in FIGS. 6 to 8, the inner circumferential surface of the main body 60 is provided with a friction member 62 or a plurality of uneven members 64 to have a polygonal cross-sectional shape in the longitudinal direction. And also, by installing a plurality of wings 66 each at a predetermined angle in the longitudinal direction is configured to maximize the friction and retention effect of the aggregate. At this time, in the case of the wing 66, the friction member 62 or the concave-convex member 64 are installed to be adjacent to each other by varying their lengths, or the installation method is also inclined to the friction member 62 or the concave-convex member 64. It is preferable that the intermediate aggregate located inside at the time of rotation of the main body 60 to have more grinding, retention and breaking effects.

In the case of the device made in this way, it is possible to install and use as a production line or a separate processing device for crushing the waste concrete to produce recycled aggregate, when used in the production line for producing recycled aggregate, Figures 1 to 3 It is preferable to install in the process after separating the sand or fine aggregate generated in the crushing process from the waste concrete crushed while passing through various crushers (7, 15, 35, 41) shown in.

The following is a description of the operation process in the case of the present invention made as described above.

First, the main body 60 is rotated in place by the external drive source 50, and the input unit 80 supplies the intermediate aggregates, which are waste concrete, which is crushed in the pretreatment process through the aggregate supply unit 84, and the water supply unit ( When the water is supplied together through 86, the rider 82 moves through the inlet 80 and gradually moves through the central passage 68 to the inner partitioned space of the main body 60. do. At this time, the crushed waste concrete-type intermediate aggregate and the water which is fed to the inside of the partitioned space stays on the floor by the friction member 62 or the uneven member 64 due to the continuous rotation of the main body 60. When it reaches a position that can no longer be held, aggregates that were overlapped in the upper, lower or inner and outer states are rolled downward while being entangled with each other and are then moved downward again. In addition, in the case where the blades 66 are provided, these blades 66 continuously retain the internal intermediate aggregates or friction between the intermediate aggregates or between the intermediate aggregates and the friction member 62 or the uneven member 64. When it reaches the position where it is impossible to stay, it pours back down and entangles the upper part of the friction member 62 or the uneven member 64, has a passage 68, and is located in the middle of the interior of the main body 60. While passing through the installed partitions sequentially go through the above-described operation process and is gradually moved to the discharge unit 90 side.

Thus, the above-described operations such as grinding, staying, breaking, etc. are repeatedly performed by the rotation operation of the main body 60, and the fragile portions generated by the sharp edges or internal cracks of the intermediate aggregate generated in the shredding process are worn and separated. It is changed into a spherical shape formed into a spherical shape, and also cement or mortar attached to the surface of the intermediate aggregate is separated from the intermediate aggregate by the grinding action between the intermediate aggregates, and cement or mortar is attached to the recycled aggregate. By greatly reducing the rate it is possible to greatly improve the quality of the recycled aggregate.

Of course, the recycled aggregate having the improved shape of the aggregate and the quality of the aggregate is moved to the inside of the outer cylindrical screen 94 by riding the guide 92 of the discharge unit 90, and the cylindrical screen 94 is also While rotating together with the main body 60, foreign substances such as sand, cement, water, etc. generated with the recycled aggregate in the above-described processing are discharged separately through the hopper 99 at the bottom via the screen 94, wherein the regeneration Fine particles such as sand or cement, which are buried on the surface of the aggregate, are washed by water sprayed from the spray nozzle 98, and in the process, the fine powder is inserted into the screen 94 and partially blocked. The blockage is blocked by the installed brush 96 to solve the problem. Only the recycled aggregate having the improved shape and quality is passed through the cylindrical screen 94. It is discharged to be able to use a recycled aggregate.

Therefore, according to the present invention, the problems occurring in the production process of the conventional recycled aggregates are completely solved, and the granules in the process of crushing the waste concrete during the production of the recycled aggregates have a crushed stone shape. It is poor in the form of mortar, and has a large amount of mortar, and has a high proportion of curbs, and a large amount of fine particles such as cement and sand are attached to the surface of the aggregate, thereby greatly improving the shape of the aggregate. It effectively removes cement and mortar attached to the surface, and greatly reduces the ratio of curbstones, thereby dramatically improving the quality of recycled aggregates, which can be used as base and surface asphalt concrete, as well as a wide range of other aggregates. It becomes usable.

In addition, according to the present invention, while improving the shape of the intermediate aggregate of the crushed waste concrete more effectively and at the same time the surface treatment is made between the intermediary aggregates or the internal components of the interior of the body 60, friction member 62 or uneven member (64) In addition, operations such as grinding, staying, and breaking with the wings 66 are made more effectively, and the main body 60, the external drive source 50, and other related configurations are relatively simple, making the production easy and convenient to operate. In the case of adopting the screen 94, the brush 96, and the spray nozzle 98, the fine aggregate such as sand or cement, which is generated in the process of improving the shape or surface treatment of the intermediate aggregate, is continuously separated. Or cleaning can greatly improve the efficiency of operation.

Claims (11)

In the method of producing recycled aggregates by crushing and sorting using waste concrete among various construction wastes, Simultaneously inserting the intermediate aggregate, which is crushed concrete, and water into the cylindrical body, which is configured to rotate in place by an external driving source, and crushing located inside the main body as the main body rotates by an external driving source. Molding and quality improvement method of recycled concrete recycled aggregates, characterized in that the impact and friction between the particles of the intermediate aggregates of the waste concrete, or the particles and the main body is forcibly made to improve the granulation and quality of the aggregates Cylindrical body 60 having a space therein, a plurality of idler rolls 70 and 72 supporting the main body 60 from below and revolving in place, and rotating the main body 60 in place. It is made of a coupling form of the external drive source 50 is installed to be possible, on one side of the main body 60 to provide an input unit 80 and the other side to provide a discharge unit 90, the main body 60 The interior space is made of a plurality of compartments, the center of the passage 68 is formed, the riser and quality improvement device of the recycled concrete, characterized in that formed each. The method of claim 2, The main body 60 is formed by inclining the main body 60 so that the inlet 80 at one side of the center is located higher than the outlet 90 at the other side of the center of the concrete and improved quality of the recycled aggregates Device. The method of claim 2, The plurality of idle rolls 70 and 72 are respectively installed to be rotatable in place in contact with the rotary rail members 74 and 76 fixed to the outer circumference of the main body 60 as upper portions of the base 100. The idler rolls 70 and 72 form protrusions 71 and 73 inwardly between the rotary rail members 74 and 76, respectively, to rotate the main body 60 when the main body 60 rotates. 74, 76) The riser and quality improvement device of the recycled concrete aggregate, characterized in that not to be separated from the idle roll (70, 72). The method of claim 2, The external drive source 50 is fixed to the sprocket wheel 52 on the outer periphery of the main body 60, the drive motor 54 is installed on the upper portion of the base 100, the sprocket wheel 52 and the drive motor 54 The sprocket wheel (56) of the power transmission chain (58) is installed, characterized in that the construction of the recycled aggregate aggregate and quality improvement device. The method of claim 2, A granular and quality improvement apparatus for waste concrete recycled aggregates, which is configured by installing guiders 82 and 92 inside the input unit 80 and the discharge unit 90, respectively. The method according to claim 2 or 6, The aggregate and quality improvement apparatus of the recycled concrete recycled aggregate, characterized in that the aggregate supply port 84 and the water supply port 86 are provided separately so that the tip portion reaches the inside of the input portion 80. The method of claim 2, The cylindrical screen 94 is fixed to each other so as to be adjacent to the discharge unit 90, and a separate brush 96 is installed to contact the outside of the cylindrical screen 94, and water is provided inside the cylindrical screen 94. Forming and quality of the recycled concrete recycled aggregate, characterized in that the injection nozzle 98 is installed, and the hopper 99 for discharging water and sand is installed at the lower part and the discharge part of the cylindrical screen 94. Improvement device. The method according to claim 2 or 3, The inner space of the main body 60, the inner peripheral surface is provided with a friction member 62 so as to have a polygonal cross-sectional shape in the longitudinal direction, and a plurality of wings 66 each at a predetermined angle in the longitudinal direction, characterized in that the closed Standing and surface improvement device for concrete recycled aggregate. The method according to claim 2 or 3, As the inner space of the main body 60, the inner circumferential surface is provided with a plurality of concave-convex members 64 in the longitudinal direction, and a plurality of blades 66 are provided for each predetermined angle in the longitudinal direction, respectively. Standing and surface improver. The method of claim 9 or 10, The plurality of blades 66 are adjacent to each other in different lengths, and the inclined and surface improving apparatus of the recycled concrete aggregate, characterized in that the inclined to the friction member 62 or the concave-convex member (64).