KR20120052617A

KR20120052617A - System sorting crushed aggregates

Info

Publication number: KR20120052617A
Application number: KR1020100113860A
Authority: KR
Inventors: 손선익
Original assignee: 주식회사 우일엔지니어링
Priority date: 2010-11-16
Filing date: 2010-11-16
Publication date: 2012-05-24

Abstract

PURPOSE: A system for classifying crushed stone-based aggregate is provided to cost effectively implement purification and prevent environmental pollution by classifying sand from rock powder and soil powder. CONSTITUTION: A system for classifying crushed stone-based aggregate includes a conveyor(10) and a blower(20). One end part of the conveyor is installed at a high position compared to the surface of the ground such that crushed stone-based aggregate is transferred and dropped to the surface of the ground. The blower is installed at one lower side of the conveyor. The blower blows wind toward dropping crushed stone-based aggregate. Components contained in the crushed stone-based aggregate are dropped at different positions based on the specific gravity difference of the components.

Description

System sorting crushed Aggregates

The present invention relates to a system for sorting by wind the components contained in crushed aggregates, that is, aggregates obtained by crushing rocks, and more particularly, a system for sorting sand contained in crushed aggregates by using wind. It is about.

Recently, large-scale housing complex construction and road construction are being carried out, so there is a shortage of aggregates, which are one of the main construction materials. Among these aggregates, sand, which is fine aggregate having a diameter of 5 mm or less, is used as one of important materials in construction work.

Among the sands, in particular, instructors (江砂) and maritime (海 () is useful as a building material, but is almost exhausted in our country, such natural aggregates have a lot of restrictions due to environmental problems. Thus, although a large amount of sand is imported and used as an alternative, there is a disadvantage that the cost is not formidable.

Accordingly, in recent years, the frequency of use of crushed aggregates crushed rock has been increasing, and a number of techniques for sorting sand from crushed aggregates are also disclosed. The process of producing and screening crushed aggregates basically consists of a process of crushing rocks and a process of sorting aggregates by size using a screen. In this case, the crushed aggregate may be screened into fine aggregates having a diameter of 5 mm or less and coarse aggregates having a diameter of 5 mm or more by the screen, and the thick aggregates may be 5-10 mm, 10-20 mm, 20-25 mm, etc., depending on the screen. It can be selected by the size of.

By the way, the fine aggregate of 5 mm or less obtained by crushing rock contains a large amount of stone powder and earth powder in addition to sand. Soil powder is a fine powder of fine particles contained in rocks, and stone powder refers to the final by-product generated from making rocks into crushed stone. Therefore, in order to obtain pure sand only, a separate process of removing stone powder and soil powder is required.

In this regard, conventionally, a method of separating stone powder and soil powder from sand by washing the fine aggregate containing sand, stone powder and soil powder with water has been used. When water is added to the fine aggregate, this method is applied because the stone powder and soil powder are washed with water and only sand remains.

However, the method of washing fine aggregates with water has a problem that pollution of rivers and groundwater is severe due to wastewater, and there is a problem that additional costs and energy are consumed to purify the fine aggregates.

The present invention has been made to solve the above-mentioned problems, the object of the present invention is to provide a system that can select the crushed aggregates by using the wind so that no additional cost or energy consumption for waste water generation or waste water purification. have.

An object of the present invention described above, a conveyor is installed so that one end has a predetermined height from the ground to fall to the ground after the crushed aggregate is transported, and one end of the conveyor is installed to have a predetermined height from the ground below one end of the conveyor Including a blower for discharging the wind toward the crushed stone aggregate falling from, the crushed aggregate characterized in that the dropping point of the components contained in the crushed stone aggregate by the wind discharged from the blower depends on the difference in specific gravity It can be achieved by providing a screening system of.

According to a preferred feature of the present invention, the crushed aggregate contains sand, stone powder and earth powder, the ground powder and soil powder having a relatively low specific gravity is subjected to a curved motion by the force in one direction by the wind discharged from the blower They fall to the ground and are separated from the relatively heavy sand and are accumulated on the ground.

According to another preferred feature of the invention, the blower is installed in a plurality of spaced apart from each other, the rpm is increased sequentially as the height from the ground is lowered.

According to another preferred feature of the invention, it may further include a controller that can adjust the rpm of the blower.

According to another preferred feature of the present invention, it may further include an intake device which is installed at the same height as the blower on the other side of the lower one end of the conveyor so that the crushed aggregate falls between the blower.

According to another preferred feature of the present invention, the intake apparatus is separated from the suction pipe facing the blower, the discharge pipe through which the air sucked through the suction pipe is discharged, and the stone dust and earth powder sucked together with the air to the suction pipe from the air It has a cyclone dust collector which is mounted therein to be disposed therein, and a dust discharge pipe which is formed below the cyclone dust collector for the discharge of the stone powder and the soil powder separated from the air by the cyclone dust collector.

According to another preferred feature of the present invention, the scattering is provided in the upper portion of the intake apparatus so that the stone powder and soil powder separated from the sand by the blower is prevented from being scattered to the upper portion of the intake apparatus without being sucked into the intake apparatus The prevention film may further include.

According to the sorting system of the crushed aggregate according to the present invention, the sand can be sorted by discharging the wind to the falling crushed aggregate so that the sand and the stone powder and soil separated by the difference in specific gravity and stacked on the ground, thereby preventing environmental pollution And no additional cost and energy is consumed for purification.

In addition, since a plurality of blowers are installed, the efficiency of separating the stone powder and the soil powder can be improved. Furthermore, as the height from the ground decreases, the rpm of the blower can be increased sequentially so that even if the powder powder and the soil powder are separated from different heights, Since the approximate fall point can be formed, the stone powder and earth powder can be accumulated in a certain range on the ground, so that the post-treatment is easy.

In addition, since the user can adjust the rpm of the blower to determine the strength of the wind, there is an effect that can be appropriately applied according to the type or size of the crushed aggregate.

In addition, by installing the intake apparatus at the same height as the blower, it is possible to inhale the stone powder and soil powder separated by the blower, and furthermore, it is possible to remove the stone powder and soil powder by a cyclone dust collector provided inside the intake apparatus.

In addition, since the scattering prevention film is mounted on the intake apparatus, external scattering of the stone powder and the soil powder which has not been sucked into the intake apparatus can be prevented.

1 is a block diagram showing the entire process of screening crushed aggregates by applying a screening system for crushed aggregates according to an embodiment of the present invention.
Figure 2 is a conceptual diagram showing a screening system for crushed aggregates according to an embodiment of the present invention.
3 is a conceptual diagram of the intake apparatus shown in FIG.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. It is to be understood, however, that the embodiments described below are only for explanation of the embodiments of the present invention so that those skilled in the art can easily carry out the invention, It does not mean anything.

1 is a block diagram showing the entire process of crushing rock to screen the crushed aggregates. As shown, the process of screening the crushed aggregate is a process of inputting the rock into the hopper, the process of crushing the rock put into the hopper with a crusher, the process of screening the crushed stone using a screen, and the selected crushed stone The process of sorting sand by removing stone powder and soil powder from the soil.

Preferably, the process of crushing the rock is composed of a primary crushing process and a secondary crushing process, and the crushed stone is screened by the screen for each crushing process. Particularly, in the secondary crushing process, a vibration screen is applied. In each crushing process, the crushed stone that has not passed through the screen is transferred to the crusher again, and then crushed to pass through the screen.

The crushed aggregate screening system according to the present invention is intended for crushed stone passed through screens, especially vibrating screens. Preferably, fine aggregate having a size that passes through all 10 mm sieves and passes by 85% or more by weight in 5 mm sieves Although covered, coarse aggregates of 5 mm or more in diameter may also be applied.

A screening system for crushed aggregate according to an embodiment of the present invention will be described with reference to FIGS. 2 and 3.

As shown in FIG. 2, the crushed aggregate sorting system includes a conveyor 10 and a blower 20 to discharge wind by dropping the crushed aggregate into the falling stones according to the difference in specific gravity of the components contained in the crushed aggregate. It is to be screened so that the point is different, and preferably may further include an intake device 30 and the anti-scattering film (40).

The conveyor 10 serves to transport the crushed aggregate 1 that is crushed by the crusher and passed through the vibrating screen. Since the conveyor 10 should fall to the ground after the crushed aggregate is transported, one end is installed to have a predetermined height on the ground. In this case, although the conveyor 10 may be installed so that both ends are horizontal, it is preferable that the conveyor 10 is installed to be inclined as shown in FIG. 2. Therefore, the crushed aggregate 1 conveyed by the conveyor 10 falls to the ground after reaching one end of the conveyor 10.

The blower 20 serves to discharge the wind toward the crushed aggregate falling from one end of the conveyor 10 so that the falling point is changed by the difference in specific gravity. Therefore, the blower 20 is installed below one end of the conveyor 10 and is installed to have a predetermined height from the ground.

The blower 20 includes a discharge tube (not shown) that is formed to face the falling crushed aggregate, a suction tube (not shown) that is formed to suck air from the rear, and a driving motor (not shown). It may be made of a configuration having a), but in addition to this may be applied without limitation if the blowing means that can provide wind.

When the crushed aggregates are fine aggregates of 5 mm or less, they contain sand, stone powder, and soil powder, which have a relatively high specific gravity (approximately 2.6 to 2.9), and stone powder and soil powder having a smaller specific gravity than sand. Therefore, when the wind is discharged by the blower 20 to the crushed aggregate falling to the ground, the sand is almost unaffected and the vertical fall, and some of the sand is curved by the force of the wind, the difference in the falling point Although it may occur, the effect is insignificant, and the stone powder and soil powder (3) have a relatively low specific gravity, so they receive horizontal force in one direction by the wind, so they fall to the ground while performing a curved movement without free fall motion. The dropping point is different from the sand (2). Therefore, the stone powder and soil powder 3 is separated from the sand (2) is to be accumulated on the ground.

One blower device 20 may be provided, but a plurality of blowers 20 may be installed at a height spaced apart from each other. When a plurality of blowers 20 are installed, the second and third winds can be discharged to the stone powder and the soil that fall with the sand without being separated by the blower installed at the highest height from the ground, thereby improving the sorting efficiency. It can increase.

Here, it is more preferable that the plurality of blowers 20 sequentially increase in rpm as the height is lowered from the ground. This is to ensure that the falling points of the stone powder and the soil powder separated by the wind discharged from each blower 20 are within a certain range. As the powder and soil powder falls, the drop speed increases as it gets closer to the ground. If the strength of the wind discharged from the blower 20 is the same, the stone powder separated by each blower 20 having a different height and The fall point of the soil is different. Therefore, if the strength of the wind discharged to the blower 20 installed close to the ground is harder, it can fall to a somewhat approximate position. Accordingly, stone powder and earth powder can be accumulated within a certain range on the ground, so that collection for post-treatment is possible. It is easy.

In addition, although not shown, a controller capable of adjusting the rpm of the blower may be provided. One embodiment of the present invention is intended for fine aggregates, but may also be applied to a state in which coarse aggregates are included, in which case, the strength of the wind discharged from the blower should be stronger than that of fine aggregates alone. . Therefore, the controller is provided so that the user can adjust the intensity of the wind discharged from the blower as needed.

The intake device 30 serves to assist the separation of the stone powder and the soil powder by the blower 20. That is, the intake device 30 is provided on the other side of one end of the conveyor 10 to suck the surrounding air of the falling crushed aggregate, so that the suction force is exerted on the relatively small specific gravity and clay powder among the crushed aggregate.

In this case, the intake device 30 is preferably installed at approximately the same height as the blower 20, may be installed in the same number as the blower 20, the crushed aggregate is blower 20 and the intake device ( It falls between 30). Therefore, as the blower 20 located on one side of the falling crushed aggregate discharges the wind toward the crushed aggregate, and the intake device 30 located on the other side of the crushed aggregate falls intakes ambient air, the crushed stone in the crushed aggregate And the soil powder is dropped while performing a curved movement under the influence of the output power of the blower 20 and the suction force of the intake device 30, so that the almost vertical drop is accumulated on the ground of the sand and other positions.

The conceptual diagram regarding the intake apparatus 30 is shown in FIG. As shown, the intake device 30 is made of a hollow shape having a suction pipe 31 and the discharge pipe 32, the motor 33 for air intake and discharge is mounted therein.

In this case, when the intake apparatus 30 sucks the surrounding air, the dust and clay may be sucked in addition to the air. In this case, the dust and the clay may be discharged together with the air to the discharge pipe 32 as it is. Occurs.

In order to solve this problem, the intake device 30 is a means for separating and discharging the stone powder and earth powder from the air therein, and preferably has a cyclone dust collector 34 and a dust discharge pipe 35. Cyclone dust collector 34 is to use the vortex and centrifugal force to separate the stone powder and soil powder having a higher specific gravity than air. The dust discharge pipe 35 is formed to be located below the cyclone dust collector 34. When air, stone powder and soil powder are sucked together by the suction pipe 31, the air, stone powder and soil powder are separated by the difference in specific gravity by the cyclone dust collector 34, and the air is discharged through the discharge pipe 32 and the dust and soil powder is dusted. It is discharged through the discharge pipe (35).

On the other hand, when the intake device 30 is affected by the stone powder and soil powder of the crushed aggregate as the intake of the ambient air, it is not sucked into the suction pipe 31 of the intake device 30 is scattered to the upper portion of the intake device 30 The phenomenon cannot be ruled out. Therefore, in order to prevent the scattering of the stone powder and earth powder, a scattering prevention film 40 may be provided on the intake apparatus 30 as shown in FIG. 2.

The scattering prevention film 40 is not particularly limited in shape, but may be any shape as long as the scattering prevention film 40 is blocked to be scattered to the rear beyond the upper portion of the intake apparatus 30. And the stone powder and earth powder scattered below the suction pipe 31 of the intake device 30 is not a problem in particular, and if a plurality of intake device 30 is installed, because it can be sucked into the intake device located below, The prevention film 40 may be provided so as to be located only in the upper portion of the intake apparatus 30. In this case, as shown in Figure 2 it is preferable that the anti-scattering film 40 is mounted on the upper portion of the intake apparatus 30, but may be mounted on a support of a predetermined height that is installed on the ground, although not shown.

Referring to FIGS. 1 and 2, a process of selecting crushed aggregates by the crushed aggregates sorting system according to an embodiment of the present invention will be described below.

First, the crushed aggregate, in particular fine aggregate, obtained by crushing by a crusher after the rock is put into a hopper (not shown) is conveyed by the conveyor 10, and once it reaches one end of the conveyor 10 to fall to the ground. do.

The blower 20 discharges the wind toward the crushed aggregate falling to the ground, and the suction device 30 sucks the surrounding air. As a result, the sand of the falling aggregate aggregates on the ground within a predetermined range while falling substantially vertically, but the stone powder and the clay powder are subjected to a constant curved motion under the influence of the output power of the blower 20 and the suction power of the suction device 30. As it falls to the ground and accumulates on the ground at a different position from the sand, the sand is sorted with stone powder and soil powder.

Moreover, the blower 20 is stronger in the blower installed at a lower position with respect to the stone powder and soil which are not separated from the blower installed at the higher position, since the rpm increases as the plurality is installed and especially the height from the ground is lowered. The wind is discharged by the intensity, and the stone powder and soil powder separated by each blower are accumulated within a predetermined range on the ground.

10: conveyor
20: blower
30: intake apparatus
31: suction pipe
32: discharge pipe
33: motor
34: cyclone dust collector
35: dust discharge pipe
40: shatterproof film

Claims

A conveyor installed at one end to have a predetermined height at the ground to fall to the ground after the crushed aggregate is transferred; And
A blower installed at a lower side of the one end of the conveyor to have a predetermined height from the ground and discharging wind toward the crushed stone aggregate falling from one end of the conveyor; and including the blower to discharge the wind from the blower. A crushed aggregate screening system, characterized in that the dropping point of the contained component is changed according to the difference in specific gravity.

The method according to claim 1,
The crushed aggregate contains sand, stone powder and earth powder, and relatively small specific gravity powder and earth powder are forced to one direction by the wind discharged from the blower and fall to the ground while moving in a curved motion. A crushed aggregate sorting system, characterized in that it is separated from large sand and accumulated on the ground.

The method according to claim 2,
The blower is installed in a plurality of mutually spaced apart height of the crushed stone aggregate system, characterized in that the rpm increases sequentially as the height is lowered from the ground.

The method according to claim 3,
Crushed aggregate sorting system further comprises a controller that can adjust the rpm of the blower.

The method according to any one of claims 2 to 4,
And an intake apparatus installed at the same height as the blower on the other side of the lower end of the conveyor so that the crushed aggregate falls between the blower and the blower.

The method according to claim 5,
The intake apparatus includes a suction pipe facing the blower, a discharge pipe through which the air sucked through the suction pipe is discharged, and a cyclone dust collector mounted therein to separate the stone dust and the earth powder sucked with the air into the suction pipe from the air; And a dust discharge pipe formed below the cyclone dust collector for discharge of the stone powder and the soil powder separated from the air by the cyclone dust collector.

The method according to claim 5,
Stone crushed stone and soil separated from the sand by the blower is not inhaled by the intake device, it is characterized in that it further comprises a shatterproof film provided on the upper portion of the intake apparatus to prevent scattering to the top of the intake apparatus Screening system for aggregates.