KR102439763B1 - Wet sand classifying and dehydrating method for wet type sand plant, and facilities using the method - Google Patents

Abstract

The present invention relates to an apparatus and method capable of simultaneously separating and dewatering sand or minerals in a wet manner, in which a sand dewatering net is provided at the lower part of the sorting net of a conventional wet screen for sorting, and a water storage tank is provided at the lower part of the dewatering net. A sand pump is installed in the storage tank, and a wet cyclone is connected to the sand pump outlet with a pipe. Screen-type sand sorting and dewatering facilities are provided.

Description

A method of wet sorting and dewatering of sand in a wet spinning plant, and equipment to which such method is applied

The present invention relates to an apparatus and method for manufacturing sand or refining minerals in a wet manner, and more particularly, to an apparatus and method capable of dewatering sand or minerals in a wet manner at the same time.

In general, sand is used for the manufacture of concrete. As such, the sand required for the construction industry was mainly collected from the river bed. And as the sand that can be collected from the river is depleted, the amount of sand used after collecting and desalting the sand from the sea has increased. However, since the seabed is the basis of the fish resources where the rich nutrients are mixed and reefs are formed, fishermen are increasingly concerned that these fish stocks may be damaged and depleted if sand is collected from the seabed. Eventually, as the amount of sand harvested from the sea increased, opposition from fishermen became intense, and the government and local governments came to a ban on collecting sand from the sea.

Accordingly, it has now come to procurement of sand by crushing pungam or gangam to make sand. If the raw rock for sand production is clean and free from moisture, the rock is crushed and the sand particles are sorted, and then the soil or fine powder contained in the sand particles is removed using a dust collection facility using wind and bag filters (sand). manufacturing) equipment can be used. However, since it is very difficult to obtain rocks without moisture in their natural state, rocks taken from the natural state have no choice but to retain considerable moisture. had no choice but to

Accordingly, wet sand production facilities (wet milling plants) that crush pungam or gangam to the size of sand and wash them with water to remove soil components have been established as major sources of sand.

Referring to FIG. 4 , the wet spinning plant includes a crushing facility 70 , a sand sorting facility (wet screen) 80 , a turbid water removal facility (dewatering facility, sand unit) 90 , and a wastewater treatment facility.

The crusher 70 includes a hopper 71 , a feeder 72 and a crusher 73 .

The hopper 71 is a facility for receiving and temporarily storing sand raw materials, that is, raw stones.

The feeder 72 is a facility that supplies the sand raw material stored in the hopper to the system by a certain amount per unit time.

The crusher 73 is a device for crushing the raw sand material supplied by the feeder to the size of sand. As a crusher, a cone crusher, an impact crusher, etc. can be used.

The wet screen 80 wet-selects particles suitable for use as sand from raw materials supplied through a conveyor belt 81 or the like from a hopper or crusher. The wet screen 80 includes an inclined screen network 83 that performs an inclined circular vibration. The mesh of the inclined screen network 83 is sized to allow sand to fall out, and since the sand or sand raw material placed on the inclined screen network 83 is washed with the water of the shower unit 82, a large amount of turbid water mixed with sand is generated. . The oversized aggregate that did not pass through the inclined screen network 83 is returned to the crushing facility 70 through the return conveyor belt 84, and the sand and turbid water that have passed through the inclined screen network 83 are transferred to the first hopper (85). is temporarily stored in

The turbid water removal facility 90 separates turbid water from the mixture of sand and turbid water. As the turbid water removal equipment, a wet cyclone or a screw classifier may be used. Referring to FIG. 4 as an example, the sand and turbid water stored in the water storage tank 91 through the pipe 86 in the first hopper 85 are about 2 bar through the sand pump 92. It is pressurized by the force of the and sent to the wet cyclone (93). The wet cyclone 93 separates a large amount of turbid water and discharges it to the second outlet 932 to send it to a wastewater treatment facility. In addition, sand and a small amount of turbid water are discharged through the first outlet 931 . Since the sand obtained by separating a large amount of turbid water from the wet cyclone 93 or the screw classifier still contains a small amount of turbid water, a dewatering screen network 94 for further reducing the content of the turbid water may also be used. The sand selected through the dewatering screen network 94 is shipped through the shipping conveyor belt 95 . In addition, the turbid water and a small amount of fine sand separated from the dewatering screen network 94 may be re-separated through the wet cyclone 93, and the separated turbid water may also be sent to a wastewater treatment facility.

The sand unit 90 has a small size, a large processing capacity, and an excellent function of separating sand and soil compared to a conventionally used turbid water and sand separation device such as a screw classifier. However, in order to suck in heavy sand with water and supply it to the wet cyclone 93 at high pressure, the sand pump 92 has no choice but to consume a lot of power (about 100 to 200 horsepower). In addition, the sand coming out of the wet screen 80 has a maximum size of 4 to 6 mm, and this coarse sand severely erodes the impeller or casing of the sand pump 92, the inner surface of the wet cyclone 93, and various piping pipes or hoses. . For this reason, pump parts have to be replaced frequently, and the inner surface of the wet cyclone has no choice but to be re-lined, but these parts and work are expensive and require a lot of time for replacement and maintenance. In particular, in order to replace the parts of the sand pump, the entire plant must be shut down, so the damage is considerable.

On the other hand, the dewatering screen net 94 used in the sand unit 90 is installed to have a reverse slope in which the height of the screen net increases gradually when viewed in the direction in which the sand advances, in order to increase the dewatering efficiency. When the screen is installed in this form, it is necessary to generate strong reciprocating vibration in the inclined direction, so the price of the vibrator is higher than that of the conventional inclined circular vibrating screen or the horizontal screen, and the power consumption is large.

In addition, the wet screen 80 for sorting sand by wet has a large size and a high installation height. In addition, the conveyor belt 81 for supplying the sand raw material to the first screen net 83 also occupies a large area because the length increases in proportion to the height of the first screen net 83 . As such, since the area occupied by the wet screen 80 is significant, and the installation area occupied by the sand unit 90 described above is also significant, wet spinning in which the wet screen 80 and the sand unit 90 are separately installed as in the prior art Plants also require a large footprint.

The present invention has been devised to solve the above problems, and it is an object of the present invention to provide a method for wet sorting and dewatering of sand that can prevent a sand pump and a wet cyclone from handling a large amount of sand in a wet spinning facility, and a facility to which the same is applied do it with

An object of the present invention is to provide a method for wet sorting and dewatering of sand capable of constructing a wet spinning plant capable of reducing the installation area occupied by a wet screen and a sand unit of a wet spinning facility, and a facility to which the same is applied.

An object of the present invention is to provide a method for wet sorting and dewatering of sand capable of constructing a wet spinning plant that enables additional sorting of aggregates without increasing the area in a wet spinning facility, and a facility to which the same is applied.

In order to solve the above problems, in the present invention, the first aggregate sorting unit 20 and the sand dewatering unit 50 are stacked up and down, and the sand and turbid water dropped from the first aggregate sorting unit 20 are sand dehydrated. A sand sorting and dewatering complex facility 10 is provided in which the sand is first dewatered through the unit 50 and the sand is sorted, and turbid water and a small amount of sand are supplied to the wet cyclone after sorting. That is, in the sand sorting and dewatering complex facility 10 , the first aggregate sorting unit 20 may be a sand sorting unit for sorting sand.

The first aggregate sorting unit 20 may include a first screen network 23 , a crushed stone transfer unit 21 , a first water supply unit 25 , and a return transfer unit 24 . The first aggregate sorting unit 20 may be a so-called wet screen type.

The first screen network 23 may filter oversized aggregate larger than sand and pass the sand downward. Most of the coarse sand may pass downward through the first screen network 23 .

The crushed stone transfer unit 21 may supply crushed stone for sorting to one end of the first screen network 23 . The crushed stone transfer unit 21 may be a conveyor belt for conveying crushed stones crushed by the crushing facility to the first screen network 23 .

The first water supply unit 25 may supply water to the crushed stone supplied from the crushed stone transfer unit 21 .

The return transfer unit 24 may be provided at the other end of the first screen network 23 to return the oversized aggregate that did not pass through the first screen network 23 to the crushing facility. The return transfer unit 24 may be a conveyor belt.

The sand dewatering unit 50 may include a second screen network 54 , a chute water storage tank 51 , a sand pump 52 , a wet cyclone 53 , and a sand shipping unit 55 .

At least a portion of the second screen network 54 may be disposed vertically below the first screen network 23 . Accordingly, the second screen network 54 can receive the sand and turbid water that have passed through the first screen network 23 and have fallen. The second screen network 54 may be a dewatering screen network that filters sand and passes turbid water downward.

The second screen network 54 filters a large amount of sand, but a small amount of fine sand can pass therethrough. That is, coarse sand is filtered through the dewatering screen network, and most fine sand is also filtered, but a small amount of fine sand can be passed downward. In other words, turbid water and a portion of fine sand may pass downward through the dewatering screen network.

The chute water tank 51 may be disposed under the second screen network 54 to temporarily store the turbid water and a small amount of sand.

The sand pump 52 may suck in the turbid water and fine sand of the chute storage tank 51 and discharge it under pressure. The sand pump 52 is connected to the lower end of the chute storage tank 51 and can suck turbid water and a small amount of fine sand descending on the slope of the chute storage tank 51 .

The wet cyclone 53 may have a first outlet 531 and a second outlet 532 . The turbid water discharged from the sand pump 52 and a small amount of sand may be introduced into the wet cyclone 53 . The wet cyclone 53 may select a sand component from the introduced turbid water and discharge it to the first outlet 531 together with a small amount of turbid water to supply it onto the second screen network 54 . The wet cyclone 53 may discharge a large amount of turbid water from the introduced turbid water except for the turbid water discharged to the first outlet 531 to the second outlet 532 .

The turbid water discharged through the second outlet 532 may be sent to a wastewater treatment facility.

The sand shipping unit 55 may be provided at an end of the second screen network 54 to ship sand dehydrated by the second screen network 54 . The sand delivery unit 55 may be a conveyor belt.

In addition, in the present invention, the first aggregate sorting unit 20, the second aggregate sorting unit 40, and the sand dewatering unit 50 are stacked up and down, and dropped from the first aggregate sorting unit 20. Aggregate and sand are sorted by the second aggregate sorting unit 40, and sand and turbid water dropped from the second aggregate sorting unit 40 are dewatered through the sand dewatering unit 50 first to select sand, and turbid water after sorting and a sand sorting and dewatering complex facility (10) in which a small amount of fine sand is supplied to the wet cyclone. In the sand sorting and dewatering complex facility 10 , the second aggregate sorting unit 40 may be a sand sorting unit for sorting sand.

The first aggregate sorting unit 20 may include a third screen network 26 , a crushed stone transfer unit 21 , a first water supply unit 25 , and a return transfer unit 24 . The first aggregate sorting unit 20 may be a so-called wet screen type.

The third screen mesh 26 has a mesh of the first standard larger than that of sand. Therefore, the third screen network 26 may filter oversized aggregate larger than the first standard, and pass aggregates equal to or smaller than the first standard through downwards.

The crushed stone transfer unit 21 may supply crushed stone for sorting to one end of the third screen network 26 .

The first water supply unit 25 may supply water to the crushed stone supplied from the crushed stone transfer unit 21 .

The return transfer unit 24 may be provided at the other end of the third screen network 26 to return oversized aggregate that has not passed through the third screen network 26 .

The second aggregate sorting unit 40 may include a fourth screen network 43 and an aggregate shipping unit 44 .

At least a portion of the fourth screen network 43 may be disposed vertically below the third screen network 26 to receive aggregate and sand falling through the third screen network 26 . The fourth screen network 43 may be the same screen network as the first screen network 23 . That is, the fourth screen network 43 may filter aggregate larger than sand and pass the sand downward.

The aggregate shipping unit 44 may be provided at the end of the fourth screen network 43 to ship aggregate that has not passed through the fourth screen network 43 . The fourth screen network 43 may be a network corresponding to the first screen network 23 .

The sand dewatering unit 50 may include a fifth screen network 57 , a chute water storage tank 51 , a sand pump 52 , a wet cyclone 53 , and a sand shipping unit 55 . The fifth screen network 57 may be a network corresponding to the second screen network 54 .

Meanwhile, the second aggregate sorting unit 40 may further include an additional screen network and an additional aggregate shipping unit to further select aggregates of additional specifications.

At least a portion of the additional screen network may be disposed vertically below the third screen network 26 , and at least a portion may be disposed vertically above the fourth screen network 43 . The additional screen network may receive aggregate and sand falling through the third screen network 26 before the fourth screen network 43 . The additional screen network may have a second standard mesh smaller than the first standard and larger than sand. Accordingly, the additional screen network, aggregates larger than the second standard can be filtered, and the aggregate smaller than the second standard can be passed downward.

The additional aggregate shipping unit, provided at the end of the additional screen network may ship the aggregate that did not pass through the additional screen network.

The screen nets may be mounted on the screen net mounting frame 34 . The screen network mounting frame 34 may include a plurality of decks spaced up and down, and side plates 348 for integrally connecting them on the left and right of the plurality of decks. A plurality of the screen networks may be respectively installed on the plurality of decks.

The screen network mounting frame 34 may have a single rigid body structure in which a plurality of decks are integrally connected by left and right side plates 348 .

The screen net mounting frame 34 to which the screen net is mounted may vibrate by a common vibrating device 60 .

The screen including the screen nets and the screen net mounting frame 34 may be spaced apart from the ground by the pillar member 31 on the upper part.

Between the pillar member 31 and the screen mesh mounting frame 34 , a buffer member 33 for mitigating transmission of vibrations of the screen to the pillar member 31 may be provided.

The screen nets may be installed at a regular slope in which the height of the screen net is gradually lowered when viewed in the direction in which the aggregate or sand advances. And the screen network mounting frame 34 may be in a circular vibration (circular vibration).

Alternatively, the screen nets may be installed horizontally. In addition, the screen network mounting frame 34 may reciprocate linearly in a direction obliquely extending at an angle between a horizontal direction and a vertical direction.

The sand dewatering unit 50 may further include a second water supply unit 56 for supplying water to the second screen network 54 .

The second aggregate sorting unit 40 may further include a third water supply unit 45 for supplying water to the fourth screen network 43 .

The second aggregate sorting unit 40 may further include an additional water supply unit for supplying water to the additional screen network.

The present invention also provides a method for screening and dewatering sand.

In the sand sorting and dewatering method, at least a portion of a second screen network 54 that filters aggregate larger than sand and passes sand downward, and filters sand and passes turbid water downward. A preparation step of preparing a second screen network 54 to be disposed vertically below the first screen network 23 and preparing a chute water tank 51 for storing turbid water passing through the second screen network 54 includes Here, the first screen network 23 constitutes a sand sorting unit, and the second screen network 54 constitutes a sand dehydration unit.

In the sand sorting and dewatering method, after the preparation step, crushed stone for sorting is supplied to the first screen network 23 and water is supplied so that sand and turbid water fall through the first screen network 23 . and an oversize screening step of filtering aggregates larger than sand.

In the sand sorting and dewatering method, the second screen network 54 receives the sand and turbid water that have fallen through the first screen network 23, and the turbid water passes through the second screen network 54 and falls. The sand includes a sand dewatering step for filtering.

The second screen network 54 can dehydrate a large amount of sand. A small amount of fine sand may pass along with the turbid water through the second screen network 54 .

In the sand sorting and dewatering method, the turbid water contained in the chute water tank 51 by falling through the second screen network 54 and a small amount of fine sand passing through the second screen network 54 are mixed with a sand pump (52). is supplied to the wet cyclone 53 using The turbid water includes a sand re-selection and turbid water circulation step supplied to the wastewater treatment facility.

The present invention also provides a method for screening and dewatering sand and further screening for aggregate.

The method prepares a third screen net 26 that filters aggregates larger than the first standard (larger than the sand) and passes the aggregates equal to or smaller than the first standard downward, and filters the aggregates larger than the sand. prepares the fourth screen net 43 so that at least a portion of the fourth screen net 43 that passes downward is disposed vertically below the third screen net 26, filters sand and passes turbid water downward The fifth screen network 57 is prepared so that at least a part of the fifth screen network 57 is disposed vertically below the fourth screen network 43 , and the turbid water that has passed through the fifth screen network 57 is stored. It includes a preparation step of preparing the chute water tank 51 to do.

The fourth screen network 43 may have a structure corresponding to the first screen network 23 . The fourth screen network 43 constitutes a sand sorting unit, and the fifth screen network 57 constitutes a sand dewatering unit.

In the method, after the preparation step, crushed stone for sorting is supplied to the third screen network 26 and water is supplied so that aggregate smaller than the first standard falls through the third screen network 26 . and an oversize screening step of filtering aggregates larger than the first standard.

In the method, the fourth screen net 43 receives the aggregate that has passed through the third screen net 26 and the sand falls through the fourth screen net 43, and aggregates larger than the sand Including the step of screening the aggregate to filter.

The method includes the sand dewatering step, fine sand re-sorting and turbid water circulation step.

In the method, in the preparation step, at least a part of the additional screen network that filters aggregates larger than the second standard (size smaller than the first standard and larger than sand) and passes the aggregate smaller than the second standard downward An additional screen network may be further prepared such that it is disposed vertically below the three screen network 26 and at least a portion of the additional screen network is disposed vertically above the fourth screen network 43 .

And in the method, in the aggregate screening step, the additional screen net receives the aggregate that has passed through the third screen net 26, and the aggregate smaller than the second standard falls through the additional screen net, , it is possible to additionally filter aggregates larger than the second standard.

According to the method, the screens can be installed at a normal angle, and the screens can be vibrated in a circle.

According to the method, the screens may be installed horizontally and the screens may be linearly reciprocated in an inclined direction.

According to the present invention, the sand pump and the wet cyclone do not handle a large amount of sand by allowing only the turbid water and some sand that have passed through the second screen net, that is, the dewatering screen net, to be handled by the sand pump and the wet cyclone. Therefore, it is possible to significantly reduce the wear rate of the sand pump, the wet cyclone, and the piping connected thereto due to friction with the sand. In addition, since the wear rate is significantly lowered, the maintenance cycle can be increased, and the equipment operation rate can be further secured. In addition, it is possible to significantly reduce the power consumption of the sand pump.

In addition, according to the present invention, as a result of installing the oversize sorting unit, that is, the wet screen and the sand dewatering unit in a laminated structure, it is possible to significantly reduce the construction area of the facility. In addition, it is possible to reduce or omit equipment required for the equipment, thereby lowering the construction cost of the equipment.

In addition to the above-described effects, the specific effects of the present invention will be described together while describing specific details for carrying out the invention below.

1 to 3 show side views of the first to third embodiments of the sand sorting and dewatering complex according to the present invention of a wet milling plant.
4 is a schematic diagram of a conventional wet spinning plant.

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

The present invention is not limited to the embodiments disclosed below, and various changes may be made and may be implemented in various different forms. Only this embodiment is provided so as to complete the disclosure of the present invention and to fully inform those of ordinary skill in the scope of the invention. Therefore, the present invention is not limited to the embodiments disclosed below, and all changes and equivalents included in the technical spirit and scope of the present invention as well as substituting or adding the configuration of any one embodiment and the configuration of other embodiments to each other or substitutes.

The accompanying drawings are only for easy understanding of the embodiments disclosed in the present specification, and the technical spirit disclosed in the present specification is not limited by the accompanying drawings, and all changes and equivalents included in the spirit and scope of the present invention It should be understood to include water or substitutes. In the drawings, in consideration of the convenience of understanding, the size or thickness may be exaggeratedly large or small, but the protection scope of the present invention should not be construed as being limited thereto.

The terms used herein are used only to describe specific embodiments or examples, and are not intended to limit the present invention. And singular expressions include plural expressions unless the context clearly dictates otherwise. In the specification, terms such as includes, consists of, etc. are intended to designate that the features, numbers, steps, operations, components, parts, or combinations thereof described in the specification exist. That is, in the specification, terms such as include and consist of. It should be understood that this does not preclude the possibility of addition or existence of one or more other features or numbers, steps, operations, components, parts, or combinations thereof.

Terms including ordinal numbers such as first, second, etc. may be used to describe various elements, but the elements are not limited by the terms. The above terms are used only for the purpose of distinguishing one component from another.

When a component is referred to as being “connected” or “connected” to another component, it may be directly connected or connected to the other component, but it is understood that other components may exist in between. it should be On the other hand, when it is said that a certain element is "directly connected" or "directly connected" to another element, it should be understood that the other element does not exist in the middle.

When an element is referred to as “over” or “below” another element, it should be understood that other elements may exist in the middle as well as directly above the other element. .

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in a commonly used dictionary should be interpreted as having a meaning consistent with the meaning in the context of the related art, and should not be interpreted in an ideal or excessively formal meaning unless explicitly defined in the present application. does not

In this specification, the vertical direction means a vertical direction, that is, a direction in which gravity acts. Therefore, downward means the direction of gravity, and upward means the opposite direction of gravity.

<First embodiment>

Referring to FIG. 1 , the sand sorting and dewatering complex facility 10 of the first embodiment includes a first aggregate sorting unit 20 and a sand dewatering unit 50 . The first aggregate sorting unit 20 wetly filters out large aggregates that are not crushed to a predetermined size or less. In the first embodiment, the first aggregate sorting unit 20 filters out aggregates larger than the size of sand. That is, the first aggregate sorting unit 20 may be a sand sorting unit.

The sand dewatering unit 50 dehydrates the sand by separating the turbid water from the mixture of the sand and the turbid water selected by the first aggregate sorting unit 20 .

The first aggregate sorting unit 20 includes a first screen network 23 , a crushed stone water mixing unit 22 , a crushed stone conveying unit 21 , a first water supply unit 25 , and a return conveying unit 24 . .

The crushed stone conveying unit 21 may be, for example, a conveyor belt that lifts and conveys crushed stone crushed in the crushing facility 70 of FIG. 4 . The upper end of the conveyor belt is located above the crushed stone water mixing unit 22 . The crushed stone falling from the upper end of the conveyor belt of the crushed stone transfer unit 21 is supplied to the crushed stone water mixing unit 22 .

The crushed stone water mixing unit 22 may be in the form of an open housing with upper and lower ends of one side. And one end of the first screen network 23 may be connected to the lower end of the open side of the crushed stone water mixing unit 22 . One end of the first screen network 23 may face the lower end of the open portion of the one side of the crushed stone water mixing unit 22 . And the height of one end of the first screen network 23 may correspond to the height of the bottom surface of the crushed stone water mixing unit 22 .

One end of the first screen network 23 may face the crushed stone water mixing unit 22 , and the other end may face the return transfer unit 24 . The first screen network 23 may be installed at a normal slope in such a way that the height decreases from one end to the other end.

A first water supply unit 25 is installed in a predetermined section downward from an upper portion of the crushed stone water mixing unit 22 and one end of the first screen network 23 . The first water supply unit 25 supplies water to a predetermined section between the crushed stone water mixing unit 22 (aka shower box) and the first screen network 23 . The predetermined section may be from one end of the first screen network 23 to a point corresponding to about 1/2 of the length of the first screen network 23 . By limiting the water supply section of the first water supply unit 25, the water supplied from the first water supply unit 25 can be prevented from flowing out or overflowing more than the other end of the first screen network 23. have.

The first screen network 23 may have a mesh of a size through which sand passes and aggregates larger than sand are caught. The first screen network 23 may have a width of about 4 to 6 mm.

The first screen network 23 may vibrate while drawing a circular trajectory. The crushed stone supplied from the crushed stone transfer unit 21 to the first screen network 23 is mixed with a large amount of water supplied from the first water supply unit 25 to reduce the adhesive properties between aggregates. Accordingly, the sand smaller than the mesh of the first screen mesh 23 passes through the first screen mesh 23 together with water and falls, and the aggregate larger than the mesh of the first screen mesh 23 is the first screen mesh ( 23), it can move to the other end and gather in the return transfer unit 24 . The return transfer unit 24 may be a conveyor belt connected from the other end of the first screen network 23 to the crushing device 70 (refer to FIG. 4 ). The oversized aggregate filtered by the return transfer unit 24 is crushed after returning to the crushing facility.

The water pouring downward through the mesh of the first screen network 23 is mixed with the soil or fine powder mixed in the crushed stone and poured as turbid water.

The sand dewatering unit 50 is disposed below the first aggregate sorting unit 20 . The sand dewatering unit 50 includes a second screen network 54 , a chute water storage tank 51 , a sand pump 52 , a wet cyclone 53 , and a sand shipping unit 55 .

The second screen network 54 is installed vertically below the first screen network 23 at a position spaced downward from the first screen network 23 . Accordingly, as shown, sand and turbid water that have passed through the first screen network 23 fall directly onto the second screen network 54 without a separate water separation operation for separating water from the sand. In the embodiment, as shown, a structure in which sand and turbid water passing through the first screen network 23 directly fall on the second screen network 54 is exemplified. One end and the other end of the second screen network 54 may be disposed to correspond to each other in a vertical direction with one end and the other end of the first screen network 23 . In addition, the second screen network 54, like the first screen network 23, may be installed at a normal slope in such a way that the height decreases from one end to the other end. The inclination angle of the second screen network 54 may correspond to the inclination angle of the first screen network 23 . That is, the second screen network 54 may be arranged side by side with the first screen network 23 .

The second screen net 54 may be a sand dewatering net, that is, a dewatering screen net. As the second screen network 54 , for example, a urethane mesh or a stainless steel mesh having a diameter of about 0.5 mm may be used.

Accordingly, the second screen network 54 passes turbid water and some small sand of 0.5 mm or less through the opening, and does not pass sand of 0.5 mm or more and sand of 0.5 mm or less. The reason that some sand of 0.5 mm or less is collected without passing through the second screen net is because the sand itself, which is piled up with a considerable thickness on the second screen net, acts as a sieve.

A sand shipping part 55 is installed at the other end of the second screen mesh 54 , and a chute water tank 51 is installed at a lower part of the second screen mesh 54 . The chute water storage tank 51 is installed on the ground, and can well support the weight of the turbid water passing through the second screen network 54 .

The second screen network 54 vibrates in the same way as the first screen network 23 . Accordingly, the sand falling through the mesh of the first screen mesh 23 does not pass through the second screen mesh 54 and is filtered and moves to the other end on the second screen mesh 54 to move to the other end of the sand shipping unit 55 . gather at

The sand shipping unit 55 may be a conveyor belt for shipping dewatered sand.

The turbid water and a small amount of sand that have passed through the second screen network 54 are collected in the chute storage tank 51 . The chute water tank 51 has an inclined surface that gathers toward the center of the lower end. Therefore, a small amount of sand is collected in the lower part by its own weight.

The suction side of the sand pump 52 is connected to the center of the lower end of the chute water storage tank 51 through a pipe or the like. And the discharge side of the sand pump 52 is connected to the wet cyclone 53 through a pipe or the like. The sand pump 52 sucks in a small amount of sand and turbid water in the chute storage tank 51 , and supplies it to the wet cyclone 53 at a high pressure to generate a swirling water flow in the wet cyclone 53 .

As the sand pump 52, a conventional one may be used as it is. However, unlike the sand pump 92 (refer to FIG. 4 ) applied to the conventional structure, the sand handled by the sand pump 52 installed in the embodiment is sand particles that pass through the dewatering net, that is, the second screen net, and descend into the water tank. The size is less than 0.5mm and the amount is very small. That is, compared to the weight of individual sand particles having a size of 4 to 6 mm entering the storage tank 91 of the conventional sand unit 90 (refer to FIG. 4 ), the sand in the chute storage tank 51 of the first embodiment is the unit sand. In terms of particle size, the weight is only about 1/1000, and the amount is very small, about 1/10 to 1/100. Accordingly, the sand pump 52 of the embodiment does not need to handle a large amount of coarse sand. Therefore, the wear of the impeller or the lining constituting the sand pump 52 can be extremely reduced, and as a result, a long life can be ensured even when a product lined with rubber is used.

The wet cyclone 53 has an inlet connected to the sand pump 52, a first outlet 531 provided at one end, and a second outlet 532 provided at the other end. The first outlet 531 is a site where sand particles and a small amount of turbid water are mixed and discharged in the turbid water according to the cyclone principle, and the second outlet 532 is an overflow outlet and is a site where a large amount of turbid water is discharged.

The first outlet 531 of the cyclone 53 is disposed on one end of the second screen network 54 . Accordingly, the sand particles and a small amount of turbid water discharged through the first outlet 531 are again supplied to one end of the second screen network 54, and are dehydrated again on the second screen network 54 to obtain turbid water. It falls back to the chute water tank 51 and the sand is screened.

In order to improve the cleanliness of the sand, water may also be supplied to the second screen network 54 through the second water supply unit 56 . The water supply amount of the second water supply unit 56 may be smaller than the water supply amount of the first water supply unit 25 , and a level that does not burden the second screen network 54 (water is the amount of water supplied by the second screen network). It may be an amount sufficient to fall down without flowing out to the other end).

The second outlet 532 of the cyclone 53 is connected to a wastewater treatment facility. Therefore, the turbid water that overflows through the second outlet 532 of the cyclone 53 is supplied to a wastewater treatment facility, and becomes fresh water (a form in which fine powder mixed in the turbid water is removed) in the wastewater treatment facility, and then again The first water supply unit 25 and the second water supply unit 56 are reused.

The wet cyclone 53 of the embodiment may also be used as it is a conventional one. However, like the sand pump 52 of the embodiment, the wet cyclone 53 of the embodiment also has a very small wear action, so the lifespan is greatly increased. In addition, as the amount of sand discharged through the first outlet 531 is significantly reduced compared to the prior art (see FIG. 4 ), the diameter of the first outlet 531 of the wet cyclone is changed to the conventional first outlet 931 (see FIG. 4 ). ) can be significantly reduced. This greatly reduces the amount of turbid water discharged together with the sand from the first outlet 531 , thereby reducing the burden on the dewatering network and enabling efficient dewatering.

The first screen network 23 and the second screen network 54 are installed on the first deck 341 and the second deck 342, respectively, and the first deck 341 and the second deck 342. is integrally connected to each other by left and right side plates 348, and screens including screen nets 23 and 54 and a first deck 341, a second deck 342, and side plates 348. The assembly 34 is circularly vibrated by a vibrating device (not shown) installed on the side plate 348 . The screen assembly 34 is freely supported at a certain height and position by a support structure 30 including a pillar member 31 , a girder member 32 , and a buffer member 33 .

Since the vibrating device is installed on the side plate 348 and vibrates, the first screen network 23 and the second screen network 54 connected thereto can vibrate together by one vibrating device.

The chute water storage tank 51 may be installed on the ground in the space between the pillar members 31 .

<Second embodiment>

Hereinafter, a second embodiment will be described with reference to FIG. 2 . In the description of the second embodiment, differences from the first embodiment will be mainly described. Accordingly, for matters not described in the second embodiment below, reference may be made to other embodiments.

Referring to FIG. 2 , the sand sorting and dewatering complex facility 10 of the second embodiment includes a first aggregate sorting unit 20 , a second aggregate sorting unit 40 , and a sand dewatering unit 50 . The first aggregate sorting unit 20 wetly filters out large aggregates that are not crushed to a predetermined size or less. In the second embodiment, the first aggregate sorting unit 20 filters out aggregates larger than the first standard (eg, 13 mm) larger than the size of sand.

The second aggregate sorting unit 40 selects aggregate smaller than the first standard and larger than sand from sand and turbid water.

In the first embodiment, the first aggregate sorting unit is a sand sorting part, whereas in the second embodiment, the second aggregate sorting part is a sand sorting part.

The sand dewatering unit 50 dehydrates sand by separating turbid water from the mixture of sand and turbid water selected by the second aggregate sorting unit 40 .

The first aggregate sorting unit 20 includes a third screen network 26 , a crushed stone water mixing unit 22 , a crushed stone conveying unit 21 , a first water supply unit 25 , and a return conveying unit 24 . .

The third screen network 26 may have one end facing the crushed stone water mixing unit 22 and the other end facing the return transfer unit 24 . The third screen network 26 may be installed at a normal slope. A first water supply unit 25 is installed in the upper portion of the crushed stone water mixing unit 22 and in a predetermined section from one end to the other end of the third screen network 26 .

The third screen network 26 may have a mesh of a size in which aggregate and sand smaller than the first standard pass, and aggregate larger than the first standard is caught. For example, the third screen network 26 may have a width of about 13 mm.

The third screen network 26 may vibrate while drawing a circular trajectory. The crushed stone supplied from the crushed stone transfer unit 21 to the third screen network 26 is mixed with a large amount of water supplied from the first water supply unit 25, thereby reducing the adhesive properties between aggregates. Accordingly, aggregate and sand smaller than the first standard pass through the third screen network 26 together with water and fall, and the aggregate larger than the mesh of the third screen network 26 is placed on the third screen network 26 on the other side. It can be moved to the end and collected by the return transfer unit 24 . The oversized aggregate filtered by the return transfer unit 24 is crushed after returning to the crushing facility.

The water pouring downward through the mesh of the third screen network 26 is mixed with the soil or fines mixed in the crushed stone and poured as turbid water.

The second aggregate sorting unit 40 is disposed below the first aggregate sorting unit 20 .

The second aggregate sorting unit 40 includes a fourth screen network 43 and an aggregate shipping unit 44 .

The fourth screen network 43 is installed vertically below the third screen network 26 at a position spaced downward from the third screen network 26 . One end and the other end of the fourth screen network 43 may be disposed to correspond to each other in a vertical direction with one end and the other end of the third screen network 26 . The fourth screen network 43 may be installed with a normal inclination similarly to the third screen network 26 , and the inclination angle may also correspond to the third screen network 26 . An aggregate shipping part 44 is installed at the other end of the fourth screen network 43 . The aggregate delivery unit 44 may be a conveyor belt.

The fourth screen network 43 may have a width of about 4 to 6 mm. That is, the fourth screen network 43 may be a screen network corresponding to the first screen network 23 of the first embodiment. The fourth screen network 43 may vibrate in a circle. Aggregates smaller than the first standard, sand and turbid water descending through the third screen mesh 26 through the mesh fall onto the fourth screen mesh 43 . Since the aggregate and sand are in a state in which mutual viscosity is reduced by water, they are easily classified by the fourth screen network 43 . That is, sand falls through the mesh of the fourth screen mesh 43 together with the turbid water, and aggregates larger than sand and smaller than the first standard do not pass through the fourth screen mesh 43 and fall through the fourth screen mesh 43. ) flows to the other end along the inclined surface and is provided to the aggregate shipping unit 44 . Accordingly, the aggregate shipping unit 44 ships aggregate of a size smaller than the first standard and larger than sand.

In order to make the aggregate on the fourth screen network 43 more cleanly washed, water may also be supplied to the fourth screen network 43 and the aggregate and sand falling on the fourth screen network 43 . The water supply may be achieved by a third water supply unit 45 installed on the fourth screen network 43 .

The sand dewatering unit 50 is disposed below the second aggregate sorting unit 40 . The sand dewatering unit 50 includes a fifth screen network 57 , a chute water storage tank 51 , a sand pump 52 , a wet cyclone 53 , and a sand shipping unit 55 .

The fifth screen network 57 is installed vertically below the fourth screen network 43 at a position spaced downward from the fourth screen network 43 . Accordingly, as shown, the sand and turbid water that have passed through the fourth screen network 43 fall directly onto the fifth screen network 57 without a separate water separation operation for separating water from the sand. In the embodiment, as shown, a structure in which sand and turbid water passing through the fourth screen network 43 directly fall on the fifth screen network 57 is exemplified. One end and the other end of the fifth screen network 57 may be disposed to correspond to each other in a vertical direction with one end and the other end of the fourth screen network 43 . And the fifth screen network 57 may be installed with a normal slope. The inclination angle of the fifth screen network 57 may correspond to the inclination angle of the third screen network 26 and the fourth screen network 43 .

The fifth screen network 57 may be a sand dewatering net, that is, a dewatering screen net. That is, the fifth screen network 57 of the second embodiment may be a dewatering screen network similar to the second screen network 54 of the first embodiment. Accordingly, the fifth screen network 57 passes turbid water and some small sand of 0.5 mm or less through the opening, and does not pass sand of 0.5 mm or more and sand of 0.5 mm or less. The fifth screen network 57 vibrates in a circle like the third screen network 26 and the fourth screen network 43 .

A sand shipping part 55 is installed at the other end of the fifth screen network 57 , and a chute water tank 51 is installed at a lower portion of the fifth screen network 57 . The sand shipping unit 55 may be a conveyor belt for shipping dewatered sand.

The turbid water and a small amount of sand that have passed through the fifth screen network 57 are collected in the chute storage tank 51 . A small amount of sand and turbid water in the chute storage tank 51 are provided to the wet cyclone 53 by the sand pump 52 .

According to the second embodiment, as compared with the first embodiment, by further providing the third screen network 26, it is possible to select not only sand but also aggregates of the first standard.

The third screen network 26 , the fourth screen network 43 , and the fifth screen network 57 arranged vertically are the first deck 341 , the third deck 343 , and the second screen network 57 respectively arranged vertically. It is installed and supported on the deck 342 . The decks 341, 343, 342 are connected by a side plate 348 and integrated to form the screen assembly 34, and integrally vibrating on the support structure 30 by a circular vibrating device, not shown. It is the same as that of Example 1.

The second embodiment discloses a structure that can further select one type of aggregate having a size smaller than the first standard and larger than sand. However, similar to the implementation of the second embodiment in which one type of aggregate can be further selected by adding a third screen network 26 from the first embodiment, the additional screen network and the additional aggregate shipping unit are obtained from the second embodiment. By further adding an additional aggregate sorting unit including an additional water supply unit and an additional water supply unit, it is also possible to further select two types of aggregates than in the first embodiment.

Although not shown, the additional screen network is disposed vertically below the third screen network 26 , and the fourth screen network 43 and the fifth screen network 57 are disposed vertically below the additional screen network. They can be arranged in order. In this case, the width of the third screen network 26 may be, for example, 25 mm, and the width of the additional screen network may be 13 mm. Then, at the bottom of the additional screen network, a larger size aggregate (eg, 25 ~ 13 mm aggregate) will be shipped, and at the bottom of the fourth screen network (43), small size aggregate (eg, 13 ~ 5 mm aggregate) will be shipped. appendix will be located. As described above, it will be understood that the size and type of aggregate that can be produced according to the present invention is virtually unlimited.

<Third embodiment>

Referring to FIG. 3 , the sand sorting and dewatering complex facility 10 of the third embodiment is different from the first embodiment in that the first screen network 23 and the second screen network 54 are horizontally installed. And the vibration device 60 of the third embodiment is different in that it causes linear reciprocating vibration in the C direction, that is, in a direction inclined upward toward the return transfer unit 24 and the sand shipment unit 55 .

According to the third embodiment, the overall height of the sand sorting and dewatering complex facility 10 can be lowered, thereby further reducing the power required for the crushed stone transfer unit 21 , the water supply units 25 and 56 , the sand pump 52 , etc. can do.

In addition, in the case of the third embodiment, it is obvious that by increasing the type of screen net as in the second embodiment, it is possible to simultaneously produce aggregates having a size larger than that of sand in addition to sand.

As described above, the present invention has been described with reference to the illustrated drawings, but the present invention is not limited by the embodiments and drawings disclosed in the present specification. It is obvious that variations can be made. In addition, although the effects according to the configuration of the present invention are not explicitly described and described while describing the embodiments of the present invention, it is natural that the effects predictable by the configuration should also be recognized.

10: Sand sorting and dewatering complex facility
20: first aggregate sorting unit
21: crushed stone transfer unit (conveyor belt)
22: crushed stone water mixing unit
23: first screen network (wet)
24: return transfer unit (conveyor belt)
25: first water supply unit
26: third screen network (wet)
30: support structure
31: column member
32: girder member
33: buffer member
34: screen assembly
341: first deck
342: second deck
343: third deck
348: side plate
40: second aggregate sorting unit
43: fourth screen net (wet)
44: aggregate shipment unit (conveyor belt)
45: third water supply unit
50: sand dewatering unit
51: chute reservoir
52: sand pump
53: wet cyclone
531: Exit 1
532: Exit 2
54: second screen net (dehydration screen net)
55: sand delivery unit (conveyor belt)
56: second water supply unit
57: fifth screen net (dehydration screen net)
60: vibrator
70: crushing equipment
71: Hopper
72: feeder
73: crusher
80: sand sorting equipment (wet screen)
81: conveyor belt
82: shower
83: inclined screen
84: return conveyor belt
85: first hopper
86: pipe
90: dewatering equipment
91: water tank
92: sand pump
93: wet cyclone
931: Exit 1
932: Exit 2
94: dehydration screen
95: shipping conveyor belt

Claims (16)

A sand sorting and dewatering complex facility (10) provided with a first aggregate sorting unit (20) and a sand dewatering unit (50),
The first aggregate sorting unit 20 includes:
a first screen network 23 for filtering oversized aggregates larger than sand and passing the sand downward;
crushed stone transfer unit 21 for supplying crushed stone for sorting to one end of the first screen network 23; and
a first water supply unit 25 for supplying water to the crushed stone supplied from the crushed stone transfer unit 21;
The sand dewatering unit 50 includes:
a dewatering screen network 54 that receives the sand and turbid water that have passed through the first screen 23, filters the sand and passes the turbid water downward;
a chute water tank 51 disposed under the dewatering screen network 54 to temporarily store the turbid water;
a sand pump 52 for sucking and pressurizing the turbid water in the chute water storage tank 51;
It has a first outlet 531 and a second outlet 532 , the turbid water discharged from the sand pump 52 flows in, and the sand component is selected from the introduced turbid water and discharged to the first outlet 531 for dehydration. a wet cyclone 53 for supplying the screen network 54 and discharging the turbid water from the introduced turbid water to the second outlet 532; and
and a sand shipping unit 55 provided at the end of the dewatering screen network 54 to ship the sand selected by the dewatering screen network 54;
The first screen network 23 and the dewatering screen network 54 are mounted on a common screen network mounting frame 34 , and at least a portion of the dewatering screen network 54 is vertically aligned with the first screen network 23 . It is disposed below so that the sand and turbid water that have passed through the first screen network 23 fall directly onto the dewatering screen network 54 without going through a water separation process,
The sand component selected by the wet cyclone 53 and discharged to the first outlet 531 is supplied to the dewatering screen 54 that filters the sand falling from the first screen 23,
The sand pump 52 and the wet cyclone 53 handle the sand and turbid water that have fallen from the dewatering screen network 54, and the sand and a small amount of turbid water selected by the wet cyclone 53 are used in the first screen network. (23), along with the sand that has fallen through, is dewatered in the dewatering screen network (54), a sand sorting and dewatering complex facility.
A sand sorting and dewatering complex facility (10) provided with a first aggregate sorting unit (20), a second aggregate sorting unit (40) and a sand dewatering unit (50),
The first aggregate sorting unit 20 includes:
a third screen network 26 for filtering oversized aggregate larger than the first standard (the first standard is a standard larger than sand) and passing aggregates equal to or smaller than the first standard downward;
crushed stone transfer unit 21 for supplying crushed stone for sorting to one end of the third screen network 26; and
a first water supply unit 25 for supplying water to the crushed stone supplied from the crushed stone transfer unit 21;
The second aggregate sorting unit 40 includes:
a fourth screen network 43 that receives aggregates that have passed through the third screen network 26 and has fallen, and filters out aggregates larger than sand among them and allows sand to pass downward; and
and an aggregate shipping part 44 provided at the end of the fourth screen network 43 to ship the aggregate that did not pass through the fourth screen network 43;
The sand dewatering unit 50 includes:
a dewatering screen network 57 that receives the sand and turbid water passing through the fourth screen network 43, filters the sand and passes the turbid water downward;
a chute water tank 51 disposed under the dewatering screen network 57 to temporarily store the turbid water;
a sand pump 52 for sucking and pressurizing the turbid water in the chute water storage tank 51;
It has a first outlet 531 and a second outlet 532 , the turbid water discharged from the sand pump 52 flows in, and the sand component is selected from the introduced turbid water and discharged to the first outlet 531 for dehydration. a wet cyclone 53 for supplying the screen network 57 and discharging the turbid water from the introduced turbid water to the second outlet 532; and
and a sand shipping unit 55 provided at the end of the dewatering screen network 57 to ship the sand selected by the dewatering screen network 57;
The third screen network 26, the fourth screen network 43 and the dewatering screen network 57 are mounted on a common screen network mounting frame 34, and at least a part of the dewatering screen network 57 is 4 is disposed vertically below the screen network 43 so that the sand and turbid water passing through the fourth screen network 43 directly fall to the dewatering screen network 57 without going through a water separation process,
The sand component selected by the wet cyclone 53 and discharged to the first outlet 531 is supplied to the dewatering screen network 57 that filters the sand falling from the fourth screen network 43,
The sand pump 52 and the wet cyclone 53 handle the sand and turbid water that have fallen from the dewatering screen network 57, and the sand and a small amount of turbid water selected by the wet cyclone 53 are transferred to the fourth screen network ( 43), which is dewatered in the dewatering screen network (57) together with the sand that has fallen through, a sand sorting and dewatering complex facility.
3. The method according to claim 2,
It is disposed between the third screen network 26 and the fourth screen network 43 and is mounted on the screen network mounting frame 34, and receives aggregate that has passed through the third screen network 26 and has fallen, an additional screen network for filtering aggregates larger than the second standard (the second standard is smaller than the first standard and larger than sand) and passing the aggregate smaller than the second standard downward; and
Sand sorting and dewatering complex equipment, further comprising an additional aggregate sorting unit having; provided at the end of the additional screen network to ship the aggregate that has not passed through the additional screen network.
4. The method according to any one of claims 1 to 3,
The sand sorting and dewatering complex facility further comprising; a return transfer unit 24 for returning the filtered oversize aggregate.
4. The method according to any one of claims 1 to 3,
The screen network mounting frame 34 vibrates by a vibrating device 60,
The screen network mounting frame 34 is spaced apart from the ground by the pillar member 31 on the upper part,
Sand sorting, provided between the pillar member 31 and the screen mesh mounting frame 34, a buffer member 33 that relieves the vibration of the screen mesh mounting frame 34 from being transmitted to the pillar member 31 Dewatering Complex.
4. The method according to any one of claims 1 to 3,
The screen networks are installed with a normal slope,
The screen mesh mounting frame 34 is a circular vibration, sand sorting and dewatering complex facility.
4. The method according to any one of claims 1 to 3,
The screen networks are installed horizontally,
The screen mesh mounting frame 34 linearly reciprocates in a direction obliquely extending at an angle between a horizontal direction and a vertical direction, a sand sorting and dewatering complex facility.
The method according to claim 1,
The sand dewatering unit (50) further comprises a second water supply unit (56) for supplying water to the dewatering screen network (54).
4. The method according to claim 2 or 3,
The sand dewatering unit (50) further comprises a second water supply unit (56) for supplying water to the dewatering screen network (57).
4. The method according to claim 2 or 3,
The second aggregate sorting unit (40) further comprises a third water supply unit (45) for supplying water to the fourth screen network (43), the sand sorting and dewatering complex facility.
4. The method of claim 3,
The additional aggregate sorting unit further comprises an additional water supply unit for supplying water on the additional screen network, sand sorting and dewatering complex facility.
A method for screening and dewatering sand comprising:
A first screen network 23 is prepared for filtering aggregates larger than sand and allowing sand to pass downward, and at least a part of a dewatering screen network 54 for filtering sand and passing turbid water downward is the first screen network 23. Prepare a dewatering screen network 54 so as to be disposed vertically below of 54) to prepare a chute water tank 51 for storing the turbid water that has passed, a preparation step;
After the preparation step, crushed stone for sorting is supplied to the first screen network 23, and water is supplied, so that sand and turbid water pass through the first screen network 23, but without going through a water separation process, directly dewatering screen an oversize sorting step of allowing it to fall through the mesh 54 and filtering out aggregates larger than sand;
The dewatering screen network 54 receives sand and turbid water that have passed through the first screen network 23 and has not undergone a water separation process. step; and
The turbid water and some sand contained in the chute storage tank 51, falling through the dewatering screen network 54, are supplied to the wet cyclone 53 using the sand pump 52, and the wet cyclone 53 classified Sand and a small amount of turbid water are supplied to the dewatering screen 54 filtering the sand that has passed through the first screen network 23 and fallen, and a large amount of turbid water classified by the wet cyclone 53 is disposed of in a wastewater treatment facility. Including; sand reselection and turbid water circulation steps supplied to
The sand pump 52 and the wet cyclone 53 handle the sand and turbid water that have fallen from the dewatering screen network 54, and the sand and a small amount of turbid water selected by the wet cyclone 53 are transferred to the first screen network ( 23) and dewatering in the dewatering screen network (54) together with the sand that has fallen through, the sand sorting dewatering method.
A method for screening and dewatering sand comprising:
A third screen network 26 is prepared that filters aggregates larger than the first standard (the first standard is a standard larger than sand) and passes aggregates equal to or smaller than the first standard downward, and aggregates larger than sand are The fourth screen net 43 is prepared so that at least a part of the fourth screen net 43 for filtering and passing the sand downward is disposed vertically below the third screen net 26, and the sand is filtered and the turbid water is directed downward. The dewatering screen network 57 is prepared so that at least a part of the dewatering screen network 57 to pass through is disposed vertically below the fourth screen network 43, and the third screen network 26 and the fourth screen network ( 43) and a preparation step of mounting a dewatering screen network 57 on a common screen net mounting frame 34, and preparing a chute water tank 51 for storing the turbid water that has passed through the dewatering screen network 57;
After the preparation step, the crushed stone for sorting is supplied to the third screen network 26 and water is supplied so that aggregate and turbid water smaller than the first standard pass through the third screen network 26 and fall, Oversize screening step of filtering aggregates larger than the first standard;
The fourth screen network 43 receives aggregates and turbid water that have passed through the third screen network 26, and the sand and turbid water pass through the fourth screen network 43, but immediately dehydrate without going through a water separation process. an aggregate screening step of dropping to the screen network 57 and filtering aggregates larger than sand;
The dewatering screen network 57 receives sand and turbid water that has passed through the fourth screen network 43 and has not undergone a water separation process, and the turbid water passes through the dewatering screen network 57 and falls. step; and
The turbid water and some sand contained in the chute storage tank 51, falling through the dewatering screen network 57, are supplied to the wet cyclone 53 using the sand pump 52, and sorted through the wet cyclone 53. Sand and a small amount of turbid water are supplied to the dewatering screen network 57 that filters the sand that has passed through the fourth screen network 43, and a large amount of turbid water classified through the wet cyclone 53 is disposed of in a wastewater treatment facility. Including; sand reselection and turbid water circulation steps supplied to
The sand pump 52 and the wet cyclone 53 handle the sand and turbid water that have fallen from the dewatering screen network 57, and the sand and a small amount of turbid water selected by the wet cyclone 53 are transferred to the fourth screen network ( 43) and dewatered in the dewatering screen network (57) together with the sand that has fallen through, the sand sorting dewatering method.
14. The method of claim 13,
In the preparation step, at least a part of an additional screen network that filters aggregates larger than the second standard (the second standard is smaller than the first standard and larger than sand) and passes the aggregate smaller than the second standard downward. An additional screen network is further prepared such that it is disposed vertically below the third screen network 26 and at least a portion of the additional screen network is disposed vertically above the fourth screen network 43, and the additional screen network is formed in the It is mounted on a common screen net mounting frame 34,
In the aggregate sorting step, the additional screen net receives the aggregate that has passed through the third screen net 26, and the aggregate smaller than the second standard falls through the additional screen net, and is higher than the second standard. A sand sorting dewatering method that additionally filters large aggregates.
15. The method according to any one of claims 12 to 14,
Installing the screens horizontally and linearly reciprocating the screens in an inclined direction,
A sand sorting and dewatering method in which the screens are installed at a normal slope and the screens are vibrated in a circular motion.
15. The method according to any one of claims 12 to 14,
A sand sorting and dewatering method in which the common screen mesh mounting frame (34) is vibrated with a common vibrating device (60).

Images