KR102496451B1 - 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 sorting and dewatering sand or minerals in a wet method, wherein a sand dewatering net is provided at the bottom of a sorting net of a normal wet screen for sorting, and a water storage tank is provided at the bottom of the dewatering net Equipped with a sand pump in the water tank, a wet cyclone is connected to the sand pump outlet, the sand outlet of the wet cyclone is located on the top of the sand dewatering net, and the overflow outlet of the wet cyclone is connected to the wastewater treatment facility. A screen-type sand sorting and dewatering facility is provided.

Description

Wet sorting and dewatering method of sand of wet milling plant, and facility to which such method is applied

The present invention relates to an apparatus and method for preparing sand or refining minerals in a wet process, and more particularly, to an apparatus and method capable of simultaneously sorting and dewatering sand or minerals in a wet process.

Generally, sand is used in the manufacture of concrete. As such, the sand needed for the construction industry was mainly collected from the river bed. And as the sand that can be collected from rivers is depleted, the amount of sand collected from the sea and used after desalination has increased. However, fishermen's concerns have grown that these fish resources may be damaged and depleted if sand is collected from the seabed, as the seabed is rich in nutrients and is the basis for fish stocks where fish reefs are formed. Eventually, as the amount of sand collected from the sea increased, the fishermen's opposition intensified, and the government and local governments banned sand from the sea.

Accordingly, sand is currently procured by crushing wind rock or river rock to make sand. If the raw rock for sand production is clean and free of moisture, a dry process (sand sand removal) in which the rock is crushed, the sand particles are sorted, and then the soil or fine particles contained in the sand particles are removed by a dust collection facility using wind and a bag filter. manufacturing) equipment is available. However, since it is very difficult to obtain rocks without moisture in the natural state, the rocks collected in the natural state have no choice but to contain considerable moisture, and if dry milling equipment is used to make these rocks into sand, the quality will deteriorate. I had no choice but to.

Accordingly, a wet sand production facility (wet milling plant) that crushes wind rock or river rock to the size of sand and removes soil components by washing it with water has become a major source of sand.

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

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

The hopper 71 is a facility for accepting 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 sand raw material supplied by the feeder into a sand size. As a crusher, a cone crusher, an impact crusher, etc. can be used.

The wet screen 80 selects particles suitable for use as sand among raw materials supplied from a hopper or crusher through a conveyor belt 81 or the like in a wet manner. The wet screen 80 includes an inclined screen network 83 that vibrates in an inclined circle. The mesh of the inclined screen net 83 is of a size that allows sand to fall out, and since sand or sand raw materials placed on the inclined screen net 83 are washed with water from the shower unit 82, a large amount of muddy water mixed with sand is generated. . The oversized aggregate that did not pass through the inclined screen network (83) returns to the crushing facility (70) through the return conveyor belt (84), and the sand and muddy water that passed through the inclined screen network (83) are returned to the first hopper (85). are temporarily stored in

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

The sand unit 90 is smaller in size and has a larger processing capacity than conventionally used turbid water and sand separation devices such as screw classifiers, and has an excellent function of separating sand and soil. However, in order to absorb heavy sand together with water and supply it to the wet cyclone 93 at high pressure, the sand pump 92 inevitably consumes a lot of power (about 100 to 200 horsepower). In addition, the sand from 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, it is necessary to frequently replace pump parts and re-lining the inner surface of the wet cyclone, but these parts and work are expensive, and there is a problem that a lot of time is consumed for replacement and maintenance. In particular, since the operation of the entire plant must be stopped to replace parts of the sand pump, the damage is considerable.

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

In addition, the wet screen 80 for wet screening of sand 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 is also long in proportion to the height of the first screen net 83, so it occupies a large area. In this way, since the area occupied by the wet screen 80 is considerable, and the installation area occupied by the sand unit 90 described above is also considerable, 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 made to solve the above problems, and the purpose of the present invention is to provide a wet sorting and dewatering method of sand that can prevent a sand pump and a wet cyclone from handling a large amount of sand in a wet milling facility and a facility applying the same to be

An object of the present invention is to provide a method for wet screening and dehydration 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 using the same.

An object of the present invention is to provide a method for wet screening and dehydration of sand capable of constructing a wet milling plant capable of additionally sorting aggregates without increasing the area of the wet milling facility, and equipment applying the same.

In order to solve the above problems, the present invention, the first aggregate sorting unit 20 and the sand dewatering unit 50 are stacked vertically, and the sand and muddy water falling from the first aggregate sorting unit 20 are sand dewatering. The sand sorting and dewatering complex facility 10 is provided in which the sand is first dehydrated through the unit 50 and the sand is sorted, and the turbid water and a small amount of sand after the sorting are supplied to the wet cyclone. That is, in the sand sorting and dewatering complex facility 10, the first aggregate sorting unit 20 may be a sand sorting unit that sorts sand.

The first aggregate sorting unit 20 may include a first screen net 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 method.

The first screen net 23 filters oversized aggregate larger than sand and can pass sand downward. Most of the coarse sand can pass downward through the first screen net 23 .

The crushed stone transfer unit 21 may supply crushed stone for sorting to one end of the first screen net 23 . The crushed stone transfer unit 21 may be a conveyor belt that transports the crushed stones crushed by the crushing equipment 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 is provided at the other end of the first screen net 23 to return the oversized aggregate that did not pass through the first screen net 23 to the crushing equipment. The return transport unit 24 may be a conveyor belt.

The sand extractor 50 may include a second screen net 54, a chute water tank 51, a sand pump 52, a wet cyclone 53, and a sand delivery 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 net 54 can receive sand and muddy water that have passed through the first screen net 23 and have fallen. The second screen net 54 may be a dewatering screen net that filters sand and passes muddy water downward.

The second screen net 54 filters a large amount of sand, but a small amount of fine sand can pass through. That is, coarse sand is filtered through the dewatering screen net, and most of the fine sand is filtered out, but a small amount of fine sand can pass downward. In other words, muddy water and a part of the fine sand may pass downward through the dewatering screen network.

The chute water tank 51 is disposed under the second screen net 54 to temporarily store the muddy water and a small amount of sand.

The sand pump 52 may absorb and discharge muddy water and fine sand from the chute water tank 51 and pressurize them. The sand pump 52 is connected to the lower end of the chute storage tank 51 and can suck muddy water and a small amount of fine sand descending down the slope of the chute storage tank 51 .

The wet cyclone 53 may include a first outlet 531 and a second outlet 532 . Muddy water discharged from the sand pump 52 and a small amount of sand may flow into the wet cyclone 53 . The wet cyclone 53 may select sand components from the introduced turbid water, discharge them together with a small amount of turbid water through the first outlet 531, and supply them to the second screen net 54. The wet cyclone 53 may discharge a large amount of turbid water excluding the turbid water discharged through the first outlet 531 from the introduced turbid water through the second outlet 532 .

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

The sand shipping unit 55 is provided at the end of the second screen net 54 and can ship sand dehydrated by the second screen net 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 draining unit 50 are stacked vertically, and the first aggregate sorting unit 20 has a predetermined size. Aggregate and sand are sorted in the second aggregate sorting unit 40, sand and turbid water dropped from the second aggregate sorting unit 40 are dehydrated through the sand dewatering unit 50 first, and the sand is sorted out, and the 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 that sorts sand.

The first aggregate sorting unit 20 may include a third screen net 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 method.

The third screen net 26 has a first standard mesh larger than sand. Therefore, the third screen net 26 can filter oversize aggregates larger than the first size and pass aggregates equal to or smaller than the first size downward.

The crushed stone transfer unit 21 may supply crushed stone for sorting to one end of the third screen net 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 is provided at the other end of the third screen net 26 and can return oversized aggregate that did not pass through the third screen net 26 .

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

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

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

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

On the other hand, the second aggregate sorting unit 40 further includes an additional screen net and an additional aggregate shipping unit, so that aggregates of additional specifications can be further sorted.

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 net can receive aggregate and sand that have fallen through the third screen net 26 before the fourth screen net 43 . The additional screen net may have a mesh of a second standard smaller than the first standard and larger than sand. Accordingly, the additional screen net can filter aggregates larger than the second standard and pass aggregates smaller than the second standard downward.

The additional aggregate shipping unit is provided at an end of the additional screen net to ship aggregate that has not passed through the additional screen net.

The screen networks may be mounted on the screen network mounting frame 34. The screen net mounting frame 34 may include a plurality of decks spaced vertically, and side plates 348 integrally connecting the plurality of decks on the left and right sides. A plurality of the screen networks may be installed on each of the plurality of decks.

The screen net mounting frame 34 may have a 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 vibrator 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.

A buffer member 33 may be provided between the pillar member 31 and the screen net mounting frame 34 to mitigate transmission of the vibration of the screen to the pillar member 31 .

The screen nets may be installed with a regular gradient in which the height of the screen nets gradually decreases when viewed in the direction in which the aggregate or sand advances. Also, the screen net mounting frame 34 may perform circular vibration.

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

The sand extractor 50 may further include a second water supply unit 56 supplying water to the second screen net 54 .

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

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

In addition, the present invention provides a method for screening and dewatering sand.

In the sand sorting and dewatering method, a first screen net 23 for filtering aggregates larger than sand and passing sand downward is prepared, and at least a part of the second screen net 54 for filtering sand and passing muddy water downward is A preparation step of preparing a second screen net 54 to be disposed vertically below the first screen net 23 and preparing a chute water tank 51 for storing muddy water that has passed through the second screen net 54 includes Here, the first screen net 23 constitutes a sand sorting unit, and the second screen net 54 constitutes a sand dewatering unit.

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

In the sand sorting and dewatering method, the second screen net (54) receives the sand and muddy water that have fallen through the first screen net (23), and the muddy water passes through the second screen net (54) to fall The sand includes a filtering sand dewatering step.

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

In the sand sorting and dewatering method, the sand pump (52) removes muddy water from falling through the second screen net (54) and contained in the chute water tank (51) and a small amount of fine sand that has passed through the second screen net (54). is supplied to the wet cyclone 53, and the sand and a small amount of turbid water classified through the wet cyclone 53 are supplied to the second screen net 54, and a large amount of classified through the wet cyclone 53 The turbid water is supplied to the wastewater treatment facility; sand re-selection and turbid water circulation step; includes.

In addition, the present invention provides a method for screening sand, dewatering, and additionally screening aggregate.

In the method, a third screen net 26 is prepared that filters aggregates larger than the first standard (size larger than sand) and passes aggregates equal to or smaller than the first standard downward, filtering aggregates larger than sand, and filtering aggregates larger than sand. Prepare the fourth screen net 43 so that at least a portion of the fourth screen net 43 passing downward is disposed vertically below the third screen net 26, filtering sand and passing muddy water downward The fifth screen net 57 is prepared so that at least a part of the fifth screen net 57 is disposed vertically below the fourth screen net 43, and muddy water passing through the fifth screen net 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 net 43 constitutes a sand sorting unit, and the fifth screen net 57 constitutes a sand dewatering unit.

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

In this method, the fourth screen net 43 receives the aggregate that has fallen through the third screen net 26, so that the sand passes through the fourth screen net 43 and falls, and the aggregate larger than the sand It includes an aggregate selection step of filtering.

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

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

And in the method, in the aggregate sorting step, the additional screen net receives the aggregate that has fallen through the third screen net 26 so that the aggregate smaller than the second size passes through the additional screen net and falls, , Aggregate larger than the second standard can be additionally filtered.

According to the above method, the screens may be installed in a regular inclination direction, and the screens may 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 handle only muddy water and some sand that have passed through the second screen network, that is, the dewatering screen network, so that the sand pump and the wet cyclone do not handle a large amount of sand. Therefore, it is possible to significantly reduce the abrasion rate of the sand pump, the wet cyclone, and the piping connected to them due to friction with the sand. In addition, since the wear rate is significantly lowered, the maintenance cycle can be extended and the equipment operation rate can be further secured. In addition, power consumption of the sand pump can be significantly reduced.

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

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

1 to 3 show side views of first to third embodiments of sand sorting and dewatering combined equipment according to the present invention in a wet silk-making 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 applied and may be implemented in various different forms. Only this embodiment is provided to complete the disclosure of the present invention and to fully inform those skilled in the art of the scope of the invention. Therefore, the present invention is not limited to the embodiments disclosed below, but all changes and equivalents included in the technical spirit and scope of the present invention as well as substitution or addition of the configuration of one embodiment and the configuration of another embodiment each other to substitutes.

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

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

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

It is understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, but other elements may exist in the middle. It should be. On the other hand, when an element is referred to as “directly connected” or “directly connected” to another element, it should be understood that no other element exists in the middle.

When an element is referred to as being “on top” or “under” another element, it should be understood that other elements may exist in the middle as well as those 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 the present invention belongs. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related art, and unless explicitly defined in the present application, they should not be interpreted in an ideal or excessively formal meaning. don't

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

<First Embodiment>

Referring to FIG. 1 , the sand sorting and dewatering complex equipment 10 according to the first embodiment includes a first aggregate sorting unit 20 and a sand draining unit 50. The first aggregate sorting unit 20 filters large aggregates that are not crushed to a predetermined standard or less in a wet method. In the first embodiment, the first aggregate sorting unit 20 filters 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 separates muddy water from the mixture of sand and muddy water screened in the first aggregate sorting unit 20 to dehydrate the sand.

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

The crushed stone transfer unit 21 may be, for example, a conveyor belt that lifts and transfers the 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 a box in which an upper portion and a lower portion of one side are open. In addition, one end of the first screen net 23 may be connected to a lower end of one open side of the crushed stone water mixing unit 22 . One end of the first screen net 23 may face the lower end of the open portion of the one side of the crushed stone water mixing unit 22 . Also, the height of one end of the first screen net 23 may correspond to the height of the bottom surface of the crushed stone water mixing unit 22 .

The first screen network 23 may have one end facing the crushed stone water mixing unit 22 and the other end facing the return transfer unit 24 . The first screen network 23 may be installed with a regular inclination in a form in which the height decreases from one end to the other end.

A first water supply unit 25 is installed in a predetermined section downward from the top of the crushed stone water mixing unit 22 and one end of the first screen net 23. The first water supply unit 25 supplies water to the crushed stone water mixing unit 22 (aka shower box) and a predetermined section of the first screen net 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 outward or overflowing more than the other end of the first screen net 23. there is.

The first screen net 23 may have a mesh size that allows sand to pass through and catches aggregate larger than sand. The first screen network 23 may have an opening 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 net 23 is mixed with a large amount of water supplied from the first water supply unit 25, so that the adhesion between the aggregates is reduced. Accordingly, sand smaller than the mesh of the first screen net 23 passes through the first screen net 23 together with water and falls, and aggregate larger than the mesh of the first screen net 23 falls through the first screen net (23). 23), it can move to the other end and gather in the return conveying part 24. The return transfer part 24 may be a conveyor belt connected from the other end of the first screen net 23 to the crushing equipment 70 (see FIG. 4). The oversized aggregate filtered through the return transfer unit 24 is returned to the crushing equipment and then crushed.

The water pouring down through the net of the first screen net 23 is mixed with soil or fines mixed in the crushed stone and poured out as muddy water.

The sand extractor 50 is disposed below the first aggregate sorting unit 20 . The sand extractor 50 includes a second screen net 54, a chute water tank 51, a sand pump 52, a wet cyclone 53, and a sand delivery 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, the sand and muddy water that have passed through the first screen net 23 fall directly onto the second screen net 54 without a separate water separation operation to separate water from the sand. In the embodiment, as illustrated, a structure in which sand and muddy water passing through the first screen network 23 directly fall onto the second screen network 54 is exemplified. One end and the other end of the second screen network 54 may be arranged to correspond to one end and the other end of the first screen network 23 in a vertical direction. Also, like the first screen network 23, the second screen network 54 may be installed with a regular inclination such that its height decreases from one end to the other end. An inclination angle of the second screen network 54 may correspond to an 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 net 54, for example, a urethane net or stainless steel net having an opening of about 0.5 mm may be used.

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

A sand delivery unit 55 is installed at the other end of the second screen net 54, and a chute water tank 51 is installed at the bottom of the second screen net 54. The chute water tank 51 is installed on the ground and can well support the weight of muddy water passing through the second screen net 54.

The second screen network 54 vibrates in a circle similarly to the first screen network 23 . Therefore, the sand that has passed through the net of the first screen net 23 does not pass through the second screen net 54 but is filtered and moved to the other end on the second screen net 54 to be transported to the sand delivery unit 55. gather at

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

Muddy water and a small amount of sand passing through the second screen net 54 are collected in the chute water tank 51. The chute water tank 51 has an inclined surface converging toward the center of the lower end. Therefore, a small amount of sand is collected at the bottom due to its own weight.

The suction side of the sand pump 52 is connected to the center of the lower end of the chute water 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 muddy water in the chute water tank 51 and supplies it to the wet cyclone 53 at high pressure to generate a swirling water flow in the wet cyclone 53.

As the sand pump 52, a conventional one can be used as it is. However, unlike the sand pump 92 (see FIG. 4) applied to the conventional structure, the sand handled by the sand pump 52 installed in the embodiment passed through the dewatering net, that is, the second screen net, and the sand particles descended to the water tank. is less than 0.5 mm in size 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 reservoir 91 of the conventional sand unit 90 (see FIG. 4), the sand in the chute reservoir 51 of the first embodiment is 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 have to handle a large amount of coarse sand. Therefore, wear of the impeller or lining constituting the sand pump 52 can be extremely reduced, and as a result, a long lifespan can be guaranteed even when a rubber-lined product 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 portion where sand particles and a small amount of muddy water are mixed and discharged according to the cyclone principle, and the second outlet 532 is an overflow outlet and is a portion where a large amount of muddy water is discharged.

The first outlet 531 of the cyclone 53 is disposed on one end of the second screen net 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 net 54, and dehydrated again on the second screen net 54 to obtain turbid water. It falls back into the chute water tank 51 and the sand is sorted out.

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

The second outlet 532 of the cyclone 53 is connected to a waste water treatment facility. Therefore, the muddy water overflowed through the second outlet 532 of the cyclone 53 is supplied to the wastewater treatment facility, where it becomes fresh water (in the form of removing the fine particles mixed with the muddy water) in the wastewater treatment facility. It is reused in the first water supply unit 25, the second water supply unit 56, and the like.

The wet cyclone 53 of the embodiment can also be used as it is. However, like the sand pump 52 of the embodiment, the wet cyclone 53 of the embodiment also has an extremely small abrasion 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 aperture 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 sand from the first outlet 531, thereby reducing the burden on the dehydration network and enabling efficient dehydration.

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 the left and right side plates 348, and the screen including the screen networks 23 and 54, the first deck 341, the second deck 342, and the side plates 348 The assembly 34 is circularly vibrated by a vibrator (not shown) installed on the side plate 348. The screen assembly 34 is supported by a support structure 30 including a pillar member 31, a girder member 32, and a buffer member 33 at a constant height and position without vibration.

Since the vibration 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 a single vibration device.

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

<Second Embodiment>

A second embodiment will be described below with reference to FIG. 2 . In describing the second embodiment, differences from the first embodiment will be mainly described. Therefore, matters not described in the second embodiment below may refer to other embodiments.

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

The second aggregate sorting unit 40 sorts aggregates smaller than the first standard and larger than sand from sand and muddy water.

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

The sand dewatering unit 50 separates muddy water from the mixture of sand and muddy water screened in the second aggregate sorting unit 40 to dehydrate the sand.

The first aggregate sorting unit 20 includes a third screen net 26, a crushed stone water mixing unit 22, a crushed stone transfer unit 21, a first water supply unit 25, and a return transfer 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 with a regular inclination. A first water supply unit 25 is installed in a predetermined section from one end to the other end of the crushed stone water mixing unit 22 and the third screen net 26 .

The third screen net 26 may have a mesh size that allows aggregate and sand smaller than the first standard to pass through and catches aggregate larger than the first standard. For example, the third screen network 26 may have an opening 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 net 26 is mixed with a large amount of water supplied from the first water supply unit 25, thereby reducing the adhesion between the aggregates. Accordingly, aggregates and sand smaller than the first standard fall through the third screen net 26 together with water, and aggregates larger than the mesh of the third screen net 26 fall on the third screen net 26 on the other side. It can be moved to the end and gathered into the return conveying part (24). The oversized aggregate filtered through the return transfer unit 24 is returned to the crushing equipment and then crushed.

The water pouring down through the net of the third screen net 26 is mixed with the soil or fines mixed in the crushed stone and poured out as muddy 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 net 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 arranged to correspond to one end and the other end of the third screen network 26 in a vertical direction. Like the third screen network 26, the fourth screen network 43 may be installed with a regular inclination angle, and the inclination angle may also correspond to the third screen network 26. An aggregate delivery unit 44 is installed at the other end of the fourth screen net 43 . The aggregate delivery unit 44 may be a conveyor belt.

The fourth screen network 43 may have an opening 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. Aggregate, sand, and muddy water smaller than the first standard that descends through the mesh of the third screen net 26 fall onto the fourth screen net 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 net (43). That is, sand, together with muddy water, passes through the net of the fourth screen net 43 and falls, and aggregates larger than sand and smaller than the first standard do not pass through the fourth screen net 43 and fall. ) flows to the other end along the inclined surface and is provided to the aggregate delivery unit 44. Accordingly, the aggregate shipping unit 44 ships aggregate of a standard smaller than the first standard and larger than sand.

Water may also be supplied to the fourth screen net 43 and the aggregate and sand falling on the fourth screen net 43 to further clean the aggregate on the fourth screen net 43 . The water supply may be performed by a third water supply unit 45 installed on the fourth screen network 43 .

The sand extractor 50 is disposed below the second aggregate sorting unit 40 . The sand extractor 50 includes a fifth screen net 57, a chute water tank 51, a sand pump 52, a wet cyclone 53, and a sand delivery 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 muddy water that have passed through the fourth screen net 43 fall directly onto the fifth screen net 57 without a separate water separation operation to separate water from the sand. In the embodiment, as illustrated, a structure in which sand and muddy water passing through the fourth screen network 43 directly fall onto the fifth screen network 57 is exemplified. One end and the other end of the fifth screen network 57 may be arranged to correspond to one end and the other end of the fourth screen network 43 in a vertical direction. Also, the fifth screen network 57 may be installed with a regular inclination. The inclination angle of the fifth screen network 57 may correspond to the inclination angles of the third screen network 26 and the fourth screen network 43 .

The fifth screen net 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 the same as the second screen network 54 of the first embodiment. Therefore, the fifth screen net 57 passes muddy water and some small sand of 0.5 mm or less through the opening, but does not pass sand of 0.5 mm or more and some sand of 0.5 mm or less. The fifth screen network 57 vibrates in a circle similar to the third screen network 26 and the fourth screen network 43 .

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

Muddy water and a small amount of sand passing through the fifth screen net (57) are collected in the chute water tank (51). A small amount of sand and turbid water in the chute water tank 51 is supplied to the wet cyclone 53 by the sand pump 52.

According to the second embodiment, by further providing a third screen net 26 compared to the first embodiment, it is possible to sort 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 deck 341 arranged vertically. It is installed and supported on the deck 342. The decks 341, 343, and 342 are connected and integrated by side plates 348 to form the screen assembly 34, and circularly vibrate integrally on the support structure 30 by a circular vibrating device (not shown). Same as Example 1.

The second embodiment discloses a structure capable of further sorting 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 kind of aggregate can be further sorted by adding a third screen network 26 from the first embodiment, the additional screen network and additional aggregate shipping unit from the second embodiment It is also possible to further select two types of aggregates compared to the first embodiment by further adding an additional aggregate sorting unit including an additional water supply unit and an additional water supply unit.

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 vertically below the additional screen network. They can be placed in any order. In this case, the size of the third screen network 26 may be, for example, 25 mm, and the size of the additional screen network may be 13 mm. Then, at the lower end of the additional screen network, the shipping unit of larger standard aggregate (eg, 25 ~ 13 mm aggregate) will be located, and at the lower end of the fourth screen net (43), the shipment of small standard aggregate (eg, 13 ~ 5 mm aggregate) wealth will be located. As described above, it will be appreciated 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 differs from the first embodiment in that the first screen net 23 and the second screen net 54 are installed horizontally. And the vibration device 60 of the third embodiment is different in that it generates linear reciprocating vibration in the C direction, that is, in a direction inclined upward toward the return transfer unit 24 and the sand delivery 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, and the sand pump 52. can do.

In addition, in the case of the third embodiment, it is obvious that by arranging the types of screen nets as in the second embodiment, it is possible to simultaneously produce aggregates larger than sand in addition to sand.

As described above, the present invention has been described with reference to the drawings illustrated, but the present invention is not limited by the embodiments and drawings disclosed herein, and various modifications are made by those skilled in the art within the scope of the technical idea of the present invention. It is obvious that variations can be made. In addition, although the operation and effect according to the configuration of the present invention have not been explicitly described and described while describing the embodiments of the present invention above, it is natural that the effects predictable by the corresponding 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: 1st screen net (wet)
24: Return conveyance (conveyor belt)
25: first water supply unit
26: 3rd 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: 4th screen network (wet)
44: aggregate delivery unit (conveyor belt)
45: third water supply unit
50: sand dewatering unit
51: chute water tank
52: sand pump
53: wet cyclone
531: first exit
532: second exit
54: second screen net (dewatering screen net)
55: sand delivery unit (conveyor belt)
56: second water supply unit
57: 5th screen net (dewatering screen net)
60: vibrator
70: crushing equipment
71 Hopper
72: feeder
73: crusher
80: sand sorting equipment (wet screen)
81: conveyor belt
82: shower unit
83: inclined screen
84: return conveyor belt
85: first hopper
86 pipe
90: Dehydration facility
91: water tank
92: sand pump
93: wet cyclone
931: first exit
932: second exit
94: dewatering screen
95: shipping conveyor belt

Claims (16)

A sand sorting and dewatering complex facility 10 equipped with a first aggregate sorting unit 20 and a sand dewatering unit 50,
The first aggregate sorting unit 20 is:
A first screen net 23 that filters oversize aggregate larger than sand and passes sand through; and
A first water supply unit 25 for supplying water to the crushed stone supplied to the first screen net 23;
The sand extractor 50 is:
a dewatering screen network (54) that receives the sand and muddy water that have passed through the first screen network (23), filters the sand and passes the muddy water;
a chute water tank 51 for temporarily storing the muddy water that has passed through the dewatering screen network 54; and
Equipped with a first outlet 531 and a second outlet 532, turbid water flows into the chute water tank 51, sand components are separated from the inflow turbid water and discharged through the first outlet 531, and the dewatering screen A wet cyclone 53 that supplies the net 54 and discharges the turbid water from the introduced turbid water to the second outlet 532; includes,
Sand and muddy water that have passed through the first screen network 23 are supplied to the dewatering screen network 54 without going through a water separation process,
The sand component selected from the wet cyclone 53 and discharged to the first outlet 531 is supplied to the dewatering screen 54 that filters the sand that has passed through the first screen 23,
The wet cyclone 53 handles sand and muddy water that have passed through the dewatering screen network 54, and the sand and a small amount of muddy water selected from the wet cyclone 53 pass through the first screen network 23 A sand sorting and dewatering complex facility that is dehydrated in the dewatering screen network (54) together with the sand supplied by the method.
A sand sorting and dewatering complex facility 10 equipped 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 is:
A third screen net (26) for filtering oversized aggregates larger than the first standard (the first standard is larger than sand) and passing aggregates equal to or smaller than the first standard; and
A first water supply unit 25 for supplying water to the crushed stone supplied to the third screen network 26;
The second aggregate sorting unit 40 is:
A fourth screen net 43 that receives the aggregate that has passed through the third screen net 26, filters aggregate larger than sand among them, and passes the sand through,
The sand extractor 50 is:
a dewatering screen network (57) that receives sand and muddy water that have passed through the fourth screen network (43), filters the sand and passes the muddy water;
a chute water tank (51) for temporarily storing the muddy water that has passed through the dewatering screen network (57); and
Equipped with a first outlet 531 and a second outlet 532, turbid water flows into the chute water tank 51, sand components are separated from the inflow turbid water and discharged through the first outlet 531, and the dewatering screen A wet cyclone 53 that supplies the net 57 and discharges the turbid water from the introduced turbid water to the second outlet 532; includes,
The sand and muddy water that have passed through the fourth screen network 43 are supplied to the dewatering screen network 57 without going through a water separation process,
The sand components selected from the wet cyclone 53 and discharged to the first outlet 531 are supplied to the dewatering screen network 57 that filters the sand that has passed through the fourth screen network 43,
The wet cyclone 53 handles sand and muddy water that have passed through the dewatering screen net 57, and sand and a small amount of muddy water selected from the wet cyclone 53 pass through the fourth screen net 43 to A sand sorting and dewatering complex facility that is dehydrated in the dewatering screen network (57) together with the supplied sand.
The method of claim 2,
It is disposed between the third screen network 26 and the fourth screen network 43, receives the aggregate passed through the third screen network 26, and has a second standard (the second standard is the first standard). It further includes an additional aggregate sorting unit having an additional screen net that filters aggregates larger than the standard and passes aggregates smaller than the second standard,
The fourth screen net (43) is supplied with aggregate that has passed through the third screen net (26) and passed through the additional screen net.
The method according to any one of claims 1 to 3,
The screen nets are mounted on a common screen net mounting frame 34, sand sorting and dewatering complex equipment.
The method of claim 4,
The screen net mounting frame 34 is vibrated by the vibrator 60,
The screen net mounting frame 34 is spaced apart from the ground at an upper portion by a pillar member 31,
Between the pillar member 31 and the screen net mounting frame 34, a buffer member 33 is provided to relieve vibration of the screen net mounting frame 34 from being transmitted to the pillar member 31, sand sorting Dewatering complex facility.
The method of claim 4,
The screen networks are installed with a regular inclination,
The screen net mounting frame 34 vibrates in a circle, sand sorting and dewatering complex equipment.
The method of claim 4,
The screen networks are installed horizontally,
The screen net mounting frame 34 vibrates linearly and reciprocally in a direction extending obliquely at an angle between the horizontal direction and the vertical direction.
The method according to any one of claims 1 to 3,
A sand pump 52 for sucking in the turbid water in the chute water tank 51 and discharging it to the wet cyclone 53 under pressure; further comprising,
The sand pump (52) handles the sand and muddy water that have passed through the dewatering screen network.
As a method of screening and dewatering sand,
A first screen net 23 that filters aggregates larger than sand and passes sand through; a dehydration screen 54 for filtering sand and passing muddy water; a chute water tank 51 for storing muddy water that has passed through the dewatering screen network 54; and a wet cyclone 53 to which turbid water from the chute water tank 51 is supplied; preparing a preparation step;
After the preparation step, crushed stone for sorting is supplied to the first screen net (23) and water is supplied, so that sand and muddy water pass through the first screen net (23) but without going through a water separation process. An oversize screening step of supplying to (54) and filtering aggregates larger than sand;
A sand dewatering step in which sand and muddy water that have passed through the first screen network 23 and have not been subjected to water separation are supplied to the dewatering screen network 54 so that the muddy water passes through the dehydration screen network 54 and the sand is filtered. ; and
Passing through the dehydration screen network 54, turbid water and some sand contained in the chute water tank 51 are supplied to the wet cyclone 53, and the sand and a small amount of turbid water classified by the wet cyclone 53 are supplied to the first Sand supplied through the screen network 23 is supplied to the dewatering screen network 54 that filters the sand, and a large amount of turbid water classified by the wet cyclone 53 is supplied to wastewater treatment facilities Sand re-sorting and turbid water circulation step; including,
The wet cyclone 53 handles sand and muddy water that have passed through the dewatering screen network 54, and sand and a small amount of muddy water selected from the wet cyclone 53 pass through the first screen network 23 and are supplied Sand sorting and dewatering method of dewatering in the dewatering screen net (54) together with the dewatered sand.
As a method of screening and dewatering sand,
A third screen net 26 that filters aggregates larger than the first standard (the first standard is larger than sand) and passes aggregates equal to or smaller than the first standard; a fourth screen net (43) for filtering aggregate larger than sand and passing sand; a dehydration screen 57 for filtering sand and passing muddy water; a chute water tank (51) for storing muddy water that has passed through the dewatering screen network (57); and a wet cyclone 53 to which turbid water from the chute water tank 51 is supplied; preparing a preparation step;
After the preparation step, crushed stone for sorting is supplied to the third screen net 26 and water is supplied so that aggregates smaller than the first standard and muddy water pass through the third screen net 26, and the first An oversize screening step of filtering aggregates larger than the standard;
The fourth screen net 43 receives the aggregate and muddy water that have passed through the third screen net 26, and the sand and muddy water pass through the fourth screen net 43 without going through a water separation process. Aggregate sorting step of supplying to (57) and filtering out aggregates larger than sand;
A sand dehydration step in which sand and muddy water that have passed through the fourth screen network 43 and have not undergone a water separation process are supplied to the dewatering screen network 57 so that the muddy water passes through the dehydration screen network 57 and the sand is filtered. ; and
Passing through the dehydration screen network 57, turbid water and some sand contained in the chute water tank 51 are supplied to the wet cyclone 53, and the sand and a small amount of turbid water classified through the wet cyclone 53 are supplied to the fourth sand passing through the screen 43 is supplied to the dewatering screen 57, and a large amount of turbid water classified through the wet cyclone 53 is supplied to a wastewater treatment facility Sand re-sorting and turbid water circulation step; including,
The wet cyclone 53 handles sand and muddy water that have passed through the dewatering screen network 57, and sand and a small amount of muddy water selected from the wet cyclone 53 pass through the fourth screen network 43 and are supplied A sand sorting and dewatering method in which the dewatering sand is dehydrated in the dewatering screen net (57).
The method of claim 10,
In the preparation step, an additional screen net is further prepared to filter aggregates larger than the second standard (the second standard is smaller than the first standard and larger than sand) and pass aggregate smaller than the second standard,
In the aggregate sorting step, the additional screen net passes through the third screen net 26 to receive the fallen aggregate, and the aggregate smaller than the second size passes through the additional screen net to pass through the fourth screen net 43 ), and additionally filtering aggregates larger than the second standard, sand sorting and dewatering method.
According to any one of claims 9 to 11,
In the preparation step, the sand sorting and dewatering method of mounting the screen nets on a common screen net mounting frame (34).
The method of claim 12,
Sand sorting and dewatering method of horizontally installing the screens and linearly reciprocating the screens in an inclined direction.
The method of claim 12,
A sand sorting and dewatering method in which the screens are installed at a regular inclination and the screens are vibrated in a circular manner.
The method of claim 12,
A sand sorting and dewatering method in which the common screen net mounting frame (34) is vibrated by a common vibrating device (60).
According to any one of claims 9 to 11,
In the preparation step, a sand pump 52 for sucking in the turbid water in the chute water tank 51 and discharging it to the wet cyclone 53 under pressure is further prepared,
In the sand re-sorting and turbid water circulation step, by supplying turbid water and some sand contained in the chute water tank 51 to the wet cyclone 53 using the sand pump 52, the sand pump 52 Sand sorting and dewatering method for handling sand and muddy water that have passed through the dewatering screen network.

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