JP2501769B2 - Jig sorting method for crushed material and apparatus therefor - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a jig sorting method for crushed materials and a device therefor, and more particularly to a crushed material obtained by crushing minerals or waste such as automobiles and home appliances. TECHNICAL FIELD The present invention relates to a jig sorting method for crushed materials that performs vertical gravity-based separation according to specific gravity and separation by horizontal overflow of light specific gravity, and an apparatus therefor.

[0002]

BACKGROUND OF THE INVENTION Used waste such as automobiles and home appliances, minerals and the like are generally crushed by a shredder, and iron is recovered by a magnetic separation method. Other than iron, it is mainly a mixture of rubber, wood chips, plastic, glass, aluminum, copper, lead, stainless steel, etc., and the metal content is recovered from this mixture by manual selection, linear motor separator, permanent magnet. It is performed by a rotary separator (eddy current sorter) or the like. There is a jig sorter such as a sorter of various crushed materials (see Japanese Patent Publication No. 29462/1993) developed by the inventors of the present application in order to improve the collection efficiency of these sorts of sorts or devices.

In this jig sorter, as shown in FIG. 6, various crushed materials are continuously placed on a moving netted conveyor 3 immersed in a water tank 1 at a predetermined depth, and then crushed into water. Repeated vertical pulsation through the U-shaped water tank 2 by the pulsation generator 5, light specific gravity such as rubber and plastic in the upper layer, intermediate specific gravity such as glass and ceramics in the middle layer, and aluminum, copper, stainless steel in the lower layer, The water jet nozzle 4 is stratified up and down into heavy specific gravity substances such as zinc.
A horizontal water flow is applied in a direction perpendicular to the direction of travel of the crushed material to cause rubber, plastic, etc. to overflow from the overflow weir 9,
Similarly, the intermediate specific gravity material was overflowed, and the specific gravity material was carried out by the netted conveyor 3, whereby the specific gravity was separated for each layer.

[0004]

In the above-mentioned jig sorter, as shown in FIGS. 7 and 8, the flow direction is sorted only by the horizontal crossflow of the water serving as the sorting medium. It affects the movement of the object and is in parallel with the moving direction. In this case, the crushed material is the water tank 1.
7 and 8, the layers are vertically separated in the upper and lower layer separation zones of the first chamber and the second chamber where the specific gravity separation is performed, and the flow direction of water and light specific gravity in the third chamber is the traveling direction. The direction is changed so that it crosses and overflows. Thus, the overflow zones of the third and fourth chambers are used for such flow redirection and overflow, and that light specific gravity is carried over the entire length in the carrying direction. Therefore, it is necessary to transport the lighter specific gravity of the upper layer and the heavy specific gravity of the lower layer including the suspended dust stratified by the vertical pulsation of water over the entire length from the supply part to the discharge part, and the transportation distance is Since it is longer, the equipment is larger.

Further, in order to overflow water and light specific gravity, the position of the overflow weir must be provided in a direction perpendicular to the traveling direction of the crushed material and the water. Overflowing while diverting the flow is a factor that impairs the sorting function.

The present invention has been made to solve these problems, and the light specific gravity of the crushed material separated in the jig water tank is subjected to countercurrent flow opposite to the traveling direction of the heavy specific gravity. It is an object of the present invention to provide a jig sorting method for crushed material and an apparatus for the same, which discharges by a water stream to enhance its processing capacity and sorting performance.

[0007]

In order to achieve the above-mentioned object, the jig selection method of the crushed material of the present invention is a crushed material obtained by crushing minerals or wastes such as automobiles and household electric appliances.
By moving by a conveyor belt with a net moving in the jig water tank, it can be divided into metals with a high specific gravity and non-metals with a low specific gravity, and the crushed products can be washed with water. In the method
The crushed material supplied on the mesh conveyor belt is used for jig water.
Moving the water in the tank, causing pulsation in the jig water where the crushed material moves , and by this pulsation the specific gravity is vertically separated from the light specific gravity material to the heavy specific gravity material, and the jig water has the mesh conveyor belt given <br/> give a water stream as countercurrent in the opposite direction to the traveling direction, a portion of the light density of the crushed material which is gravity separation in the vertical direction by a water stream is moved in the water flow direction discharge from the water bath jig <br /> to leave, and a portion of the heavy specific gravity of gravity separated crushed material was transported to the traveling direction of the conveyor belts with net discharged from the water tank, characterized in that it comprises a step.

Further, in this jig selection method for crushed material , the crushed material is supplied to the middle portion of the jig water tank, and the light specific gravity material is provided at the end of the water tank opposite to the carrying direction of the heavy specific gravity material in the water tank. Is discharged by overflow, and the heavy specific gravity mixed with the light specific gravity that is not overflow discharged is guided onto a conveyor belt with a net, and is repeatedly selected by specific gravity separation.

In this jig selection method for crushed materials, overflow discharge is adjusted according to the type of crushed material according to the height of the weir for that purpose, the speed of the mesh conveyor is adjusted, and the amount of jig water supplied is adjusted. And the water supply position is adjusted, and the number of pulsations of the jig water and the stroke of the pulsations are adjusted.

Further, in this jig selection method for crushed materials, the sand and fine particles that have passed through the mesh of the meshed conveyor belt are carried out from the bottom of the jig water tank during operation.

Further, the jig sorting apparatus of the crushed material of the present invention is
Jig water tank, provided to move in the water of the jig water tank
It has a meshed conveyor belt, and the crushed material obtained by crushing minerals or waste such as automobiles and home appliances is used for jigs.
Moved by the above-mentioned mesh conveyor belt in the water of the aquarium
Was, together with divided into a heavy metals and specific gravity lighter non-metallic such specific gravity by the movement, in the jig sorting apparatus of crushed material capable of washing a crushed, outside the aquarium jig
It is provided on the upper side of the side and by the jig water tank and the U-shaped water tank.
A pulsation generator that is connected to each other to generate pulsation in jig water
Has a specific gravity which separates the light specific gravity thereof, or a heavy specific gravity thereof in the vertical direction by <br/> pulsation of jigs water which is caused by the pulsation generating device the broken <br/> grind is conveyed by the conveyor belts with net Separation device, for jig provided on top of jig water tank
Push the water in the direction opposite to the direction of movement of the meshed conveyor belt.
It has a water injection nozzle that injects water to produce water.
Water generator to provide a flow of jigs water as countercurrent against the direction of travel of mesh with the conveyor belt by the water, the water
Receives the water flow generated by the forced water from the flow generator
Has an overflow weir provided at the end of the water tank for
Provided a light specific gravity of crushed that is gravity separation in the vertical direction by Luo gravity separator water discharge device for discharging the water flow, and the water tank end of the traveling direction of the web with the conveyor belt
And a heavy specific gravity discharge device for discharging the heavy specific gravity conveyed by the meshed conveyor belt from the water tank.

[0012]

According to the jig selecting method of the crushed material, since the water flow of the jig water is given as the countercurrent to the traveling direction of the meshed conveyor belt, the pulsation generated in the jig water causes the jig water to move in the vertical direction. Non-metallic rubber and plastics with a specific gravity that are separated by specific gravity and are lighter than specific gravity of 1.9 are separated into the upper layers by the pulsation of water, while riding on the water flow in the opposite direction. Is discharged to the overflow weir and discharged from the overflow weir. On the other hand, the heavy specific gravity of metals which is heavier than 2.67 is separated into a lower layer at the overflow weir and left on the meshed conveyor belt. The transported crushed material is moved to the device for discharging the specific gravity material outside the water tank. And, in the meantime, the specific gravity, which is relatively heavy, is 1.9 ~
Rubber of about 2.0, etc. is mixed with light specific gravity and moved to the water flow discharge device by the water flow, and it sinks on the conveyor belt with a net at the overflow weir and is given the opportunity of multiple selection, Highly accurate sorting is carried out because the light specific gravity portion which is carried to the overflow weir in the water stream discharging device is separated by repeated sorting. In this way, the light specific gravity reaches the overflow weir of the water flow discharging device straight without changing the direction by the water flow, and reaches the discharging device without any difficulty, so that the light specific gravity can be smoothly overflowed and discharged.

In addition, in this jig selection method for crushed material, a crushed material supply unit is provided in the middle of the jig water tank, and a light specific gravity is provided at one end of the water tank on the side opposite to the direction in which the heavy specific gravity is conveyed in the water tank. An overflow discharge weir of the water flow discharge device was installed to guide the heavy specific gravity mixed in the light specific gravity onto the conveyor belt with a net so that it could be repeatedly selected. What had been separated can achieve the same function sufficiently in a few chambers,
The length of the water tank is greatly shortened, and the increase in equipment can be avoided.

Further, the intermediate specific gravity close to the specific gravity of each separated specific gravity is not discharged from the overflow weir even if it is moved to the overflow weir in the water flow discharge device by mixing with the light specific gravity. Since it is again picked up on the meshed conveyor belt and given the opportunity of the separation of the specific gravity, the sorting is repeated, so that the sorting can be carried out to such an extent that it can be taken out at the end of the work, and a good sorting result can be obtained.

Further, in this jig selection method for crushed material, the height of the overflow discharge weir, the speed of the conveyor with a net, the amount of jig water supplied and the position of water supply, and the pulsation number of jig water and Since the pulsation stroke can be adjusted according to the type of crushed material, it is possible to further change the sorting conditions according to the type, characteristics, etc. of the crushed material, thereby improving the sorting performance. it can.

Further, in this jig selection method for crushed materials, the earth and sand and fine particles that have passed through the mesh of the meshed conveyor belt are carried out from the bottom of the jig water tank during operation by the underwater carrier provided there. Therefore, the non-sortable ones contained in the crushed material sorted as described above can be collected from the water tank, the cleaning in the water tank can be reduced, and the operation efficiency can be improved. .

Further, since the apparatus for carrying out the jig selection method for this crushed material is equipped with the apparatus for carrying out the above-mentioned steps, the length of the apparatus as a whole can be greatly shortened, and Not only can reduction be achieved,
Equipment with dramatically improved performance and efficiency can be obtained.

[0018]

[Example] How to select a jig for crushed material according to an embodiment of the present invention
The method will be described with reference to FIGS. 3 to which show an apparatus therefor . In the figure, 1 is a jig water tank having an inclined bottom portion, 2 is a separate body provided in the jig water tank 1, the upper portion is divided into three separation chambers 21, 22 and 23, and the bottom portion is along the jig water tank peripheral wall. And a part of the pulley 3 outside the tank 1.
Conveyor belt with a net guided by 1, 32, and 33, 4 is a water jet nozzle forming a water flow generator for generating a water flow in the water in the jig water tank 1, and 5 is a U-shaped water tank 1.
A pulsation generator for generating pulsation in the inside 6 is a pulsation generated by the pulsation generator 5 above the inside of the jig water tank 1 of the U-shaped water tank 2. A specific gravity separation device for providing a specific gravity separation zone for specific gravity separation , 7 is an overflow weir that forms a water flow generation device provided at the end of the jig water tank 1 in the water flow direction, and 8 is a conveyor belt 3 with a net. A heavy specific gravity discharge device provided at the other end of the water tank 1 on the opposite side to the overflow weir 7 for discharging the transported heavy specific gravity material from the jig water tank 1, and 9 is the jig water tank 1. In the bucket elevator provided to take out sludge that has not fallen from the bottom end of the slanted bottom part without being separated by the specific gravity separation device 6 or sludge that has adhered to the meshed conveyor belt 3 and has dropped when passing through the bottom part. is there.

As shown in the cross-sectional view of FIG. 2, the U-shaped water tank 2 has three separation chambers 2 in a portion constituting the specific gravity separation device 6.
It is divided into 1, 22, and 23 and is arranged in a U-shaped cross section so as to be located on the outer side through the side wall 11 on one side, and the pulsation generator 5 is provided on the upper outer side of the water tank 2. Further, in the vicinity of the water surface of the jig water tank 1 of the U-shaped water tank 2 divided into the respective separation chambers 21, 22, 23, the respective separation chambers 21, 22, 2,
3, a water jet nozzle 4 forming a water flow generator is provided on the upper side of the meshed conveyor belt 3 in the traveling direction, and the meshed conveyor belt 3 is located in the right direction in FIG.
A water flow is generated as a countercurrent to the traveling direction of the. The pressed water jetted from the water jet nozzle 4 is a crushed material state,
That is, it can be adjusted according to its size, properties, etc., and can be ejected as intended as a water stream for discharge. Then, various crushed materials can be dealt with by changing the installation location or the amount of water sprayed.

The pulsation generator 5 for providing the specific gravity separation device 6 is a bellows from the vicinity of the water surface provided in the upper part of the U-shaped water tank 2 outside the water tank 1 corresponding to the respective separation chambers 21, 22, 23. Plunger 51 through 51 and rod 52
Has an eccentric sheave 53 connected to move the eccentric sheave 5 up and down.
A motor 5 for driving its rotating shaft 55 in order to rotate 3.
It is equipped with 4. Further, the motor 54 can adjust its rotation speed by an inverter. The eccentric sheave 53 expands and contracts the bellows 51 to give upward and downward pulsations to the water in the water tank 1. Each of the eccentric sheaves 53 is attached to the rotary shaft 55 by changing the eccentric position and causes pulsations having different phases. The pulsation is a wave height of 50 to 70 mm, 60
It has a pulsation number of up to 110 rpm, and is set by determining the optimum value according to the size, specific gravity, properties of contaminants, etc. of the crushed material supplied.

A vibration feeder 61 for supplying the crushed material obtained by crushing minerals sent by a belt conveyor 62 or wastes such as automobiles and household electric appliances is provided above the specific gravity separator 6. The jig water tank 1 is located near the center of the jig water tank 1 and above the first separation chamber 21 of the specific gravity separator 6.

Then, of the light specific gravity and the heavy specific gravity which are vertically separated in the specific gravity separating device 6, the light specific gravity lighter than the upper specific gravity of 1.9 is moved by the water flow and reaches one end of the water tank 1. Overflow weir 7 of the water flow discharge device provided in the section
Is provided so as to be in contact with the moving conveyor belt 3 at the lower end and inclined so that the upper end is located near the water surface at the end of the water tank 1.
In order to take out the light specific gravity material that has flowed out of this overflow weir 7,
As shown in FIG. 5, the discharge gutter 71 and the specific gravity of 1.9 to 2.
A draining screen 73 for receiving approximately 0 rubber or plastic is provided. In addition, the overflow weir 7
Since the height of protrusion from the water surface can be adjusted, efficient discharge is possible by adjusting the size and properties of the crushed material that has been sent.

At the other end of the jig water tank 1, a part of the netted conveyor belt 3 is moved out of the water tank 1 by a pulley 33 provided outside the water tank 1.
A heavy specific gravity discharge device 8 is provided to dehydrate the slanted portion of the meshed conveyor belt 3 and to carry the crushed aluminum, lead, stainless steel, zinc, etc., which is supplied with a heavy specific gravity heavier than 2.6. It can be selected from the objects and taken out. The net-equipped conveyor belt 3 at that time is determined by the layer thickness of the crushed material to be fed, but its driving motor is set so that the sorting time is approximately 1 to 2 minutes and the traveling speed is 1 to 3 m / min. It is adjusted by controlling the rotation speed of the inverter.

The jig sorting method of the present invention can be carried out as follows in the jig sorting apparatus having the above structure. Minerals crushed by shredder etc. or crushed industrial waste such as automobiles, home appliances etc.
As shown in FIGS. 1 and 2, the first separation chamber 2 in the specific gravity separation device 6 in an appropriate amount by a belt conveyor 62 above the water surface of the jig water tank 1 via a vibration feeder 61.
1 is fed to almost the center. The crushed material supplied onto the meshed conveyor belt 3 passing through the specific gravity separator 6 is separated into the separation chambers 21, 22, 23 by the pulsation generator 5.
The pulsation generated in
Specific gravity is separated into light specific gravity such as plastics and heavy specific gravity of metals such as aluminum, lead, stainless steel and zinc.
The thus separated heavy specific gravity substances are placed on the meshed conveyor belt 3 and sequentially conveyed to the next separation chamber.

Among the specific gravities thus separated, the light specific gravity of the upper layer is in the traveling direction of the netted conveyor belt 3 in the jig water tank 1 by the pushing water jetted from the water jet nozzle 4 of the water flow generator. Is given as a countercurrent in the opposite direction and is moved towards the overflow weir 7 of the water discharge device by this water flow. As shown in FIG. 2, since the light specific gravity represented by small particles is in the upper layer, the light specific gravity is overlaid on the overflow weir 7 by the water flow and moved through the trough 72. Then, dehydration is performed on the draining screen 73, and rubber, plastic, etc. are taken out. The light specific gravity mixed in the heavy specific gravity is conveyed to the next separation chamber 22 by the meshed conveyor belt 3, where it is further subjected to specific gravity separation due to pulsation and separated into upper layers by stratification separation, and the water injection nozzle 4 It is smoothly moved toward the overflow weir 7 by the water flow due to the squeezed water from the above, and the water flows over the overflow weir 7 and is discharged by the overflow. In the discharge of the light specific gravity by this specific gravity separation, the opportunity of separating and selecting the intermediate specific gravity is repeatedly given, and the accuracy of separating the light specific gravity can be improved.

In the overflow weir 7 from the specific gravity separation device 6, the heavy specific gravity mixed in the light specific gravity is separated into the next separation chamber 2
2, the specific gravity is again separated on the netted conveyor belt 3 by pulsation, and the light specific gravity of the upper layer is moved to the overflow weir 7 by the water jet from the water injection nozzle 4. And
In the overflow weir 7, the intermediate specific gravity is mixed into the heavy specific gravity without overflowing, and is sent to the separation chamber 21 in the specific gravity separation device 6 by the meshed conveyor belt 3 to be repeatedly subjected to specific gravity separation. Become. Therefore, the separation chambers of the specific gravity separator 6 are three chambers 21, 22 and 23 in FIG. 3 and two chambers 21 and 22 in FIGS. 1 and 2.
As shown below, the occupied length is shorter than that of the conventional one, and the length of the jig water tank 1 can be shortened, and the equipment can be downsized.

Among the crushed materials that have been subjected to the specific gravity separation due to the repeated pulsation in this way, the heavy specific gravity material that is placed on and attached to the meshed conveyor belt 3 is carried out by the pulley 33 to the outside of the water surface, and the inclined portion thereof. In this case, dehydration is performed, and the product is discharged from the heavy specific gravity discharge device 8 and can be taken out with sufficient accuracy.

Further, the water supply to the jig water tank 1 is adjusted according to the separated state of the crushed material. By changing the water supply amount and the water supply point, the water content can be adjusted according to the type, size and properties of the crushed material. The efficiency of the specific gravity separation can be improved by adjusting the countercurrent water flow to the meshed conveyor belt 3.

In the above embodiment, sludge such as earth and sand and fine particles dropped in the mesh conveyor belt 3 or the U-shaped water tank 2 is taken out from the bottom of the jig water tank 1 by the bucket elevator 9. However, in order to perform the operation during operation, in the case of the bucket elevator 9 shown in FIG. 4, it may be provided in a casing having a water tank communicating with the jig water tank 1, but it may be directly provided in the jig water tank 1. May be.

[0030]

Since the present invention has the above-mentioned structure, the following effects can be obtained by the above jig selecting method for crushed materials. Minerals or crushed wastes such as automobiles and household appliances are conveyed by a conveyor belt with a net to cause pulsation in the jig water to vertically separate the specific gravity from heavy specific gravity to heavy specific gravity. Then
The water flow of jig water is given as a countercurrent to the direction of movement of the meshed conveyor belt, and the light specific gravity part of the crushed material whose specific gravity is vertically separated by the water flow is moved in the water flow direction and discharged. As a result, it is not necessary to make the water flow lateral to the direction of the crushed material and discharge it from the side of the jig water tank as in the conventional case, and the light flow smoothly removes the light specific gravity from the jig water tank. It can be moved to the discharge end, and mixed heavy specific gravity or intermediate specific gravity can be dammed there, dropped on a meshed conveyor belt and repeatedly subjected to specific gravity separation until it is separated into upper layers. Since the light specific gravity that was not present is again discharged by the countercurrent water flow, there is an excellent effect that the accuracy of separation and selection can be improved and the performance can be dramatically improved.

Further, the specific gravity separation due to the pulsation of the jig water is repeatedly performed, and the discharge of the light specific gravity material due to the smooth movement due to the countercurrent causes the length of the water tank for specific gravity separation to be longer than that of the conventional one. This method is carried out because it can be short and even when the gravity specific gravity part of the crushed material separated by the mesh conveyor belt is transported in the traveling direction and discharged from the water tank, the transportation distance can be shortened. There is an excellent effect that the entire length of the device is shortened and the equipment can be shortened.

[Brief description of drawings]

FIG. 1 is a cross-sectional explanatory view showing a jig sorting method for crushed materials according to an embodiment of the present invention.

2 is a plan view of the device of FIG. 1. FIG.

FIG. 3 is an explanatory view of an apparatus for carrying out the jig sorting method of the crushed material of FIG. 1.

FIG. 4 is a cross-sectional view of a main part of the jig selection device of FIG.

FIG. 5 is a plan view of the jig selection device of FIG.

FIG. 6 is a plan view of a conventional crushed material jig selecting device.

FIG. 7 is an explanatory cross-sectional view showing a sorted state of crushed materials in a conventional jig sorting device.

FIG. 8 is a plan view showing the selected state of FIG.

[Explanation of symbols]

 1 Jig water tank 2 U-shaped water tank 3 Conveyor belt with mesh 4 Water jet nozzle 5 which forms a water flow generator 5 Pulsation generator 6 Specific gravity separation device 7 Overflow weir which forms a water flow discharge device 8 Heavy gravity discharge device 9 Bucket elevator 21, 22, 23 Separation chamber 51 Bellows 53 Eccentric sheep 54 Motor 61 Vibration feeder 62 Belt conveyor 72 Weir 73 Draining screen

Claims (5)

(57) [Claims] 1. A crushed material obtained by crushing waste materials such as minerals, automobiles, home appliances, etc. is moved by a conveyor belt with a net moving in the water of a jig water tank so that a metal having a high specific gravity and a specific gravity can be obtained. In a jig selection method of crushed material that can be washed with water while separating it into light nonmetallics, the crushed material supplied on the meshed conveyor belt is used.
Moving the water aquarium the jig causes a pulsation in the jig water to the crushed material is moved
Te, and gravity separation from light density thereof in the vertical direction by the pulsation to heavy specific gravity thereof, giving water as a counter-current direction opposite to the traveling direction of the network with the conveyor belt to the jig water, vertically by the water flow to be a portion of the light density of the gravity separated the crushed material is moved in the direction of water flow for the jig
Discharged from the water bath, and the specific gravity of the portion of the heavy gravity of separated crushed material was transported to the traveling direction of the conveyor belt with the network is discharged from the water tank, crushed material, characterized in that it comprises Jig selection method. 2. The jig selection method for crushed material according to claim 1, wherein the crushed material is supplied to an intermediate portion of the jig water tank, and the water tank is on the opposite side of the heavy tank in the water tank. Overflow discharge of light specific gravity at the end,
A jig sorting method for crushed materials, characterized in that the heavy specific gravity mixed with the light specific gravity which is not discharged by overflow is guided onto the meshed conveyor belt and repeatedly sorted by specific gravity separation. 3. The jig selection method for crushed material according to claim 1, wherein the overflow discharge is adjusted according to the type of the crushed material by the height of a weir for that purpose. The speed of the mesh conveyor belt is adjusted, the jig water supply amount and water supply position are adjusted, and the number of pulsations generated in the jig water and the stroke of the pulsation are adjusted. Jig sorting method for crushed materials. 4. The jig selection method for crushed material according to claim 1, wherein the earth and sand and fine particles that have passed through the mesh of the meshed conveyor belt are carried out from the bottom of the jig water tank during operation. Jig selection method for crushed materials. 5. A jig water tank, which is moved in the water of the jig water tank.
A conveyor belt provided with a mesh , crushed wastes such as minerals, automobiles, household appliances, etc. in the water of the jig water tank
Moved by the belt, together with divided into a heavy metals and specific gravity lighter non-metallic such specific gravity by the movement, in the jig sorting apparatus of crushed material capable of washing the <br/> crushed, aquarium said jig The jig water provided on the outer upper part of the
Generates pulsation in jig water by communicating with the U-shaped water tank
It has a pulsation generator to
Therefore, the crushed material conveyed is transferred by the pulsation generator.
A specific gravity separation device that vertically separates into light specific gravity or heavy specific gravity due to the pulsation of the jig water generated by the jig water, and the mesh for the jig water provided at the top of the jig water tank.
Generates water in the direction opposite to the traveling direction of the attached conveyor belt.
And a water injection nozzle for injecting water for watering,
Receiving a water flow which is caused by Oshimizu from water generator, the water flow generating device which gives the water flow of the jig water as countercurrent against the direction of travel of the conveyor belt with the network by
Has an overflow weir provided at the end of the water tank for
A water flow discharge device for discharging a light specific gravity material of the crushed material that has been gravity-separated in the vertical direction from the overflow weir by the gravity separator, and the water tank end portion in the traveling direction of the meshed conveyor belt.
Provided, jig sorting apparatus of crushed material, characterized in that it comprises a heavy specific gravity evacuation device, for discharging the heavy specific gravity material which has been conveyed by the conveyor belt with the network from the water tub.