Jigging type quick gangue discharging device for washing coal

Abstract

The invention provides a quick gangue discharging device for jigging type washed coal, and belongs to the technical field of jigging coal washers. The jigging type quick gangue discharging device for coal washing comprises a jigging coal washer and a screening mechanism, the jigging coal washer is located at the tail of a jigging chamber and communicated with a gangue discharging channel, the interior of the jigging chamber can be divided into two sections, a taper hole bin bottom plate is obliquely installed at the bottom of a bed layer, and the inclination angle of the bin bottom plate is 5 degrees. During jigging and washing, free falling is accelerated by means of gravity of the gangue, the gangue is rapidly jigged out at a gangue discharging channel in time, the gangue is separated from the gangue discharging channel and a bucket elevator in the shortest time, the purposes of less dissolution and energy saving are expected to be achieved, and therefore the concentration, filter pressing and coal slime generation handling capacity are reduced, no heat is brought out after the gangue is separated in a jigging machine, and the coal slime is recycled. The materials with high density can be directly used as pebbles, so that the maximum energy conservation is realized, the water pollution is reduced, the concentration filter pressing amount is reduced, and the effects of energy conservation and emission reduction are realized.

Description

Technical Field

[0001] The present application relates to the field of jig coal washing machines, and in particular to a fast gangue discharge device for jig-type coal washing. Background Art

[0002] With the continuous development of coal washing technology, the gangue removal process of jigging coal washing is also constantly improving and perfecting. The rapid gangue removal device is particularly important. In the future, the device will pay more attention to the development direction of automation, intelligence and environmental protection and energy saving to meet the needs of more energy-saving, environmental protection and high efficiency. The rapid gangue removal device of jigging coal washing mainly uses the principle of jigging coal selection, that is, the material is stratified and gravity selected according to its physical-mechanical properties (mainly according to density) in a medium dominated by vertical pulsation. During the jigging process, the material is continuously jigged on the fixed moving screen surface. Due to the combined effect of flushing water, top water and horizontal flow of the bed, the material is sorted under the combined force of vertical and horizontal flows. The jigging type gangue coal preparation adopts the so-called CNC technology: "the gangue that falls into the discharge channel early after jigging is accumulated in the gangue discharge channel, and the gangue discharge is started again after the high point melts and the float gives an electrical signal, thereby causing the muddy shale in the gangue to be delayed and dissolved into mud, increasing the processing capacity of the concentrated filter press, resulting in artificial waste, increasing costs and affecting production." Summary of the invention

[0003] In order to make up for the above shortcomings, the present application provides a rapid gangue discharge device for jigging coal washing, which aims to improve the problem that muddy real rock is stagnant and dissolved into mud, increasing the processing capacity of concentrated filter press, causing artificial waste, increasing costs and affecting production.

[0004] An embodiment of the present application provides a rapid gangue discharge device for jigging coal washing, comprising a jigging coal washing machine and a screening mechanism.

[0005] The discharge port of the selection mechanism is connected with the feeding mechanism of the jigging coal washer. A jigging chamber is arranged inside the jigging coal washer. The jigging coal washer has an independent gangue discharge channel at the tail of the jigging chamber. The interior of the jigging chamber can be divided into two sections. A conical hole bin bottom plate is installed at an angle at the bottom of the bed layer. The inclination angle of the bin bottom plate is 5°, which is conducive to pulse feeding. The steps for rapid gangue discharge of jigging coal washing are: Step 1: The mixture of coal and gangue to be washed is transported to the screening mechanism for screening. The screened coal and gangue enter the feeding mechanism. The mixture to be washed with a diameter less than 250 mm is conveyed by a belt for washing. Step 2: The coal and gangue inside the feeding mechanism enter the jigging chamber of the jig coal washer. The coal and gangue entering the jigging chamber are washed by low-pressure wind-assisted water and buoyancy to separate the gangue and coal. The gangue is directly and quickly eliminated through the gangue discharge channel, and the coal floats on the surface and passes through the gate for sorting, dehydration and recovery.

[0006] In a specific embodiment, the longitudinal width of the waste rock discharge channel is changed, and the width of the waste rock discharge channel is reduced by 15%.

[0007] In a specific embodiment, the width of the waste rock discharge channel is 265 mm.

[0008] In a specific embodiment, the concentration of the two-stage washed pulp in the elimination chamber is 25% for the first stage and 20% for the second stage.

[0009] In a specific embodiment, in step 1, the screening mechanism classifies the coal and gangue by size into a primary mixture and a secondary mixture, the primary mixture is fed into a feeder, and the secondary mixture falls into a crushing mechanism for further crushing.

[0010] In a specific implementation, a screen surface is also provided inside the jig coal washer, and the screen surface rises and falls repeatedly in the vertical pulsating medium, thereby achieving stratification of the material.

[0011] In a specific embodiment, a water flushing mechanism is also installed inside the jigging coal washer to provide water flushing to the inside of the jigging chamber to form a vertically pulsating medium.

[0012] In a specific embodiment, the specific gravity of the gangue is 1.4-2.0 g / cm3, 1.4-2.0 T / m3.

[0013] In a specific embodiment, the specific gravity of the coal is 1.2-1.4 T / m3.

[0014] In a specific embodiment, the particle size of the coal and gangue is 1 to 250 mm.

[0015] Beneficial effects: The present application provides a rapid gangue discharge device for jigging-type coal washing. Through the superior concept that the specific gravity of gangue is greater than that of coal, during jigging washing, the gangue is accelerated to free fall by gravity, and is quickly discharged to the gangue discharge channel in a timely manner, leaving the gangue channel and bucket elevator in the shortest time, so as to achieve less dissolution and realize energy saving, thereby reducing the amount of concentration, filtration and coal slime generation and processing, and allowing the gangue to be taken out without heat after sorting in the jig, and can be used directly as stone, thereby achieving maximum energy saving, reducing water pollution, reducing the amount of concentration and filtration, and achieving energy saving and emission reduction effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the implementation methods of the present application, the drawings required for use in the implementation methods will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a schematic diagram of the structure of a rapid gangue discharge device for jigging type coal washing provided in an embodiment of the present application; Figure 2 Provided for the implementation of this application Figure 1 The enlarged structural diagram at A in the middle shows the tapered hole with bottom plate; In the figure: 110-jigging coal washer; 120-bin bottom plate; 130-waste discharge channel. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present application will be described below in combination with the embodiments of the present application and the accompanying drawings.

[0019] See also Figure 1-Figure 2 The present application provides a rapid gangue discharge device for jigging coal washing, including a jigging coal washing machine 110 and a screening mechanism.

[0020] See also Figure 1 and Figure 2 The discharge port of the selection mechanism is connected with the feeding mechanism of the jig coal washer 110. A jig chamber is arranged inside the jig coal washer 110. The jig coal washer 110 has an independent gangue discharge channel 130 at the tail of the jig chamber. The interior of the jig chamber can be divided into two sections. A conical hole bin bottom plate 120 is installed at an angle at the bottom of the bed layer. The inclination angle of the bin bottom plate 120 is 5°, which is conducive to pulse feeding. The steps for rapid gangue discharge of jigging coal washing are: Step 1: transport the coal and gangue to the screening mechanism for screening. The screened coal and gangue enter the feeding mechanism. The mixture to be washed with a size less than 250mm is conveyed by a belt for washing. Step 2: The coal and gangue inside the feeding mechanism enter the jigging chamber of the jigging coal washer 110. The coal and gangue entering the jigging chamber are washed by low-pressure wind-assisted water and buoyancy to separate the gangue and coal. The gangue is directly and quickly eliminated through the gangue discharge channel 130, and the coal floats and passes through the gate plate on the surface for separation, dehydration and recovery. Among them, the difference in specific gravity between coal and gangue is utilized, and the wind-assisted water is used to promote the characteristics of light specific gravity and large buoyancy of coal. The gangue after jumping is promoted to jump high and fall fast, and is discharged into the gangue discharge channel 130. This gangue channel is where coal cannot jump high due to buoyancy, so it can discharge gangue quickly and without restriction, reducing water pollution, increasing production, reducing gangue insolubility, and achieving energy conservation and emission reduction. By increasing the inclination angle of the bin bottom plate 120 from the original 3.5° to 5°, the gate plate can also be adjusted. The specific gravity of gangue is greater than that of coal. During jig washing, the gangue is accelerated to fall freely with the help of its gravity, and is quickly discharged to the gangue discharge channel 130 in a timely manner, leaving the gangue channel and bucket elevator in the shortest time, so as to achieve less dissolution and realize energy saving, thereby reducing the amount of concentration, filtration and coal slime generation and processing, and allowing the gangue to be taken out without heat after sorting in the jig machine, and can be used directly as stone, thereby achieving maximum energy saving, reducing water pollution, reducing the amount of concentration and filtration, and achieving energy saving and emission reduction effects.

[0021] In a specific embodiment, the longitudinal width of the gangue discharge channel 130 is changed, and the width of the gangue discharge channel 130 is reduced by 15%. The width of the gangue discharge channel 130 is 265 mm. By changing the width of the gangue discharge channel 130 from the original 300 mm to the current 265 mm, the recovery rate can also be increased, and the heat in the gangue can be taken out, so that it can be used as stone.

[0022] In a specific implementation, the concentration of the two-stage mixed slurry in the sieving chamber is 25% for the first stage and 20% for the second stage. The specific gravity of the slurry increases with the concentration, so it also plays a role as a medium, which is conducive to jigging and sorting. Ignoring the concern that coal sinks into gangue, it can be said that the gangue discharge channel will not enter the coal. Then the gangue retention is a misunderstanding. It is a wrong and pseudo-science to artificially stack the gangue until the height reaches the melting point and the signal is received before mechanical gangue discharge. Because the specific gravity of gangue is large, it can sink into the bucket elevator and be discharged as soon as possible after entering the gangue channel, so as to achieve energy saving and reduce water pollution to the maximum extent, and reduce the amount of concentrated filtration, that is, energy saving and emission reduction.

[0023] In a specific implementation scheme, in step 1, the screening mechanism classifies the coal and gangue by size into a primary mixture and a secondary mixture. The primary mixture is fed into the feeder, and the secondary mixture (when the middle coal section is mixed with gangue) falls into the crushing mechanism for further crushing.

[0024] In a specific embodiment, a screen surface is further provided inside the jigging coal washer 110, and the screen surface rises and falls repeatedly in the vertical pulsating medium, thereby achieving stratification of the material.

[0025] In a specific embodiment, a flushing mechanism is also installed inside the jig coal washer 110 to provide flushing water to the inside of the jigging chamber to form a vertically pulsating medium. The flushing system includes a flushing system and a top water system. The flushing system mainly includes parts such as a water source, a pipeline, a valve, and a water distribution device. The water source usually comes from the water circulation system or the external water supply system of the coal washing plant, and is transported to the coal feeding direction of the jig through a pipeline. The valve is used to adjust and control the flow and pressure of the flushing water to ensure that the flushing water can be evenly distributed on the coal. The water distribution device is responsible for spraying the flushing water evenly on the surface of the coal to moisten and break up the coal.

[0026] In a specific embodiment, the specific gravity of the gangue is 1.4-2.0 g / cm3, 1.4-2.0 T / m3.

[0027] In a specific embodiment, the specific gravity of the coal is 1.2-1.4 T / m3.

[0028] In a specific embodiment, the particle size of the coal and gangue is 1 to 250 mm.

[0029] Working principle of the rapid gangue discharge device of the jigging type coal washing: Taking advantage of the difference in specific gravity between coal and gangue, and using wind and water to promote the characteristics of coal with light specific gravity and large buoyancy, the gangue after jumping will jump high and fall quickly, and be discharged into the gangue discharge channel. This gangue channel is where coal cannot enter due to its buoyancy. Therefore, the gangue can be discharged quickly and without restriction, reducing water pollution, increasing production, reducing gangue insolubility, and achieving energy conservation and emission reduction. This is the highlight of the invention. By increasing the inclination angle of the bin bottom plate 120 from the original 3.5° to 5°, the gate plate can also be adjusted. The specific gravity of gangue is greater than that of coal. During jig washing, the gangue is accelerated to fall freely with the help of its gravity, and is quickly discharged to the gangue discharge channel in a timely manner, leaving the gangue channel and bucket elevator in the shortest time, so as to achieve less dissolution and realize energy saving, thereby reducing the amount of concentration, filtration and coal slime generation and processing, and allowing the gangue to be taken out without heat after sorting in the jig machine, and can be used directly as stone, achieving maximum energy saving, reducing water pollution, reducing the amount of concentration and filtration, and achieving energy saving and emission reduction effects.

[0030] The above description is only an embodiment of the present application and is not intended to limit the protection scope of the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A fast gangue discharge device for jigging type coal washing, characterized in that: include A jigging coal washer (110), wherein the discharge port of the selection mechanism is connected to the feeding mechanism of the jigging coal washer (110), a jigging chamber is arranged inside the jigging coal washer (110), an independent gangue discharge channel (130) is provided at the tail of the jigging chamber of the jigging coal washer (110), the interior of the jigging chamber can be divided into two sections, a conical hole bin bottom plate (120) is obliquely installed at the bottom of the bed layer, and the inclination angle of the bin bottom plate (120) is 5°, which is conducive to pulse feeding; The steps for rapid gangue discharge of jigging coal washing are: Step 1: transport the raw coal containing gangue to the screening mechanism for screening. The screened coal and gangue enter the feeding mechanism. The mixture to be washed with a size less than 250mm is conveyed by a belt conveyor for washing. Step 2: The coal and gangue inside the feeding mechanism enter the jigging chamber of the jig coal washer (110). The coal and gangue entering the jigging chamber are washed by low-pressure wind-assisted water and buoyancy to separate and stratify the gangue and coal. The gangue is directly and quickly eliminated through the gangue discharge channel (130), and the coal floats and passes through a gate plate on the surface for separation, dehydration and recovery (the gate plate is adjustable).

2. A fast gangue discharge device for jigging type coal washing according to claim 1, characterized in that: The longitudinal width of the waste rock discharge channel (130) is changed, and the width of the waste rock discharge channel (130) is reduced by 15%.

3. A fast gangue discharge device for jigging type coal washing according to claim 2, characterized in that: The width of the waste rock discharge channel (130) is 265 mm.

4. A jigging type coal washing and fast gangue discharge device according to claim 1, characterized in that: The concentration of the two-stage mixed pulp inside the elimination chamber is 25% for the first stage and 20% for the second stage.

5. A fast gangue discharge device for jigging type coal washing according to claim 1, characterized in that: In step 1, the screening mechanism classifies the coal and gangue by size into a primary mixture and a secondary mixture. The primary mixture is fed into the feeder, and the secondary mixture falls into the crushing mechanism for further crushing (raw coal processing).

6. A fast gangue discharge device for jigging type coal washing according to claim 1, characterized in that: The jigging coal washer (110) is also provided with a screen surface inside, and the screen surface rises and falls repeatedly in the vertical pulsating medium, thereby achieving pulsating stratification of the material.

7. A fast gangue discharge device for jigging type coal washing according to claim 1, characterized in that: The jigging coal washer (110) is also provided with a bellows flushing mechanism for providing flushing water to the interior of the jigging chamber to form a vertically pulsating medium.

8. A fast gangue discharge device for jigging type coal washing according to claim 1, characterized in that: The specific gravity of gangue is 1.4-2.0 g / cm 3 1.4-2.0T / m 3 .

9. A fast gangue discharge device for jigging type coal washing according to claim 1, characterized in that: The specific gravity of coal is 1.2-1.4T / m 3 .

10. A fast gangue discharge device for jigging type coal washing according to claim 1, characterized in that: The particle size of coal and gangue is 1 to 250 mm.

Images