High-sulfur coal gangue separation and desulfurization equipment and process

Abstract

The invention relates to the technical field of coal gangue desulfurization, in particular to high-sulfur coal gangue separation and desulfurization equipment and a high-sulfur coal gangue separation and desulfurization process. The technology comprises the following steps that S1, high-sulfur coal gangue is screened and crushed to be below 30 mm, so that pyrite and gangue in the coal gangue are effectively separated; s2, the crushed high-sulfur coal gangue with the diameter smaller than 30 mm enters separation and desulfurization equipment to be subjected to separation treatment, and due to different specific gravities, primary separation pyrite, pure gangue, middling coal and electric coal are obtained through reselection and separation of a jigger; backwashing the middling coal again; according to the process provided by the invention, the high-sulfur coal gangue is crushed and preliminarily separated to obtain primarily separated pyrite, pure gangue and electric coal; crushing and separating the primarily separated pyrite again to obtain pyrite and gangue; pyrite is directly sold, pure gangue is backfilled for land reclamation, and electricity and coal are directly sold; therefore, the process can be used for thoroughly treating the high-sulfur coal gangue, and all classified materials can be comprehensively utilized.

Description

Technical Field

[0001] The invention relates to the technical field of coal gangue desulfurization, in particular to a high-sulfur coal gangue sorting and desulfurization device and process. Background Art

[0002] As an "industrial waste" with all the three hazards of solid, liquid and gas, its long-term storage not only wastes resources and occupies a large amount of land, but also pollutes water sources, soil and surrounding air. According to statistics from relevant departments, the total accumulated stock of coal gangue in my country over the years is about 4.5 billion tons, and the annual discharge is 300 million tons. Regarding the treatment of coal gangue, the national "Key Points of Technology Policy for Comprehensive Utilization of Coal Gangue" points out that the comprehensive utilization of coal gangue focuses on large-scale utilization, and takes coal gangue power generation, coal gangue building materials and products, reclamation and backfilling, and harmless treatment of coal gangue mountains as the main direction of large-scale utilization of coal gangue technology, and develops high-tech, large-scale, high-value-added comprehensive utilization technology and products for coal gangue; among them, reclamation and backfilling, filling pits to create land (i.e. filling coal gangue into valleys to create land) is the only treatment method that can utilize coal gangue in large quantities.

[0003] However, the treatment of high-sulfur coal gangue has always been a major problem. Guizhou coal is lean and thin, with thin coal seams and an average sulfur content of 4%. High-sulfur coal accounts for as much as 35.08%. As the waste of high-sulfur coal mines, high-sulfur coal gangue contains 8-14% sulfur, and when the sulfur content of coal gangue is greater than 3%, it will spontaneously combust. It cannot be directly piled up and backfilled for treatment, but must be desulfurized. In addition, the coal gangue also contains a certain amount of coal. In order to improve the comprehensive utilization rate, the coal needs to be extracted. At present, the desulfurization of high-sulfur coal gangue is either treated by chemical methods after ball milling, which is costly and has low yields; or by flotation technology after ball milling, which also has high power consumption and low yields. Summary of the invention

[0004] In order to make up for the shortcomings of the prior art, the present invention proposes a high-sulfur coal gangue sorting and desulfurization equipment and process. The process provided by the present invention crushes and preliminarily sorts the high-sulfur coal gangue to obtain primary pyrite and pure gangue, and power coal; then the primary pyrite is crushed and sorted again to obtain pyrite and gangue; the pyrite is sold directly, the pure gangue is backfilled to create land, and the power coal is sold directly; in this way, the process thoroughly treats the high-sulfur coal gangue, and all classified materials can be comprehensively utilized; and the process has a large processing capacity and low energy consumption; in the process provided by the present invention, all sewage is recycled after treatment, realizing a primary closed-loop circulation without external discharge; the process provided by the present invention comprehensively utilizes all resources in the high-sulfur coal gangue, and the sorting adopts physical gravity separation, the process is simple, and the feasibility is strong.

[0005] The technical solution adopted by the present invention to solve the technical problem is: a high-sulfur coal gangue separation and desulfurization process described in the present invention, the steps of the process are as follows:

[0006] S1: Screen and crush high-sulfur coal gangue to less than 30 mm to separate the pyrite and gangue in the coal gangue;

[0007] S2: The crushed high-sulfur coal gangue with a size below 30 mm is sent to the sorting and desulfurization equipment for sorting. Due to different specific gravities, it is sorted into primary pyrite, pure gangue, medium coal, and thermal coal through the sorting and desulfurization equipment; the medium coal is backwashed again;

[0008] S3: The primary pyrite after sorting is dehydrated and enters the buffer bin;

[0009] S4: The water under the screen of the curved screen and the linear screen enters the under-screen water pool and is pumped into the cyclone for concentration and classification. The bottom flow enters the spiral chute for sorting to obtain power coal and primary fine pyrite. The primary fine pyrite enters the pyrite spiral chute for further sorting.

[0010] S5: The primary pyrite in the buffer bin is crushed to 5mm and enters the sawtooth wave jig for sorting. The underflow and overflow enter the dewatering screen for dewatering to obtain pyrite and gangue with a grade of 35-38%;

[0011] S6: the water under the sieve of the pyrite dewatering screen and the gangue dewatering screen enters the pyrite spiral chute for sorting, and is sorted into fine-grained pyrite and fine-grained gangue, and then dehydrated to obtain fine-grained pyrite and fine-grained gangue;

[0012] S7: The overflow from the concentration and the water under the high-frequency screen enter the concentrator for concentration treatment, and then the overflow enters the clean water tank for recycling. The bottom flow is filtered by a filter press to obtain tailings.

[0013] A high-sulfur coal gangue sorting and desulfurization equipment, which is suitable for the above-mentioned high-sulfur coal gangue sorting and desulfurization process, and the sorting and desulfurization equipment comprises a body and a sorting chamber on the upper part of the body; an inclined feeding trough is arranged at the left end of the sorting chamber; a tail trough is arranged at the right end of the sorting chamber; two support plates are fixedly connected to the top of the feeding trough; an upper roller and a lower roller are rotatably connected between the two support plates; a connecting block is movably sleeved on the upper roller and the lower roller along the axial direction; an oblique annular groove is obliquely arranged on the outer wall of the upper roller along the axial direction; a movable block is movably connected in the oblique annular groove; the movable block is fixedly connected to the inner side of the upper end of the connecting block; a storage groove is arranged in the middle position of the lower end of the connecting block; a toggle piece is axially sleeved on the outer wall of the lower roller; the toggle piece is in the shape of a long strip; the lower end of the toggle piece is inclined downward and away from the lower roller; the upper end of the toggle piece is located in the storage groove and can move axially along the outer wall of the lower roller; the upper roller is driven by a motor.

[0014] Preferably, the feed trough wall is vertically provided with limit grooves; the two limit grooves are slidably connected to the limit bars up and down; the upper end surface of the limit bar is rotatably connected to the bolt; the bolt is threadedly connected to the feed trough; the lower end of the toggle member is located below the limit bar.

[0015] Preferably, there are multiple toggle members; the multiple toggle members are distributed along the width direction of the feed trough; the number of the connecting blocks is consistent with the number of the toggle members; the inclination directions of the two adjacent oblique ring grooves on the outer wall of the upper roller are opposite; the adjacent connecting blocks are arranged in opposite directions of movement along the axial direction of the upper roller.

[0016] Preferably, the upper end of the connecting block is sleeved on the outer wall of the upper roller through the upper hole; the inner wall of the upper hole is provided with an anti-stuck groove along the axial direction of the upper roller; the movable block is connected to the anti-stuck groove in a sliding manner along the axial direction of the upper roller; the front and rear sides of the movable block are connected to the anti-stuck groove wall through an anti-stuck spring.

[0017] Preferably, the toggle member is composed of a driving sleeve, a driven wheel, a strip plate and a belt; the outer wall of the lower roller is provided with a slide groove along the axial direction; a plurality of sliders are slidably connected in the slide groove; the driving sleeve is movably sleeved on the outer wall of the lower roller and is located in the storage groove; the slider is fixedly connected to the inner side of the driving sleeve; the upper end of the strip plate is sleeved on the outer wall of the lower roller and is located in the storage groove; the two strip plates are rotatably connected to the driven wheel between the lower ends; the outer wall of the driving sleeve and the driven wheel are transmission-connected with a belt; the upper roller end and the lower roller end are both fixedly connected to the cylindrical gear; the two cylindrical gears are meshed with each other; the lower roller end is fixedly connected to the output shaft of the motor; the outer wall of the motor is fixedly connected to the outer wall of the feed trough.

[0018] Preferably, the inner wall of the storage groove is arranged in contact with the outer wall of the belt; and the lower surface of the belt is transmitted from right to left.

[0019] Preferably, the edge of the strip plate contacts the inner wall of the belt; the support rollers are rotatably connected between two corresponding strip plates; a plurality of the support rollers are distributed along the length direction of the strip plate; adjacent support rollers are arranged close to each other; the belt is made of elastic material; and the belt is recessed into the avoidance gap between adjacent support rollers under material extrusion.

[0020] Preferably, the lower edge of the limit strip is corrugated in the length direction; the lower end of the toggle member will fluctuate up and down when it contacts the lower edge of the limit strip and moves along the length direction of the limit strip.

[0021] The beneficial effects of the present invention are as follows:

[0022] 1. The process provided by the present invention crushes and preliminarily sorts high-sulfur coal gangue to obtain primary pyrite, pure gangue and power coal; then the primary pyrite is crushed and sorted again to obtain pyrite and gangue; the pyrite is sold directly, the pure gangue is backfilled to create land, and the power coal is sold directly; in this way, the process thoroughly treats the high-sulfur coal gangue, and all classified materials can be comprehensively utilized; and the process has a large processing capacity and low energy consumption; in the process provided by the present invention, all sewage is recycled after treatment, realizing a primary closed-loop cycle without external discharge; the process provided by the present invention comprehensively utilizes all resources in the high-sulfur coal gangue, and the sorting adopts physical gravity separation, the process is simple, and the feasibility is strong.

[0023] 2. The present invention uses multiple toggle members to intercept and toggle the position where the feed trough enters the sorting chamber, thereby preventing the material from piling up and entering the sorting chamber, making the material entering the sorting chamber more uniform in the width direction of the sorting chamber, and improving the subsequent coal gangue sorting effect.

[0024] 3. The present invention limits the moving directions of adjacent toggle members in the axial direction of the upper roller to be opposite, thereby changing the gap between adjacent toggle members to achieve the purpose of preventing sticking. In addition, even if two adjacent toggle members cannot move due to material jamming columns, other toggle members can move with the movement of the corresponding movable blocks, thereby improving the stability of the desulfurization equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present invention is further described below in conjunction with the accompanying drawings and implementation modes.

[0026] Figure 1 It is a process flow chart of an embodiment of the present invention;

[0027] Figure 2 is a flow chart of equipment use in an embodiment of the present invention;

[0028] Figure 3 It is a three-dimensional diagram of the separation and desulfurization equipment in the present invention;

[0029] Figure 4 yes Figure 3 A stereogram from another angle;

[0030] Figure 5 It is a three-dimensional diagram of the feed trough in the present invention;

[0031] Figure 6 yes Figure 5 A cross-sectional view of

[0032] Figure 7 is a three-dimensional diagram of the toggle member of the present invention;

[0033] Figure 8 It is a three-dimensional diagram of the upper roller and the lower roller in the present invention;

[0034] Fig. 9 It is a three-dimensional diagram of the connecting block in the present invention.

[0035] In the figure: body 1, sorting chamber 11, tail trough 12, feeding trough 2, limit groove 21, limit strip 22, bolt 23, support plate 3, upper roller 4, oblique ring groove 41, movable block 42, motor 43, cylindrical gear 44, lower roller 5, slide groove 51, slider 52, connecting block 6, storage groove 61, upper hole 62, anti-stuck groove 63, anti-stuck spring 64, toggle member 7, active sleeve 71, driven wheel 72, strip plate 73, belt 74, support roller 75, avoidance gap 76. DETAILED DESCRIPTION

[0036] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0037] like Figures 1 to 9 As shown, the present invention includes the following embodiments:

[0038] Example 1: A high-sulfur coal gangue separation and desulfurization process, the steps of the process are as follows:

[0039] S1: Screen and crush high-sulfur coal gangue to less than 30mm to effectively separate the pyrite and gangue in the coal gangue;

[0040] S2: The crushed high-sulfur coal gangue with a size below 30 mm is sent to the sorting and desulfurization equipment for sorting. The sorting and desulfurization equipment is a three-stage coal gangue jig. Due to different specific gravities, the sorting and desulfurization equipment sorts the coal gangue into primary pyrite, pure gangue, medium coal, and electric coal. The medium coal is backwashed again.

[0041] S3: The primary pyrite after sorting is dehydrated and then enters the buffer bin; the pure gangue after sorting is dehydrated and then enters the gangue site, and then transported to the backfill site for direct backfilling; the medium coal after sorting is dehydrated and then enters the system for backwashing and sorting again; the thermal coal after sorting is dehydrated in stages by the arc screen, linear screen and centrifuge and then transported to the thermal coal yard;

[0042] S4: The water under the screen of the curved screen and the linear screen enters the under-screen water pool and is pumped into the cyclone for concentration and classification. The bottom flow enters the spiral chute for sorting, and the sorted power coal and the primary fine-grained pyrite are obtained; the sorted power coal enters the high-frequency dewatering screen and the centrifuge for dewatering and is transported to the power coal yard; the primary fine-grained pyrite enters the pyrite spiral chute for further sorting;

[0043] S5: The primary pyrite in the buffer bin is crushed to 5mm and sent to the sawtooth wave jig for sorting. The underflow and overflow are sent to the dewatering screen for dewatering to obtain pyrite and gangue with a grade of 35-38% respectively. The pyrite with a grade of 35-38% is sold directly, and the gangue is transported to the gangue site and directly backfilled at the backfill site;

[0044] S6: the water under the sieve of the pyrite dewatering screen and the gangue dewatering screen enters the pyrite spiral chute for sorting, and is sorted into fine-grained pyrite and fine-grained gangue, and then dehydrated to obtain fine-grained pyrite and fine-grained gangue;

[0045] S7: After the overflow from the concentration and the water under the high-frequency vibrating screen enter the concentrator for concentration treatment, the overflow enters the clean water tank for recycling as circulating water, and the bottom flow is filtered by a filter press to obtain tailings, i.e., coal slime, with a sulfur content of less than 3%, which is backfilled for treatment; wherein, the overflow from the concentration refers to the system circulating clean water used in the present invention;

[0046] The high-sulfur gangue in the present invention contains 5-8% coal and more than 3% sulfur; and most of the sulfur exists in the form of pyrite; the high-sulfur gangue separation and desulfurization process mainly removes the pyrite in the gangue and extracts the coal in the gangue; in this embodiment, the pyrite of the high-sulfur gangue is subjected to a primary selection, and the secondary selection is used to obtain the pyrite with a purity greater than 35%; the primary selection uses a separation and desulfurization equipment, and the secondary selection uses a sawtooth wave jig; the discharge system and the screen plate angle of the separation and desulfurization equipment are specially designed, and the discharge The material system can discharge materials slowly for a long time, so that even when the sulfur content of coal gangue is low and unstable, it can be sorted; and the screen plate angle of the sorting and desulfurization equipment is 5 degrees in the first section, and the screen plate angle of the second and third sections is 3 degrees; due to the different specific gravities of pyrite, gangue and coal, the separation of pyrite, gangue and coal is achieved through gravity separation; the separation particle size of the primary separation in this implementation is 0.5-30mm, the separation particle size of the secondary separation is 0.5-5mm, and the spiral chute separator is used for the separation of 0-0.5mm particle size;

[0047] The process is simple, has large processing capacity, and low energy consumption. It can effectively desulfurize high-sulfur coal gangue; it can sort and process high-sulfur coal gangue with a sulfur content of more than 3% to obtain electric (primary) coal, pure gangue (sulfur less than 3, calorific value less than 400 kcal), pyrite, and tailings; and realize the bulk utilization of high-sulfur coal gangue after treatment;

[0048] In addition, the process of the present invention solves the feasibility of large-scale utilization of high-sulfur coal gangue; the process provided by the present invention crushes and preliminarily sorts the high-sulfur coal gangue to obtain primary pyrite, pure gangue, and electric coal; then the primary pyrite is crushed and sorted again to obtain pyrite and gangue; the pyrite is sold directly, the pure gangue is backfilled to create land, and the electric coal is sold directly; in this way, the process thoroughly treats the high-sulfur coal gangue, and all classified materials can be comprehensively utilized; and the process has a large processing capacity and low energy consumption; in the process provided by the present invention, all sewage is recycled after treatment, realizing a primary closed-loop circulation without external discharge; the process provided by the present invention comprehensively utilizes all resources in the high-sulfur coal gangue, and the sorting adopts physical gravity separation, the process is simple, and the feasibility is strong.

[0049] Embodiment 2: A high-sulfur coal gangue sorting and desulfurization equipment, which is suitable for the above-mentioned high-sulfur coal gangue sorting and desulfurization process, the sorting and desulfurization equipment comprises a body 1 and a sorting chamber 11 on the upper part of the body 1; the left end of the sorting chamber 11 is provided with an inclined feed trough 2; the right end of the sorting chamber 11 is provided with a tail trough 12; the top of the feed trough 2 is fixedly connected with two support plates 3; the upper roller 4 and the lower roller 5 are rotatably connected between the two support plates 3; the upper roller 4 and the lower roller 5 are movably sleeved with a connecting block 6 along the axial direction; the outer surface of the upper roller 4 The wall is provided with an oblique annular groove 41 along the axial direction; a movable block 42 is movably connected in the oblique annular groove 41; the movable block 42 is fixedly connected to the inner side of the upper end of the connecting block 6; a storage groove 61 is provided in the middle position of the lower end of the connecting block 6; a toggle piece 7 is axially sleeved on the outer wall of the lower roller 5; the toggle piece 7 is in a long strip shape; the lower end of the toggle piece 7 is inclined downward and away from the lower roller 5; the upper end of the toggle piece 7 is located in the storage groove 61 and can move axially along the outer wall of the lower roller 5; the upper roller 4 is driven by a motor 43.

[0050] In this embodiment, the feed trough 2 is vertically provided with a limit groove 21; the two limit grooves 21 are slidably connected to the limit bar 22 up and down; the upper end surface of the limit bar 22 is rotatably connected to the bolt 23; the bolt 23 is threadedly connected to the feed trough 2; the lower end of the toggle member 7 is located below the limit bar 22.

[0051] Before the separation and desulfurization equipment is put into use, the bolt 23 is first tightened. The bolt 23 drives the limit bar 22 to move in the limit groove 21 when tightened. The limit bar 22 is located just above the lower end of the toggle member 7. Therefore, the height and position of the limit bar 22 directly affect the upper limit position of the lower end of the toggle member 7. The coal gangue will flow into the separation chamber 11 from the gap between the lower part of the toggle member 7 and the bottom of the feeding trough 2 and the gap between adjacent toggle members 7. The lower end of the toggle member 7 is against the lower limit bar 22 during the material feeding process. The lower the limit bar 22 at the lower end of the toggle member 7 is, the lower the position of the lower end of the toggle member 7 is, so that the material moves along the lower part of the toggle member 7 and the feeding trough 2. The less material flows out from between the bottom of the trough, on the contrary, the closer the limit strip 22 at the lower end of the toggle member 7 is to the upper side, the closer the position of the toggle member 7 at the lower end is to the upper side, so that more material flows out between the lower side of the toggle member 7 and the bottom of the feeding trough 2. In this way, after the position adjustment of the limit strip 22 is completed, the sorting and desulfurization equipment is put into use, and the gangue and water mixed will be poured along the feeding trough 2, and the material will flow along the inclined bottom of the feeding trough 2 toward the sorting chamber 11, and the material will enter between the lower side of the toggle member 7 and the bottom of the feeding trough 2, and the motor 43 will drive the upper roller 4 to rotate, and the upper roller 4 will drive the oblique annular groove 41 to rotate during the rotation, and the oblique annular groove 41 is inclined in the axial direction of the upper roller 4. As the upper roller 4 rotates, the beveled annular groove 41 will move with the movable block 42. Since the beveled annular groove 41 has a drop in the axial direction of the upper roller 4, during the movement of the beveled annular groove 41 and the movable block 42, the connecting block 6 will move back and forth along the axial direction of the upper roller 4. The connecting block 6 will drive the toggle member 7 in the storage groove 61 to move when it moves back and forth along the axial direction of the upper roller 4. In this way, the toggle member 7 will move back and forth along the axial direction of the upper roller 4 driven by the connecting block 6. In addition, the lower end of the toggle member 7 presses the material on the bottom of the feeding trough 2 under the action of gravity, and the toggle member 7 will toggle the material back and forth in the axial direction of the upper roller 4. The toggle member 7 can toggle the material at the bottom of the feed trough 2 in the width direction of the feed trough 2, so that the material in the width direction of the feed trough 2 is dispersed under the toggle of the toggle member 7, so that the distribution of the material in the width direction of the feed trough 2 is more uniform. In addition, there are multiple toggle members 7, and the multiple toggle members 7 intercept the material entering the sorting chamber 11 from the feed trough 2 while toggling it, so that the material is toggled in the process of being intercepted, so that the material in the feed trough 2 is dispersed and enters the sorting chamber 11. After the material is evenly dispersed in the width direction of the sorting chamber 11 and enters the sorting chamber 11, the sorting effect of the sorting chamber 11 is improved to avoid accumulation.

[0052] The jig machine uses the air valve control system to make the water flow in the jig chamber produce periodic up and down pulsating motion, forming a vertical alternating water flow; when the water flow rises, the lighter coal particles (such as power coal and medium coal) rise faster with the water flow, while the heavier pyrite and gangue particles have a higher specific gravity and a faster sedimentation rate, so they move downward in the rising water flow; at the end of the rising water flow, particles of different densities begin to be stratified according to their respective sedimentation rates, with the heavier pyrite and gangue particles concentrated in the lower layer and the lighter coal particles concentrated in the upper layer; when the water flow descends, the particles with larger density (such as pyrite and gangue) pass through the gaps between the lighter particles under the action of the suction force, continue to move downward and Finally, it passes through the screen plate and falls into the lower part of the machine body 1, while the coal particles with lower density are carried up by the rising water flow and covered on the upper layer; through this continuous up and down pulsating movement, the materials are constantly rearranged and layered in the jig chamber, and finally a clear layering effect is formed; after the layering is completed, the different products separated are discharged through different discharge devices: the power coal is discharged through the overflow weir due to its good quality; the medium coal, as the coal of average quality, is discharged through the corresponding discharge port; the primary pyrite and pure gangue are discharged from different discharge ports respectively due to their large specific gravity; the jig can effectively use the specific gravity difference of these materials for accurate separation, and finally obtain relatively pure pyrite products, pure gangue, medium coal and power coal;

[0053] In this embodiment, a plurality of toggles 7 are used to intercept and toggle the position where the feed trough 2 enters the sorting chamber 11, thereby preventing the material from accumulating and entering the sorting chamber 11, making the material entering the sorting chamber 11 more uniform in the width direction of the sorting chamber 11, and improving the subsequent coal gangue sorting effect.

[0054] Embodiment 3: There are multiple toggle members 7; the multiple toggle members 7 are distributed along the width direction of the feed trough 2; the number of the connecting blocks 6 is consistent with the number of the toggle members 7; the two adjacent oblique annular grooves 41 on the outer wall of the upper roller 4 are arranged with opposite inclination directions; the adjacent connecting blocks 6 are arranged with opposite movement directions along the axial direction of the upper roller 4.

[0055] In this embodiment, the upper end of the connecting block 6 is sleeved on the outer wall of the upper roller 4 through the upper hole 62; the inner wall of the upper hole 62 is provided with an anti-stuck groove 63 along the axial direction of the upper roller 4; the inside of the anti-stuck groove 63 is connected to the movable block 42 in an axially sliding manner along the upper roller 4; the front and rear sides of the movable block 42 are connected to the groove wall of the anti-stuck groove 63 through an anti-stuck spring 64.

[0056] During the rotation of the upper roller 4, the upper roller 4 will drive the oblique annular grooves 41 on the outer wall to rotate. Since the inclination directions of adjacent oblique annular grooves 41 on the outer wall of the upper roller 4 are opposite, the upper roller 4 drives multiple oblique annular grooves 41 and the corresponding movable blocks 42 to move. The movable blocks 42 will move axially in the axial direction of the upper roller 4. The directions of the axial movement of adjacent movable blocks 42 along the upper roller 4 are opposite. The movable blocks 42 will drive the corresponding connecting blocks 6 and the toggle members 7 to move, so that the adjacent toggle members 7 will cyclically approach and move away from each other, so that The gaps between adjacent toggle members 7 are variable, so as to avoid the material being stuck in the gaps between adjacent toggle members 7, causing the gaps between the toggle members 7 to be blocked. After the gaps between the adjacent toggle members 7 are blocked, it is difficult for the toggle members 7 to extend into the materials in the feed trough 2 to toggle, affecting the toggle effect of the toggle members 7 on the materials in the width direction of the feed trough 2. By changing the distance between adjacent toggle members 7, this problem is effectively solved. In addition, in order to avoid the obstruction of the material affecting the two toggle members 7 from approaching each other, causing all toggle members 7 to be blocked , an anti-stuck groove 63 for the movable block 42 to slide can be provided in the upper hole 62, so that when the two adjacent movable blocks 42 are driven by the upper roller 4 to approach each other, the two stuck toggle members 7 and the two connecting blocks 6 do not need to approach each other, thereby not affecting the movement of other connecting blocks 6, until the two stuck toggle members 7 move away from each other, the material stuck in the gap will fall from the gap of the adjacent toggle members 7, and the anti-stuck spring 64 plays the role of resetting the movable block 42 in the anti-stuck groove 63, so that when the adjacent toggle members 7 are not blocked by materials, the movable block 42 is in the middle position in the anti-stuck groove 63, ensuring that the toggle member 7 and the connecting block 6 can move with the movement of the movable block 42; this embodiment limits the toggle directions of the adjacent toggle members 7 in the axial direction of the upper roller 4 to be oppositely set, thereby changing the gap between the adjacent toggle members 7 to achieve the purpose of anti-stuck, in addition, even if the two adjacent toggle members 7 cannot move due to the material blocking column, the other toggle members 7 can also move with the movement of the corresponding movable block 42, thereby improving the stability of the desulfurization equipment;

[0057] Since the toggle member 7 can be toggled in two directions along the axis of the lower roller 5, that is, a part of the toggle member 7 is toggled in one direction along the axis of the lower roller 5, and the other part of the toggle member 7 is toggled in another direction along the axis of the lower roller 5, the material is toggled more evenly.

[0058] Embodiment 4: The toggle member 7 is composed of an active sleeve 71, a driven wheel 72, a strip plate 73 and a belt 74; the outer wall of the lower roller 5 is provided with a slide groove 51 along the axial direction; a plurality of sliders 52 are slidably connected in the slide groove 51; the active sleeve 71 is movably sleeved on the outer wall of the lower roller 5 and is located in the storage groove 61; the slider 52 is fixedly connected to the inner side of the active sleeve 71; the upper end of the strip plate 73 is sleeved on the outer wall of the lower roller 5 and is located in the storage groove 61; the two strip plates 73 are rotatably connected to the driven wheel 72 between the lower ends; the outer walls of the active sleeve 71 and the driven wheel 72 are transmission-connected to the belt 74; the ends of the upper roller 4 and the lower roller 5 are both fixedly connected to the cylindrical gear 44; the two cylindrical gears 44 are meshed with each other; the end of the lower roller 5 is fixedly connected to the output shaft of the motor 43; the outer wall of the motor 43 is fixedly connected to the outer wall of the feed trough 2.

[0059] In this embodiment, the inner wall of the storage groove 61 is in contact with the outer wall of the belt 74; the lower surface of the belt 74 is transmitted from right to left.

[0060] In this embodiment, the edge of the strip plate 73 contacts the inner wall of the belt 74; the support roller 75 is rotatably connected between two corresponding strip plates 73; a plurality of the support rollers 75 are distributed along the length direction of the strip plate 73; adjacent support rollers 75 are arranged close to each other; the belt 74 is made of elastic material; and the belt 74 is recessed into the avoidance gap 76 between adjacent support rollers 75 under the extrusion of the material.

[0061] During the rotation of the motor 43, the lower roller 5 is driven to rotate. The end of the lower roller 5 and the end of the upper roller 4 are meshed through the cylindrical gear 44, so the upper roller 4 and the lower roller 5 will rotate. During the rotation of the upper roller 4, the movable block 42 and the connecting block 6 are driven through the oblique ring groove 41 to generate axial movement of the upper roller 4. The connecting block 6 drives the active sleeve 71 in the storage groove 61 and the upper end of the strip plate 73 to move along the axial direction of the lower roller 5. The belt 74 moves back and forth along the axial direction of the lower roller 5 with the movement of the active sleeve 71 and the strip plate 73. The active sleeve 71 drives the slider 52 to slide along the slide groove 51. During the rotation of the upper roller 4, the lower roller 5 also rotates The lower roller 5 rotates, and the chute 51 on the outer wall is driven to rotate during the rotation of the lower roller 5. The chute 51 and the lower roller 5 are driven to move around the center of the lower roller 5, so that the active sleeve 71 is rotated. The active sleeve 71 is driven to drive the belt 74 during the rotation. The belt 74 contacts the material in the feeding trough 2 during the transmission process. The transmission direction of the lower surface of the belt 74 is from right to left, so that the belt 74 can move some of the materials in contact with the belt 74 to the left, that is, back, so that the belt 74 can move the materials in the feeding trough 2 in the width direction and can also move the excess materials back. After being tossed, the material will spread out and move forward again, thereby extending the material feeding path, giving the material enough time to spread out, allowing the material to enter the sorting chamber 11 more evenly in the width direction of the feeding trough 2, thereby improving the subsequent coal gangue sorting effect; in addition, during the rightward movement of the material for feeding, the material will contact the lower surface of the toggle member 7, that is, the lower surface of the belt 74. During the process of the lower surface of the belt 74 being compressed, the support roller 75 provides support for the belt 74, and an approximately triangular avoidance gap 76 is formed between adjacent support rollers 75. The avoidance gap 76 can be used for avoidance during the process of the belt 74 being compressed, so that the belt 74 moves toward the avoidance gap. The gap 76 is recessed, so that the lower surface of the belt 74 becomes corrugated under the dual effects of material extrusion and support roller 75. The corrugated lower surface of the belt 74 can increase the friction with the material, so that the material can be more stably pushed toward the left side. The feeding direction is from left to right, and the material will move right again during the process of being pushed to the left; the belt 74 is restored to a flat state after being transmitted to the active sleeve 71. In addition, since the groove wall of the storage groove 61 is in contact with the outer wall of the belt 74, the material on the outer wall of the belt 74 can be scraped off by the groove of the storage groove 61, so that the material on the belt 74 can be moved to the right for feeding after falling off.

[0062] Embodiment 5: The lower edge of the limit strip 22 is corrugated in the length direction; the lower end of the toggle member 7 fluctuates up and down when it contacts the lower edge of the limit strip 22 and moves along the length direction of the limit strip 22;

[0063] When the material moves to the right and is fed along the gap between the bottom of the toggle piece 7 and the bottom of the feeding trough 2, the material will squeeze the toggle piece 7, so that the lower end of the toggle piece 7 is pressed and contacts the lower edge of the limit strip 22. When the toggle piece 7 moves back and forth along the axial direction of the lower roller 5 under control, the lower end of the toggle piece 7 will keep in contact with the lower edge of the limit strip 22 and move back and forth along the length direction of the limit strip 22. The lower end of the toggle piece 7 will fluctuate up and down, and the upper and lower ends of the adjacent toggle pieces 7 fluctuate in opposite directions, so that the lower ends of the adjacent toggle pieces 7 fluctuate up and down back and forth. During the staggered process, the gaps between adjacent toggle members 7 are less likely to be jammed by materials, allowing the materials to pass through the gaps between adjacent toggle members 7 more smoothly and flow out. It should be noted that most of the materials are fed under the toggle members 7, and some of the materials are fed through the gaps between adjacent toggle members 7. At the same time, the toggle members 7 move in two directions along the axial direction of the lower roller 5, that is, one part of the toggle members 7 moves along the axial front side of the lower roller 5, and the other part of the toggle members 7 moves synchronously along the axial rear side of the lower roller 5, thereby avoiding uneven materials caused by toggling in a single direction.

[0064] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate directions or positional relationships based on the attached Figure 4 The orientation or positional relationship shown is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, it cannot be understood as limiting the scope of protection of the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0065] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A high-sulfur coal gangue separation and desulfurization process, characterized in that: The steps of the process are as follows: S1: Screen and crush high-sulfur coal gangue to less than 30 mm to separate the pyrite and gangue in the coal gangue; S2: The crushed high-sulfur coal gangue with a size below 30 mm is sent to the sorting and desulfurization equipment for sorting. Due to different specific gravities, it is sorted into primary pyrite, pure gangue, medium coal, and thermal coal through the sorting and desulfurization equipment; the medium coal is backwashed again; S3: The primary pyrite after sorting is dehydrated and enters the buffer bin; S4: The water under the screen of the curved screen and the linear screen enters the under-screen water pool and is pumped into the cyclone for concentration and classification. The bottom flow enters the spiral chute for sorting to obtain power coal and primary fine pyrite. The primary fine pyrite enters the pyrite spiral chute for further sorting. S5: The primary pyrite in the buffer bin is crushed to 5mm and enters the sawtooth wave jig for sorting. The underflow and overflow enter the dewatering screen for dewatering to obtain pyrite and gangue with a grade of 35-38%; S6: the water under the sieve of the pyrite dewatering screen and the gangue dewatering screen enters the pyrite spiral chute for sorting, and is sorted into fine-grained pyrite and fine-grained gangue, and then dehydrated to obtain fine-grained pyrite and fine-grained gangue; S7: The overflow from the concentration and the water under the high-frequency screen enter the concentrator for concentration treatment, and then the overflow enters the clean water tank for recycling. The bottom flow is filtered by a filter press to obtain tailings.

2. A high-sulfur coal gangue separation and desulfurization equipment, which is suitable for the high-sulfur coal gangue separation and desulfurization process described in claim 1, characterized in that: The sorting and desulfurization equipment includes a body and a sorting chamber on the upper part of the body; an inclined feeding trough is provided at the left end of the sorting chamber; a tail trough is provided at the right end of the sorting chamber; two support plates are fixedly connected to the top of the feeding trough; an upper roller and a lower roller are rotatably connected between the two support plates; a connecting block is movably sleeved on the upper roller and the lower roller along the axial direction; an oblique annular groove is obliquely provided on the outer wall of the upper roller along the axial direction; a movable block is movably connected in the oblique annular groove; the movable block is fixedly connected to the inner side of the upper end of the connecting block; a storage groove is provided at the middle position of the lower end of the connecting block; a toggle piece is axially sleeved on the outer wall of the lower roller; the toggle piece is in the shape of a long strip; the toggle piece is inclined downward and away from the lower roller at the lower end; the upper end of the toggle piece is located in the storage groove and can move axially along the outer wall of the lower roller; the upper roller is driven by a motor.

3. The high-sulfur coal gangue separation and desulfurization equipment according to claim 2 is characterized in that: The feed trough wall is vertically provided with limit grooves; the two limit grooves are slidably connected to the limit bars up and down; the upper end surface of the limit bar is rotatably connected to the bolt; the bolt is threadedly connected to the feed trough; the lower end of the toggle member is located below the limit bar.

4. The high-sulfur coal gangue separation and desulfurization equipment according to claim 2 is characterized in that: There are multiple toggle members; the multiple toggle members are distributed along the width direction of the feed trough; the number of connecting blocks is consistent with the number of toggle members; the inclination directions of two adjacent oblique ring grooves on the outer wall of the upper roller are opposite; the moving directions of adjacent connecting blocks along the axial direction of the upper roller are opposite.

5. The high-sulfur coal gangue separation and desulfurization equipment according to claim 4 is characterized in that: The upper end of the connecting block is sleeved on the outer wall of the upper roller through the upper hole; the inner wall of the upper hole is provided with an anti-stuck groove along the axial direction of the upper roller; the movable block is connected in the anti-stuck groove in a sliding manner along the axial direction of the upper roller; the front and rear sides of the movable block are connected to the anti-stuck groove wall through an anti-stuck spring.

6. The high-sulfur coal gangue separation and desulfurization equipment according to claim 2, characterized in that: The toggle member is composed of a driving sleeve, a driven wheel, a strip plate and a belt; a slide groove is arranged on the outer wall of the lower roller along the axial direction; a plurality of sliders are slidably connected in the slide groove; the driving sleeve is movably sleeved on the outer wall of the lower roller and is located in the storage groove; the slider is fixedly connected to the inner side of the driving sleeve; the upper end of the strip plate is sleeved on the outer wall of the lower roller and is located in the storage groove; the two strip plates are rotatably connected to the driven wheel between the lower ends; the driving sleeve and the outer wall of the driven wheel are transmission-connected with the belt; the upper roller end and the lower roller end are both fixedly connected to the cylindrical gear; the two cylindrical gears are meshed with each other; the lower roller end is fixedly connected to the output shaft of the motor; the outer wall of the motor is fixedly connected to the outer wall of the feed trough.

7. The high-sulfur coal gangue separation and desulfurization equipment according to claim 6 is characterized by: The inner wall of the storage groove is in contact with the outer wall of the belt; the lower surface of the belt is transmitted from right to left.

8. The high-sulfur coal gangue separation and desulfurization equipment according to claim 7, characterized in that: The edge of the strip plate contacts the inner wall of the belt; the support rollers are rotatably connected between two corresponding strip plates; a plurality of the support rollers are distributed along the length direction of the strip plate; adjacent support rollers are arranged close to each other; the belt is made of elastic material; and the belt is sunken to the avoidance gap between adjacent support rollers under material extrusion.

9. The high-sulfur coal gangue separation and desulfurization equipment according to claim 3, characterized in that: The lower edge of the limit strip is corrugated in the length direction; the lower end of the toggle member will fluctuate up and down when it contacts the lower edge of the limit strip and moves along the length direction of the limit strip.

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