A high-sulfur coal gangue separation and desulfurization equipment and process

Abstract

The present invention relates to the technical field of desulfurization of coal gangue, specifically a high-sulfur coal gangue separation and desulfurization device and process; the steps of the process are as follows: S1: Screen and crush the high-sulfur coal gangue to less than 30 mm to effectively separate the pyrite and gangue in the coal gangue; S2: Feed the crushed high-sulfur coal gangue below 30 mm into the separation and desulfurization device for separation treatment. Due to different specific gravities, it is separated into primary pyrite, pure gangue, medium coal, and power coal by jigging gravity separation; the medium coal is washed again; the process provided by the present invention obtains primary pyrite, pure gangue, and power coal through preliminary crushing and separation of high-sulfur coal gangue; then the primary pyrite is crushed and separated again to obtain pyrite and gangue; the pyrite is directly sold, the pure gangue is backfilled for land reclamation, and the power coal is directly sold; in this way, the process thoroughly treats the high-sulfur coal gangue, and all classified materials can be comprehensively utilized.

Description

Technical Field

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

[0002] As an "industrial waste" with all three hazards of solid, liquid, and gas, the long-term stacking of coal gangue not only wastes resources, occupies a large amount of land, but also pollutes water sources, soil, and the surrounding air, seriously affecting the ecological environment and the safety of the lives and property of residents; according to statistics from relevant departments, the total accumulated stock of coal gangue stacked in China over the years is approximately 4.5 billion tons, and the annual discharge is 300 million tons; for the treatment of coal gangue, the "Key Points of the Technical Policy for Comprehensive Utilization of Coal Gangue" of the state points out that the comprehensive utilization of coal gangue focuses on large-scale utilization, and regards technologies for large-scale utilization of coal gangue such as coal gangue power generation, coal gangue building materials and products, reclamation backfilling, and harmless treatment of coal gangue mountains as the main attack direction, and develops high-tech, large-volume, and high-value-added coal gangue comprehensive utilization technologies and products; among them, reclamation backfilling and filling pits to create land (that is, backfilling coal gangue into valleys to create land) is the only method for large-scale utilization of coal gangue.

[0003] However, the treatment of high-sulfur coal gangue has always been a major problem. Guizhou coal is lean coal with thin coal seams and high sulfur content, with an average content of 4%, and the proportion of high-sulfur coal is as high as 35.08%. As a waste of high-sulfur coal mines, high-sulfur coal gangue contains sulfur as high as 8-14%, and coal gangue with a sulfur content greater than 3% will self-ignite; it cannot be directly stacked and backfilled for treatment, and must be desulfurized. Moreover, 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, for the desulfurization of high-sulfur coal gangue, either chemical methods are used after ball milling, with high costs and low yields; or flotation processes are used after ball milling, with the same high power consumption and low yields. Summary of the Invention

[0004] In order to make up for the deficiencies of the existing technology, the present invention proposes a high-sulfur coal gangue separation and desulfurization device and process. The process provided by the present invention preliminarily separates the high-sulfur coal gangue by crushing to obtain primary selected pyrite, pure gangue, and power coal; then the primary selected pyrite is crushed and separated again to obtain pyrite and gangue; the pyrite is directly sold, the pure gangue is backfilled to create land, and the power coal is directly sold; in this way, the process of the present invention thoroughly treats high-sulfur coal gangue, and all classified materials can be comprehensively utilized; moreover, the processing capacity of this process is very large and the energy consumption is low; all the sewage in the process provided by the present invention is recycled after treatment, realizing a first-level closed-loop cycle without external discharge; the process provided by the present invention comprehensively utilizes all the resources in high-sulfur coal gangue, and the separation uses physical gravity separation, with a simple process and strong feasibility.

[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 involves initially crushing and preliminarily separating high-sulfur coal gangue to obtain preliminary selected pyrite, pure gangue, and power coal. Then, the preliminary selected pyrite is crushed and separated again to obtain pyrite and gangue. The pyrite is directly sold, the pure gangue is used for backfilling and land reclamation, and the power coal is directly sold. In this way, the process thoroughly treats high-sulfur coal gangue, and all classified materials can be comprehensively utilized. Moreover, the process has a large processing capacity and low energy consumption. All sewage in the process provided by the present invention is recycled after treatment, achieving a first-level closed-loop cycle without external discharge. The process provided by the present invention comprehensively utilizes all resources in high-sulfur coal gangue, and the separation uses physical gravity separation, with a simple process and strong feasibility.

[0023] 2. The present invention intercepts and deflects through multiple deflecting members at the position where the feeding trough enters the separation chamber, thereby preventing materials from piling up and entering the separation chamber, making the materials entering the separation chamber more uniform in the width direction of the separation chamber, and improving the separation effect of subsequent coal gangue.

[0024] 3. The present invention changes the gap between adjacent deflecting members to achieve the anti-jamming purpose by defining that the deflecting directions of adjacent deflecting members in the axial direction of the upper roller are opposite. Additionally, even when two adjacent deflecting members cannot move due to material jamming, other deflecting members can still move with the movement of the corresponding movable blocks, improving the stability of the desulfurization equipment. Description of the Drawings

[0025] The present invention will be further described below in conjunction with the drawings and embodiments.

[0026] Figure 1 is the process flow chart of the embodiment in the present invention;

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

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

[0029] Figure 4 is Figure 3 the three-dimensional view from another angle in;

[0030] Figure 5 is the three-dimensional view of the feeding trough in the present invention;

[0031] Figure 6 is Figure 5 the cross-sectional view of;

[0032] Figure 7 is the three-dimensional view of the deflecting member in the present invention;

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

[0034] Figure 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 35-38% grade pyrite and gangue. The 35-38% grade pyrite is sold directly, and the gangue is transported to the gangue site and directly backfilled at the backfill site;

[0044] S6: The screen water of the pyrite dewatering screen and the gangue dewatering screen enters the pyrite spiral chute for separation, and is separated into fine-grained pyrite and fine-grained gangue. After dehydration respectively, fine-grained pyrite and fine-grained gangue are obtained.

[0045] S7: After the concentrated overflow and the screen water of the high-frequency vibrating screen enter the thickener for concentration treatment, the overflow enters the clear water tank and is recycled as circulating water, and the underflow is filtered by a filter press to obtain tailings, namely slime, with a sulfur content of less than 3%, which is backfilled; among them, the concentrated overflow refers to the circulating clear water used in the system of the present invention.

[0046] The high-sulfur coal 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 process for separating and desulfurizing high-sulfur coal gangue mainly removes pyrite in the coal gangue and extracts coal in the coal gangue; in this embodiment, the pyrite in the high-sulfur coal gangue is subjected to primary preliminary selection and secondary fine selection to obtain pyrite with a purity greater than 35%; the primary preliminary selection uses a separating and desulfurizing device, and the secondary fine selection uses a sawtooth-wave jig; the discharge system and the screen plate angle of the separating and desulfurizing device are specially designed, and the discharge system can discharge materials slowly for a long time, so that separation can be achieved even when the sulfur content of the coal gangue is low and unstable; and the screen plate angle of the first section of the separating and desulfurizing device is 5 degrees, and the screen plate angles of the second and third sections are 3 degrees; due to the different specific gravities of pyrite, gangue, and coal, separation of pyrite, gangue, and coal is achieved by gravity separation; the separation particle size of the primary preliminary selection in this implementation is 0.5-30 mm, and the separation particle size of the secondary fine selection is 0.5-5 mm. For the separation of the particle size of 0-0.5 mm, a spiral chute separator is used for separation.

[0047] This process flow is simple, has a large processing capacity, low energy consumption, and can effectively desulfurize high-sulfur coal gangue; it can separate and process high-sulfur coal gangue with a sulfur content greater than 3% to obtain (raw) coal, pure gangue (sulfur less than 3, calorific value less than 400 kcal), pyrite, and tailings; the bulk utilization of high-sulfur coal gangue after treatment is realized.

[0048] In addition, the process of the present invention solves the feasibility of the bulk utilization of high-sulfur coal gangue; the process provided by the present invention conducts preliminary separation by crushing high-sulfur coal gangue to obtain preliminary selected pyrite, pure gangue, and raw coal; then the preliminary selected pyrite is crushed and separated again to obtain pyrite and gangue; the pyrite is directly sold, the pure gangue is backfilled for land reclamation, and the raw coal is directly sold; in this way, this process thoroughly treats high-sulfur coal gangue, and all classified materials can be comprehensively utilized; moreover, this process has a large processing capacity and low energy consumption; all the sewage in the process provided by the present invention is recycled after treatment, realizing a first-level closed-loop cycle without external discharge; the process provided by the present invention comprehensively utilizes all the resources in high-sulfur coal gangue, and the separation uses physical gravity separation, with a simple process and strong realizability.

[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 sorting and desulfurization equipment is put into use, first turn the bolt 23. When the bolt 23 is turned, it drives the limit bar 22 to move within the limit groove 21. The limit bar 22 is directly above the lower end of the toggling member 7. Therefore, the height and position of the limit bar 22 directly affect the upper limit position of the lower end of the toggling member 7. The coal gangue will flow into the sorting chamber 11 from the gap between the lower part of the toggling member 7 and the bottom of the feed trough 2 and the gap between adjacent toggling members 7. The lower end of the toggling member 7 abuts against the lower part of the limit bar 22 during the material feeding process. The lower the lower end of the toggling member 7 is relative to the limit bar 22, the lower the position of the lower end of the toggling member 7, resulting in less material flowing out along the gap between the lower part of the toggling member 7 and the bottom of the feed trough 2. On the contrary, the higher the lower end of the toggling member 7 is relative to the limit bar 22, the higher the position of the lower end of the toggling member 7, resulting in more material flowing out along the gap between the lower part of the toggling member 7 and the bottom of the feed trough 2. After adjusting the position of the limit bar 22 in this way, the sorting and desulfurization equipment is put into use. After the coal gangue is mixed with water, it will be poured along the feed trough 2. The material will flow towards the sorting chamber 11 along the inclined bottom of the feed trough 2. The material will enter the gap between the lower part of the toggling member 7 and the bottom of the feed trough 2. The motor 43 will drive the upper roller 4 to rotate. During the rotation of the upper roller 4, the inclined ring groove 41 will be driven to rotate. The inclined ring groove 41 is inclined in the axial direction of the upper roller 4. During the rotation of the inclined ring groove 41 along with the upper roller 4, the inclined ring groove 41 will interact with the movable block 42. Since there is a drop in the axial direction of the upper roller 4 for the inclined ring groove 41, during the interaction between the inclined ring groove 41 and the movable block 42, the connecting block 6 will move back and forth axially along the upper roller 4. During the axial back-and-forth movement of the connecting block 6 along the upper roller 4, it will drive the toggling member 7 in the placement groove 61 to move. In this way, the toggling member 7 will move back and forth axially along the upper roller 4 driven by the connecting block 6. In addition, due to the lower end of the toggling member 7 pressing the material on the bottom of the feed trough 2 under the action of gravity, and with the back-and-forth toggling of the toggling member 7 in the axial direction of the upper roller 4, the toggling member 7 can toggle the material on the bottom of the feed trough 2 in the width direction of the feed trough 2. In this way, the material in the width direction of the feed trough 2 is dispersed under the toggling of the toggling member 7, making the distribution of the material in the width direction of the feed trough 2 more uniform. In addition, the number of toggling members 7 is multiple. While multiple toggling members 7 intercept the material entering the sorting chamber 11 from the feed trough 2, they also perform toggling, so that the material is toggled during the interception process, so that the material in the feed trough 2 is dispersed and enters the sorting chamber 11 after being toggled. 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 and accumulation is avoided;

[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] During the process of the material moving to the right and feeding along the gap between the lower part of the toggling member 7 and the bottom of the feeding trough 2, the material will squeeze the toggling member 7, causing the lower end of the toggling member 7 to be pressed and contact the lower edge of the limiting strip 22. During the process of the toggling member 7 moving back and forth along the axial direction of the lower roller 5 under control, the lower end of the toggling member 7 will maintain contact with the lower edge of the limiting strip 22 while moving back and forth along the length direction of the limiting strip 22. The lower end of the toggling member 7 will fluctuate up and down, and the lower ends of adjacent toggling members 7 will fluctuate in opposite directions. In this way, during the process of the lower ends of adjacent toggling members 7 moving up and down and staggering, the gap between adjacent toggling members 7 is not easily blocked by the material, making the material flow through the gap between adjacent toggling members 7 more smoothly and flow out. It should be noted that most of the material is fed under the toggling member 7, and some of the material is fed through the gap between adjacent toggling members 7. Since at the same time, the direction of the toggling member 7 moving along the axial direction of the lower roller 5 is two-way, that is, some of the toggling members 7 move forward along the axial direction of the lower roller 5, and the other part of the toggling members 7 move backward along the axial direction of the lower roller 5 synchronously, avoiding the situation of uneven material caused by toggling in a single direction.

[0064] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or positional relationship based on the attached Figure 4 shown orientation or positional relationship is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the protection scope of the present invention. In addition, the terms "first", "second", "third", etc. are only used for distinguishing descriptions 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. Those skilled in the art of this industry should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended 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 thickener and the water from the high-frequency screen enter the thickener for thickening and then overflow into the clean water tank for recycling. The bottom flow is filtered by a filter press to obtain tailings. The sorting and desulfurization equipment comprises a machine body and a sorting chamber on the upper part of the machine body; an inclined feeding trough is arranged at the left end of the sorting chamber; two supporting plates are fixedly connected to the top of the feeding trough; an upper roller and a lower roller are rotatably connected between the two supporting 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 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.

2. The high-sulfur coal gangue separation and desulfurization process according to claim 1, characterized in that: A tail groove is arranged at the right end of the sorting chamber, and the upper roller is driven by a motor.

3. A high-sulfur coal gangue separation and desulfurization process according to claim 1, 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.

4. A high-sulfur coal gangue separation and desulfurization process according to claim 1, 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.

5. A high-sulfur coal gangue separation and desulfurization process according to claim 4, characterized in that: The toggling member is composed of a driving sleeve, a driven wheel, a strip-shaped plate and a belt; a chute is axially arranged on the outer wall of the lower roller; a plurality of sliders are slidably connected in the chute; the driving sleeve is movably sleeved on the outer wall of the lower roller and is located in the placement groove; the slider is fixedly connected to the inner side of the driving sleeve; the upper end of the strip-shaped plate is sleeved on the outer wall of the lower roller and is located in the placement groove; the driven wheel is rotatably connected between the lower ends of the two strip-shaped plates; the driving sleeve and the outer wall of the driven wheel are drivingly connected with the belt; cylindrical gears are fixedly connected to the ends of both the upper roller and the lower roller; the two cylindrical gears are meshed with each other; the output shaft of the motor is fixedly connected to the end of the lower roller; the outer wall of the motor is fixedly connected to the outer wall of the feeding trough.

6. A high-sulfur coal gangue separation and desulfurization process according to claim 5, characterized in that: The inner wall of the placement groove is in contact with the outer wall of the belt; the lower surface of the belt is driven from right to left.

7. A high-sulfur coal gangue separation and desulfurization process according to claim 6, characterized in that: The edge of the strip-shaped plate is in contact with the inner wall of the belt; a support roller is rotatably connected between two corresponding strip-shaped plates; a plurality of the support rollers are distributed along the length direction of the strip-shaped plate; adjacent support rollers are arranged close to each other; the belt is made of an elastic material; the belt is recessed into the avoidance gap between adjacent support rollers under the extrusion of the material.

8. A high-sulfur coal gangue separation and desulfurization process according to claim 1, characterized in that: The lower edge of the limiting strip is corrugated in the length direction; the lower end of the toggling member will fluctuate up and down when it contacts the lower edge of the limiting strip and moves along the length direction of the limiting strip.

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