A raw material pretreatment system for yellow phosphorus production

Abstract

This utility model discloses a pretreatment system for yellow phosphorus production raw materials, including a box body. Annular mounting parts are fixedly installed at both ends of the inner cavity of the box body. A secondary screen cylinder is rotatably installed between the two annular mounting parts. A primary screen cylinder is arranged inside the secondary screen cylinder. The rear end of the primary screen cylinder extends beyond the secondary screen cylinder and extends to the outside of the box body. A first discharge port and a second discharge port are provided at the bottom rear end of the box body. Material discharged from inside the secondary screen cylinder falls and is discharged through the first discharge port. This utility model, through the dual screening of the primary and secondary screen cylinders, can accurately screen raw materials within a suitable particle size range, avoiding cumbersome operations such as multiple screenings, saving process steps, improving raw material quality, achieving refined material input into the furnace, and further improving the yield of yellow phosphorus in the production process.

Description

Technical Field

[0001] This utility model relates to a pretreatment system for raw materials used in yellow phosphorus production, and belongs to the technical field of yellow phosphorus production equipment. Background Technology

[0002] Yellow phosphorus is primarily produced via the electric furnace process, using phosphate rock, coke, and silica as raw materials. Improving the yield of yellow phosphorus has always been a persistent problem in the phosphate chemical industry, typically addressed by process optimization. Among these methods, pre-treating the raw materials (such as increasing the grade of phosphate rock and reducing impurities) is the most effective way to increase yellow phosphorus yield. This allows for a more complete reaction in the electric furnace, reducing side reactions and thus increasing the yield. Furthermore, the particle size distribution of the raw materials is also crucial; appropriate particle size improves the permeability of the furnace charge and the reaction contact area, significantly increasing the yellow phosphorus yield.

[0003] In existing technologies, raw materials such as phosphate rock, coke, and silica vary in size and are generally sorted using screening systems. However, existing screening systems are simple in structure and limited in function, only able to roughly separate large and small particle sizes, and cannot precisely screen for suitable particle size ranges. Controlling the particle size distribution of phosphate rock to 10-50 mm improves furnace charge permeability and reaction contact area, while controlling the coke particle size to 5-20 mm matches the phosphate rock particle size, ensuring sufficient contact between the reducing agent and the ore, thereby significantly improving the yield of yellow phosphorus in the production process. Therefore, we propose a pretreatment system for yellow phosphorus production raw materials to meet the requirements of the yellow phosphorus production process. Utility Model Content

[0004] The purpose of this utility model is to provide a pretreatment system for raw materials in the production of yellow phosphorus. It has a novel structure and ingenious design, which can accurately screen raw materials such as phosphate rock, coke, and silica, so as to achieve refined raw material feeding into the furnace and improve the yield of yellow phosphorus in the production process.

[0005] To solve the above-mentioned technical problems, this utility model adopts the following technical solution: a pretreatment system for yellow phosphorus production raw materials, including a box body, with annular mounting parts fixedly installed at both ends of the inner cavity of the box body, and a secondary screen cylinder rotatably installed between the two annular mounting parts. A primary screen cylinder is provided inside the secondary screen cylinder, the screening particle size of the primary screen cylinder being larger than that of the secondary screen cylinder. The rear end of the primary screen cylinder extends beyond the secondary screen cylinder and extends to the outside of the box body. A first discharge port and a second discharge port are provided at the rear end of the bottom of the box body. A discharge port is located below the rear end of the secondary screen cylinder. The material discharged from inside the secondary screen cylinder falls and is discharged through the first discharge port. The second discharge port is located in front of the first discharge port, and a separation baffle is provided between the first and second discharge ports. Fine dust and other small-particle materials screened out by the secondary screen cylinder are discharged through the second discharge port. The bottom of the first and second discharge ports can be equipped with conveying devices such as conveyor belts as needed. A feed hopper is provided at the front end of the box body, and the output end of the feed hopper extends through the box body into the inner cavity of the primary screen cylinder.

[0006] In the aforementioned yellow phosphorus production raw material pretreatment system, a drive motor is installed on the top of one of the annular mounting parts, a gear is installed on the output shaft of the drive motor, and a gear ring is installed on the surface of the secondary screen cylinder near the corresponding annular mounting part. The gear meshes with the gear ring. The drive motor is connected to a control circuit. When the drive motor rotates, it can drive the secondary screen cylinder to rotate through the gear and gear ring.

[0007] In the aforementioned yellow phosphorus production raw material pretreatment system, a bearing is provided on the inner side of the annular mounting part, and the secondary screen cylinder is rotatably mounted on the inner side of the annular mounting part through the bearing.

[0008] In the aforementioned yellow phosphorus production raw material pretreatment system, a guide plate is provided at the bottom of the rear outer wall of the box body. The guide plate is placed below the rear end of the primary screen cylinder and receives the material falling from inside the primary screen cylinder.

[0009] The aforementioned yellow phosphorus production raw material pretreatment system also includes a support frame. A telescopic support column is provided at the top front end of the support frame. The top end of the telescopic support column is hinged to the bottom front end of the box body. The bottom rear end of the box body is hinged to the top rear end of the support frame. The telescopic support column can be a hydraulic telescopic rod. The tilt angle of the secondary screen cylinder can be adjusted by adjusting the telescopic length of the telescopic support column.

[0010] In the aforementioned yellow phosphorus production raw material pretreatment system, the bottom of the support frame is provided with a support leg, and the bottom end of the support leg is provided with a load-bearing fixing component. The load-bearing fixing component is plate-shaped and is used to distribute the overall weight of the equipment and reduce local pressure. The surface of the load-bearing fixing component is provided with fixing holes, and the load-bearing fixing component can be fixed by bolts, expansion bolts, etc., to improve the stability of the equipment during operation.

[0011] In the aforementioned yellow phosphorus production raw material pretreatment system, multiple dust removal components are installed through the upper side wall of the box. One end of each of the multiple dust removal components extending out of the top wall of the box is connected to a dust removal pipeline. The dust removal pipeline is connected to a filter device, and the filter device is connected to a suction fan. The filter device can be a bag filter. When the suction fan is activated, the dust raised inside the box can be sucked into the filter device for collection and treatment.

[0012] In the aforementioned yellow phosphorus production raw material pretreatment system, the outer wall of the primary screen cylinder and the inner wall of the secondary screen cylinder are fixed together by a connecting part, and the primary screen cylinder and the secondary screen cylinder are arranged along the same center.

[0013] The aforementioned yellow phosphorus production raw material pretreatment system includes a spray device installed on the side wall of the box. The spray device is connected to a water pipe that penetrates the side wall of the box. The water pipe is connected to an external water supply component. The spray device can be used as needed to achieve functions such as rinsing equipment, spraying dust removal, and washing materials.

[0014] In the aforementioned yellow phosphorus production raw material pretreatment system, multiple spraying devices are provided and are evenly distributed in a straight line along the length of the box.

[0015] Compared with the prior art, the present invention has at least the following beneficial effects:

[0016] (1) This utility model can accurately screen raw materials within a suitable particle size range through the dual screening of primary and secondary sieves, avoiding tedious operations such as multiple screenings, saving process steps, improving raw material quality, realizing refined material feeding into the furnace, and further improving the yield of yellow phosphorus in the production process.

[0017] (2) This utility model adjusts the tilt angle of the secondary screen cylinder by means of telescopic support, and can adjust the screening accuracy and discharge speed according to the material conditions, so as to ensure smooth discharge while achieving the screening accuracy.

[0018] (3) This utility model is equipped with a dust removal system consisting of dust removal components, dust removal pipelines, filter devices, and suction fans, which can collect and treat the dust generated during material screening and reduce the impact of dust on the environment.

[0019] (4) This utility model can achieve multi-level screening and multi-level output, realize precise control of raw material particle size, and is simple to operate and easy to use. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the cross-section of the box body of this utility model.

[0022] Reference numerals: 1-Box body, 2-Annular mounting part, 3-Secondary screen cylinder, 4-Primary screen cylinder, 5-First discharge port, 6-Second discharge port, 7-Separation baffle, 8-Feeding hopper, 9-Drive motor, 10-Gear, 11-Gear ring, 12-Bearing, 13-Guide plate, 14-Support frame, 15-Telescopic support column, 16-Outrigger, 17-Bearing and fixing component, 18-Dust removal component, 19-Dust removal pipeline, 20-Filter device, 21-Fan suction fan, 22-Water pipe, 23-Connecting part, 24-Spraying device.

[0023] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Detailed Implementation

[0024] Embodiment 1 of this utility model: A pretreatment system for yellow phosphorus production raw materials includes a box body 1. Annular mounting parts 2 are fixedly installed at both ends of the inner cavity of the box body 1. A secondary screen cylinder 3 is rotatably installed between the two annular mounting parts 2. A primary screen cylinder 4 is arranged inside the secondary screen cylinder 3. The particle size of the primary screen cylinder 4 is larger than that of the secondary screen cylinder 3. The rear end of the primary screen cylinder 4 extends beyond the secondary screen cylinder 3 and extends to the outside of the box body 1. A first discharge port 5 and a second discharge port 6 are provided at the bottom rear end of the box body 1. The first discharge port 5 is located within the secondary screen cylinder. Below the rear end, the material discharged from the secondary screen cylinder 3 falls and is discharged through the first discharge port 5. The second discharge port 6 is located in front of the first discharge port 5, and a separation baffle 7 is provided between the first discharge port 5 and the second discharge port 6. Fine dust and other small-particle materials screened out by the secondary screen cylinder 3 are discharged through the second discharge port 6. The bottom of the first discharge port 5 and the second discharge port 6 can be equipped with conveying devices such as conveyor belts as needed. The front end of the box body 1 is provided with a feeding hopper 8, and the output end of the feeding hopper 8 extends through the box body 1 to the inner cavity of the primary screen cylinder 4.

[0025] The outer wall of the primary screen cylinder 4 and the inner wall of the secondary screen cylinder 3 are fixed together by a connecting part 23. The primary screen cylinder 4 and the secondary screen cylinder 3 are arranged along the same center. A guide plate 13 is provided at the bottom of the outer wall of the rear end of the box body 1. The guide plate 13 is placed below the rear end of the primary screen cylinder 4 and receives the material falling inside the primary screen cylinder 4.

[0026] Embodiment 2 of this utility model: A pretreatment system for yellow phosphorus production raw materials includes a box body 1. Annular mounting parts 2 are fixedly installed at both ends of the inner cavity of the box body 1. A secondary screen cylinder 3 is rotatably installed between the two annular mounting parts 2. A primary screen cylinder 4 is arranged inside the secondary screen cylinder 3. The particle size of the primary screen cylinder 4 is larger than that of the secondary screen cylinder 3. The rear end of the primary screen cylinder 4 extends beyond the secondary screen cylinder 3 and extends to the outside of the box body 1. A first discharge port 5 and a second discharge port 6 are provided at the bottom rear end of the box body 1. The first discharge port 5 is located within the secondary screen cylinder. Below the rear end, the material discharged from the secondary screen cylinder 3 falls and is discharged through the first discharge port 5. The second discharge port 6 is located in front of the first discharge port 5, and a separation baffle 7 is provided between the first discharge port 5 and the second discharge port 6. Fine dust and other small-particle materials screened out by the secondary screen cylinder 3 are discharged through the second discharge port 6. The bottom of the first discharge port 5 and the second discharge port 6 can be equipped with conveying devices such as conveyor belts as needed. The front end of the box body 1 is provided with a feeding hopper 8, and the output end of the feeding hopper 8 extends through the box body 1 to the inner cavity of the primary screen cylinder 4.

[0027] Specifically, a drive motor 9 is mounted on the top of one of the annular mounting parts 2, and a gear 10 is mounted on the output shaft of the drive motor 9. A gear ring 11 is mounted on the surface of the secondary screen cylinder 3 near the corresponding annular mounting part 2. The gear 10 and the gear ring 11 mesh with each other. The drive motor 9 is connected to the control circuit. When the drive motor 9 rotates, it can drive the secondary screen cylinder 3 to rotate through the gear 10 and the gear ring 11. A bearing 12 is provided on the inner side of the annular mounting part 2, and the secondary screen cylinder 3 is rotatably mounted on the inner side of the annular mounting part 2 through the bearing 12.

[0028] Embodiment 3 of this utility model: A pretreatment system for yellow phosphorus production raw materials includes a box body 1. Annular mounting parts 2 are fixedly installed at both ends of the inner cavity of the box body 1. A secondary screen cylinder 3 is rotatably installed between the two annular mounting parts 2. A primary screen cylinder 4 is arranged inside the secondary screen cylinder 3. The particle size of the primary screen cylinder 4 is larger than that of the secondary screen cylinder 3. The rear end of the primary screen cylinder 4 extends beyond the secondary screen cylinder 3 and extends to the outside of the box body 1. A first discharge port 5 and a second discharge port 6 are provided at the bottom rear end of the box body 1. The first discharge port 5 is located within the secondary screen cylinder. Below the rear end, the material discharged from the secondary screen cylinder 3 falls and is discharged through the first discharge port 5. The second discharge port 6 is located in front of the first discharge port 5, and a separation baffle 7 is provided between the first discharge port 5 and the second discharge port 6. Fine dust and other small-particle materials screened out by the secondary screen cylinder 3 are discharged through the second discharge port 6. The bottom of the first discharge port 5 and the second discharge port 6 can be equipped with conveying devices such as conveyor belts as needed. The front end of the box body 1 is provided with a feeding hopper 8, and the output end of the feeding hopper 8 extends through the box body 1 to the inner cavity of the primary screen cylinder 4.

[0029] It also includes a support frame 14, with a telescopic support column 15 at the top front end of the support frame 14. The top end of the telescopic support column 15 is hinged to the bottom front end of the housing 1, and the bottom rear end of the housing 1 is hinged to the top rear end of the support frame 14. The telescopic support column 15 can be a hydraulic telescopic rod, and the tilt angle of the secondary screen cylinder 3 can be adjusted by adjusting the telescopic length of the telescopic support column 15. The bottom of the support frame 14 is provided with a support leg 16, and the bottom end of the support leg 16 is provided with a load-bearing fixing component 17. The load-bearing fixing component 17 is plate-shaped and is used to distribute the overall weight of the equipment and reduce local pressure. The surface of the load-bearing fixing component 17 has fixing holes, and the load-bearing fixing component 17 can be fixed by bolts, expansion bolts, etc., to improve the stability of the equipment during operation.

[0030] Embodiment 4 of this utility model: A pretreatment system for yellow phosphorus production raw materials includes a box body 1. Annular mounting parts 2 are fixedly installed at both ends of the inner cavity of the box body 1. A secondary screen cylinder 3 is rotatably installed between the two annular mounting parts 2. A primary screen cylinder 4 is arranged inside the secondary screen cylinder 3. The particle size of the primary screen cylinder 4 is larger than that of the secondary screen cylinder 3. The rear end of the primary screen cylinder 4 extends beyond the secondary screen cylinder 3 and extends to the outside of the box body 1. A first discharge port 5 and a second discharge port 6 are provided at the bottom rear end of the box body 1. The first discharge port 5 is located within the secondary screen cylinder. Below the rear end, the material discharged from the secondary screen cylinder 3 falls and is discharged through the first discharge port 5. The second discharge port 6 is located in front of the first discharge port 5, and a separation baffle 7 is provided between the first discharge port 5 and the second discharge port 6. Fine dust and other small-particle materials screened out by the secondary screen cylinder 3 are discharged through the second discharge port 6. The bottom of the first discharge port 5 and the second discharge port 6 can be equipped with conveying devices such as conveyor belts as needed. The front end of the box body 1 is provided with a feeding hopper 8, and the output end of the feeding hopper 8 extends through the box body 1 to the inner cavity of the primary screen cylinder 4.

[0031] Multiple dust removal components 18 are installed through the upper side wall of the housing 1. One end of each dust removal component 18 extending out of the top wall of the housing 1 is connected to a dust removal pipe 19. The dust removal pipe 19 is connected to a filter device 20. The filter device 20 is connected to a suction fan 21. The filter device 20 can be a bag filter. When the suction fan 21 is started, it can suck the dust raised in the housing 1 into the filter device 20 for collection and treatment.

[0032] Embodiment 5 of this utility model: A pretreatment system for yellow phosphorus production raw materials includes a box body 1. Annular mounting parts 2 are fixedly installed at both ends of the inner cavity of the box body 1. A secondary screen cylinder 3 is rotatably installed between the two annular mounting parts 2. A primary screen cylinder 4 is arranged inside the secondary screen cylinder 3. The particle size of the primary screen cylinder 4 is larger than that of the secondary screen cylinder 3. The rear end of the primary screen cylinder 4 extends beyond the secondary screen cylinder 3 and extends to the outside of the box body 1. A first discharge port 5 and a second discharge port 6 are provided at the bottom rear end of the box body 1. The first discharge port 5 is located within the secondary screen cylinder. Below the rear end, the material discharged from the secondary screen cylinder 3 falls and is discharged through the first discharge port 5. The second discharge port 6 is located in front of the first discharge port 5, and a separation baffle 7 is provided between the first discharge port 5 and the second discharge port 6. Fine dust and other small-particle materials screened out by the secondary screen cylinder 3 are discharged through the second discharge port 6. The bottom of the first discharge port 5 and the second discharge port 6 can be equipped with conveying devices such as conveyor belts as needed. The front end of the box body 1 is provided with a feeding hopper 8, and the output end of the feeding hopper 8 extends through the box body 1 to the inner cavity of the primary screen cylinder 4.

[0033] A spray device 24 is provided on the side wall of the box 1. The spray device 24 passes through the side wall of the box 1 and is connected to a water pipe 22. The water pipe 22 is connected to an external water supply component. The spray device 24 can be used according to actual needs to realize functions such as washing equipment, spraying dust removal, and washing materials. Multiple spray devices 24 are provided and are evenly distributed in a straight line along the length of the box 1.

[0034] The working principle of one embodiment of this utility model is as follows: During use, the material to be processed is conveyed to the primary screen cylinder 4 through the feed hopper 8. The drive motor 9 drives the primary screen cylinder 4 and the secondary screen cylinder 3 to rotate. The primary screen cylinder 4 first screens the material. Large-diameter materials fall onto the guide plate 13 through the tail of the primary screen cylinder 4. Materials with a diameter smaller than the screening diameter of the primary screen cylinder 4 enter the secondary screen cylinder 3. Materials with a suitable diameter in the secondary screen cylinder 3 are discharged through the tail of the secondary screen cylinder 3 to the first discharge port 5. Materials with a diameter smaller than the screening diameter of the secondary screen cylinder 3 enter the housing 1 and are discharged through the second discharge port 6. At the same time, the suction fan 21 can be activated to absorb the dust generated in the housing 1 into the filter device 20 for filtration, collection, and treatment. Furthermore, according to actual needs, the spray device 24 can be used to achieve functions such as washing equipment, spraying dust removal, and washing materials.

[0035] This invention can optimize the particle size distribution of phosphate rock, typically controlled at 10-50mm, improve the permeability of furnace charge and reaction contact area, screen coke particle size, typically 5-20mm, to match the phosphate rock particle size, ensure sufficient contact between the reducing agent and the ore, increase the yellow phosphorus yield from 85-88% in traditional processes to 92-95%, and reduce energy consumption and raw material consumption.

Claims

1. A pretreatment system for raw materials used in the production of yellow phosphorus, characterized in that, The box includes a housing (1), with annular mounting parts (2) fixedly installed at both ends of the inner cavity of the housing (1). A secondary screen cylinder (3) is rotatably installed between the two annular mounting parts (2). A primary screen cylinder (4) is provided in the inner cavity of the secondary screen cylinder (3). The rear end of the primary screen cylinder (4) extends out of the secondary screen cylinder (3) and extends to the outside of the housing (1). A first discharge port (5) and a second discharge port (6) are provided at the bottom rear end of the housing (1). The first discharge port (5) is located below the rear end of the secondary screen cylinder (3). The second discharge port (6) is located in front of the first discharge port (5). A separation baffle (7) is provided between the first discharge port (5) and the second discharge port (6). A feed hopper (8) is provided at the front end of the housing (1). The output end of the feed hopper (8) extends through the housing (1) and into the inner cavity of the primary screen cylinder (4).

2. The yellow phosphorus production raw material pretreatment system according to claim 1, characterized in that, One of the annular mounting parts (2) is equipped with a drive motor (9) on its top. A gear (10) is mounted on the output shaft of the drive motor (9). A toothed ring (11) is mounted on the surface of the secondary screen cylinder (3) near the corresponding annular mounting part (2). The gear (10) meshes with the toothed ring (11).

3. The yellow phosphorus production raw material pretreatment system according to claim 2, characterized in that, A bearing (12) is provided on the inner side of the annular mounting part (2), and the secondary screen cylinder (3) is rotatably mounted on the inner side of the annular mounting part (2) via the bearing (12).

4. The yellow phosphorus production raw material pretreatment system according to claim 1, characterized in that, A guide plate (13) is provided at the bottom of the outer rear wall of the box (1), and the guide plate (13) is placed below the rear end of the primary screen cylinder (4).

5. The yellow phosphorus production raw material pretreatment system according to claim 1, characterized in that, It also includes a support frame (14), the front top of which is provided with a telescopic support column (15), the top of which is hinged to the front bottom of the box (1), and the rear bottom of the box (1) is hinged to the rear top of the support frame (14).

6. The yellow phosphorus production raw material pretreatment system according to claim 5, characterized in that, The bottom of the support frame (14) is provided with a support leg (16), and the bottom end of the support leg (16) is provided with a load-bearing fixing component (17), and the surface of the load-bearing fixing component (17) is provided with a fixing hole.

7. The yellow phosphorus production raw material pretreatment system according to claim 1, characterized in that, Multiple dust removal components (18) are provided through the upper side wall of the box (1). One end of each of the multiple dust removal components (18) extending out of the top wall of the box (1) is connected to a dust removal pipe (19). The dust removal pipe (19) is connected to a filter device (20). The filter device (20) is connected to a suction fan (21).

8. The yellow phosphorus production raw material pretreatment system according to claim 1, characterized in that, The outer wall of the primary sieve cylinder (4) and the inner wall of the secondary sieve cylinder (3) are fixed together by a connecting part (23), and the primary sieve cylinder (4) and the secondary sieve cylinder (3) are arranged along the same center.

9. A pretreatment system for yellow phosphorus production raw materials according to claim 1, characterized in that, The side wall of the box (1) is provided with a spray device (24), and the spray device (24) is connected to a water pipe (22) through the side wall of the box (1). The water pipe (22) is connected to an external water supply component.

10. A pretreatment system for yellow phosphorus production raw materials according to claim 9, characterized in that, The spraying device (24) is provided in multiple units and is evenly distributed in a straight line along the length of the box (1).

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