Air-water granulating system for smelting molten sulfonium and slag

Abstract

The utility model relates to the technical field of pyrogenic process smelting, in particular to an air-water granulating system for smelting molten sulfonium and slag, which comprises a launder, an air quenching nozzle, a water quenching nozzle, an air volume control system and a water spraying control system, the end surfaces of the air quenching nozzle and the water quenching nozzle are flush with the end surface of the launder in the vertical direction; the air quenching nozzle comprises an air inducing pipe, a U-shaped air bellow arranged at one end of the air inducing pipe, a U-shaped connecting flange arranged at one end of the U-shaped air bellow, and a U-shaped air spraying plate arranged on one side of the U-shaped connecting flange; the water quenching nozzle comprises a square-top and round-bottom part, a rectangular connecting flange arranged at one end of the square-top and round-bottom part, and a rectangular water spraying plate arranged on one side of the rectangular connecting flange; according to the smelting molten sulfonium and slag air-water granulation system, the energy consumption of the whole system is reduced, and the slag granularity is controlled, so that the granularity meets the production requirement; and meanwhile, the specially designed air quenching spray head and water quenching spray head can act on the melt more uniformly and stably, so that the granularity is uniform, the granulation effect is good, and the problems of explosion, melt caking, non-uniform particles and the like in the granulation process are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of pyrometallurgy, in particular to a smelting matte and slag feng shui granulation system. Background Art

[0002] In the pyrometallurgical smelting enterprises of non-ferrous metals such as copper and nickel and laterite, the molten matte or slag produced by the metallurgical furnace is a molten body. After cooling, it will form a hard solid, which brings great difficulties to the processing of the next process. Therefore, granulation of high-temperature molten metal matte or slag has become an indispensable link in pyrometallurgical production. At present, most of the granulation of high-temperature molten matte or slag adopts the water quenching method. The water quenching method is to use high-pressure cooling water to rapidly cool the high-temperature molten body by water flow and water pressure. The high-temperature objects are broken and burst due to internal stress to achieve the purpose of granulation.

[0003] At present, most smelting enterprises generally use water quenching to granulate molten matte or slag. Due to the low temperature of water and direct contact with high-temperature molten body, explosion is prone to occur; large amount of water is used; and the particle size after granulation is difficult to control. Utility Model Content

[0004] The utility model aims to provide a smelting matte and slag fengshui granulation system, which is used to solve the problems of easy explosion when using water quenching method for granulation, large amount of water consumption and difficult control of particle size after granulation.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a smelting molten matte and slag wind and water granulation system, including a flow trough, below which are arranged air quenching nozzles and water quenching nozzles arranged at intervals in sequence, and also including an air volume control system and a water spray control system, the end faces of the air quenching nozzles and the water quenching nozzles are arranged flush with the end faces of the flow trough in the vertical direction; the air quenching nozzles include an induced draft duct, a U-shaped bellows arranged at one end of the induced draft duct, a U-shaped connecting flange arranged at one end of the U-shaped bellows, and a U-shaped air spray plate arranged at one side of the U-shaped connecting flange; the water quenching nozzles include a square, a round, a rectangular connecting flange arranged at one end of the square, and a rectangular water spray plate arranged at one side of the rectangular connecting flange.

[0006] Furthermore, the U-shaped air blower plate is provided with an air outlet; the air outlet is composed of a U-shaped opening, and the U-shaped opening is adapted to the shape of the U-shaped air blower plate; or the air outlet is composed of a U-shaped opening and a thin strip-shaped opening, and the thin strip-shaped opening is elliptical or an elongated rectangular.

[0007] Furthermore, a water spray outlet is provided on the rectangular water spray plate; the water spray outlet is composed of a first thin strip-type outlet, and the first thin strip-type outlet is adapted to the shape of the rectangular water spray plate; or the water spray outlet is composed of a first thin strip-type outlet and a second thin strip-type outlet, the length of the first thin strip-type opening is greater than the length of the second thin strip-type opening, and the first thin strip-type outlet is a rectangular strip or an elliptical shape.

[0008] Furthermore, the air volume control system includes an air storage tank, a manual valve, a flow meter, and an electric valve connected in sequence. The electric valve is connected to the air duct through a pipeline, and a pressure gauge is provided between the air duct and the electric valve.

[0009] Furthermore, the water spray control system includes a water source and a variable frequency water pump connected to the water source, and the variable frequency water pump is connected to Tianfangdiyuan.

[0010] Furthermore, the system also includes a control cabinet, which is electrically connected to the flow meter, the electric valve, and the variable frequency water pump.

[0011] Furthermore, sealing gaskets are provided between the rectangular water spray plate and the U-shaped connecting flange, and between the rectangular water spray plate and the rectangular connecting flange.

[0012] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0013] The utility model has the following beneficial effects:

[0014] The smelting molten matte and slag wind and water granulation system can adjust the air and water flow and pressure according to the melt discharge speed through the control cabinet according to the wind and water quenching granulation conditions, reduce the energy consumption of the entire system, and control the slag particle size to meet the production needs; at the same time, the specially designed wind quenching nozzle and water quenching nozzle can act on the melt more evenly and stably, making the particle size uniform and the granulation effect good, avoiding explosions, melt agglomeration, uneven particles and other problems during the granulation process. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the smelting molten matte and slag feng shui granulation system of the utility model;

[0016] Figure 2 This is a schematic diagram of the flow channel structure of the utility model;

[0017] Figure 3 This is a schematic diagram of the structure of the wind quenching nozzle of the utility model;

[0018] Figure 4 This is a schematic diagram of the structure of the U-shaped air jet plate of the utility model;

[0019] Figure 5 This is a schematic diagram of the structure of the U-shaped air jet plate of the utility model;

[0020] Figure 6 This is a schematic diagram of the structure of the U-shaped air jet plate of the utility model;

[0021] Figure 7 This is a schematic diagram of the structure of the water quenching nozzle of the utility model;

[0022] Figure 8This is a schematic diagram of the structure of a rectangular water spray plate of the utility model;

[0023] Fig. 9 This is a schematic diagram of the structure of a rectangular water spray plate of the utility model;

[0024] Fig.10 This is a schematic diagram of the structure of a rectangular water spray plate of the utility model;

[0025] Fig.11 This is the control block diagram of the utility model system.

[0026] In the figure: 1. flow trough; 2. air quenching nozzle; 3. water quenching nozzle; 4. U-shaped bellows; 5. induced draft duct; 6. U-shaped air spray plate; 7. air outlet; 8. square sky and round earth; 9. rectangular water spray plate; 10. water spray outlet; 11. U-shaped connecting flange; 12. rectangular connecting flange; 13. gas storage tank; 14. manual valve; 15. flow meter; 16. electric valve; 17. pressure gauge; 18. variable frequency water pump; 19. water source. DETAILED DESCRIPTION

[0027] See also Figure 1-11 , smelting molten matte and slag wind and water granulation system, including flow channel 1, adopting V-shaped flow channel 1, increasing the cross-sectional area of ​​the discharge port, so that the melt is fully in contact with wind and water, increasing the heat dissipation area, and realizing complete granulation of the melt. The structure of the V-shaped flow channel 1 is shown in the attached manual Figure 2 ; Below the flow channel 1, air quenching nozzles 2 and water quenching nozzles 3 are arranged in sequence at intervals, and the melt is granulated by air and water cooling; the air quenching nozzles 2 and water quenching nozzles 3 are fixed on the corresponding racks or frames or other fixed structures in the workshop; it also includes an air volume control system and a water spray control system, and the end faces of the air quenching nozzles 2 and the water quenching nozzles 3 are arranged flush with the end face of the flow channel 1 in the vertical direction; the air quenching nozzle 2 includes an air duct 5 and a U-shaped bellows 4 arranged at one end of the air duct 5 , a U-shaped connecting flange 11 arranged at one end of the U-shaped bellows 4, and a U-shaped air spray plate 6 arranged on one side of the U-shaped connecting flange 11; the water quenching nozzle 3 includes a round shape 8, a rectangular connecting flange 12 arranged at one end of the round shape 8, and a rectangular water spray plate 9 arranged on one side of the rectangular connecting flange 12; the water quenching uses cooling water, and the cooling water after water quenching is precipitated and filtered in a water pool and then recycled. The system water pressure is 0.3-0.5MPa, and the flow rate is 2000-3000m3 / h.

[0028] The U-shaped air jet plate 6 is provided with an air outlet 7; the air outlet 7 is composed of a U-shaped opening, and the U-shaped opening is adapted to the shape of the U-shaped air jet plate 6; or the air outlet 7 is composed of a U-shaped opening and a thin strip opening, and the thin strip opening is a substantially elliptical or elongated rectangular shape; the structure of the U-shaped air jet plate 6 is shown in the attached manual Figure 4-6Three specifications of U-shaped air spray plates 6 are equipped according to the on-site conditions. The main purposes are: one is to adjust the air volume according to the melt discharge speed during trial production, and the other is to facilitate the replacement of the U-shaped air spray plate 6; the air outlet 7 is designed according to the melt flow rate and flow rate, so that the melt can be broken and cooled by the wind when it flows out of the flow channel 1.

[0029] A water spout 10 is provided on the rectangular water spray plate 9; the water spout 10 is composed of a first thin strip outlet, and the first thin strip outlet is adapted to the shape of the rectangular water spray plate 9; or the water spout 10 is composed of a first thin strip outlet and a second thin strip outlet, the length of the first thin strip opening is greater than the length of the second thin strip opening, and the first thin strip outlet is a rectangular strip or elliptical; the structure of the rectangular water spray plate 9 is shown in the attached manual Figure 8-10 , equipped with three specifications of rectangular water spray plates 9, the three different specifications of rectangular water spray plates 9 can be replaced, the reasons are: one is to adjust the water spray volume according to the melt discharge speed during trial production, the other is to facilitate the replacement of the rectangular water spray plate 9; water quenching is a supplement to the air quenching system, air quenching is a primary cooling and granulation, water quenching is a secondary cooling and granulation; through two cooling and granulation, the purpose of thorough granulation is achieved.

[0030] The system also includes a control cabinet, which is electrically connected to a flow meter 15, an electric valve 16, and a variable frequency water pump 18; the flow meter 15, the electric valve 16, and the variable frequency water pump 18 are controlled by the control cabinet; the air volume control system includes an air storage tank 13, a manual valve 14, a flow meter 15, and an electric valve 16 connected in sequence, the electric valve 16 is connected to the induced draft pipe 5 through a pipeline, a pressure gauge 17 is provided between the induced draft pipe 5 and the electric valve 16, and compressed air is used as the wind quenching medium, with an air pressure of 0.8-1.0MPa and a flow rate of 3000-5000Nm3 / h , according to the fluid discharge flow rate, the wind flow and pressure are controlled, and parameters such as wind flow and pressure can be displayed and controlled on the control cabinet; the water spray control system includes a water source 19, a variable frequency water pump 18 connected to the water source 19, and the variable frequency water pump 18 is connected to the Tianfangdiyuan 8; the water flow and pressure can be displayed and controlled on the control cabinet; the system is equipped with a control system, which can automatically adjust the wind and water flow and pressure according to the discharge speed; the control cabinet is equipped with a human-machine interface, and has a MODBUS / TCP communication interface, which can communicate with the production control system.

[0031] Sealing gaskets are provided between the rectangular water spray plate 9 and the U-shaped connecting flange 11, and between the rectangular water spray plate 9 and the rectangular connecting flange 12; by providing the sealing gaskets, the sealing between the rectangular water spray plate 9 and the U-shaped connecting flange 11, and between the rectangular water spray plate 9 and the rectangular connecting flange 12 is improved.

[0032] Working principle: The entire process of melt granulation is divided into four specific links: granulation preparation, discharge, granulation, and discharge.

[0033] 1. Granulation preparation: open the air volume control system (including the air tank 13, the air pipe connected to the induced draft pipe 5 and the air tank 13, the manual valve 14 installed on the air pipe section, the flow meter 15, the electric valve 16, and the pressure gauge 17), adjust the compressed air pressure to 0.8-1.0MPa, and the flow rate to 3000-5000Nm3 / h; open the water spray control system (water source 19, water pipe, variable frequency water pump 18), adjust the water pressure to 0.3-0.5MPa, and the flow rate to 2000-2500m3 / h; after the air pressure and water pressure are stable, prepare for discharge;

[0034] 2. Discharge: Check the condition of launder 1 and bake launder 1 as appropriate; measure the melt temperature, and when it reaches the discharge temperature, open the discharge port of launder 1 to allow the melt to flow into launder 1 evenly and smoothly;

[0035] 3. Granulation: When the melt flows out of the end of the flow channel 1, it is blown away by the high-pressure wind blown by the wind quenching nozzle 2 and broken into particles. In the falling process, it is sheared and cooled again by the cooling water sprayed by the water quenching nozzle 3 to achieve the purpose of secondary granulation and cooling. After secondary granulation and cooling, the particles fall into the water pool by their own gravity;

[0036] 4. Discharge: The particles in the pool are discharged through a conveyor, filtered, and transported to the yard for treatment by vehicles;

[0037] According to the wind and water quenching granulation conditions, the flow and pressure of compressed air and cooling water are adjusted; the melt is completely granulated; after adopting the wind and water system, the operation process is stable, which fundamentally eliminates the frequent occurrence of explosion accidents; the particle size of the melt after granulation is uniform and the granulation effect is good.

[0038] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A smelting matte and slag wind and water granulation system, comprising a flow channel (1), below which wind quenching nozzles (2) and water quenching nozzles (3) are arranged in sequence and spaced apart, and also comprises an air volume control system and a water spray control system, characterized in that: The end faces of the air quenching nozzle (2) and the water quenching nozzle (3) are arranged flush with the end face of the flow channel (1) in the vertical direction; the air quenching nozzle (2) comprises an air duct (5), a U-shaped bellows (4) arranged at one end of the air duct (5), a U-shaped connecting flange (11) arranged at one end of the U-shaped bellows (4), and a U-shaped air spray plate (6) arranged at one side of the U-shaped connecting flange (11); the water quenching nozzle (3) comprises a square (8), a rectangular connecting flange (12) arranged at one end of the square (8), and a rectangular water spray plate (9) arranged at one side of the rectangular connecting flange (12).

2. The smelting matte and slag feng shui granulation system according to claim 1, characterized in that: The U-shaped air blower plate (6) is provided with an air outlet (7); the air outlet (7) is composed of a U-shaped opening, and the U-shaped opening is adapted to the shape of the U-shaped air blower plate (6); or the air outlet (7) is composed of a U-shaped opening and a thin strip-shaped opening, and the thin strip-shaped opening is elliptical or elongated rectangular.

3. The smelting matte and slag feng shui granulation system according to claim 1, characterized in that: The rectangular water spray plate (9) is provided with a water spray outlet (10); the water spray outlet (10) is composed of a first thin strip outlet, and the first thin strip outlet is adapted to the shape of the rectangular water spray plate (9); or the water spray outlet (10) is composed of a first thin strip outlet and a second thin strip outlet, the length of the first thin strip outlet is greater than the length of the second thin strip outlet, and the first thin strip outlet is a rectangular strip or elliptical.

4. The smelting matte and slag feng shui granulation system according to claim 1, characterized in that: The air volume control system comprises an air storage tank (13), a manual valve (14), a flow meter (15), and an electric valve (16) which are connected in sequence; the electric valve (16) is connected to the air induced pipe (5) via a pipeline; and a pressure gauge (17) is provided between the air induced pipe (5) and the electric valve (16).

5. The smelting matte and slag feng shui granulation system according to claim 1, characterized in that: The water spray control system comprises a water source (19), a variable frequency water pump (18) connected to the water source (19), and the variable frequency water pump (18) is connected to the Tianfangdiyuan (8).

6. The smelting matte and slag feng shui granulation system according to claim 5, characterized in that: The system also includes a control cabinet, which is electrically connected to the flow meter (15), the electric valve (16), and the variable frequency water pump (18).

7. The smelting matte and slag feng shui granulation system according to claim 1, characterized in that: Sealing gaskets are provided between the rectangular water spray plate (9) and the U-shaped connecting flange (11), and between the rectangular water spray plate (9) and the rectangular connecting flange (12).

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