Water-gas mixing automatic adjusting type yellow phosphorus slag water-quenched slag granulating system

Abstract

The invention discloses a water-gas mixing automatic adjusting type yellow phosphorus slag water-quenched slag granulation system which comprises a water supply system, a gas supply system, a submerged arc furnace and a granulator, the gas supply system comprises an air compressor, a pressure tank and a gas pipe, one end of the gas pipe is communicated with the granulator, the air compressor and the pressure tank are mutually connected through the gas pipe, a one-way valve is arranged between the pressure tank and the air compressor, and the one-way valve is connected with the gas pipe. An air pressure adjusting system is arranged between the granulator and the pressure tank; the water supply system comprises a sedimentation tank, a water pump, a vacuum pump and a water pressure adjusting system which are sequentially communicated through water pipes; a filter is arranged between the sedimentation tank and the water pump; one ends of the water supply system and the gas supply system are jointly communicated with the granulator, and a cleaning system is arranged between the water supply system and the gas supply system; the granulator is arranged below the slag chute to impact the slag water for granulation; the gas supply system and the water supply system are matched to supply gas and water to the pelletizer to form a water-gas mixture, and the water-gas mixture is sprayed out by the pelletizer to carry out slag quenching and pelletizing on yellow phosphorus slag water flowing out of the slag chute.

Description

Technical Field

[0001] The invention belongs to the technical field of liquid slag water quenching slag granulation, and in particular relates to a water-gas mixing automatic regulating type yellow phosphorus slag water quenching slag granulation system. Background Art

[0002] Yellow phosphorus slag water is produced during the production process. The yellow phosphorus slag water contains harmful substances. If it is directly discharged into the soil, it will change the chemical properties of the soil, destroy the soil structure and fertility. If it is directly discharged into the water, it will destroy the aquatic ecology.

[0003] There are many process methods for treating yellow phosphorus slag water, among which air quenching granulation is a commonly used method; high-pressure gas is used to impact the yellow phosphorus slag water to disperse, cool and granulate it; in addition, in order to achieve rapid cooling and improve the granulation effect, air and water can be mixed for impact, and air quenching treatment can be performed by combining air and water, including controlling and reducing the generation of rock wool by adjusting the pressure and flow of water and compressed air to improve the economic benefits of granulated phosphorus slag;

[0004] After searching, the prior art publication number is CN118186154A, which is a gas-water mixed horizontal slag granulation process and device; this scheme adopts a method of gas-liquid mixed impact slag granulation;

[0005] The prior art publication number is CN111979366A, which is a liquid steel slag air quenching granulation production line and its production process. This solution adopts the air quenching method for granulation. The present invention allows the compressed air source to directly act on the supersonic gas ejector in the granulator through the air pipeline, so that the airflow can perform a centralized air quenching granulation process on the liquid steel slag.

[0006] Although the combination of air quenching and water quenching can form a solution of atomization impact granulation combining air and water, scale will be generated when water quenching is added or used, thereby reducing the water flow rate and flow rate, thereby affecting the water quenching effect or the air and water mixing effect, and further affecting the granulation effect;

[0007] Therefore, the present invention provides a yellow phosphorus slag water quenching slag granulation system, which can be combined with water quenching and can also automatically clean up, thereby ensuring the granulation quality and avoiding the generation of rock wool. Summary of the invention

[0008] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a water-gas mixing automatic regulating yellow phosphorus slag water quenching slag granulation system. By combining an air supply system and a water supply system, a gas-water mixture is formed at a granulator and sprayed to impact the yellow phosphorus slag water, which can not only disperse and cool the yellow phosphorus slag, but also increase the cooling speed by wrapping the beads with mixed water, thereby ensuring the granulation quality and avoiding the generation of rock wool; further, the water tank can be cleaned of scale by a cleaning system to ensure the normal spraying of water.

[0009] In order to achieve the above object, the technical solution adopted by the present invention is:

[0010] A water-gas mixing automatic regulating yellow phosphorus slag water quenching slag granulation system comprises a water supply system, an air supply system, an ore-fired furnace and a granulator. The air supply system comprises an air compressor, a pressure tank and an air pipe. One end of the air pipe is connected to the granulator. The air compressor and the pressure tank are connected to each other through the air pipe. A one-way valve is provided between the pressure tank and the air compressor. An air pressure regulating system is provided between the granulator and the pressure tank. The water supply system comprises a sedimentation tank, a water pump, a vacuum pump and a water pressure regulating system, which are connected in sequence through a water pipe. A filter is provided between the sedimentation tank and the water pump. One end of the water supply system and the air supply system are connected to the granulator together. A cleaning system is provided between the water supply system and the air supply system. The ore-fired furnace is connected to a slag chute to drain slag water. The granulator is provided below the slag chute to impact the slag water for granulation. A granulation chamber is provided on one side of the granulator for collecting granules.

[0011] The air supply system and the water supply system cooperate to supply air and water to the granulator to form a water-air mixture, which is then sprayed by the granulator to quench and granulate the yellow phosphorus slag water flowing out of the slag chute.

[0012] The granulator comprises a box body, a nozzle is arranged on one side of the box body, a partition is arranged inside the box body to divide the box body into a water tank and an air cavity, a main air inlet pipe is arranged on one side of the box body in parallel with the air cavity, a main water inlet pipe is arranged on the top of the box body, and an auxiliary water inlet pipe is arranged on the main water inlet pipe and connected to the water tank; a guide plate is arranged in the air cavity to guide the air intake of the main air inlet pipe so that it is concentrated and blown to the nozzle; a nozzle is arranged in the box body, the nozzle is connected to the water tank and the air cavity, and one end of the nozzle is arranged in the nozzle for sleeve connection, so that the air-water mixture is sprayed out from the nozzle.

[0013] The water tank is provided with sewage outlets on both sides for cleaning and sewage discharge.

[0014] The main air intake pipe is provided with an auxiliary air intake pipe and is connected to the main water intake pipe to form a cleaning system; the main air intake pipe is connected to the air pipe in the air supply system; the water pipe in the water supply system is connected to the main water intake pipe.

[0015] The processing steps of the yellow phosphorus slag water quenching slag granulation system are as follows:

[0016] 1) Slag water discharge: The yellow phosphorus slag water in the submerged arc furnace is discharged through the slag chute, and then the water-gas mixture in the granulator impacts the yellow phosphorus slag water for quenching and granulation. The granulation chamber stores the granules. The solid particle size of the granules in the quenching granulator is 1-3mm; the smelting cycle of the submerged arc furnace is 3 hours, and the slag discharge is 45-55t each time; the slag guiding speed of the slag chute is 1-1.2t / min; the vertical distance between the granulator and the end of the slag chute is 0.5-1.5m; through the setting and adjustment of the box, ensure that the angle between the nozzle injection direction and the horizontal direction is 0-35°.

[0017] 2) High-pressure gas introduction: air is supplied by an air compressor, and a one-way valve controls the gas to enter the pressure tank. Then, the air pressure of the air pipe and the main air intake pipe is controlled by the air pressure regulating system. The compressed air pressure is controlled to be 0.2-0.4Mpa, and the air volume of the gas nozzle is adjusted to 10-35m³ / min. At the same time, the yellow phosphorus slag water is blown by the high-speed airflow mixed with water vapor to a vertical height of 10-15m, and the horizontal distance from the bottom of the slag chute after landing is 10-35m.

[0018] 3) Water introduction: The cooling water from the sedimentation tank is pumped through a water pump, then filtered through a filter and enters the vacuum pump, and then the water pressure is controlled by a water pressure regulating system, and then connected to the main water inlet pipe through a water pipe and enters the box, and then the water is sprayed through the nozzle through the air cavity to form a water-gas mixture with the high-pressure gas to impact the yellow phosphorus slag water; the water pressure is controlled to be 0.4-0.6Mpa.

[0019] 4) Cleaning of scale inside the box: After long-term operation, a large amount of scale will adhere to the inner wall of the water tank, which will affect the flow of water, so it is necessary to clean the scale. When cleaning, first close the main water inlet pipe, then open the auxiliary air inlet pipe and connect the auxiliary water inlet pipe to impact the water tank and the nozzle, and open the drain port to discharge the blown-off scale. The difference is that in the normal granulation process, the auxiliary air inlet pipe needs to be closed, and the main air inlet pipe, main water inlet pipe and auxiliary water inlet pipe need to be opened to enter the box to form an air-water mixture for impact granulation. This process is controlled by an externally set PLC automatic control system.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] By combining the air supply system and the water supply system, a mixture of air and water is formed at the granulator to spray and impact the yellow phosphorus slag water, which can not only disperse and cool it, but also increase the cooling speed by wrapping the beads with mixed water, ensure the granulation quality, and avoid the generation of rock wool; further, the water tank can be cleaned of scale by the cleaning system to ensure the normal spraying of water, ensure the mixing ratio of air and water, avoid the damage of the granulator due to steel slag and water quality, greatly improve the wind quenching effect of the granulator and reduce the risk of nozzle being blocked by scale, so as to ensure the smooth circulation of cooling water;

[0022] When cleaning, first close the main water inlet pipe to let water in, then open the auxiliary air inlet pipe and connect the auxiliary water inlet pipe to let air impact the water tank and the nozzle, and open the drain port to discharge the blown-off scale; the difference is that in the normal granulation process, it is necessary to close the auxiliary air inlet pipe, open the main air inlet pipe and the main water inlet pipe and the auxiliary water inlet pipe to enter the box to form an air-water mixture for the impact granulation process. This process can be realized by controlling the PLC automatic control system set by the external connection, which is simple and fast. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] AttachedFigure 1 This is a schematic diagram of the structure of a water-gas mixing automatic regulating yellow phosphorus slag water quenching slag granulation system of the present invention;

[0024] Attached Figure 2 It is a schematic diagram of the structure of the granulator;

[0025] Attached Figure 3 It is a schematic diagram of the box section structure;

[0026] Attached Figure 4 The internal structure of the granulator Figure 1 ;

[0027] Attached Figure 5 The internal structure of the granulator Figure 2 ;

[0028] Attached Figure 6 The internal structure of the granulator Figure 3 ;

[0029] In the figure: 1. Submerged arc furnace; 2. Slag chute; 3. Granulator; 4. Granulation chamber; 5. Sedimentation tank; 6. Filter; 7. Water pump; 8. Vacuum pump; 9. Water pressure regulating system; 10. Air compressor; 11. Check valve; 12. Pressure tank; 13. Air pressure regulating system; 14. Cleaning system; 15. Water pipe; 16. Air pipe;

[0030] 31. Box body; 311. Partition; 312. Nozzle; 313. Spray pipe; 314. Guide plate; 32. Water tank; 321. Sewage outlet; 33. Air cavity; 34. Main water inlet pipe; 341. Auxiliary water inlet pipe; 35. Main air inlet pipe; 351. Auxiliary air inlet pipe. DETAILED DESCRIPTION

[0031] To facilitate the understanding of those skilled in the art, Figure 1-6 , the technical solution of the present invention is further specifically described.

[0032] Embodiment 1:

[0033] A water-gas mixing automatic regulating yellow phosphorus slag water quenching slag granulation system comprises a water supply system, an air supply system, an ore-fired furnace 1, and a granulator 3. The air supply system comprises an air compressor 10, a pressure tank 12, and an air pipe 16. One end of the air pipe 16 is connected to the granulator 3. The air compressor 10 and the pressure tank 12 are connected to each other through the air pipe 16. A one-way valve 11 is provided between the pressure tank 12 and the air compressor 10. An air pressure regulating system 13 is provided between the granulator 3 and the pressure tank 12. The water supply system comprises a sedimentation tank 5, a water pump 7, a vacuum pump 8, and a water pressure regulating system 9, which are connected in sequence through a water pipe 15. A filter 6 is provided between the sedimentation tank 5 and the water pump 7. One end of the water supply system and the air supply system are connected to the granulator 3 together. A cleaning system 14 is provided between the water supply system and the air supply system. The ore-fired furnace 1 is connected to a slag chute 2 to extract slag water. The granulator 3 is provided below the slag chute 2 to impact the slag water for granulation. A granulation chamber 4 is provided on one side of the granulator 3 for collecting granules.

[0034] The air supply system and the water supply system cooperate to supply air and water to the granulator 3 to form a water-air mixture, which is then sprayed by the granulator 3 to quench and granulate the yellow phosphorus slag water flowing out of the slag chute 2.

[0035] The granulator 3 comprises a box body 31, a nozzle 312 is arranged on one side of the box body 31, a partition 311 is arranged inside the box body 31 to divide the box body 31 into a water tank 32 and an air cavity 33, a main air inlet pipe 35 is arranged on one side of the box body 31 and connected to the air cavity 33, a main water inlet pipe 34 is arranged on the top of the box body 31, and a secondary water inlet pipe 341 is arranged on the main water inlet pipe 34 and connected to the water tank 32; a guide plate 314 is arranged in the air cavity 33 to guide the air intake of the main air inlet pipe 35 so that it is concentrated and blown to the nozzle 312; a nozzle 313 is arranged in the box body 31, and the nozzle 313 is connected to the water tank 32 and the air cavity 33, and one end of the nozzle 313 is arranged in the nozzle 312 for sleeve connection, so that the air-water mixture is sprayed out from the nozzle 312.

[0036] The water tank 32 is provided with sewage outlets 321 on both sides for cleaning and sewage discharge.

[0037] The main air intake pipe 35 is provided with a secondary air intake pipe 351 and is connected to the main water intake pipe 34 to form a cleaning system; the main air intake pipe 35 is connected to the air pipe 16 in the air supply system; the water pipe 15 in the water supply system is connected to the main water intake pipe 34.

[0038] The processing steps of the yellow phosphorus slag water quenching slag granulation system are as follows:

[0039] 1) Slag water discharge: the yellow phosphorus slag water in the ore-fired furnace 1 is discharged through the slag chute 2, and then impacted by the water-gas mixture in the granulator 3 to quench the slag and granulate the yellow phosphorus slag. The granulation chamber 4 stores the granules. The solid particle size of the granules in the quenching granulator 3 is 1 mm. The smelting cycle of the ore-fired furnace 1 is 3 hours, and the slag is discharged 50 tons each time. The slag guiding speed of the slag chute 2 is 1 t / min. The vertical distance between the granulator 3 and the end of the slag chute 2 is 1 m. The box 31 is set and adjusted to ensure that the angle between the spray direction of the nozzle 312 and the horizontal direction is 25°.

[0040] 2) High-pressure gas introduction: air is supplied through the air compressor 10, and the one-way valve 11 controls the gas to enter the pressure tank 12, and then the air pressure regulating system 13 controls the air intake pressure of the air pipe 16 and the main air intake pipe 35, and the compressed air pressure is controlled to be 0.2Mpa, and the air volume of the gas nozzle is adjusted to 10m³ / min; at the same time, the yellow phosphorus slag water is blown by the high-speed airflow mixed with water vapor to a vertical height of 10m, and the horizontal distance from the bottom of the slag chute after landing is 25m.

[0041] 3) Water introduction: cooling water from the sedimentation tank 5 is extracted by the water pump 7, filtered by the filter 6 and then enters the vacuum pump 8, and then the water pressure is controlled by the water pressure regulating system 9, and then connected to the main water inlet pipe 34 through the water pipe 15 to enter the box 31, and then the water is sprayed by the nozzle 313 connected to the air cavity 33 to form a water-gas mixture with the high-pressure gas to impact the yellow phosphorus slag water; the water pressure is controlled to be 0.4Mpa.

[0042] 4) Cleaning scale inside the box: After long-term operation, a large amount of scale will adhere to the inner wall of the water tank, which will affect the flow of water, so it is necessary to clean the scale. When cleaning, first close the main water inlet pipe 34 for water inlet, then open the auxiliary air inlet pipe 351 and connect the auxiliary water inlet pipe 341 to intake air to impact the water tank 32 and the nozzle 313, and open the sewage outlet 321 to discharge the blown-off scale. The difference is that in the normal granulation process, it is necessary to close the auxiliary air inlet pipe 351, open the main air inlet pipe 35 and the main water inlet pipe 34 and the auxiliary water inlet pipe 341 to enter the box 31 to form an air-water mixture for impact granulation. This process is controlled by an externally set PLC automatic control system.

[0043] Embodiment 2:

[0044] The difference compared with Example 1 is:

[0045] 1) In the slag water discharge step: the solid particle size of the slag beads in the quenching slag granulator 3 is 2 mm; the slag discharge speed of the slag chute 2 is 1.1 t / min.

[0046] 2) In the high-pressure gas introduction step: air is supplied through the air compressor 10, the compressed air pressure is controlled to be 0.3 MPa, and the air volume of the gas nozzle is adjusted to 25 m³ / min.

[0047] 3) During the water introduction step: control the water pressure to 0.5Mpa.

[0048] Embodiment 3:

[0049] The difference compared with Example 2 is:

[0050] 1) In the slag water discharge step: the solid particle size of the slag beads in the quenching slag granulator 3 is 3 mm; the slag discharge speed of the slag chute 2 is 1.2 t / min.

[0051] 2) In the high-pressure gas introduction step: air is supplied through the air compressor 10, the compressed air pressure is controlled to be 0.4 MPa, and the air volume of the gas nozzle is adjusted to 35 m³ / min.

[0052] 3) During the water introduction step: control the water pressure to 0.6Mpa.

[0053] Test Example 1:

[0054] The difference compared with Example 1 is:

[0055] 1) In the slag water discharge step: the solid particle size of the beads in the quenching slag granulator 3 is 0.8 mm; the slag discharge speed of the slag chute 2 is 0.8 t / min.

[0056] 2) In the high-pressure gas introduction step: air is supplied through the air compressor 10, the compressed air pressure is controlled to be 0.18Mpa, and the air volume of the gas nozzle is adjusted to 8m³ / min.

[0057] 3) During the water introduction step: control the water pressure to 0.38Mpa.

[0058] Test Example 2:

[0059] The difference compared with Example 1 is:

[0060] 1) In the slag water discharge step: the solid particle size of the beads in the quenching slag granulator 3 is 3.5 mm; the slag discharge speed of the slag chute 2 is 1.28 t / min.

[0061] 2) In the high-pressure gas introduction step: air is supplied through the air compressor 10, the compressed air pressure is controlled to be 0.45 MPa, and the air volume of the gas nozzle is adjusted to 38 m³ / min.

[0062] 3) During the water introduction step: control the water pressure to 0.65Mpa.

[0063] Bead diameter mm Air pressureMpa Air volume m³ / min Water pressureMpa Rock wool (whether produced) Example 1 1 0.2 10 0.4 none Example 2 2 0.3 25 0.5 none Example 3 3 0.4 35 0.6 none Test Example 1 0.8 0.18 8 0.38 less Test Example 2 3.5 0.45 38 0.65 Large

[0064] According to the comparison of the above table data, it can be known that in Examples 1-3, when the water pressure is 0.4-0.6Mpa and the air pressure is 0.2-0.4Mpa, the particle size of the air-quenched beads is 1-3mm, and the air volume at this time is 10-35m³ / min, the air quenching can be carried out normally and qualified beads can be produced, which meets the air quenching requirements of yellow phosphorus slag;

[0065] In test examples 1-2, when the water pressure is less than 0.4Mpa and greater than 0.6Mpa, and the air pressure is less than 0.2Mpa and greater than 0.4Mpa, the diameter of the wind-quenched beads is less than 1mm or greater than 3mm, and the air volume is less than 10m³ / min and greater than 35m³ / min; although the beads can be wind-quenched, the diameter of the beads is larger or smaller, and unnecessary rock wool will be produced; therefore, when the water pressure is too large or too small, the wind pressure is too large or too small, and the wind speed is too large or too small, although wind quenching can be achieved within the above range, not only will the diameter of the beads be larger or smaller, resulting in unqualified results, but corresponding rock wool will also be produced, which does not meet the wind quenching requirements.

[0066] In the description of the present invention, unless otherwise specified, the terms "upper", "lower", "left", "right", "inside", "outside", "front end", "rear end", "head", "tail", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the present invention.

[0067] The above contents are merely examples and explanations of the structure of the present invention. The technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the invention or exceed the scope defined by the claims, they should all fall within the protection scope of the present invention.

Claims

1. A water-gas mixing automatic regulating yellow phosphorus slag water quenching slag granulation system, comprising a water supply system, a gas supply system, a submerged arc furnace, and a granulator, characterized in that The air supply system includes an air compressor, a pressure tank, and an air pipe. One end of the air pipe is connected to a granulator. The air compressor and the pressure tank are connected to each other through the air pipe. A one-way valve is provided between the pressure tank and the air compressor. An air pressure regulating system is provided between the granulator and the pressure tank. The water supply system includes a sedimentation tank, a water pump, a vacuum pump, and a water pressure regulating system, which are connected in sequence through a water pipe. A filter is provided between the sedimentation tank and the water pump. One end of the water supply system and the air supply system are connected to the granulator together. A cleaning system is provided between the water supply system and the air supply system. The ore-fired furnace is connected to a slag chute to output slag water. The granulator is provided under the slag chute to impact the slag water for granulation. A granulation chamber is provided on one side of the granulator for collecting granules. The air supply system and the water supply system cooperate to supply air and water to the granulator to form a water-gas mixture, which is then sprayed by the granulator to quench the yellow phosphorus slag water flowing out of the slag chute for slag granulation. The granulator comprises a box body, a nozzle is arranged on one side of the box body, a partition is arranged inside the box body to divide the box body into a water tank and an air cavity, a main air inlet pipe is arranged on one side of the box body in parallel with the air cavity, a main water inlet pipe is arranged on the top of the box body, and an auxiliary water inlet pipe is arranged on the main water inlet pipe and connected to the water tank; a guide plate is arranged in the air cavity to guide the air intake of the main air inlet pipe so that it is concentrated and blown to the nozzle; a nozzle is arranged in the box body, the nozzle is connected to the water tank and the air cavity, and one end of the nozzle is arranged in the nozzle for sleeve connection, so that the air-water mixture is sprayed out from the nozzle.

2. The water-gas mixing automatic regulating yellow phosphorus slag water quenching slag granulation system according to claim 1 is characterized in that The water tank is provided with sewage outlets on both sides for cleaning and sewage discharge.

3. The water-gas mixing automatic regulating yellow phosphorus slag water quenching slag granulation system according to claim 1 is characterized in that The main air intake pipe is provided with an auxiliary air intake pipe and is connected to the main water intake pipe to form a cleaning system; the main air intake pipe is connected to the air pipe in the air supply system; the water pipe in the water supply system is connected to the main water intake pipe.

4. The water-gas mixing automatic regulating yellow phosphorus slag water quenching slag granulation system according to claim 1 is characterized in that The processing steps of the yellow phosphorus slag water quenching slag granulation system are as follows: 1) Slag water extraction: The yellow phosphorus slag water in the submerged arc furnace is discharged through the slag chute, and then the water and gas mixture in the granulator impacts the yellow phosphorus slag water for quenching and granulation. The granulation chamber stores the granules. The solid particle size of the granules in the quenching granulator is 1-3mm. The smelting cycle of the submerged arc furnace is 3 hours, and the slag is discharged 45-55t each time. The slag guiding speed of the slag chute is 1-1.2t / min. 2) High-pressure gas introduction: The air is supplied by the air compressor, and the one-way valve controls the gas to enter the pressure tank. Then the air pressure of the air pipe and the main air intake pipe is controlled by the air pressure regulating system. The compressed air pressure is controlled to 0.2-0.4Mpa, and the air volume of the gas nozzle is adjusted to 10-35m³ / min; 3) Water introduction: The cooling water from the sedimentation tank is pumped by a water pump, filtered by a filter and then enters the vacuum pump, and then the water pressure is controlled by the water pressure regulating system, and then the water pipe is connected to the main water inlet pipe to enter the box, and then the water is sprayed by the nozzle through the air cavity to form a water-gas mixture with the high-pressure gas to impact the yellow phosphorus slag water; the water pressure is controlled to be 0.4-0.6Mpa; 4) Cleaning scale inside the box: After long-term operation, a large amount of scale will adhere to the inner wall of the water tank, which will affect the flow of water, so it is necessary to clean the scale. When cleaning, first close the main water inlet pipe, then open the auxiliary air inlet pipe and connect the auxiliary water inlet pipe to impact the water tank and the nozzle, and open the drain port to discharge the blown-off scale. The difference is that in the normal granulation process, it is necessary to close the auxiliary air inlet pipe, open the main air inlet pipe and the main and auxiliary water inlet pipes to enter the box to form an air-water mixture for the impact granulation process.

5. The water-gas mixing automatic regulating yellow phosphorus slag water quenching slag granulation system according to claim 4 is characterized in that Step 1) The vertical distance between the granulator and the end of the slag chute is 0.5-1.5m; through the setting and adjustment of the box, ensure that the angle between the nozzle injection direction and the horizontal direction is 0-35°.

6. The water-gas mixing automatic regulating yellow phosphorus slag water quenching slag granulation system according to claim 4, characterized in that In step 2), the yellow phosphorus slag water is simultaneously blown by the high-speed airflow mixed with water vapor to a vertical height of 10-15m, and the horizontal distance from the bottom of the slag chute after landing is 10-35m.

7. The water-gas mixing automatic regulating yellow phosphorus slag water quenching slag granulation system according to claim 4 is characterized in that Step 2) Control the compressed air pressure to 0.3Mpa and adjust the air volume of the gas nozzle to 25m³ / min.

8. The water-gas mixing automatic regulating yellow phosphorus slag water quenching slag granulation system according to claim 4, characterized in that In step 2), the water pressure is controlled to be 0.5 MPa.

9. The water-gas mixing automatic regulating yellow phosphorus slag water quenching slag granulation system according to claim 4, characterized in that In step 1), the smelting cycle of the electric arc furnace is 3 hours, and the slag discharge is 50 tons each time; the slag guiding speed of the slag chute is 1.1 t / min.

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