A slag air-quenching and pulverizing device and its use method

Abstract

The present invention provides a slag air-quenching and pulverizing device and a method for using the same, which relates to the technical field of heat treatment and equipment, and includes a vortex tube, a first air supply pipeline, a second air supply pipeline, a roller and a power device; the roller is divided into an inner cylinder and an outer cylinder, the outer cylinder rotates around the inner cylinder, and the power device provides power for the rotation of the outer cylinder; the peripheral wall of the inner cylinder is provided with nozzles; the present invention uses compressed air, or nitrogen, or carbon dioxide as a working medium, and utilizes the vortex tube to generate two airflows of hot air and cold air. Among them, the hot air generates a jet airflow through the nozzles to impact the slag; at the same time, the rotational movement of the outer cylinder is used to strike the slag. The present invention can accelerate the cooling and fragmentation of the slag and enhance the dispersion effect of the slag; moreover, the cold air separated by the vortex tube is used to cool the rotating parts of the machine, improving the reliability of the equipment.

Description

Technical Field

[0001] The present invention relates to the technical field of heat treatment and equipment, and particularly relates to a molten slag air quenching and pulverizing device and a using method thereof. Background Art

[0002] In the smelting process, raw materials need to be repeatedly smelted, and the smelting furnace slag (molten slag) is discharged from the slag outlet. The water quenching, crushing and separation of the molten slag are important links in the smelting process.

[0003] Currently, the main process for producing nickel matte from nickel ore is as follows: nickel ore is first smelted to produce low nickel matte, and then the low nickel matte is blown to produce nickel matte; in addition, the crushed laterite nickel ore is mixed with a reducing agent to form pellets, and a self-reduced product is obtained under a protective atmosphere. The self-reduced product is selectively oxidized in a weakly oxidizing atmosphere to obtain an oxidized product. After the oxidized product is melted and separated, the metal and gangue are separated to obtain a high-grade nickel-iron alloy; this method is for producing high-grade nickel-iron alloy products with a nickel content of 30%.

[0004] In the smelting process, generally, raw materials need to be repeatedly smelted to continuously enrich and obtain high-grade nickel-iron alloy; the smelting furnace slag (molten slag) is discharged from the slag outlet, and the water quenching, crushing and separation of the molten slag have to go through multiple times; the smelting furnace slag after repeated depletion is called tail slag, which can be incorporated into cement as a blending material.

[0005] Currently, the commonly used water quenching methods are slag pond water quenching and in-front-of-furnace water quenching. The water quenching process is prone to waste of water resources. Moreover, during the water quenching of molten slag, blasting often occurs due to improper control of technical conditions such as the tapping temperature and water supply ratio. The so-called blasting refers to the explosion caused by the steam expansion under high temperature and high pressure, which may cause material splashing loss and water quenching water overflow at the lightest, and equipment and facility damage or even personal injury accidents at the heaviest.

[0006] To overcome the above drawbacks, in the prior art:

[0007] Chinese Patent CN118048492A discloses a blast furnace molten slag water jet granulation collaborative steam waste heat power generation device and process. The high-temperature molten slag from the blast furnace is filtered and then enters the granulation slag tank through the slag trench and is split by the molten slag water nozzle. Then, under the action of the water jet nozzle array, the molten slag is broken by the water jet and cooled into fine particles with a temperature of about 300°C and a particle size less than 8 mm. This device can reduce the consumption of granulation water and take into account the waste heat recovery and power generation on the basis of the recycling of blast furnace slag material resources.

[0008] Chinese patent CN118028549A discloses a high-temperature liquid slag wind quenching granulation and waste heat efficient recovery system, which stores liquid slag in a slag bag, installs it on a tilting device through hoisting, and the slag enters the intermediate buffer device, and then is blown into particles by high-pressure airflow ejected from a high-pressure air nozzle at the outlet of the chute, and then enters the water-cooled granulation bin, and exchanges heat with the air and water-cooled wall in the granulation bin. The system recovers high-grade sensible heat from liquid slag and realizes efficient recovery of slag waste heat resources.

[0009] Chinese patent CN220977028U discloses a wheel-crushing self-spinning tube slag mist quenching reactor, which includes a granulating wheel, a slag chute, a self-spinning tube cooler, a water mist space and an atomizing nozzle. The device has a simple structure, is easy to implement and operate, can process iron-containing slag, has strong anti-adhesion ability and good safety.

[0010] In the process of implementing the embodiments of the present invention, the inventors found that the prior art has at least the following defects: the slag dispersion effect is poor. The poor slag dispersion effect causes the slag particles to have different sizes, which is not conducive to the subsequent crushing and sorting processes; it also causes the slag latent heat recovery efficiency to decrease, which in turn causes heat loss and leads to energy waste. Summary of the invention

[0011] The object of the present invention is to provide a slag air quenching and crushing device and a method of using the same, which can solve the technical problem of poor slag dispersion effect in the prior art and improve heat recovery efficiency.

[0012] To achieve the above object, the present invention is implemented through the following technical solutions:

[0013] A slag air quenching and crushing device comprises a vortex tube, a first air supply pipeline, a second air supply pipeline and a roller; wherein:

[0014] The roller is divided into an inner cylinder and an outer cylinder, the inner cylinder is fixedly arranged and coaxially nested in the outer cylinder, and the outer cylinder is hollow and rotates around the inner cylinder;

[0015] The inner cylinder is connected to the hot air outlet end of the vortex tube through the first air supply pipeline; the peripheral wall of the inner cylinder is provided with a nozzle that changes from coarse to fine;

[0016] The outer cylinder is connected to the second air supply pipeline through a hollow shaft and a rotary joint, and the other end of the second air supply pipeline is connected to the cold air outlet end of the vortex tube; and,

[0017] The hollow shaft is rotatably connected to the bearing seat, and the slag air quenching and crushing device is connected to the equipment frame or foundation through the bearing seat; the hollow shaft is connected to the power device through the transmission assembly, and the power device provides power for the rotation of the outer cylinder;

[0018] The present invention utilizes the rotational movement of the outer cylinder to strike the slag, and uses compressed air to generate two airflows of hot air and cold air through the vortex tube to complete slag scouring and granulation; the cold air passes through the internal space of the hollow shaft to cool the hollow shaft and the bearing housing.

[0019] Further: The outer cylinder is a circular sieve cylinder woven from metal wire.

[0020] Further: The outer cylinder includes an end cover and a rear cover, which are connected by several connecting pieces between the end cover and the rear cover, and are circumferentially evenly distributed; the connecting pieces are angle steel, or round steel, or hollow steel pipes.

[0021] Further: The connecting piece is a hollow steel pipe, and the hollow steel pipe is communicated with the hollow shaft, and cold air circulates inside the part to reduce the temperature of the device.

[0022] Further: The power device is a motor; the transmission methods of the transmission assembly include belt pulley transmission or gear transmission.

[0023] The present invention also provides a use method of the slag air-quenching and crushing device according to the above, a chute is set, so that the slag slides down by gravity and falls to the side of the roller, and the rotating outer cylinder impacts the slag from bottom to top; the rotational movement of the outer cylinder is used to strike the slag, and the faster the rotation speed, the greater the striking force; the outer cylinder is hollowed out and rotates around the inner cylinder, and can timely scrape off the slag adhering to the outer surface of the inner cylinder;

[0024] The power device provides power for the rotation of the outer cylinder, and the power device is a motor; the hollow shaft drives the outer cylinder to rotate around the inner cylinder along its own axis, and the rotation speed of the outer cylinder is adjusted as needed; the speed regulation methods include: adjusting the rotation speed of the motor, or adjusting the transmission ratio of the transmission assembly;

[0025] Compressed air is used to pass through the vortex tube to generate vortex to separate two airflows of cold and hot; hot air and cold air are generated, and the hot air is led to the inner cylinder, wherein the compressed air comes from an air storage tank and / or an air compressor; the peripheral wall of the inner cylinder is provided with a nozzle that gradually becomes thinner on the side of the material dropping point, and the air flow is ejected from the inside to the outside to impact the slag, and the slag directly faces the compressed air, undergoes rapid cooling, generates internal stress, and can accelerate the cooling and fragmentation of the slag;

[0026] In the present invention, the slag is subjected to mechanical impact and internal stress caused by temperature difference. Under the superposition of two different acting forces, the slag cools, shrinks, and fractures, thus enhancing the dispersion effect of the slag. Moreover, the hollow shaft is connected to the cold air outlet end of the eddy current tube through the rotary joint, and cold air passes through the internal space of the hollow shaft to cool the hollow shaft and the bearing housing, improving the working environment and enhancing the reliability of the equipment.

[0027] After slag flushing and granulation are completed, the slag particles are collected by subsequent equipment and enter the next process section. The next process section refers to the further cooling, conveying, sorting, grading, and storage of the slag particles, and partial or all of them can be selected according to needs.

[0028] Furthermore: a manual valve is installed on the air inlet pipeline and closed during maintenance to disconnect the air flow supply for convenient maintenance; and / or, a control valve is equipped at the gas outlet end of the eddy current tube, or a ball valve or a cock valve is installed on the pipeline to adjust the flow rate and temperature of the cold and hot air flows for convenient production.

[0029] Furthermore: the nozzle gradually becomes thinner from thick and then expands outward in a flared shape at the end. By leveraging the Laval effect, the slag flushing effect is enhanced; and / or, nitrogen or carbon dioxide is used as the working medium. Nitrogen and carbon dioxide are inert gases with better safety performance.

[0030] Furthermore: the connecting piece of the outer cylinder is replaced with a hollow steel pipe, and each hollow steel pipe is communicated with the hollow shaft; it is used to circulate cold air inside the parts of the outer cylinder, which can further reduce the working temperature of the device.

[0031] Furthermore: an atomizing nozzle is added. Water and gas required for production are led to the atomizing nozzle, and water mist is generated by the atomizing nozzle to wash the slag particles formed after the slag fractures in the slag particle splashing area, which is beneficial to safe production; by precisely controlling the water addition amount, the residual heat of the slag particles can dry themselves, improving the production environment and saving water.

[0032] Compared with the prior art, the present invention has the following beneficial effects:

[0033] 1. The present invention provides power for the rotation of the outer cylinder through the power device; the hollow shaft drives the outer cylinder to rotate around the inner cylinder along its own axis; the slag is struck by the rotational movement of the outer cylinder, and the faster the rotation speed, the greater the striking force. The rotation speed of the outer cylinder can be adjusted as needed; the peripheral wall of the inner cylinder is provided with a nozzle that gradually becomes thinner on the side of the material dropping point, and the air flow is ejected from the inside to the outside, impacting the slag. The slag directly faces the compressed air, undergoes rapid cooling, generates internal stress, and can accelerate the cooling and fragmentation of the slag; in summary, in the present invention, the slag has to bear the internal stress caused by mechanical impact and a large temperature difference. Under the superposition of the two different acting forces, the slag cools, shrinks, and fragments; in short, the present invention utilizes thermal expansion and contraction to generate internal stress and applies an external force, which can enhance the dispersion effect of the slag and achieve the invention purpose.

[0034] 2. The hollow shaft is connected to the cold air outlet end of the vortex tube through the rotary joint, and the cold air passes through the internal space of the hollow shaft to cool the hollow shaft and the bearing seat; that is to say, the present invention utilizes the cold air separated by the vortex tube to cool the rotating parts of the machine, improves the working environment, and enhances the reliability of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a layout schematic diagram of a slag air-quenching and pulverizing device in an embodiment of the invention;

[0036] Figure 2 It is a cross-sectional view of a roller in an embodiment of the present invention;

[0037] Figure 3 It is a left view of the outer cylinder in another embodiment of the present invention;

[0038] Figure 4 It is a right view of the outer cylinder in another embodiment of the present invention;

[0039] Figure 5 It is a layout schematic diagram of a slag air-quenching and pulverizing device in another embodiment of the present invention;

[0040] In the figure:

[0041] 1. Vortex tube; 21. First air supply pipeline; 22. Second air supply pipeline; 3. Roller; 31. Inner cylinder; 311. Nozzle; 32. Outer cylinder; 321. Hollow shaft; 322. Bearing seat; 4. Rotary joint; 5. Power device; 51. Transmission component; 6. Atomizing nozzle; 7. Water tank; 8. Atomizing air storage tank. DETAILED DESCRIPTION OF THE INVENTION

[0042] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative work shall fall within the protection scope of the present invention.

[0043] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It 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 should not be construed as a limitation to the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0044] Embodiment 1

[0045] Refer to Figure 1 and Figure 2 This embodiment provides a slag air-quenching and pulverizing device, which includes a vortex tube 1, a first air supply pipeline 21, a second air supply pipeline 22, and a roller 3. Among them, the function of the vortex tube 1 is to generate a vortex from compressed air to separate cold and hot air streams.

[0046] The roller 3 includes an inner cylinder 31 and an outer cylinder 32, and the material of the roller 3 is selected as heat-resistant steel.

[0047] The inner cylinder 31 of the roller 3 is connected to the hot air outlet end of the vortex tube 1 through the first air supply pipeline 21. The air supply pipelines (including the first air supply pipeline 21 and the second air supply pipeline 22) are all made of seamless steel pipes.

[0048] The inner cylinder 31 is a cylindrical, hollow closed cylinder with a wall thickness of 10 mm, fixedly arranged, and coaxially nested in the outer cylinder 32. The circumferential wall of the inner cylinder 31 is provided with a nozzle 311 that gradually becomes thinner on the side of the material dropping point, and the air flow sprays out from the inside to the outside. When other parameter values are certain, the internal stress value of the slag is proportional to the quenching speed, that is, when the slag is quenched, the greater the quenching speed, the greater the internal stress value generated. In the present invention, the compressed air directly faces the slag, and through rapid cooling, internal stress is generated, which can accelerate the cooling and granulation of the slag.

[0049] The outer cylinder 32 is hollowed out and can rotate around the inner cylinder 31 to timely scrape off the slag adhering to the outer surface of the inner cylinder 31. The outer cylinder 32 can be made of metal wire weaving, or made of angle steel or round steel. The outer cylinder 32 needs to be wear-resistant treated, and the treatment method includes coating with wear-resistant materials. As an easily worn part, it is convenient to replace.

[0050] Refer to Figure 2 , this embodiment provides a manufacturing method of the outer cylinder 32: the outer cylinder 32 includes an end cover and a rear cover. Among them, the end cover is a hollow flange similar to a donut, with a thickness of 12 mm; several angle steels are used to connect between the end cover and the rear cover, and the connection method is welding, and the angle steels are circumferentially evenly distributed.

[0051] With the aid of the conical rear cover, the outer cylinder 32 is sequentially connected to the second air supply pipeline 22 through the hollow shaft 321 and the rotary joint 4, and the other side of the second air supply pipeline 22 is connected to the cold air outlet end of the vortex tube 1.

[0052] The hollow shaft 321 is rotatably connected to the bearing seat 322 and is connected to the device frame or foundation through the bearing seat 322; and, the hollow shaft 321 is connected to the power device 5 through the transmission assembly 51, and the power device 5 provides power for the rotation of the outer cylinder 32.

[0053] Refer to Figure 2 , this embodiment also discloses a use method of the slag air-quenching and pulverizing device, including setting a chute to allow the slag to slide down by gravity and fall onto the side of the roller 3, and the rotating outer cylinder 32 impacts the slag from bottom to top; in this way, the rotation movement of the outer cylinder 32 is used to strike the slag, and the faster the rotation speed, the greater the striking force; that is to say, through the power provided by the power device 5 (motor), the hollow shaft 321 drives the outer cylinder 32 to rotate around the inner cylinder 31 along its own axis, and the rotation speed of the outer cylinder 32 can be adjusted as needed;

[0054] The method for adjusting the rotation speed of the outer cylinder 32 includes:

[0055] (1) When a reduction motor is selected, the rotation speed of the outer cylinder 32 can be adjusted by adjusting the rotation speed of the motor;

[0056] (2) The transmission methods of the transmission assembly 51 include belt pulley transmission or gear transmission;

[0057] At the same time, compressed air is used to pass through the vortex tube 1 to generate hot air and cold air; among them, the compressed air comes from the air storage tank and / or the air compressor. Optionally, a manual valve is installed on the air inlet pipeline, and the air flow supply can be disconnected during maintenance to facilitate maintenance.

[0058] The hot air is led to the inner cylinder 31. The inner cylinder 31 is made of rolled steel plates, and a nozzle 311 that becomes thinner from thick is provided on the peripheral wall of the inner cylinder 31.

[0059] Refer to Figure 2, in this embodiment, the nozzle 311 is located in the first quadrant area of the cross-section of the inner cylinder 31; hot air is ejected from the nozzle 311, and the hot air is used to wash the molten slag. The temperature of the molten slag is usually above 1000 degrees Celsius, while the temperature of the hot air can be controlled at dozens of degrees. It is called "hot" air just for the convenience of understanding and there are some differences in the description. In the present invention, the molten slag has to bear the internal stress and mechanical impact brought by a huge temperature difference. Under the superposition of two different acting forces, the molten slag cools, shrinks, and breaks. Therefore, this method can enhance the dispersion effect of the molten slag and achieve the object of the invention.

[0060] Further, the nozzle 311 tapers from thick to thin and then expands outward in a flared shape at the end, similar to a Laval nozzle. In this embodiment, the nozzle 311 utilizes the Laval effect to enhance the slag flushing effect.

[0061] After the slag flushing and granulation are completed, the fine particles of the molten slag are collected by subsequent equipment and can then enter the next process section, including further cooling, conveying, sorting, grading, and storage, etc.

[0062] Normally, a control valve is equipped at the gas outlet end of the vortex tube 1. Through the control valve, the flow rates and temperatures of the hot and cold airflows can be adjusted; according to the law of conservation of energy, when one increases the other decreases. While adjusting the temperature, the gas flow rate is also adjusted; if the vortex tube 1 is not equipped with a control valve, it can be made by oneself, or a ball valve or a cock valve can be installed on the pipeline, and the same effect can be achieved.

[0063] Additionally, the hollow shaft 321 is connected to the cold air outlet end of the vortex tube 1 through the rotary joint 4. The cold air passes through the internal space of the hollow shaft 321 and is used to cool the hollow shaft 321 and the bearing seat 322, improving the working environment and enhancing the reliability of the equipment.

[0064] In addition, nitrogen or carbon dioxide can also be used as the working medium. Nitrogen and carbon dioxide are inert gases and have better safety performance.

[0065] Embodiment 2

[0066] Based on Embodiment 1, the difference in this embodiment is that

[0067] (1) Refer to Figure 3 and Figure 4 , further, the angle steel (or round steel) of the outer cylinder 32 is replaced with a hollow steel pipe, and each hollow steel pipe is communicated with the hollow shaft 321; in this way, cold air circulates inside the parts of the outer cylinder 32, which can reduce the working temperature of the device.

[0068] (2) Refer to Figure 5, Further, an atomizing nozzle 6 is additionally provided.

[0069] The atomizing nozzle 6 is a series of nozzles for atomization, which are divided into high-pressure atomizing nozzles, low-pressure atomizing nozzles, and air atomizing nozzles, and are widely used in occasions such as spray humidification, spray dust suppression, spray lubrication, spraying and marking, and spraying mold release agents. In this embodiment, by providing a water tank 7 and an atomizing gas storage tank 8, the required water and gas are led to the atomizing nozzle 6, and the atomizing nozzle 6 is used to generate water mist to wash the slag particles formed after the molten slag breaks in the slag particle splashing area. That is to say, during normal production, large pieces of molten slag cannot contact the water mist, only the broken slag particles can contact the water mist; moreover, the slag particles contact atomized water droplets, not a body of water gathered together, and the body of water refers to water in a pool; in this way, the steam generated by heat exchange can be discharged in time, and the steam can be used to heat the working medium for waste heat power generation; thus, the phenomenon of blasting can be eliminated, which is beneficial to safe production. At the same time, by precisely controlling the water addition amount, the residual heat of the slag particles can dry themselves, which can improve the environment and save water.

[0070] This embodiment further cools down by using phase change, which is a cooling method that releases or absorbs heat through the phase change of a substance; during the phase change of a substance, due to the change in the state of molecules, a large amount of heat will be generated or absorbed, thereby changing the temperature of the surrounding environment; taking evaporation as an example, during the process of liquid converting into gas, liquid molecules need to absorb a large amount of heat from the surrounding environment to overcome their surface tension in order to break away from the surface; therefore, the process of water evaporation can quickly absorb the heat of the slag particles and promote the disintegration of the slag particles.

[0071] The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose is to enable those who are familiar with this technology to understand the content of the present invention and implement it accordingly, and it cannot be used to limit the protection scope of the present invention. Any equivalent transformation or modification made according to the spirit and essence of the present invention should be covered within the protection scope of the present invention.

Claims

1. A slag air-quenching and pulverizing device, characterized in that, It includes a vortex tube (1), a first air supply pipeline (21), a second air supply pipeline (22) and a roller (3); wherein, The roller (3) is divided into an inner cylinder (31) and an outer cylinder (32). The inner cylinder (31) is fixedly arranged and coaxially nested in the outer cylinder (32). The outer cylinder (32) is hollowed out and rotates around the inner cylinder (31); The inner cylinder (31) is communicated with the hot air outlet end of the vortex tube (1) through the first air supply pipeline (21); a nozzle (311) that gradually becomes thinner from thick is provided on the peripheral wall of the inner cylinder (31); The outer cylinder (32) is connected to the second air supply pipeline (22) through a hollow shaft (321) and a rotary joint (4). The other end of the second air supply pipeline (22) is connected to the cold air outlet end of the vortex tube (1); and, The hollow shaft (321) is rotatably connected to a bearing seat (322). Through the bearing seat (322), the slag air quenching and crushing device is connected to the equipment frame or foundation; the hollow shaft (321) is connected to a power device (5) through a transmission component (51), and the power device (5) provides power for the rotation of the outer cylinder (32).

2. The slag air-quenching and pulverizing device according to claim 1, wherein, The outer cylinder (32) is a circular sieve cylinder and is woven by metal wires.

3. The slag air-quenching and pulverizing device according to claim 1, characterized in that, The outer cylinder (32) includes an end cover and a rear cover, which are connected by several connecting pieces between the end cover and the rear cover and are circumferentially evenly distributed; the connecting pieces are angle steels, or round steels, or hollow steel pipes.

4. The slag air-quenching and pulverizing device according to claim 3, characterized in that, The connecting piece is a hollow steel pipe, and the hollow steel pipe is communicated with the hollow shaft (321) to allow cold air to flow inside the part and reduce the device temperature.

5. A slag air-quenching and pulverizing device according to claim 4, characterized in that The power device (5) is a motor; the transmission method of the transmission component (51) includes belt pulley transmission or gear transmission.

6. A method for using the slag air-quenching and pulverizing device according to claim 5, characterized in that, A chute is provided to allow the slag to slide down by gravity and fall to the side of the roller (3). The rotating outer cylinder (32) impacts the slag from bottom to top; the rotating movement of the outer cylinder (32) is used to strike the slag; the outer cylinder (32) is hollowed out and rotates around the inner cylinder (31); Power is provided for the rotation of the outer cylinder (32) through the power device (5), and the power device (5) is a motor; the hollow shaft (321) drives the outer cylinder (32) to rotate around the inner cylinder (31) along its own axis, and the rotation speed of the outer cylinder (32) is adjusted as required; the speed regulation method includes: adjusting the rotation speed of the motor, or adjusting the transmission ratio of the transmission component (51); Compressed air is passed through the vortex tube (1) to direct the hot air to the inner cylinder (31). Among them, the compressed air comes from an air storage tank and / or an air compressor; a nozzle (311) that gradually becomes thinner from thick is provided on the peripheral wall of the inner cylinder (31) on the side of the material dropping point. The air flow sprays out from inside to outside, impacts the slag, and the slag directly faces the compressed air, undergoes rapid cooling, generates internal stress, and can accelerate the cooling and fragmentation of the slag; After slag scouring and granulation are completed, the slag particles are collected by subsequent equipment and enter the next process section. The next process section refers to the further cooling, conveying, sorting, grading and storage of the slag particles, and part or all of them are selected as required.

7. The method of using a slag air-quenching and pulverizing device according to claim 6, characterized in that, Install a manual valve on the intake pipeline and close the manual valve during maintenance; and / or, equip a control valve at the gas outlet end of the vortex tube (1), or install a ball valve or a cock valve on the pipeline to adjust the flow rate and temperature of the cold and hot airflows.

8. A method for using a slag air-quenching and pulverizing device according to claim 6, characterized in that, Use nitrogen or carbon dioxide as the working medium.

9. The method of using a slag air-quenching and pulverizing device according to claim 6, characterized in that, The connecting piece of the outer cylinder (32) is a hollow steel pipe, and each hollow steel pipe is communicated with the hollow shaft (321).

10. The usage method of a slag air-quenching and pulverizing device according to claim 6, characterized in that, Add an atomizing nozzle (6), introduce the water and gas required for production to the atomizing nozzle (6), and use the atomizing nozzle (6) to generate water mist to wash the slag particles formed after the molten slag breaks in the slag particle splashing area; by precisely controlling the water addition amount, dry the residual heat of the slag particles by themselves.

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