Steel slag treatment equipment

Abstract

The utility model relates to steel slag treatment equipment which comprises a machine table, a powder spraying tank, a connecting pipe, a rotary spraying gun, a rotary control device and a steel ladle. The powder spraying tank is arranged on the machine table and used for spraying reducing agent powder; the steel ladle is provided with a cavity used for containing steel slag. The rotary spray gun is arranged on the machine table; the rotary spray gun can rotate around the axis; the discharge end of the rotary spray gun is arranged in the cavity; the discharging end of the powder spraying tank is connected to the feeding end of the rotary spraying gun through a connecting pipe and used for spraying reducing agent powder into the cavity. The rotation control device is arranged on the rack and connected to the rotary spray gun so as to control rotation of the rotary spray gun. The steel slag treatment equipment can be used for recycling the steel slag, and the recovery rate of molten metal in the steel slag and the recycling rate of the steel slag can be increased.

Description

Technical Field

[0001] This application relates to the field of steel slag recycling technology, and in particular to a steel slag treatment device. Background Technology

[0002] Converter slag contains P2O5, which is harmful to the properties of steel, making direct recycling difficult. Some of the CaO and MgO in steel slag are combined with other components, while some exist in a free state, causing them to expand in volume when exposed to air. Therefore, steel slag must be processed before use in building materials, and its usage is limited. Existing technologies for steel slag recycling, considering its characteristics, mainly include hot quenching, hot pouring, and drum treatment. After crushing and magnetic separation, the iron-rich portion of the steel slag is returned to steelmaking, the tailings are re-sintered, and the remainder is used in cement, roadbeds, or landfill. Steel slag contains large amounts of metallic Fe, as well as FeO, CaO, MgO, Al2O3, etc. However, traditional steel slag treatment methods have low recovery rates of molten steel and low recycling rates. Utility Model Content

[0003] Therefore, it is necessary to provide a steel slag treatment device. The steel slag treatment device of this application can be used to recycle steel slag, thereby improving the recovery rate of molten steel in the steel slag and the recycling rate of the steel slag.

[0004] This application provides a steel slag treatment device, including a machine base, a powder spraying tank, a connecting pipe, a rotary spray gun, a rotary control device, and a steel ladle;

[0005] The powder spraying can is mounted on the machine base, and the powder spraying can is used to spray reducing agent powder.

[0006] The ladle has a cavity for receiving steel slag;

[0007] The rotary spray gun is mounted on the machine base; the rotary spray gun is rotatable around its axis; the discharge end of the rotary spray gun is located inside the cavity; the discharge end of the powder spraying tank is connected to the feed end of the rotary spray gun through the connecting pipe, for spraying the reducing agent powder into the cavity; the rotation control device is mounted on the machine base and connected to the rotary spray gun to control the rotation of the rotary spray gun.

[0008] In some embodiments, the rotary spray gun includes a powder spraying pipe, a support pipe, and a heat insulation pipe nested from the inside out; the discharge end of the powder spraying tank is connected to the feed end of the powder spraying pipe through the connecting pipe; the rotation control device is connected to the support pipe; the rotary spray gun also includes a blade, which is disposed on the periphery of the heat insulation pipe and close to the bottom of the ladle.

[0009] In some embodiments, the steel slag treatment equipment further includes a lifting control device, which is mounted on the machine platform; the lifting control device is connected to the rotary spray gun and is used to control the height of the rotary spray gun within the cavity.

[0010] In some embodiments, the steel slag treatment equipment further includes a fixed pulley and a traction component. The fixed pulley is disposed on the machine platform, and one end of the traction component is connected to the lifting control device, while the other end passes through the fixed pulley and is connected to the rotary spray gun. The traction component is used to pull the rotary spray gun to adjust the setting height of the rotary spray gun within the cavity.

[0011] In some embodiments, the steel slag treatment equipment further includes a rotary joint and a coupling; one end of the coupling is connected to the rotary joint, and the other end is connected to the rotary spray gun; the discharge end of the connecting pipe is connected to the rotary joint.

[0012] In some embodiments, the steel slag processing equipment further includes a dust removal device disposed on the machine platform; the ladle has an opening for feeding, and the dust removal device is disposed toward the opening.

[0013] In some embodiments, the length of the blade along the axial direction of the rotating spray gun is 200mm to 800mm.

[0014] In some embodiments, the length of the blade along the radial direction of the rotating spray gun is 200mm to 800mm.

[0015] In some embodiments, the ladle has a steel outlet located at the bottom of the ladle.

[0016] In some embodiments, the ladle further includes a sealing device for closing the outlet.

[0017] The aforementioned steel slag treatment equipment can be used for the recycling of steel slag. During operation, the hot steel slag to be treated is added to the cavity of the ladle, ensuring the slag submerges the discharge end of the rotary spray gun. After adding the slag, reducing agent powder is sprayed through the rotary spray gun, exiting into the slag. Simultaneously, the rotation of the spray gun mixes the reducing agent powder and the slag, causing a reduction reaction that generates molten steel. Under the combined action of spraying and stirring, the molten steel in the slag and the reacted molten steel converge. Due to the gravitational difference between the molten steel and the slag, the molten steel sinks to the bottom of the cavity, achieving a good separation between the molten steel and the slag. Furthermore, during the reduction reaction, the CO gas generated continues to mix with the slag as it rises, further reacting with the upper layer of slag and increasing the utilization rate. The steel slag treatment equipment of this application can effectively utilize the physical heat of hot steel slag during use, achieving good mixing and reduction effects through injection and rotary stirring. This allows for the substantial reduction of FeO in the steel slag and the reduction of P2O5 into the molten steel, resulting in a good purification effect on the steel slag. Furthermore, the steel slag treatment equipment of this application can be used for the recycling of steel slag, improving the recovery rate of molten steel from the slag and the overall recycling rate of the steel slag. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a steel slag treatment device provided in one embodiment of this application;

[0019] Figure 2 This is a partial structural diagram of a rotary spray gun provided in one embodiment of this application.

[0020] Explanation of reference numerals in the attached figures

[0021] 1. Powder spraying tank; 2. Connecting pipe; 3. Rotary joint; 4. Coupling; 5. Rotary spray gun; 51. Blade; 52. Powder spraying pipe; 53. Support pipe; 54. Heat insulation pipe; 6. Rotation control device; 7. Lifting control device; 8. Fixed pulley; 9. Traction component; 10. Dust removal device; 11. Steel ladle; 12. Steel outlet; 13. Sealing device; 14. Steel slag; 15. Molten steel; 16. Machine base. Detailed Implementation

[0022] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, a detailed description of specific embodiments of this application is provided below. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0024] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0025] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0026] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0027] Reference Figure 1As shown, one embodiment of this application provides a steel slag treatment device, including a machine base 16, a powder spraying tank 1, a connecting pipe 2, a rotary spray gun 5, a rotation control device 6, and a ladle 11. The powder spraying tank 1 is mounted on the machine base 16 and is used to spray reducing agent powder. The ladle 11 has a cavity for receiving steel slag. The rotary spray gun 5 is mounted on the machine base 16. The rotary spray gun 5 is rotatable about its axis. The discharge end of the rotary spray gun 5 is located within the cavity. The discharge end of the powder spraying tank 1 is connected to the feed end of the rotary spray gun 5 via the connecting pipe 2, and is used to spray reducing agent powder into the cavity. The rotation control device 6 is mounted on the machine base 16 and connected to the rotary spray gun 5 to control the rotation of the rotary spray gun 5.

[0028] The aforementioned steel slag treatment equipment can be used for the recycling of steel slag. During operation, the hot steel slag to be treated is added to the cavity of the ladle 11, ensuring the slag submerges the discharge end of the rotary spray gun 5. After adding the slag, reducing agent powder is sprayed through the rotary spray gun 5, exiting into the slag through its discharge end. Simultaneously, the rotation of the spray gun 5 mixes the reducing agent powder and the slag, causing a reduction reaction that generates molten steel. Under the combined action of spraying and stirring, the molten steel in the slag and the reacted molten steel converge. Due to the gravitational difference between the molten steel and the slag, the molten steel sinks to the bottom of the cavity, achieving a good separation between them. Furthermore, during the reduction reaction, the CO gas generated continues to mix with the slag as it rises, further reacting with the upper layer of slag and increasing the utilization rate. The steel slag treatment equipment of this application can effectively utilize the physical heat of hot steel slag during use, achieving good mixing and reduction effects through injection and rotary stirring. This allows for the substantial reduction of FeO in the steel slag and the reduction of P2O5 into the molten steel, resulting in a good purification effect on the steel slag. Furthermore, the steel slag treatment equipment of this application can be used for the recycling of steel slag, improving the recovery rate of molten steel from the slag and the overall recycling rate of the steel slag.

[0029] It is understandable that hot steel slag refers to steel slag with a certain temperature.

[0030] Reference Figure 2 As shown, in some embodiments, the rotary spray gun 5 includes a powder spraying pipe 52, a support pipe 53, and a heat insulation pipe 54, which are nested from the inside out. The discharge end of the powder spraying tank 1 is connected to the feed end of the powder spraying pipe 52 via a connecting pipe 2. The rotation control device 6 is connected to the support pipe 53. The rotary spray gun 5 also includes a blade 51, which is disposed on the periphery of the heat insulation pipe 54 and near the bottom of the ladle 11.

[0031] In the rotary spray gun 5, the outermost heat insulation pipe 54 is used to provide heat insulation protection for the inner powder spraying pipe 52 and support pipe 53. The support pipe 53 is connected to the rotation control device 6 to control the rotary spray gun 5 to rotate around its axis. In use, the hot steel slag to be treated can be added into the cavity of the ladle 11, and the steel slag can be used to bury the blades 51 of the rotary spray gun 5. At the same time, the rotation of the rotary spray gun 5 causes the blades 51 to stir the steel slag, which can improve the mixing effect between the reducing agent powder and the steel slag.

[0032] In some embodiments, the steel slag treatment equipment further includes a lifting control device 7, which is mounted on the machine base 16. The lifting control device 7 is connected to the rotary spray gun 5 and is used to control the installation height of the rotary spray gun 5 within the cavity.

[0033] The lifting control device 7 can control the setting height of the rotating spray gun 5 in the cavity, so that the initial position of the rotating spray gun 5 is close to the bottom wall of the cavity, so that the reducing agent powder and steel slag have a better mixing effect.

[0034] In some embodiments, the steel slag treatment equipment further includes a fixed pulley 8 and a traction component 9. The fixed pulley 8 is mounted on the machine base 16, and one end of the traction component 9 is connected to the lifting control device 7, while the other end passes through the fixed pulley 8 and is connected to the rotary spray gun 5. The traction component 9 is used to pull the rotary spray gun 5 to adjust its height within the cavity.

[0035] In some embodiments, the steel slag treatment equipment further includes a rotary joint 3 and a coupling 4. One end of the coupling 4 is connected to the rotary joint 3, and the other end is connected to the rotary spray gun 5. The discharge end of the connecting pipe 2 is connected to the rotary joint 3.

[0036] In some embodiments, the steel slag processing equipment further includes a dust removal device 10, which is mounted on the machine base 16. The ladle 11 has an opening for feeding, and the dust removal device 10 is positioned toward the opening.

[0037] Because the reducing agent powder is sprayed into the cavity through the powder spraying pipe 52, a relatively large amount of dust is generated. The dust generated can be collected by the dust collection device 10 installed through the opening facing the ladle 11.

[0038] In some embodiments, the length of the blade 51 along the axial direction of the rotating spray gun 5 is 200mm to 800mm.

[0039] Optionally, the length of the blade 51 along the axial direction of the rotating spray gun 5 is 200mm, 250mm, 300mm, 350mm, 400mm, 450mm, 500mm, 550mm, 600mm, 650mm, 700mm, 750mm or 800mm, or the length of the blade 51 along the axial direction of the rotating spray gun 5 can be within any two of the above lengths.

[0040] In some embodiments, the length of the blade 51 along the radial direction of the rotating spray gun 5 is 200mm to 800mm.

[0041] Optionally, the radial length of the blade 51 along the rotary spray gun 5 is 200mm, 250mm, 300mm, 350mm, 400mm, 450mm, 500mm, 550mm, 600mm, 650mm, 700mm, 750mm or 800mm, or the radial length of the blade 51 along the rotary spray gun 5 can be within any two of the above lengths.

[0042] In some embodiments, the ladle 11 has a steel outlet 12 located at the bottom of the ladle 11. The ladle 11 also includes a sealing device 13 for closing the steel outlet 12.

[0043] Due to the gravitational difference between the molten steel and the slag, the molten steel will sink to the bottom of the cavity. The outlet 12 is located at the bottom of the ladle 11, and the sealing device 13 is used to close the outlet 12, which allows the molten steel to flow out from the outlet 12 after each slag treatment.

[0044] Another embodiment of this application provides a steel slag treatment method, which uses the steel slag treatment equipment described above to treat steel slag, and includes the following steps:

[0045] The hot steel slag to be processed is added into the cavity of the ladle 11 and the steel slag is submerged at the discharge end of the rotary spray gun 5.

[0046] The reducing agent powder is sprayed out from the discharge end of the rotary spray gun 5 through the powder spraying tank 1. At the same time, the rotary spray gun 5 is controlled to rotate through the rotation control device 6. The rotation of the rotary spray gun 5 mixes the reducing agent powder with the hot steel slag, thereby reducing the hot steel slag.

[0047] Hot steel slag to be treated is added to the cavity of the ladle 11, ensuring the slag submerges the discharge end of the rotary spray gun 5. After adding the slag, reducing agent powder is sprayed through the rotary spray gun 5, exiting into the slag through its discharge end. Simultaneously, the rotation of the spray gun 5 causes the blades 51 to agitate the slag, mixing the reducing agent powder and the slag, allowing the slag to generate molten steel under the action of the reduction reaction. Under the combined action of spraying and agitation, the molten steel in the slag and the molten steel generated by the reaction converge. Due to the gravity difference between the molten steel and the slag, the molten steel sinks to the bottom of the cavity, achieving a good separation effect between the molten steel and the slag. Furthermore, during the reduction reaction, the CO gas generated continues to mix with the slag as it rises, further reacting with the upper layer of slag, increasing the effective utilization rate. The steel slag treatment method of this application can effectively utilize the physical heat of hot steel slag, achieving good mixing and reduction effects through injection and rotary stirring. This allows for the substantial reduction of FeO in the steel slag and the reduction of P2O5 into the molten steel, resulting in a good purification effect on the steel slag. This steel slag treatment method can improve the recovery rate of molten steel from steel slag and the recycling rate of steel slag.

[0048] In some embodiments, the reducing agent powder includes at least one of pulverized coal, coke powder, carbon powder, and ferrosilicon powder.

[0049] For example, the reducing agent powder can react with FeO in steel slag as follows:

[0050] FeO + C = Fe + CO, or 2FeO + Si = 2Fe + SiO2.

[0051] In some embodiments, the initial distance between the discharge end of the rotary spray gun 5 and the bottom wall of the cavity is set to 300mm~500mm.

[0052] Optionally, the initial distance between the discharge end of the rotary spray gun 5 and the bottom wall of the cavity can be set to 300mm, 320mm, 340mm, 360mm, 380mm, 400mm, 420mm, 440mm, 460mm, 480mm or 500mm, or the initial distance between the discharge end of the rotary spray gun 5 and the bottom wall of the cavity can be set within any two of the above distances.

[0053] In some embodiments, the rotational speed of the rotary spray gun 5 is 20 r / min to 150 r / min.

[0054] Within the aforementioned rotational speed range of the rotary spray gun 5, the mixing and reduction effect between the reducing agent powder and the steel slag is better. Optionally, the rotational speed of the rotary spray gun 5 is 20 r / min, 30 r / min, 50 r / min, 80 r / min, 100 r / min, 120 r / min, 140 r / min, or 150 r / min, or the rotational speed of the rotary spray gun 5 can also be within the range between any two of the above rotational speeds.

[0055] In some embodiments, the rate of introduction of the reducing agent powder is 20 kg / min to 50 kg / min.

[0056] Within the range of the aforementioned reducing agent powder introduction rate, a better mixed reduction between the reducing agent powder and steel slag can be achieved, thereby improving the recovery rate of molten steel from the steel slag and the recycling rate of the steel slag. Optionally, the reducing agent powder introduction rate can be 20 kg / min, 25 kg / min, 30 kg / min, 35 kg / min, 40 kg / min, 45 kg / min, or 50 kg / min, or the reducing agent powder introduction rate can be within any two of the above-mentioned introduction rates.

[0057] In some embodiments, the reducing agent powder is introduced into the cavity via a carrier gas at a flow rate of 20 Nm³. 3 / h~80Nm 3 / h.

[0058] Optionally, the carrier gas flow rate is 20 Nm³. 3 / h, 25Nm 3 / h, 30Nm 3 / h, 35Nm 3 / h, 40Nm 3 / h, 45Nm 3 / h, 50Nm 3 / h、55Nm 3 / h、60Nm 3 / h、65Nm 3 / h, 70Nm 3 / h、75Nm 3 / h or 80Nm 3 / h, or the carrier gas flow rate can be within the range of any two of the above flow rates.

[0059] In some of these embodiments, the carrier gas includes nitrogen.

[0060] In some embodiments, the powder spraying pressure of the powder spraying tank 1 is 0.3MPa~0.5MPa.

[0061] By applying a certain pressure to spray the reducing agent powder into the cavity and mix it with the steel slag, a better mixing and reduction effect between the reducing agent powder and the steel slag can be achieved, which can improve the recovery rate of molten steel in the steel slag and the recycling rate of the steel slag. Optionally, the powder spraying pressure of the powder spraying tank 1 is 0.3MPa, 0.32MPa, 0.34MPa, 0.36MPa, 0.38MPa, 0.4MPa, 0.42MPa, 0.44MPa, 0.46MPa, 0.48MPa or 0.5MPa, or the powder spraying pressure of the powder spraying tank 1 can be within any two of the above pressure ranges.

[0062] In some implementations, the following steps are also included:

[0063] After each reduction process is completed, the sealing device 13 is opened, allowing the molten steel obtained from the reduction of the hot steel slag to flow out of the outlet 12.

[0064] Add the hot steel slag to be treated into the cavity again;

[0065] Each time hot steel slag to be treated is added into the cavity, the distance between the discharge end of the rotary spray gun 5 and the bottom wall of the cavity is increased by 500mm to 1000mm by the lifting control device 7.

[0066] Understandably, after the molten steel is discharged after one reaction, the sealing device 13 can be closed when slag appears at the tap 12, leaving treated slag inside the cavity. After adding more slag to be treated into the cavity, the distance between the discharge end of the rotary spray gun 5 and the bottom wall of the cavity can be increased by 500mm to 1000mm using the lifting control device 7. This allows the reducing agent powder to be sprayed closer to the untreated slag, achieving a better treatment effect.

[0067] Optionally, after each addition of hot steel slag to be treated into the cavity, the distance between the discharge end of the rotary spray gun 5 and the bottom wall of the cavity is increased by 500mm, 600mm, 700mm, 800mm, 900mm or 1000mm by the lifting control device 7. Alternatively, the distance between the discharge end of the rotary spray gun 5 and the bottom wall of the cavity can be increased by the lifting control device 7 within any two of the above distances after each addition of hot steel slag to be treated into the cavity.

[0068] The following are specific embodiments.

[0069] Example 1

[0070] Production conditions: The 210t converter corresponds to a ladle with an inner diameter of 3.8m and a height of 3.5m, which holds about 80t of hot steel slag. The slag is discharged 5 times in succession. After each discharge of molten steel, about 2 / 3 of the steel slag is poured out. When the converter is splashed to protect the furnace (the remaining steel slag after splashing is not poured out and the next heat is directly charged and smelted), the ladle is transported to the rotary injection treatment station to start the injection of carbon powder for reduction.

[0071] Production parameters: Powder spraying tank pressure 0.48MPa, N2 flow rate 50Nm³. 3 The reducing agent powder is introduced at a rate of 45 kg / h, with each spray lasting 15 minutes. The rotary spray gun is initially inserted 500 mm from the bottom wall of cavity 11 of the ladle, increasing by 400 mm each time, with a rotation speed of 80 r / min.

[0072] Production Results: After the fifth treatment, the sealing device was opened, and 15 tons of molten steel were released. Testing revealed that the FeO content in the steel slag decreased from 25% to 5%, and the P2O5 content decreased from 1.2% to 0.11%.

[0073] The steel slag treatment equipment and method of this application can recycle steel slag, improve the recovery rate of molten steel in steel slag and the recycling rate of steel slag.

[0074] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0075] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims, and the specification and drawings can be used to interpret the content of the claims.

Claims

1. A steel slag treatment device, characterized in that, Includes machine base, powder spraying tank, connecting pipe, rotary spray gun, rotary control device and steel ladle; The powder spraying can is mounted on the machine base, and the powder spraying can is used to spray reducing agent powder. The ladle has a cavity for receiving steel slag; The rotary spray gun is mounted on the machine base; the rotary spray gun is rotatable around its axis; the discharge end of the rotary spray gun is located inside the cavity; the discharge end of the powder spraying tank is connected to the feed end of the rotary spray gun through the connecting pipe, for spraying the reducing agent powder into the cavity; the rotation control device is mounted on the machine base and connected to the rotary spray gun to control the rotation of the rotary spray gun.

2. The steel slag treatment equipment according to claim 1, characterized in that, The rotary spray gun includes a powder spraying pipe, a support pipe, and a heat insulation pipe nested from the inside out; the discharge end of the powder spraying tank is connected to the feed end of the powder spraying pipe through the connecting pipe; the rotation control device is connected to the support pipe; the rotary spray gun also includes a blade, which is disposed on the periphery of the heat insulation pipe and close to the bottom of the ladle.

3. The steel slag treatment equipment according to claim 1, characterized in that, The steel slag treatment equipment also includes a lifting control device, which is installed on the machine platform; the lifting control device is connected to the rotary spray gun, and is used to control the installation height of the rotary spray gun in the cavity.

4. The steel slag treatment equipment according to claim 3, characterized in that, The steel slag treatment equipment also includes a fixed pulley and a traction component. The fixed pulley is set on the machine platform, and one end of the traction component is connected to the lifting control device, while the other end passes through the fixed pulley and is connected to the rotary spray gun. The traction component is used to pull the rotary spray gun to adjust the setting height of the rotary spray gun in the cavity.

5. The steel slag treatment equipment according to claim 1, characterized in that, The steel slag treatment equipment also includes a rotary joint and a coupling; one end of the coupling is connected to the rotary joint, and the other end is connected to the rotary spray gun; the discharge end of the connecting pipe is connected to the rotary joint.

6. The steel slag treatment equipment according to claim 1, characterized in that, The steel slag processing equipment also includes a dust removal device, which is installed on the machine platform; the steel ladle has an opening for feeding, and the dust removal device is positioned facing the opening.

7. The steel slag treatment equipment according to claim 2, characterized in that, The length of the blade along the axial direction of the rotating spray gun is 200mm to 800mm.

8. The steel slag treatment equipment according to claim 2, characterized in that, The length of the blade along the radial direction of the rotating spray gun is 200mm to 800mm.

9. The steel slag treatment equipment according to any one of claims 1 to 8, characterized in that, The ladle has a steel outlet located at the bottom of the ladle.

10. The steel slag treatment equipment according to claim 9, characterized in that, The ladle also includes a sealing device for sealing the outlet.

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