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, a steel ladle and an induction coil. The powder spraying tank is arranged on the machine table. The steel ladle is provided with a cavity used for containing steel slag. And the induction coil is wound on the outer wall of the steel ladle. The rotary spray gun is arranged on the machine table. The rotary spray gun can rotate around the axis thereof. And 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 rotary control device is arranged on the machine table 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, and can improve the recovery rate of molten steel in steel slag and the recycling rate of 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, a steel ladle, and an induction coil;

[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; the induction coil is wound around the outer wall of the ladle and is used to heat the steel slag in the cavity;

[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 ladle has a steel outlet located at the bottom of the ladle; the ladle also includes a sealing device for closing the steel outlet.

[0011] In some embodiments, the steel slag treatment equipment further includes a reversing device; the reversing device is movably disposed on the discharge side of the steel outlet for receiving the material discharged from the steel outlet; the reversing device includes a first conveying channel and a second conveying channel with different conveying directions.

[0012] In some embodiments, the steel slag treatment equipment further includes a molten steel collection device; the molten steel collection device is disposed on the discharge side of the first material conveying channel, and the molten steel collection device is used to collect the molten steel discharged from the first material conveying channel.

[0013] In some embodiments, the steel slag treatment equipment further includes a chute, a blower, and a slag collection chamber;

[0014] The chute is located on the discharge side of the second material conveying channel and is used to receive the steel slag discharged from the second material conveying channel.

[0015] The air outlet of the blowing device is arranged facing the discharge side of the slide, and is used to air quench the steel slag discharged through the slide.

[0016] The slag collection chamber is used to receive steel slag that has been air-quenched by the blowing device.

[0017] 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.

[0018] In some embodiments, the length of the blade along the axial direction of the rotating spray gun is 200mm to 800mm.

[0019] In some embodiments, the length of the blade along the radial direction of the rotating spray gun is 200mm to 800mm.

[0020] 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 a ladle, ensuring the slag submerges the discharge end of the rotary spray gun. After the slag is added, an induction coil heats the slag within the cavity. If the slag contains unmelted solid metal, it will melt under electromagnetic induction; if it does not contain unmelted solid metal, the iron in the slag will also slowly heat up under electromagnetic induction, thus increasing the slag's fluidity and improving the mixing effect between the reducing agent powder and the slag. The reducing agent powder is then sprayed through the rotary spray gun, exiting through the discharge end into the slag. Simultaneously, the rotation of the spray gun mixes the reducing agent powder and the slag, causing the slag to react and produce molten steel. Under the combined action of injection and stirring, the molten steel in the steel slag and the molten steel produced by the reaction converge. Due to the gravitational difference between the molten steel and the steel slag, the molten steel sinks to the bottom of the chamber, achieving a good separation effect between the molten steel and the steel slag. Simultaneously, during the reduction reaction, the CO gas generated continues to mix with the steel slag as it rises, and further reacts with the upper layer of steel slag, increasing the effective utilization rate. The steel slag treatment equipment 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 large-scale 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. The steel slag treatment equipment of this application can be used for the recycling of steel slag, improving the recovery rate of molten steel in the steel slag and the recycling rate of the steel slag. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of a steel slag treatment device provided in one embodiment of this application;

[0022] Figure 2 This is a partial structural diagram of a rotary spray gun provided in one embodiment of this application.

[0023] Explanation of reference numerals in the attached figures

[0024] 1. Lifting control device; 2. Rotation control device; 3. Powder spraying tank; 4. Rotary spray gun; 41. Blade; 42. Powder spraying pipe; 43. Support pipe; 44. Heat insulation pipe; 5. Ladle; 6. Induction coil; 7. Steel slag; 8. Molten steel; 9. Steel outlet; 10. Sealing device; 11. Commutator; 12. Dust removal device; 13. Molten steel collection device; 14. Slide rail; 15. Blowing device; 16. Air-quenched steel slag; 17. Slag collection chamber; 18. Machine platform. Detailed Implementation

[0025] 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.

[0026] 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.

[0027] 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.

[0028] 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.

[0029] 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.

[0030] Reference Figure 1 , Figure 2 As shown, one embodiment of this application provides a steel slag processing device, including a machine base 18, a powder spraying tank 3, a connecting pipe, a rotary spray gun 4, a rotation control device 2, a ladle 5, and an induction coil 6. The powder spraying tank 3 is mounted on the machine base 18 and is used to spray reducing agent powder. The ladle 5 has a cavity for receiving steel slag. The induction coil 6 is wound around the outer wall of the ladle 5 and is used to heat the steel slag inside the cavity. The rotary spray gun 4 is mounted on the machine base 18. The rotary spray gun 4 is rotatable about its axis. The discharge end of the rotary spray gun 4 is located inside the cavity. The discharge end of the powder spraying tank 3 is connected to the feed end of the rotary spray gun 4 via a connecting pipe, and is used to spray reducing agent powder into the cavity. The rotation control device 2 is mounted on the machine base 18 and connected to the rotary spray gun 4 to control the rotation of the rotary spray gun 4.

[0031] 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 5, ensuring the slag submerges the discharge end of the rotary spray gun 4. After the slag is added, the slag inside the cavity is heated by the induction coil 6. If the slag contains unmelted solid metal, it will melt under electromagnetic induction. If there is no unmelted solid metal, the iron in the slag will also slowly heat up under electromagnetic induction, thereby increasing the fluidity of the slag and enhancing the mixing effect between the reducing agent powder and the slag. The reducing agent powder is then sprayed through the rotary spray gun 4, exiting through the discharge end of the spray gun 4 into the slag. Simultaneously, the rotation of the spray gun 4 mixes the reducing agent powder and the slag, causing the slag to react and generate molten steel. Under the combined action of injection and stirring, the molten steel in the steel slag and the molten steel produced by the reaction converge. Due to the gravitational difference between the molten steel and the steel slag, the molten steel sinks to the bottom of the chamber, achieving a good separation effect between the molten steel and the steel slag. Simultaneously, during the reduction reaction, the CO gas generated continues to mix with the steel slag as it rises, and further reacts with the upper layer of steel slag, increasing the effective utilization rate. The steel slag treatment equipment 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 large-scale 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. The steel slag treatment equipment of this application can be used for the recycling of steel slag, improving the recovery rate of molten steel in the steel slag and the recycling rate of the steel slag.

[0032] It is understandable that hot steel slag refers to steel slag with a certain temperature.

[0033] In some embodiments, the rotary spray gun 4 includes a powder spraying pipe 42, a support pipe 43, and a heat insulation pipe 44, which are nested from the inside out; the discharge end of the powder spraying tank 3 is connected to the feed end of the powder spraying pipe 42 via a connecting pipe; and the rotation control device 2 is connected to the support pipe 43. The rotary spray gun 4 also includes a blade 41, which is disposed around the heat insulation pipe 44 and close to the bottom of the ladle 5.

[0034] In the rotary spray gun 4, the outermost heat insulation pipe 44 is used to provide heat insulation protection for the inner powder spraying pipe 42 and support pipe 43. The support pipe 43 is connected to the rotation control device 2 to control the rotation of the rotary spray gun 4 around its axis. In use, the hot steel slag to be treated can be added into the cavity of the ladle 5, and the steel slag can be used to submerge the blades 41 of the rotary spray gun 4. At the same time, the rotation of the rotary spray gun 4 causes the blades 41 to stir the steel slag, which can improve the mixing effect between the reducing agent powder and the steel slag.

[0035] In some embodiments, the steel slag treatment equipment also includes a lifting control device 1, which is mounted on the machine base 18 and is used to control the height of the rotating spray gun 4 within the cavity.

[0036] The lifting control device 1 can control the setting height of the rotating spray gun 4 in the cavity, so that the initial position of the rotating spray gun 4 is close to the bottom wall of the cavity, so that the reducing agent powder and steel slag have a better mixing effect.

[0037] In some embodiments, the ladle 5 has a steel outlet 9 located at the bottom of the ladle 5. The ladle 5 also includes a sealing device 10 for closing the steel outlet 9.

[0038] 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 9 is located at the bottom of the ladle 5, and the sealing device 10 is used to close the outlet 9, which allows the molten steel to flow out from the outlet 9 after each slag treatment is completed.

[0039] In some embodiments, the steel slag processing equipment further includes a reversing device 11. The reversing device 11 is movably disposed on the discharge side of the steel outlet 9 to receive the material discharged from the steel outlet 9. The reversing device 11 includes a first conveying channel and a second conveying channel with different conveying directions.

[0040] Since the molten steel settles at the bottom of the cavity, when the vent device is opened, the molten steel first flows out from the outlet 9. The molten steel can be transferred through the first conveying channel. When the molten steel in the cavity is discharged and the slag is discharged from the outlet 9, the reversing device 11 can be moved to transfer the slag discharged from the outlet 9 through the second conveying channel, thereby achieving the separation of molten steel and slag.

[0041] In some embodiments, the steel slag treatment equipment further includes a molten steel collection device 13. The molten steel collection device 13 is disposed on the discharge side of the first conveying channel and is used to collect the molten steel discharged from the first conveying channel.

[0042] In some embodiments, the steel slag processing equipment further includes a chute 14, an air blowing device 15, and a slag collection chamber 17. The chute 14 is located on the discharge side of the second conveying channel and is used to receive the steel slag discharged from the second conveying channel. The air outlet of the air blowing device 15 is positioned facing the discharge side of the chute 14 and is used to air-quench the steel slag discharged through the chute 14. The slag collection chamber 17 is used to receive the steel slag that has been air-quenched by the air blowing device 15.

[0043] It is understandable that air quenching refers to the method of blowing and breaking steel slag into particles by high-pressure air when it flows out. The steel slag discharged from the second conveying channel is transferred to the air outlet of the blowing device 15 through the chute 14 for air quenching. The air-quenched steel slag can be collected in the slag collection chamber 17, which facilitates the recycling of the steel slag.

[0044] In some embodiments, the steel slag processing equipment also includes a dust removal device 12, which is mounted on the machine base 18; the ladle 5 has an opening for feeding, and the dust removal device 12 is positioned toward the opening.

[0045] Because the reducing agent powder is sprayed into the cavity through the powder spraying pipe 42, a large amount of dust is generated. The dust generated can be collected by the dust collection device 12 installed through the opening facing the ladle 5.

[0046] In some embodiments, the length of the blade 41 along the axial direction of the rotating spray gun 4 is 200mm to 800mm.

[0047] Optionally, the length of the blade 41 along the axial direction of the rotating spray gun 4 is 200mm, 250mm, 300mm, 350mm, 400mm, 450mm, 500mm, 550mm, 600mm, 650mm, 700mm, 750mm or 800mm, or the length of the blade 41 along the axial direction of the rotating spray gun 4 can be within any two of the above lengths.

[0048] In some embodiments, the length of the blade 41 along the radial direction of the rotating spray gun 4 is 200mm to 800mm.

[0049] Optionally, the radial length of the blade 41 along the rotating spray gun 4 is 200mm, 250mm, 300mm, 350mm, 400mm, 450mm, 500mm, 550mm, 600mm, 650mm, 700mm, 750mm or 800mm, or the radial length of the blade 41 along the rotating spray gun 4 can be within any two of the above lengths.

[0050] 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:

[0051] The hot steel slag to be processed is added into the cavity of the ladle 5 and the steel slag is submerged at the discharge end of the rotary spray gun 4.

[0052] The steel slag inside the cavity is heated by induction coil 6, causing the solid metal in the hot steel slag to melt.

[0053] The reducing agent powder is sprayed out from the discharge end of the rotary spray gun 4 through the powder spraying tank 3. At the same time, the rotary spray gun 4 is controlled to rotate through the rotation control device 2. The rotation of the rotary spray gun 4 mixes the reducing agent powder with the hot steel slag, thereby reducing the hot steel slag.

[0054] The hot steel slag to be treated is added into the cavity of the ladle 5, ensuring the slag completely covers the discharge end of the rotary spray gun 4. After the slag is added, the slag inside the cavity is heated by the induction coil 6. If the slag contains unmelted solid metal, it will melt under electromagnetic induction. If the slag does not contain unmelted solid metal, the iron in the slag will also slowly heat up under electromagnetic induction, thereby increasing the fluidity of the slag and improving the mixing effect between the reducing agent powder and the slag. The reducing agent powder is then sprayed through the rotary spray gun 4, exiting through the discharge end of the rotary spray gun 4 into the slag. Simultaneously, the rotation of the rotary spray gun 4 mixes the reducing agent powder and the slag, causing the slag to generate molten steel under the action of reduction. Under the combined action of injection and stirring, the molten steel in the steel slag and the molten steel produced by the reaction converge. Due to the gravitational difference between the molten steel and the steel slag, the molten steel sinks to the bottom of the chamber, achieving a good separation effect between the molten steel and the steel slag. Simultaneously, during the reduction reaction, the CO gas generated continues to mix with the steel slag as it rises, and further reacts with the upper layer of steel slag, increasing the effective utilization rate. The steel slag treatment method of this application effectively utilizes the physical heat of hot steel slag, achieving good mixing and reduction effects through injection and rotary stirring. This allows for the large-scale 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. The steel slag treatment method of this application can improve the recovery rate of molten steel in steel slag and the recycling rate of steel slag.

[0055] In some embodiments, the reducing agent powder includes at least one of pulverized coal, coke powder, carbon powder, and ferrosilicon powder.

[0056] For example, the reducing agent powder can react with FeO in steel slag as follows:

[0057] FeO + C = Fe + CO, or 2FeO + Si = 2Fe + SiO2.

[0058] In some embodiments, the initial distance between the discharge end of the rotary spray gun 4 and the bottom wall of the cavity is set to 300mm~500mm.

[0059] Optionally, the initial distance between the discharge end of the rotary spray gun 4 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 4 and the bottom wall of the cavity can be set within any two of the above distances.

[0060] In some embodiments, the rotational speed of the rotary spray gun 4 is 20 r / min to 150 r / min.

[0061] Within the range of rotational speed of the rotary spray gun 4, 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 4 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 45 can also be within the range between any two of the above rotational speeds.

[0062] In some embodiments, the power of the induction coil 6 is 500 kWh / t to 1000 kWh / t.

[0063] In some embodiments, the heat treatment time is 10 min to 30 min.

[0064] Within the range of power and heating time of the induction coil 6 described above, the induction coil 6 achieves good heating effect on the steel slag in the cavity. Optionally, the power of the induction coil 6 is 500 kWh / t, 600 kWh / t, 700 kWh / t, 800 kWh / t, 900 kWh / t, or 1000 kWh / t, or the power of the induction coil 6 can also be within the range of any two of the above power values. Optionally, the heating time is 10 min, 12 min, 14 min, 16 min, 18 min, 20 min, 22 min, 24 min, 26 min, 28 min, or 30 min, or the heating time can also be within the range of any two of the above time values.

[0065] In some embodiments, the reducing agent powder is introduced into the cavity via a carrier gas at a flow rate of 40 Nm³. 3 / h~100Nm 3 / h.

[0066] Optionally, the carrier gas flow rate is 40 Nm³. 3 / h, 50Nm 3 / h、60Nm 3 / h, 70Nm 3 / h, 80Nm 3 / h、90Nm 3 / h or 100Nm 3 / h, or the carrier gas flow rate can be within the range of any two of the above flow rates.

[0067] In some embodiments, the powder spraying pressure of the powder spraying tank 3 is 0.4 MPa to 0.8 MPa.

[0068] Optionally, the powder spraying pressure of the powder spraying tank 3 is 0.4MPa, 0.5MPa, 0.6MPa, 0.7MPa or 0.8MPa, or the powder spraying pressure of the powder spraying tank 3 can be within the range of any two of the above pressures.

[0069] In some embodiments, the reduction treatment of hot steel slag further includes the following steps:

[0070] Open the sealing device 10 to allow the molten steel obtained from reduction to flow out of the ladle 5;

[0071] Molten steel is transferred through the first material conveying channel.

[0072] In some embodiments, after the molten steel is transferred through the first conveying channel, the following steps are also included:

[0073] When steel slag is discharged from the steel outlet 9, the reversing device 11 is moved to transfer the steel slag through the second material conveying channel;

[0074] The steel slag discharged from the second conveyor is received by the chute 14;

[0075] The steel slag discharged from the discharge side of the slide 14 is air-quenched by the blowing device 15;

[0076] The air-quenched steel slag is collected through the slag collection chamber 17.

[0077] By using a converter 11 that includes a first material conveying channel and a second material conveying channel with different material conveying directions, molten steel and slag can be transferred and collected through the first material conveying channel and the second material conveying channel respectively, which facilitates the separation of molten steel and slag.

[0078] In some embodiments, the outlet air pressure of the blower 15 is 0.3MPa to 0.8MPa.

[0079] Optionally, the outlet pressure of the blower 15 is 0.3MPa, 0.4MPa, 0.5MPa, 0.6MPa, 0.7MPa or 0.8MPa, or the outlet pressure of the blower 15 may be within the range of any two of the above pressures.

[0080] In some embodiments, the air volume of the blower 15 is 40,000 Nm. 3 / h~100000Nm 3 / h.

[0081] Optionally, the air volume of the blower 15 is 40000 Nm. 3 / h, 50000Nm 3 / h, 60000Nm 3 / h, 70000Nm 3 / h, 80000Nm 3 / h, 90000Nm 3 / h or 100000Nm 3 / h, or the air volume of the blower 15 can be within the range of any two of the above air volumes.

[0082] In some embodiments, the particle size of the air-quenched steel slag obtained by air quenching the steel slag is less than 10 mm.

[0083] It is understandable that air quenching can produce spherical granular quenched steel slag.

[0084] The following are specific embodiments.

[0085] Example 1

[0086] Production conditions: A steel ladle with an inner diameter of 2m and a height of 3m, containing approximately 15t~16t of hot steel slag, is heated for 15 minutes using an induction coil at a power of 600kwh / t, with a flux of 60Nm. 3 N2 flow rate is used to inject carbon powder for reduction. After reduction, the sealing device is opened, and the molten steel enters the liquid collection device through the reversing device. After slag appears at the outlet, the reversing device is moved to allow the slag to slide through the chute to the outlet of the blowing device. The nozzle of the blowing device sprays high-pressure air at a pressure of 0.6 MPa and a flow rate of 80,000 Nm³. 3 / h, the steel slag is sprayed into air-quenched steel slag particles with an equivalent diameter of <10mm and enters the slag collection chamber.

[0087] Production results: Tests showed that the total iron content in the steel slag decreased from 20% to 4%, and the P2O5 content decreased from 1.8% to 0.14%.

[0088] 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.

[0089] 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, It includes the machine base, powder spraying tank, connecting pipe, rotary spray gun, rotary control device, steel ladle, and induction coil; 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 induction coil is wound around the outer wall of the ladle and is used to heat the steel slag in the cavity; The rotary spray gun is mounted on the machine base; the rotary spray gun is capable of rotating about 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 located on the machine base and is 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 1, characterized in that, The ladle has a steel outlet located at the bottom of the ladle; the ladle also includes a sealing device for closing the steel outlet.

5. The steel slag treatment equipment according to claim 4, characterized in that, The steel slag processing equipment also includes a reversing device; the reversing device is movably disposed on the discharge side of the steel outlet to receive the material discharged from the steel outlet; the reversing device includes a first conveying channel and a second conveying channel with different conveying directions.

6. The steel slag treatment equipment according to claim 5, characterized in that, The steel slag treatment equipment also includes a molten steel collection device; the molten steel collection device is located on the discharge side of the first material conveying channel, and the molten steel collection device is used to collect the molten steel discharged from the first material conveying channel.

7. The steel slag treatment equipment according to claim 6, characterized in that, The steel slag treatment equipment also includes a chute, a blower, and a slag collection chamber; The chute is located on the discharge side of the second material conveying channel and is used to receive the steel slag discharged from the second material conveying channel. The air outlet of the blowing device is arranged facing the discharge side of the slide, and is used to air quench the steel slag discharged through the slide. The slag collection chamber is used to receive steel slag that has been air-quenched by the blowing device.

8. 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.

9. 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.

10. The steel slag treatment equipment according to any one of claims 1 to 9, 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.

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