Split type slag ladle, steel slag treatment equipment and steel slag treatment method

Abstract

The invention relates to a split type slag ladle, steel slag treatment equipment and a steel slag treatment method. The split type slag pot comprises a slag pot body. The slag pot body comprises a first pot body and a second pot body. The first tank body is provided with a first cavity used for containing steel slag, and the first cavity is provided with an opening and a bottom plate which are oppositely arranged. The second tank body is provided with a second cavity. The second tank body further comprises a cover plate, and the cover plate covers the opening of the second cavity. The bottom plate abuts against the cover plate. And molten steel outflow holes are formed in the bottom plate and the cover plate, communicate with the first cavity and the second cavity and are used for enabling molten steel to flow into the second cavity from the first cavity. The split type slag ladle can be used for cyclic utilization treatment of the steel slag, the treated steel slag can be subjected to rapid slag-steel separation, and slag-steel separation which is low in difficulty and easy to operate is achieved.

Description

Technical Field

[0001] The present application relates to the technical field of steel slag recycling, and in particular to a split slag pot, steel slag processing equipment and a steel slag processing method. Background Art

[0002] Converter slag is difficult to directly recycle because it contains P2O5, which is harmful to the performance of steel. Some of the CaO and MgO contained in the slag are combined with other components in a chemical state, and some exist in a free state. Exposure to the air will cause volume expansion. Therefore, the slag must be processed before it can be used in building materials, and the amount used is limited. In view of the characteristics of slag, the existing technologies for recycling slag mainly include hot stewing, hot pouring, and drums. After the slag is crushed and magnetically separated, the iron-rich part is returned to steelmaking, the tailings part is returned for sintering, and the remaining part is used for cement, roadbed or piled up for landfill.

[0003] In the traditional method of recycling steel slag, the slag and steel need to be separated through steps such as crushing, screening, and magnetic separation. The separation is difficult and the operation is complicated. Summary of the invention

[0004] Based on this, it is necessary to provide a split slag pot, steel slag processing equipment and steel slag processing method. The split slag pot of the present application can be used for recycling steel slag, and can quickly separate the slag and steel from the processed steel slag, achieving slag and steel separation with low difficulty and simple operation.

[0005] In the first aspect, the present application provides a split slag pot, comprising a slag pot body; the slag pot body comprises a first pot body and a second pot body; the first pot body has a first cavity for holding steel slag, the first cavity having an opening and a bottom plate relatively arranged; the second pot body has a second cavity; the second pot body also comprises a cover plate, the cover plate covers the opening of the second cavity; the bottom plate and the cover plate are abutted against each other; the bottom plate and the cover plate are provided with molten steel outflow holes, the molten steel outflow holes connect the first cavity and the second cavity, and the molten steel outflow holes are used to allow molten steel to flow from the first cavity into the second cavity.

[0006] In some embodiments, the split slag pot further includes a limiting device, which connects the bottom plate and the cover plate; the limiting device is used to limit the relative position between the first tank body and the second tank body.

[0007] In some embodiments, the bottom plate protrudes from the outer wall of the first tank body, the cover plate protrudes from the outer wall of the second tank body, and the limiting device is connected to the portion of the bottom plate protruding from the outer wall of the first tank body and the portion of the cover plate protruding from the outer wall of the second tank body.

[0008] In some embodiments, the slag pot body further includes an abutment portion; the abutment portion is connected to an end portion of the cover plate, and the abutment portion protrudes from the cover plate in a direction away from the first pot body.

[0009] In some embodiments, the split slag pot further includes a thrust device, a receiving device and a blocking device;

[0010] The thrust device can abut against the abutment portion to move the second tank body within the plane where the contact surface of the bottom plate and the cover plate is located;

[0011] The receiving device has a receiving surface for receiving the second tank body, and the receiving surface is located in the plane where the contact surface of the cover plate and the bottom plate is located; the receiving device moves synchronously with the second tank body along the moving direction of the second tank body;

[0012] The blocking device is used to block the movement of the first tank.

[0013] In some of the embodiments, the split slag pot further includes a lifting ring, which is disposed on an outer wall of the second pot body.

[0014] In a second aspect, the present application provides a steel slag processing device, comprising the split slag pot described in any one of the above items;

[0015] The slag treatment equipment also includes a machine platform, a powder spraying tank, a connecting pipe, a rotary spray gun and a rotary control device;

[0016] The powder spray can is arranged on the machine platform, and the powder spray can is used for spraying reducing agent powder;

[0017] The rotary spray gun is arranged on the machine platform; the rotary spray gun can rotate around its axis; the discharge end of the rotary spray gun is arranged in the first cavity; the discharge end of the powder spray tank is connected to the feed end of the rotary spray gun through the connecting pipe, which is used to spray the reducing agent powder into the cavity; the rotation control device is arranged on the machine platform, and the rotation control device is connected to the rotary spray gun to control the rotation of the rotary spray gun.

[0018] In some embodiments, the rotary spray gun includes a powder spraying tube, a support tube and an insulation tube which are nested in sequence from the inside to the outside; the discharge end of the powder spraying tank is connected to the feed end of the powder spraying tube through the connecting tube; the rotation control device is connected to the support tube; the rotary spray gun also includes a paddle, which is arranged on the periphery of the insulation tube and close to one side of the bottom of the first cavity.

[0019] In some embodiments, the slag processing equipment also includes a lifting control device, which is disposed on the machine platform; the lifting control device is connected to the rotary spray gun, and the lifting control device is used to control the setting height of the rotary spray gun in the first cavity.

[0020] In a third aspect, the present application provides a steel slag treatment method, using any of the above-mentioned steel slag treatment equipment to treat steel slag, comprising the following steps:

[0021] Adding hot steel slag to be treated into the first cavity of the first tank body and allowing the steel slag to cover the discharge end of the rotary spray gun;

[0022] The reducing agent powder is sprayed out at the discharge end of the rotary spray gun through the powder spray tank, and the rotary spray gun is controlled to rotate through the rotation control device, so that the reducing agent powder and the hot steel slag are mixed through the rotation of the rotary spray gun to perform a reduction treatment on the hot steel slag; the molten steel obtained by the reduction flows into the second chamber through the molten steel outflow hole;

[0023] After the molten steel is cooled, the first tank body and the second tank body are separated.

[0024] In some embodiments, the split slag pot further includes a limiting device, which connects the bottom plate and the cover plate; the limiting device is used to limit the relative position between the first tank body and the second tank body; the bottom plate protrudes from the outer wall of the first tank body, the cover plate protrudes from the outer wall of the second tank body, and the limiting device is connected to the portion of the bottom plate protruding from the outer wall of the first tank body and the portion of the cover plate protruding from the outer wall of the second tank body; the slag pot body further includes an abutment portion; the abutment portion is connected to the end of the cover plate, and the abutment portion The split slag pot further comprises a thrust device, a receiving device and a blocking device; the thrust device can abut against the abutting portion to enable the second tank body to move within the plane where the contact surface between the bottom plate and the cover plate is located; the receiving device has a receiving surface for receiving the second tank body, and the receiving surface is located within the plane where the contact surface between the cover plate and the bottom plate is located; the receiving device moves synchronously with the second tank body along the moving direction of the second tank body; the blocking device is used to block the movement of the first tank body;

[0025] Separating the first tank body and the second tank body comprises the following steps:

[0026] Turning over the split slag pot so that the second pot body is located above the first pot body;

[0027] The blocking device is brought into contact with the first tank body, the restriction of the relative position of the first tank body and the second tank body by the limiting device is released, the thrust device is brought into contact with the abutting portion, and the second tank body is moved within the plane where the contact surface of the bottom plate and the cover plate is located by the thrust device;

[0028] The receiving surface of the receiving device contacts the cover plate to receive the second tank body, so that the receiving device moves synchronously with the second tank body along the moving direction of the second tank body.

[0029] The above-mentioned split slag tank can be used for recycling steel slag. When in use, the hot steel slag to be treated is added into the first cavity. The hot steel slag is subjected to reduction treatment so that the steel slag generates molten metal steel under the action of the reduction reaction. The molten steel will flow into the second cavity through the molten steel outflow hole, and the unreacted slag will remain in the first cavity. By separating the first tank body and the second tank body, the treated steel slag can be quickly separated from the slag and steel, achieving a slag and steel separation with low difficulty and simple operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] FIG1 is a schematic structural diagram of a split slag pot provided in one embodiment of the present application;

[0031] FIG2 is a schematic structural diagram of a split slag pot provided in another embodiment of the present application;

[0032] FIG3 is a schematic structural diagram of a slag treatment device provided in another embodiment of the present application;

[0033] FIG. 4 is a schematic diagram of a partial structure of a rotary spray gun provided in one embodiment of the present application.

[0034] Description of Reference Numerals

[0035] 1. Bottom plate; 2. Cover plate; 3. Abutment part; 4. First tank body; 5. Limiting device; 6. Second tank body; 7. Steel slag; 8. Liquid steel; 9. Lifting ring; 10. Thrust device; 11. Receiving device; 12. Blocking device; 13. Powder spraying tank; 14. Connecting pipe; 15. Rotary joint; 16. Coupling; 17. Rotary spray gun; 18. Paddle; 19. Powder spraying tube; 20. Support tube; 21. Insulation tube; 22. Rotation control device; 23. Lifting control device; 24. Fixed pulley; 25. Traction piece; 26. Dust removal device; 27. Machine. DETAILED DESCRIPTION

[0036] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0038] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0039] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, "plurality" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0040] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0041] As shown in Figure 1, an embodiment of the present application provides a split slag pot, including a slag pot body. The slag pot body includes a first tank body 4 and a second tank body 6. The first tank body 4 has a first cavity for holding steel slag, and the first cavity has an opening and a bottom plate 1 that are relatively arranged. The second tank body 6 has a second cavity. The second tank body 6 also includes a cover plate 2, and the cover plate 2 covers the opening of the second cavity. The bottom plate 1 and the cover plate 2 are abutted against each other. A molten steel outflow hole is opened on the bottom plate 1 and the cover plate 2, and the molten steel outflow hole connects the first cavity and the second cavity, and the molten steel outflow hole is used to allow the molten steel to flow from the first cavity into the second cavity.

[0042] The above-mentioned split slag pot can be used for recycling steel slag. When in use, the hot steel slag to be treated is added into the first cavity. The hot steel slag is subjected to reduction treatment so that the steel slag generates molten metal steel under the action of the reduction reaction. The molten steel will flow into the second cavity through the molten steel outflow hole, and the unreacted slag will remain in the first cavity. By separating the first tank body 4 and the second tank body 6, the treated steel slag can be quickly separated from the slag and steel, achieving a slag and steel separation with low difficulty and simple operation.

[0043] It can be understood that the aperture of the molten steel outflow hole is controlled so that the molten steel can pass through but the slag cannot pass through.

[0044] In some embodiments, the split slag pot further includes a limiting device 5, which connects the bottom plate 1 and the cover plate 2. The limiting device 5 is used to limit the relative position between the first tank body 4 and the second tank body 6.

[0045] During the process of processing the steel slag, the first tank body 4 and the second tank body 6 can be fixed by the limiting device 5. After the processing is completed, the restriction of the limiting device 5 on the first tank body 4 and the second tank body 6 can be released to facilitate the separation of the first tank body 4 and the second tank body 6.

[0046] In some embodiments, the bottom plate 1 protrudes from the outer wall of the first tank body 4, the cover plate 2 protrudes from the outer wall of the second tank body 6, and the limiting device 5 is connected to the portion of the bottom plate 1 protruding from the outer wall of the first tank body 4 and the portion of the cover plate 2 protruding from the outer wall of the second tank body 6.

[0047] The limiting device 5 is connected to the portion of the bottom plate 1 protruding from the outer wall of the first tank body 4 and the portion of the cover plate 2 protruding from the outer wall of the second tank body 6, so as to facilitate the release of the limiting device 5 from the restriction of the first tank body 4 and the second tank body 6. Exemplarily, the limiting device 5 can be fixed to the first tank body 4 and the second tank body 6 by bolts through the openings on the bottom plate 1 and the cover plate 2.

[0048] In some embodiments, the slag pot body further includes an abutment portion 3. The abutment portion 3 is connected to an end of the cover plate 2, and the abutment portion 3 protrudes from the cover plate 2 in a direction away from the first pot body 4.

[0049] The abutting portion 3 can cooperate with a device for applying an external force, so as to facilitate separation of the first tank body 4 and the second tank body 6 .

[0050] As shown in FIG. 2 , in some embodiments, the split slag pot further includes a thrust device 10, a receiving device 11 and a blocking device 12. The thrust device 10 can abut against the abutting portion 3 to move the second tank body 6 within the plane where the contact surface of the bottom plate 1 and the cover plate 2 is located. The receiving device 11 has a receiving surface for receiving the second tank body 6, and the receiving surface is located within the plane where the contact surface of the cover plate 2 and the bottom plate 1 is located. The receiving device 11 moves synchronously with the second tank body 6 along the moving direction of the second tank body 6. The blocking device 12 is used to block the movement of the first tank body 4.

[0051] Through the cooperation of the thrust device 10, the receiving device 11 and the blocking device 12, the separation and resetting of the first tank body 4 and the second tank body 6 can be easily achieved.

[0052] In some of the embodiments, the split slag pot further includes a lifting ring 9 , which is disposed on the outer wall of the second tank body 6 .

[0053] After the split slag pot is turned over, the first tank body 4 and the second tank body 6 can be separated by lifting the second tank body 6 through the lifting ring 9 provided on the outer wall of the second tank body 6 or by connecting the lifting ring 9 with a lifting machine.

[0054] As shown in Figure 3, another embodiment of the present application provides a slag processing equipment, including any of the split slag pots described above. The slag processing equipment also includes a machine 27, a powder spraying tank 13, a connecting pipe 14, a rotary spray gun 17 and a rotation control device 22. The powder spraying tank 13 is arranged on the machine 27, and the powder spraying tank 13 is used to spray the reducing agent powder. The rotary spray gun 17 is arranged on the machine 27. The rotary spray gun 17 can rotate around its axis. The discharge end of the rotary spray gun 17 is arranged in the first cavity. The discharge end of the powder spraying tank 13 is connected to the feed end of the rotary spray gun 17 through the connecting pipe 14, and is used to spray the reducing agent powder into the cavity. The rotation control device 22 is arranged on the machine 27, and the rotation control device 22 is connected to the rotary spray gun 17 to control the rotation of the rotary spray gun 17.

[0055] The above-mentioned slag treatment equipment can be used for recycling slag. When in use, the hot slag to be treated can be added into the first cavity, and the slag can bury the discharge end of the rotary spray gun 17. The rotation control device 22 is connected to the rotary spray gun 17 to control the rotary spray gun 17 to rotate around its axis. After adding the slag, the reducing agent powder can be sprayed through the rotary spray gun 17, so that the reducing agent powder is sprayed into the slag through the discharge end of the rotary spray gun 17. At the same time, through the rotation of the rotary spray gun 17, the reducing agent powder and the slag can be mixed, so that the slag generates metal steel liquid under the action of the reduction reaction. Under the combined action of spraying and stirring, the metal steel liquid contained in the slag and the steel liquid generated by the reaction will converge, and due to the gravity difference between the steel liquid and the steel slag, the steel liquid will enter the second cavity through the steel liquid outflow hole, achieving a better separation effect between the metal steel liquid and the steel slag. At the same time, during the reduction reaction, the CO gas generated by the reaction will continue to be stirred and mixed with the steel slag during the rising process, and continue to react with the steel slag on the upper layer, thereby increasing the effective utilization rate. The steel slag processing equipment of the present application can make good use of the physical heat of the hot steel slag during use, and achieve good mixing and reduction effects through blowing and rotary stirring, so that the FeO in the steel slag can be reduced in large quantities, and P2O5 can be reduced to the molten steel liquid, which has a good purification effect on the steel slag. The steel slag processing equipment of the present application can be used for the recycling of steel slag, and can improve the recovery rate of the metal steel liquid in the steel slag and the recycling rate of the steel slag. At the same time, the separation of slag and steel with low difficulty and simple operation can be achieved through the split slag pot.

[0056] It can be understood that hot steel slag refers to steel slag with a certain temperature.

[0057] As shown in FIG4 , in some embodiments, the rotary spray gun 17 includes a powder spraying tube 19, a support tube 20, and a heat insulation tube 21 which are nested from the inside to the outside. The discharge end of the powder spraying tank 13 is connected to the feed end of the powder spraying tube 19 through a connecting tube 14. The rotation control device 22 is connected to the support tube 20. The rotary spray gun 17 also includes a paddle 18, which is arranged on the periphery of the heat insulation tube 21 and close to one side of the bottom of the first cavity.

[0058] In the rotary spray gun 17, the outermost insulation tube 21 is used to provide thermal insulation protection for the inner powder spray tube 19 and the support tube 20. The support tube 20 is connected to the rotation control device 22 to control the rotary spray gun 17 to rotate around its axis. When in use, the hot slag to be treated can be added into the first cavity, and the slag can bury the paddle 18. At the same time, through the rotation of the rotary spray gun 17, the paddle 18 stirs the slag, which can achieve a better mixing effect between the reducing agent powder and the slag.

[0059] In some embodiments, the slag processing equipment further includes a lifting control device 23, which is disposed on a platform 27. The lifting control device 23 is connected to the rotary lance 17, and is used to control the height of the rotary lance 17 in the first cavity.

[0060] The height of the rotary lance 17 in the first cavity can be controlled by the lifting control device 23, so that the initial position of the rotary lance 17 is close to the bottom wall of the first cavity, so that the reducing agent powder and the steel slag have a better mixing effect.

[0061] In some embodiments, the slag processing equipment further includes a fixed pulley 24 and a traction member 25, wherein the fixed pulley 24 is disposed on a machine platform 27, one end of the traction member 25 is connected to the lifting control device 23, and the other end is connected to the rotary lance 17 after passing through the fixed pulley 24. The traction member 25 is used to pull the rotary lance 17 to adjust the setting height of the rotary lance 17 in the cavity.

[0062] In some embodiments, the slag processing equipment further includes a rotary joint 15 and a coupling 16. One end of the coupling 16 is connected to the rotary joint 15, and the other end is connected to the rotary lance 17. The discharge end of the connecting pipe 14 is connected to the rotary joint 15.

[0063] In some embodiments, the slag processing equipment further includes a dust removal device 26, and the dust removal device 26 is disposed on a machine platform 27. The dust removal device 26 is disposed toward the opening of the first cavity.

[0064] Since the reducing agent powder is sprayed into the first cavity through the powder spraying pipe 19, a lot of dust will be generated. The dust generated can be collected by the dust removal device 26 arranged toward the opening of the first cavity.

[0065] In some embodiments, the length of the blade 18 along the axial direction of the rotating spray gun 17 is 200 mm to 800 mm.

[0066] Optionally, the axial length of the blade 18 along the rotating spray gun 17 is 200mm, 250mm, 300mm, 350mm, 400mm, 450mm, 500mm, 550mm, 600mm, 650mm, 700mm, 750mm or 800mm, or the axial length of the blade 18 along the rotating spray gun 17 may also be within the range between any two of the above lengths.

[0067] In some embodiments, the length of the blade 18 along the radial direction of the rotary spray gun 17 is 200 mm to 800 mm.

[0068] Optionally, the radial length of the blade 18 along the rotating spray gun 17 is 200mm, 250mm, 300mm, 350mm, 400mm, 450mm, 500mm, 550mm, 600mm, 650mm, 700mm, 750mm or 800mm, or the radial length of the blade 18 along the rotating spray gun 17 may also be within the range between any two of the above lengths.

[0069] Another embodiment of the present application provides a steel slag treatment method, using any of the above steel slag treatment equipment to treat steel slag, comprising the following steps:

[0070] Add the hot steel slag to be treated into the first cavity of the first tank 4 and make the steel slag cover the discharge end of the rotary spray gun 17;

[0071] The reducing agent powder is sprayed out from the discharge end of the rotary spray gun 17 through the powder spray tank 13, and the rotary spray gun 17 is controlled to rotate by the rotation control device 22. The reducing agent powder and the hot steel slag are mixed by the rotation of the rotary spray gun 17 to reduce the hot steel slag. The molten steel obtained by the reduction flows into the second chamber through the molten steel outflow hole;

[0072] After the molten steel is cooled, the first tank body 4 and the second tank body 6 are separated.

[0073] The hot steel slag to be treated is added into the first cavity, and the steel slag is buried in the discharge end of the rotary spray gun 17. After the steel slag is added, the reducing agent powder can be sprayed through the rotary spray gun 17, so that the reducing agent powder is sprayed into the steel slag through the discharge end of the rotary spray gun 17. At the same time, through the rotation of the rotary spray gun 17, the reducing agent powder and the steel slag can be mixed, so that the steel slag generates metal molten steel under the action of the reduction reaction. Under the combined action of spraying and stirring, the metal molten steel contained in the steel slag and the molten steel generated by the reaction will converge, and due to the gravity difference between the molten steel and the steel slag, the metal molten steel will enter the second cavity through the molten steel outflow hole, achieving a better separation effect between the metal molten steel and the steel slag. At the same time, during the reduction reaction, the CO gas generated by the reaction will continue to be stirred and mixed with the steel slag during the rising process, and continue to react with the steel slag on the upper layer, increasing the effective utilization rate. The steel slag treatment method of the present application can make good use of the physical heat of hot steel slag, achieve good mixing and reduction effects through blowing and rotary stirring, can reduce a large amount of FeO in the steel slag, and reduce P2O5 to molten steel liquid, which has a good purification effect on the steel slag. The steel slag treatment method of the present application can improve the recovery rate of the metal steel liquid in the steel slag and the recycling rate of the steel slag. At the same time, the steel slag treatment method of the present application can achieve slag and steel separation with low difficulty and simple operation.

[0074] In some embodiments, separating the first tank body 4 and the second tank body 6 comprises the following steps:

[0075] Turn over the split slag pot so that the second pot body 6 is located above the first pot body 4;

[0076] The blocking device 12 is brought into contact with the first tank body 4, the restriction of the relative position of the first tank body 4 and the second tank body 6 by the limiting device 5 is released, the thrust device 10 is brought into contact with the abutting portion 3, and the second tank body 6 is moved within the plane where the contact surface of the bottom plate 1 and the cover plate 2 is located by the thrust device 10;

[0077] The receiving surface of the receiving device 11 contacts the cover plate 2 to receive the second tank body 6 , so that the receiving device 11 moves synchronously with the second tank body 6 along the moving direction of the second tank body 6 .

[0078] In some embodiments, the reducing agent powder includes at least one of coal powder, coke powder, carbon powder and ferrosilicon powder.

[0079] Exemplarily, the reducing agent powder may react with FeO in the steel slag as follows:

[0080] FeO+C=Fe+CO, or, 2FeO+Si=2Fe+SiO2.

[0081] In some embodiments, the initial distance between the discharge end of the rotary spray gun 17 and the bottom wall of the cavity is set to 300 mm to 500 mm.

[0082] Optionally, the initial distance between the discharge end of the rotary spray gun 17 and the bottom wall of the cavity is 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 17 and the bottom wall of the cavity can also be set within the range between any two of the above distances.

[0083] In some embodiments, the rotation speed of the rotary spray gun 17 is 20 r / min-150 r / min.

[0084] The mixed reduction effect between the reducing agent powder and the steel slag is better within the range of the rotation speed of the rotary spray gun 17. Optionally, the rotation speed of the rotary spray gun 17 is 20r / min, 30r / min, 50r / min, 80r / min, 100r / min, 120r / min, 140r / min or 150r / min, or the rotation speed of the rotary spray gun 17 can also be within the range between any two of the above rotation speeds.

[0085] In some embodiments, the reducing agent powder is introduced in an amount of 20 kg / min to 50 kg / min.

[0086] Within the range of the above-mentioned amount of reducing agent powder, a better mixed reduction between reducing agent powder and steel slag can be achieved, and the recovery rate of molten metal in steel slag and the recycling rate of steel slag can be improved. Optionally, the amount of reducing agent powder introduced is 20kg / min, 25kg / min, 30kg / min, 35kg / min, 40kg / min, 45kg / min or 50kg / min, or the amount of reducing agent powder introduced can also be within the range between any two of the above-mentioned amounts.

[0087] In some embodiments, the reducing agent powder is introduced into the cavity by a carrier gas, and the flow rate of the carrier gas is 20Nm 3 / h~80Nm 3 / h.

[0088] Optionally, the carrier gas flow rate is 20 Nm 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 may be within the range between any two of the above flow rates.

[0089] In some embodiments, the carrier gas includes nitrogen.

[0090] In some embodiments, the powder spraying pressure of the powder spraying tank 13 is 0.3 MPa to 0.5 MPa.

[0091] By applying a certain pressure to spray the reducing agent powder into the cavity and mix it with the steel slag, a better mixed reduction between the reducing agent powder and the steel slag can be achieved, and the recovery rate of the molten metal in the steel slag and the recycling rate of the steel slag can be improved. Optionally, the powder spraying pressure of the powder spraying tank 13 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 13 can also be within the range between any two of the above pressures.

[0092] The following are specific embodiments

[0093] Example 1

[0094] Production conditions: The first tank of the 210t converter has an opening diameter of 4.2m and an inner height of 3.7m. The inner height of the second tank is 0.5m, which contains about 45t~50t of hot slag. The split slag pot is transported to the rotary injection processing station and starts to inject coal powder for reduction.

[0095] Production parameters: coal powder input amount 45kg / t, rotary spray gun speed 80r / min, stand for 2h after treatment.

[0096] Production results: 7t~8t of steel blocks were poured out of the second cavity. After testing, the FeO content in the steel slag was reduced from 22% to 4%, and the P2O5 content was reduced from 1.1% to 0.11%.

[0097] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described 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.

[0098] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the attached claims, and the description and drawings may be used to interpret the contents of the claims.

Claims

1. A split slag pot, characterized in that: It includes a slag pot body; the slag pot body includes a first pot body and a second pot body; the first pot body has a first cavity for holding steel slag, the first cavity has an opening and a bottom plate arranged opposite to each other; the second pot body has a second cavity; the second pot body also includes a cover plate, the cover plate covers the opening of the second cavity; the bottom plate and the cover plate are abutted against each other; the bottom plate and the cover plate are provided with molten steel outflow holes, the molten steel outflow holes connect the first cavity and the second cavity, and the molten steel outflow holes are used to allow molten steel to flow from the first cavity into the second cavity.

2. The split slag pot according to claim 1, characterized in that: The split slag pot also includes a limiting device, which connects the bottom plate and the cover plate; the limiting device is used to limit the relative position between the first tank body and the second tank body.

3. The split slag pot according to claim 2, characterized in that: The bottom plate protrudes from the outer wall of the first tank body, the cover plate protrudes from the outer wall of the second tank body, and the limiting device is connected to the portion of the bottom plate protruding from the outer wall of the first tank body and the portion of the cover plate protruding from the outer wall of the second tank body.

4. The split slag pot according to claim 3, characterized in that: The slag pot body further includes an abutment portion; the abutment portion is connected to an end portion of the cover plate, and the abutment portion protrudes from the cover plate in a direction away from the first pot body.

5. The split slag pot according to claim 4, characterized in that: The split slag pot also includes a thrust device, a receiving device and a blocking device; The thrust device can abut against the abutment portion to move the second tank body within the plane where the contact surface of the bottom plate and the cover plate is located; The receiving device has a receiving surface for receiving the second tank body, and the receiving surface is located in the plane where the contact surface of the cover plate and the bottom plate is located; the receiving device moves synchronously with the second tank body along the moving direction of the second tank body; The blocking device is used to block the movement of the first tank.

6. The split slag pot according to any one of claims 1 to 5, characterized in that: The split slag pot also includes a lifting ring, which is arranged on the outer wall of the second pot body.

7. A slag processing device, characterized in that: A split slag pot comprising any one of claims 1 to 6; The slag treatment equipment also includes a machine platform, a powder spraying tank, a connecting pipe, a rotary spray gun and a rotary control device; The powder spray can is arranged on the machine platform, and the powder spray can is used for spraying reducing agent powder; The rotary spray gun is arranged on the machine platform; the rotary spray gun can rotate around its axis; the discharge end of the rotary spray gun is arranged in the first cavity; the discharge end of the powder spray tank is connected to the feed end of the rotary spray gun through the connecting pipe, which is used to spray the reducing agent powder into the cavity; the rotation control device is arranged on the machine platform, and the rotation control device is connected to the rotary spray gun to control the rotation of the rotary spray gun.

8. The slag processing equipment according to claim 7, characterized in that: The rotary spray gun comprises a powder spraying tube, a support tube and a heat-insulating tube which are nested in sequence from the inside to the outside; the discharge end of the powder spraying tank is connected to the feed end of the powder spraying tube through the connecting tube; the rotation control device is connected to the support tube; the rotary spray gun further comprises a paddle, which is arranged on the periphery of the heat-insulating tube and close to one side of the bottom of the first cavity; and / or, The slag processing equipment also includes a lifting control device, which is arranged on the machine platform; the lifting control device is connected to the rotary spray gun, and the lifting control device is used to control the setting height of the rotary spray gun in the first cavity.

9. A method for treating steel slag, characterized in that: The steel slag treatment equipment according to claim 7 or 8 is used to treat steel slag, comprising the following steps: Adding hot steel slag to be treated into the first cavity of the first tank body and allowing the steel slag to cover the discharge end of the rotary spray gun; The reducing agent powder is sprayed out at the discharge end of the rotary spray gun by the powder spray tank, and the rotary spray gun is controlled to rotate by the rotation control device, so that the reducing agent powder and the hot steel slag are mixed by the rotation of the rotary spray gun to perform reduction treatment on the hot steel slag; allowing the molten steel obtained by reduction to flow into the second chamber through the molten steel outflow hole; After the molten steel is cooled, the first tank body and the second tank body are separated.

10. The steel slag treatment method according to claim 9, characterized in that: The split slag pot also includes a limiting device, which connects the bottom plate and the cover plate; the limiting device is used to limit the relative position between the first tank body and the second tank body; the bottom plate protrudes from the outer wall of the first tank body, the cover plate protrudes from the outer wall of the second tank body, and the limiting device is connected to the part of the bottom plate protruding from the outer wall of the first tank body and the part of the cover plate protruding from the outer wall of the second tank body; the slag pot body also includes an abutment; the abutment is connected to the end of the cover plate, and the abutment protrudes from the cover plate in a direction away from the first tank body; the split slag pot also includes a thrust device, a receiving device and a blocking device; the thrust device can abut against the abutment so that the second tank body moves within the plane where the contact surface of the bottom plate and the cover plate is located; the receiving device has a receiving surface for receiving the second tank body, and the receiving surface is located in the plane where the contact surface of the cover plate and the bottom plate is located; the receiving device moves synchronously with the second tank body along the moving direction of the second tank body; the blocking device is used to block the movement of the first tank body; Separating the first tank body and the second tank body comprises the following steps: Turning over the split slag pot so that the second pot body is located above the first pot body; The blocking device is brought into contact with the first tank body, the restriction of the relative position of the first tank body and the second tank body by the limiting device is released, the thrust device is brought into contact with the abutting portion, and the second tank body is moved within the plane where the contact surface of the bottom plate and the cover plate is located by the thrust device; The receiving surface of the receiving device contacts the cover plate to receive the second tank body, so that the receiving device moves synchronously with the second tank body along the moving direction of the second tank body.

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