A quick-change blowing and stirring tube and stirring and blowing system for inserting metal refining

Abstract

The present invention relates to the technical field of molten metal refining, and specifically discloses a quick-change blowing and stirring tube and stirring blowing system for inserting refined metal. The quick-change blowing and stirring tube adopts a detachably connected air-permeable part and blowing tube section design, which is convenient for maintenance and replacement. The stirring and blowing system includes a cover plate, a quick-change blowing and stirring tube, a rotating drive mechanism, and a lifting and rotating mechanism. The cover plate covers the refining container, and the quick-change blowing and stirring tube is installed on the cover plate, and the gas supply source is connected through the gas supply pipeline. The rotating drive mechanism drives the cover plate and the quick-change blowing and stirring tube to rotate, and the lifting and rotating mechanism is used to support and drive the cover plate to translate and lift vertically, so that the blowing and stirring tube is inserted into the molten metal. The technical solution of the present invention is adopted, so that the refining gas can be more evenly distributed in the entire refining container, thereby improving the refining efficiency; at the same time, it can produce a stirring effect on the molten metal, enhance the contact and mixing of the refining gas and the molten metal, and improve the refining effect.

Description

Technical Field

[0001] The invention relates to the technical field of molten metal refining, and in particular to an inserted quick-change blowing stirring tube for refining metal and a stirring blowing system. Background Art

[0002] Blowing gas into the molten metal for refining is a widely adopted process in the field of metallurgy. Its core lies in introducing refining gas (such as inert gas or active gas) into the molten metal pool. In this process, the bubbles generated by the gas in the melt play a key role. When they float up, they can effectively absorb or react and carry away harmful gas components (such as hydrogen, nitrogen, oxygen) and various inclusions (including oxides, sulfides, nitrides, etc.) in the molten pool, thereby achieving the purpose of refining. According to the different ways of introducing gas, air blowing refining is mainly divided into two categories: bottom blowing refining and top blowing refining.

[0003] Bottom blowing refining technology introduces refining gas into the molten metal through the air-permeable bricks or gas diffusion devices installed at the bottom of the melting furnace or ladle. Bottom blowing refining has good refining effect, but there are risks of blockage and steel leakage. Its implementation requires precise control of blowing pressure and flow, which places high demands on the professional skills of operators and the level of automation control of equipment.

[0004] In contrast, the top-blowing refining technology starts from the top of the melting furnace or ladle, inserting a blowing pipe into the furnace or ladle, and the refining gas enters the molten metal through the pipe, forming bubbles and causing impurities and gases to float up. However, the currently commonly used top-blowing refining method has a significant limitation: the refining gas is mainly introduced through the blowing pipe located in the refining container, resulting in a relatively limited range of action. The molten metal outside the molten pool is difficult to fully contact the refining gas, which in turn affects the overall refining effect.

[0005] In addition, during use, the air pipe will be worn out due to exposure to the harsh environment of high temperature, high pressure and chemical corrosion. If it is operated improperly, it may easily cause the air pipe to be damaged. These factors together result in the air pipe having a short service life, and it needs to be replaced regularly to ensure its normal operation. Frequent replacement of the air pipe leads to reduced production efficiency and increased production costs. Summary of the invention

[0006] In response to the problems existing in the above-mentioned prior art, the present invention provides an insertable quick-change air blowing and stirring tube and a stirring and blowing system for refining metal, which expands the scope of adsorption or reaction of the refining gas by stirring the molten metal and blowing in the refining gas, thereby improving the refining efficiency and effect of the molten metal in the molten pool, while extending the service life of the air blowing tube and reducing production and maintenance costs.

[0007] The present invention provides an insertable quick-change air blowing and stirring pipe for refining metal, comprising an air permeable portion and more than one air blowing pipe section, each air blowing pipe section being an independent unit, the air blowing pipe section comprising a heat-resistant steel pipe and a refractory material layer wrapped around the heat-resistant steel pipe, an extended connecting column is provided at one end of the heat-resistant steel pipe, and an embedding groove matching the connecting column is provided at the other end, adjacent air blowing pipe sections are detachably connected through the cooperation of the connecting column and the embedding groove, the air permeable portion comprises an air permeable portion body made of an air permeable material that is resistant to high temperature and has good air permeability, a connecting seat detachably connected to the embedding groove or connecting column on the air blowing pipe section is provided on the air permeable portion body, the air permeable portion is detachably connected to the air blowing pipe section at the end, refractory putty is provided at the joints where adjacent air blowing pipe sections are connected and at the joints where the air permeable portion is connected to the air blowing pipe section for sealing, and the upper end of the top air blowing pipe section is connected to the air supply pipeline through an air source joint.

[0008] Furthermore, an air cavity is provided in the ventilating portion, and the air cavity is communicated with the connecting seat.

[0009] Furthermore, the connection column and the embedding groove, as well as the connection seat and the embedding groove or the connection column are connected by threaded connection or rotating hook connection.

[0010] Furthermore, the cross section of the blowing pipe section is circular, elliptical or polygonal.

[0011] The present invention provides an insertable stirring and blowing system for metal refining, comprising any one of the above-mentioned quick-change blowing and stirring tubes, and also comprising a cover plate, a rotating drive mechanism, and a lifting and rotating mechanism;

[0012] The cover plate covers the refining container, and one or more quick-change air blowing and stirring tubes are vertically mounted on the cover plate;

[0013] The top of the quick-change air blowing and stirring pipe is fixedly connected to the cover plate through a connector and is connected to the air supply source through an air supply pipeline, so as to blow gas into the molten metal in the refining container;

[0014] The rotary drive mechanism is connected to the cover plate and drives the cover plate and the quick-change air blowing and stirring tube thereon to rotate;

[0015] The lifting and rotating mechanism is used to support and drive the cover plate to move horizontally and vertically, so that the quick-change blowing and stirring pipe can be inserted into the molten metal in the refining container.

[0016] Furthermore, a top air blowing pipe is provided on the lower end surface of the cover plate, and the top air blowing pipe is connected to an air supply source through an air supply pipeline.

[0017] Furthermore, the air supply pipeline connected to the quick-change air blowing and stirring pipe and the air supply pipeline connected to the top air blowing pipe are respectively connected to the gas control device, and the gas control device is used to independently regulate the gas flow and gas pressure entering the quick-change air blowing and stirring pipe and the top air blowing pipe respectively.

[0018] Furthermore, a mounting groove extending from the edge to the center is provided on the cover plate, and the top of the quick-change air blowing and stirring pipe is inserted into the mounting groove and fixedly connected to the cover plate through a connecting piece.

[0019] Furthermore, the upper end surface of the cover plate is covered with a thermal insulation pad.

[0020] Furthermore, it also includes a refining agent conveying mechanism, which includes a side bracket connected to the lifting and rotating mechanism, the front end of the side bracket is connected to a vertical lifting device, the movable end of the vertical lifting device is connected to a refining agent conveying rod, the refining agent conveying rod is a hollow tube with a refractory material coated on the outside, and the refining agent conveying rod is connected to the refining agent feeding device through a pipeline.

[0021] The beneficial effects of the present invention are:

[0022] (1) The insertable stirring and blowing system for metal refining of the present invention, by designing a rotating structure of a quick-change blowing and stirring tube, enables the refining gas to be more evenly distributed in the entire refining container, thereby expanding the contact range between the refining gas and the molten metal and improving the refining efficiency; at the same time, the rotating quick-change blowing and stirring tube can stir the molten metal in the refining container, further enhancing the contact and mixing between the gas and the molten metal, thereby improving the refining effect;

[0023] (2) By setting up a top blowing pipe and blowing inert gas with a high specific gravity such as argon through the top blowing pipe, some harmful gases above the molten metal in the refining container, such as hydrogen, oxygen and nitrogen, can be driven out and discharged from the refining container with the argon flow, thereby forming a protective gas layer on the surface of the molten metal and creating a relatively inert environment in the refining container to prevent the molten metal from reacting with hydrogen, oxygen, nitrogen and other gases in the air at high temperature and being contaminated, thereby improving the purity and quality of the molten metal;

[0024] (3) The quick-change air-blowing and stirring pipe adopts a detachable air-blowing pipe section design, which is convenient for maintenance and replacement of the air-blowing pipe. When a part (such as the air-permeable part or one of the air-blowing pipe sections) is damaged, only the part needs to be replaced without replacing the entire air-blowing and stirring pipe, thereby reducing maintenance costs;

[0025] (4) The number and position of the quick-change air-blowing stirring tubes can be adjusted according to the size of the refining container and the refining requirements to adapt to refining tasks of different scales and types, with good flexibility and scalability;

[0026] (5) A refining agent conveying mechanism is integrated. Refining agent can be injected into the molten metal through the refining agent conveying mechanism before stirring and blowing refining, avoiding direct contact between humans and high-temperature molten metal and refining agent, and reducing the risk of safety accidents. After the refining agent is injected, stirring and blowing are performed to promote a more efficient and thorough chemical reaction of the refining agent in the molten metal. The refining agent conveying mechanism works in coordination with the lifting and rotating mechanism, blowing and stirring tube and other components to jointly realize the automation of the metal refining process. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0028] Figure 2 It is a structural schematic diagram of the cover plate and the top air blowing pipe of the present invention.

[0029] Figure 3 It is a bottom view schematic diagram of the cover plate of the present invention.

[0030] Figure 4 It is a structural schematic diagram of the air blowing stirring tube of the present invention.

[0031] Figure 5 It is a structural schematic diagram of the air blowing pipe section of the air blowing stirring pipe of the present invention.

[0032] Figure 6 It is a schematic structural diagram of the air permeable portion of the air blowing stirring tube of the present invention.

[0033] Figure 7 It is a cross-sectional schematic diagram of the air blowing stirring tube of the present invention.

[0034] Figure 8 It is a schematic diagram of the present invention applied to a medium frequency smelting furnace.

[0035] Fig. 9 It is a schematic diagram of the present invention applied to a ladle.

[0036] Fig.10 It is a top view schematic diagram of the present invention integrating the refining agent conveying mechanism.

[0037] Fig.11 It is a schematic diagram of the overall structure of the present invention integrating the refining agent conveying mechanism.

[0038] In the figure: a cover plate 1, a heat-insulating cushion layer 101, and a mounting groove 102; a quick-change air blowing and stirring pipe 2, an air blowing pipe section 201, a heat-resistant steel pipe 2011, a refractory material layer 2012, a connecting column 2013, an embedding groove 2014, a breathable portion 202, a breathable portion body 2021, a connecting seat 2022, an air cavity 2023, an air source connector 203, and a refractory cement 204; a rotary drive mechanism 3; a lifting and rotating mechanism 4; a gas control device 5; an air supply source 6; a top air blowing pipe 7; a refining agent conveying mechanism 8, a side bracket 801, a vertical lifting device 802, a refining agent conveying rod 803, and a refining agent feeding device 804; and a refining container 9. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] See also Figure 4-Figure 6 The quick-change blowing and stirring pipe 2 provided in this embodiment includes a ventilating portion 202 and more than one blowing pipe section 201, each blowing pipe section 201 is an independent unit, and the blowing pipe section 201 includes a heat-resistant steel pipe 2011 and a refractory material layer 2012 wrapped outside the heat-resistant steel pipe 2011, an extended connecting column 2013 is provided at one end of the heat-resistant steel pipe 2011, and an embedded groove 2014 matching the connecting column 2013 is provided at the other end, and adjacent blowing pipe sections 201 are connected by The column 2013 and the embedded groove 2014 are detachably connected, and the air permeable part 202 includes an air permeable part body 2021 made of an air permeable material that is resistant to high temperature and has good air permeability. A connecting seat 2022 that is detachably connected to the embedded groove 2014 or the connecting column 2013 on the air pipe section 201 is provided on the air permeable part body 2021. The air permeable part 202 is detachably connected to the air pipe section 201 at the end, and the upper end of the air pipe section 201 at the top is connected to the air supply pipeline through the air source connector 203.

[0041] In this embodiment, the blowing and stirring pipe 2 adopts a modular design, and is composed of a permeable portion 202 and a plurality of blowing pipe sections 201. The permeable portion 202 and each blowing pipe section 201 are independent units, which are easy to disassemble, replace and repair. When a part thereof (such as the permeable portion 202 or a certain blowing pipe section 201) is damaged, only the damaged part needs to be replaced, and there is no need to replace the entire blowing and stirring pipe, thereby reducing maintenance costs. Refractory cement 204 is provided at the joints where adjacent blowing pipe sections 201 are connected and at the joints where the permeable portion 202 and the blowing pipe section 201 are connected for sealing, so as to prevent high-temperature molten metal from penetrating into the blowing pipe section 201 from the joints.

[0042] See also Figure 6 As another sub-embodiment of the above embodiment, an air cavity 2023 is provided in the air permeable portion 202, and the air cavity 2023 is communicated with the connecting seat 2022. In this embodiment, the air cavity 2023 is provided to ensure that the gas can be blown into the molten metal evenly and stably.

[0043] As another sub-embodiment of the above embodiment, threaded connection or rotary hook connection is adopted between the connecting column 2013 and the embedding groove 2014, and between the connecting seat 2022 and the embedding groove 2014 or the connecting column 2013, and the installation and disassembly can be facilitated by adopting a quick release structure.

[0044] As another sub-embodiment of the above embodiment, the cross section of the blowing pipe section 201 is circular, elliptical or polygonal. Figure 7 The cross-section design of the elliptical shape can increase the contact surface between the blowing pipe segment 1 and the molten metal, so that the stirring effect of the blowing pipe segment 1 on the molten metal is further improved when the blowing pipe segment 1 moves or rotates in the molten metal. It should be noted that the cross-sectional shape of the blowing pipe segment 1 of the present invention is not limited to a circle or an ellipse, and can also be other shapes known to those skilled in the art.

[0045] like Figure 1 As shown, the insertable stirring and blowing system for refined metal provided in this embodiment includes a cover plate 1, a quick-change blowing and stirring tube 2, a rotating drive mechanism 3, and a lifting and rotating mechanism 4. Wherein: the cover plate 1 covers the refining container 9, and one or more quick-change blowing and stirring tubes 2 are vertically installed on the cover plate 1. The top of the quick-change blowing and stirring tube 2 is fixedly connected to the cover plate 1 through a connecting piece, and is connected to the air supply source 6 through an air supply pipeline, which is used to blow gas into the molten metal in the refining container. The rotating drive mechanism 3 is connected to the cover plate 1, and drives the cover plate 1 and the quick-change blowing and stirring tube 2 thereon to rotate. The lifting and rotating mechanism 4 is used to support and drive the cover plate 1 to translate and lift vertically, so that the quick-change blowing and stirring tube 2 is inserted into the molten metal in the refining container.

[0046] In this embodiment, the rotary drive mechanism 3 drives the cover plate 1 and the quick-change air blowing and stirring tube 2 fixedly installed on the cover plate 1 to rotate with the central axis of the refining container as the rotation axis; to facilitate the adjustment of the rotation speed, the driving unit of the rotary drive mechanism 3 can adopt a speed-regulating motor, and to facilitate the connection of the air supply pipeline, the output end of the rotary drive mechanism 3 can be connected to the air supply pipeline through a rotary air supply joint.

[0047] The number of quick-change air blowing and stirring tubes 2 can be set to one or more according to the size of the refining container. By moving the quick-change air blowing and stirring tubes 2 in the refining container, on the one hand, the scope of action of the refining gas is expanded, so that the refining gas can be more evenly distributed in the entire molten pool, thereby improving the refining efficiency. On the other hand, the movement of the quick-change air blowing and stirring tubes 2 can produce a stirring effect on the molten metal, further enhancing the contact and reaction between the refining gas and the molten metal, thereby improving the refining effect.

[0048] The function of the lifting and rotating mechanism 4 is to support and drive the cover plate 1 to move horizontally and vertically, provide precise vertical lifting power for the quick-change air blowing and stirring tube 2, realize precise control of the insertion depth of the quick-change air blowing and stirring tube 2 into the molten metal, and lift the cover plate 1 and the quick-change air blowing and stirring tube 2 after the air blowing refining is completed, and separate the cover plate 1 and the quick-change air blowing and stirring tube 2 from the refining container 9 by rotation to avoid interference with other operations.

[0049] It should be noted that the rotary drive mechanism 3 and the lifting and rotating mechanism 4 can adopt universal standard parts or parts known to those skilled in the art, and their structures and principles are conventional technologies, which are not described and limited in detail in this application.

[0050] See also Figure 1-Figure 3 As another embodiment, a top blowing pipe 7 is provided on the lower end surface of the cover plate 1, and the top blowing pipe 7 is connected to the gas supply source 6 through a gas supply pipeline. In this embodiment, by blowing inert gas with a large specific gravity such as argon through the top blowing pipe 7, some harmful gases above the molten metal in the refining container, such as hydrogen, oxygen and nitrogen, can be driven out and discharged from the refining container with the argon flow, thereby forming a protective gas layer on the surface of the molten metal, creating a relatively inert environment in the refining container, preventing the molten metal from reacting with hydrogen, oxygen, nitrogen and the like in the air at high temperature and being contaminated, thereby improving the purity and quality of the molten metal.

[0051] See also Figure 1 As a sub-embodiment of the above-mentioned embodiment, the gas supply pipeline connected to the quick-change blowing and stirring pipe 2 and the gas supply pipeline connected to the top blowing pipe 7 are respectively connected to the gas control device 5, and the gas control device 5 is used to independently regulate the gas flow and gas pressure entering the quick-change blowing and stirring pipe 2 and the top blowing pipe 7. By independently regulating the gas flow and pressure of the quick-change blowing and stirring pipe 2 and the top blowing pipe 7 by the gas control device 5, precise control of the refining process can be achieved to meet the requirements of different refining processes. The air outlet of the top blowing pipe 7 can be designed to be consistent with the rotation direction of the cover plate 1 and tilted downward.

[0052] See also Figure 3As another embodiment, a mounting groove 102 extending from the edge to the center is provided on the cover plate 1, and the top of the quick-change air-blowing stirring tube 2 is inserted into the mounting groove 102 and fixedly connected to the cover plate 1 through a connecting piece. In this embodiment, the quick-change air-blowing stirring tube 2 is fixedly installed with the cover plate 1 by cooperating with the mounting groove 102. The adoption of this technical solution facilitates the installation and position adjustment of the quick-change air-blowing stirring tube 2 to meet the needs of different refining container sizes and refining requirements.

[0053] See also Figure 2 As a sub-embodiment of the above-mentioned embodiment, the upper end surface of the cover plate 1 is covered with a heat insulating pad 101. In this embodiment, the heat insulating pad 101 covers the mounting groove 102 and the cover plate 1, which is beneficial to heat preservation of the molten metal in the refining container 9 and reduces the heat transfer to the outside, protecting the equipment above the cover plate 1; it is beneficial to reduce the escape of inert gas such as argon blown into the top blowing pipe 7, and stabilize the inert gas atmosphere in the refining container 9.

[0054] The insertable stirring and blowing system for metal refining of the present invention can be applied to various refining containers. Figure 8 is a schematic diagram of the present invention applied to a medium frequency melting furnace, Fig. 9 It is a schematic diagram of the present invention applied to a ladle.

[0055] See also Figure 10-11 As another embodiment, this embodiment integrates a refining agent conveying mechanism 8 on the basis of the above embodiment, which is used to inject refining agent into the molten metal before air blowing refining. The refining agent conveying mechanism 8 includes a side bracket 801 connected to the lifting and rotating mechanism 4, the front end of the side bracket 801 is connected to a vertical lifting device 802, the moving end of the vertical lifting device 802 is connected to a refining agent conveying rod 803, the refining agent conveying rod 803 is a hollow tube with a refractory material coated on the outside, and the refining agent conveying rod 803 is connected to the refining agent feeding device 804 through a pipeline. When in use, the operator can adjust the position and depth of the refining agent conveying rod 803 by controlling the movement of the lifting and rotating mechanism 4 and the vertical lifting device 802 according to the requirements of the refining process; at the same time, the refining agent feeding device 804 will convey the refining agent to the refining agent conveying rod 803 according to a predetermined program, and inject it into the molten metal in the refining container 9. After the refining agent is filled, the refining agent conveying rod 803 is lifted by the vertical lifting device 802, and then the lifting and rotating mechanism 4 rotates to make the cover plate 1, the quick-change blowing and stirring pipe 2 correspond to the refining container 9, and the subsequent stirring and blowing refining process is carried out.

[0056] The above contents are merely examples and explanations of the structure of the present invention. The technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the present invention or exceed the scope defined by the claims, they should all fall within the protection scope of the present invention.

Claims

1. An insertable stirring and blowing system for metal refining, characterized in that: It comprises a cover plate (1), a quick-change air blowing and stirring tube (2), a rotary drive mechanism (3), and a lifting and rotating mechanism (4); The quick-change air blowing stirring pipe (2) comprises an air permeable portion (202) and more than one air blowing pipe segment (201), each air blowing pipe segment (201) being an independent unit, the air blowing pipe segment (201) comprising a heat-resistant steel pipe (2011) and a refractory material layer (2012) wrapped around the heat-resistant steel pipe (2011), an extended connecting column (2013) being provided at one end of the heat-resistant steel pipe (2011), and an embedding groove (2014) matching the connecting column (2013) being provided at the other end, adjacent air blowing pipe segments (201) being detachably connected through the matching of the connecting column (2013) and the embedding groove (2014), the air permeable portion (202) comprising an air permeable material made of a high temperature resistant and good air permeability A vent body (2021), wherein a connection seat (2022) is provided on the vent body (2021) and is detachably connected to a groove (214) or a connection column (213) on the air blowing pipe section (201); the vent body (202) is detachably connected to the air blowing pipe section (201) at the end; refractory cement (204) is provided at the joints where adjacent air blowing pipe sections (201) are connected and at the joints where the vent (202) and the air blowing pipe section (201) are connected for sealing; the upper end of the air blowing pipe section (201) at the top is connected to an air supply pipeline via an air source connector (203); an air cavity (2023) is provided in the vent (202), and the air cavity (2023) is in communication with the connection seat (2022); The cover plate (1) covers the refining container, and one or more quick-change air blowing and stirring tubes (2) are vertically mounted on the cover plate (1); The top of the quick-change air blowing and stirring tube (2) is fixedly connected to the cover plate (1) via a connecting piece, and is connected to an air supply source (6) via an air supply pipeline, so as to blow gas into the molten metal in the refining container; A top air blowing pipe (7) is provided on the lower end surface of the cover plate (1), and the top air blowing pipe (7) is connected to an air supply source (6) via an air supply pipeline; The rotary drive mechanism (3) is connected to the cover plate (1), and drives the cover plate (1) and the quick-change air blowing and stirring tube (2) thereon to rotate; The lifting and rotating mechanism (4) is used to support and drive the cover plate (1) to perform translation and vertical lifting, so that the quick-change air blowing and stirring pipe (2) can be inserted into the molten metal in the refining container.

2. The insertable stirring and blowing system for metal refining as claimed in claim 1, characterized in that: The connection column (2013) and the embedding groove (2014), as well as the connection seat (2022) and the embedding groove (2014) or the connection column (2013) are connected by threaded connection or rotating hook connection.

3. The insertable stirring and blowing system for metal refining as claimed in claim 1, characterized in that: The cross section of the air blowing pipe section (201) is circular, elliptical or polygonal.

4. The insertable stirring and blowing system for metal refining as claimed in claim 1, characterized in that: The gas supply pipeline connected to the quick-change air blowing and stirring pipe (2) and the gas supply pipeline connected to the top air blowing pipe (7) are respectively connected to the gas control device (5), and the gas control device (5) is used to independently control the gas flow rate and gas pressure entering the quick-change air blowing and stirring pipe (2) and the top air blowing pipe (7).

5. The insertable stirring and blowing system for metal refining as claimed in claim 1, characterized in that: The cover plate (1) is provided with a mounting groove (102) extending from the edge to the center, and the top of the quick-change air blowing and stirring tube (2) is inserted into the mounting groove (102) and fixedly connected to the cover plate (1) via a connecting piece.

6. The insertable stirring and blowing system for metal refining as claimed in claim 5, characterized in that: The upper end surface of the cover plate (1) is covered with a heat insulation cushion layer (101).

7. The insertable stirring and blowing system for metal refining as claimed in claim 1, characterized in that: The invention also comprises a refining agent conveying mechanism (8), wherein the refining agent conveying mechanism (8) comprises a side bracket (801) connected to the lifting and rotating mechanism (4), the front end of the side bracket (801) is connected to a vertical lifting device (802), the movable end of the vertical lifting device (802) is connected to a refining agent conveying rod (803), the refining agent conveying rod (803) is a hollow tube with a refractory material coated on the outside, and the refining agent conveying rod (803) is connected to a refining agent feeding device (804) through a pipeline.

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