Large steelmaking converter shell

Abstract

A large steelmaking converter shell relates to the technical field of converter steelmaking equipment and comprises a converter shell body, the converter shell body is composed of a conical section, a cylindrical section and a converter bottom section from top to bottom, both the upper end and the lower end of the cylindrical section are provided with ball table transition sections, and the cylindrical section is fixedly connected with the upper conical section and the lower converter bottom section through the ball table transition sections respectively; a tapping hole is formed in a tapping side opening outside the conical section and the adjacent spherical table transition section, the tapping hole is fixed on the conical section through a tapping hole reinforcing ring, a furnace mouth flange is fixed on an upper opening of the conical section, and a cooling water circulating channel is formed in the lower part of the furnace mouth flange and is positioned on the outer conical surface of the conical section; an upper cooling ring pipe and a lower cooling ring pipe of the cooling water circulation channel are respectively connected with an inlet and an outlet of an external circulation cooling water pump; the device is simple in structure, convenient to transport, capable of reducing dynamic load and impact force, easy to install, adjust and maintain, and safe and reliable in operation.

Description

Technical Field

[0001] The utility model relates to the technical field of converter steelmaking equipment, in particular to a large-scale steelmaking converter shell. Background Art

[0002] It is well known that large-scale steelmaking converter equipment is mainly used for the smelting of molten steel in long-process steelmaking workshops. With the large-scale blast furnaces, the output of high-quality molten iron per unit time has increased significantly, and the demand for large-scale converters has also increased accordingly. The upgrading of large-scale oxygen converters can better save energy and reduce emissions, increase metal recovery rates, reduce raw material consumption, improve production efficiency, stabilize product quality, and thus guide the high-quality development of the steel industry.

[0003] The large-scale converter equipment places higher and higher requirements on the reliability and long life of the shell structure of large steel-making converters; the shell structure size of large steel-making converters is getting larger and larger, which brings about the problems of complex product structure, high product cost and difficult transportation; the shell structure of large steel-making converters has poor rigidity, large deformation, prone to quality problems, difficult installation and maintenance, and limits the possibility of further enlargement of steel-making converters. The shell body is the main body of the large steel-making converter and carries the weight of molten steel, refractory materials and itself, so the rigidity and strength are required to be high; therefore, there is a need for a large steel-making converter shell with simple structure, convenient installation and maintenance, high rigidity and strength, and safe and reliable operation. Summary of the invention

[0004] In order to overcome the deficiencies in the background technology, the utility model discloses a large steelmaking converter shell.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions:

[0006] A large steelmaking converter shell comprises a shell body, which is composed of a conical section, a cylindrical section and a furnace bottom section from top to bottom. A spherical transition section is provided at the upper end and the lower end of the cylindrical section. The cylindrical section is fixedly connected with the upper conical section and the lower furnace bottom section through the spherical transition section respectively. A steel outlet is provided on a steel outlet side opening outside the conical section and the adjacent spherical transition section. The steel outlet is fixed to the conical section through a steel outlet reinforcement ring. A furnace outlet flange is fixed to the upper opening of the conical section. A cold plate is provided at the lower part of the furnace outlet flange and on the outer cone surface of the conical section. Cooling water circulation channel, the cooling water circulation channel includes an upper cooling ring pipe, a lower cooling ring pipe and a connecting pipe. A plurality of extension plates are evenly spaced along the circumferential surface of the lower part of the furnace mouth flange. The lower ends of the extension plates are fixed on the outer side of the cone section. The upper cooling ring pipe passes through the through holes on the plurality of extension plates and is fixed by the extension plates. A plurality of connecting pipes are provided, the upper ends of which are connected with the upper cooling ring pipe, and the lower ends are connected with the lower cooling ring pipe fixed at the lower part of the cone section. The upper cooling ring pipe and the lower cooling ring pipe are respectively connected with the inlet and outlet of the external circulating cooling water pump.

[0007] The large steel-making converter shell has Z-direction performance reinforcement plates fixed at the vertical hanging seat positions on both sides of the cylindrical section, and the Z-direction performance reinforcement plates are provided with lifting ears; between the lower part of the cylindrical section and the upper part of the furnace bottom section, multiple Z-direction performance reinforcement plates are arranged at intervals along the circumferential direction, and two vertical connecting plates are arranged at intervals on the plate surface of the Z-direction performance reinforcement plates, and the two connecting plates are provided with corresponding connecting holes.

[0008] The large steel-making converter shell is provided with a reinforcing rib plate between the lower part of the steel outlet and the conical section.

[0009] The large steel-making converter shell is provided with a furnace repair opening on the front side of the conical section.

[0010] The shell of the large steelmaking converter has a lower cooling ring pipe located at the steel outlet with a disconnected structure and does not interfere with the steel outlet. Both ends of the lower cooling ring pipe are sealed ends. The length of the connecting pipe located at the upper part of the steel outlet is preferably not to interfere with the steel outlet. There is an arc pipe at the lower end of the connecting pipe at the upper part of the steel outlet, and both ends of the arc pipe are connected to two adjacent connecting pipes.

[0011] The large steel-making converter shell is provided with a plurality of air holes on the cylindrical section.

[0012] The large steel-making converter shell has a bottom section whose bottom is set as a spherical furnace bottom, and a bottom argon blowing hole is provided at the bottom of the spherical furnace bottom.

[0013] Due to the adoption of the above technical solution, the utility model has the following beneficial effects:

[0014] The large steelmaking converter shell described in the utility model is connected with the external support ring by adopting a lower hanging structure by arranging a plurality of Z-direction performance reinforcing plates on the circumferential surface between the cylindrical section and the furnace bottom section, so that the shell can safely and reliably transmit the load of the shell to the support ring evenly when the shell is in any tilting position, and can adapt to the unequal thermal deformation of the shell and the support ring, and can also ensure that the shell can be correctly positioned in the support ring at any tilting position of the shell without any movement; and because the deformation of the shell reduces the influence of the suspension structure on the converter, the air cooling of the furnace belly can be cancelled, and the weight of the equipment and the corresponding equipment maintenance can be reduced; by arranging a cooling water circulation channel on the outside of the conical section, it is used to strengthen the cooling of the furnace mouth flange, improve the overall cooling effect of the furnace cap, reduce the deformation of the furnace mouth flange, and extend the service life of the water-cooled furnace mouth; compared with the traditional converter shell, the utility model has a simple structure, is convenient to transport, can reduce dynamic load and impact force, is easy to install, adjust and maintain, and is safe and reliable in operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a front structural schematic diagram of the utility model.

[0016] Figure 2 It is a side view of the utility model.

[0017] In the figure: 1. Conical section; 2. Furnace mouth flange; 3. Cylindrical section; 4. Furnace bottom section; 5. Spherical transition section; 6. Spherical furnace bottom; 7. Cooling water circulation channel; 8. Steel outlet reinforcement ring; 9. Steel outlet; 10. Furnace mouth repair; 11. Z-direction performance reinforcement plate. DETAILED DESCRIPTION

[0018] The present invention can be explained in detail through the following embodiments. The purpose of disclosing the present invention is to protect all technical improvements within the scope of the present invention.

[0019] Combined with Figure 1-2 The large steelmaking converter shell comprises a shell body, which consists of a conical section 1, a cylindrical section 3 and a furnace bottom section 4 from top to bottom. A spherical transition section 5 is provided at the upper and lower ends of the cylindrical section 3. The cylindrical section 3 is fixedly connected to the upper conical section 1 and the lower furnace bottom section 4 through the spherical transition section 5 respectively; a steel outlet 9 is provided on the steel outlet side opening outside the conical section 1 and the adjacent spherical transition section 5, and the steel outlet 9 is fixed to the conical section 1 through a steel outlet reinforcement ring 8. A furnace mouth flange 2 is fixed to the upper mouth of the conical section 1, and a cooling water circulation channel 7 is provided at the lower part of the furnace mouth flange 2 and on the outer cone surface of the conical section 1. The cooling water circulation channel 7 comprises an upper cooling ring pipe, a lower cooling ring pipe and a connecting pipe. A plurality of extension plates are evenly spaced along the circumferential surface of the lower part of the furnace mouth flange 2, and the lower ends of the extension plates are fixed on the outer surface of the conical section 1. The upper cooling ring pipe passes through a plurality of The through holes on the extension plate are fixed by the extension plate, and multiple connecting pipes are provided, the upper ends of which are connected with the upper cooling ring pipe, and the lower ends are connected with the lower cooling ring pipe fixed at the lower part of the conical section 1, and the upper cooling ring pipe and the lower cooling ring pipe are respectively connected with the inlet and outlet of the external circulating cooling water pump; the lower cooling ring pipe located at the steel outlet 9 is a disconnected structure, which does not interfere with the steel outlet 9, and both ends of the lower cooling ring pipe are sealed ends. The length of the connecting pipe located at the upper part of the steel outlet 9 is preferably not to interfere with the steel outlet 9, and there is an arc pipe at the lower end of the connecting pipe at the upper part of the steel outlet 9, and both ends of the arc pipe are connected with two adjacent connecting pipes; the cooling water circulation channel 7 is provided to reduce the temperature of the conical section 1, and the cooling ring pipe is installed on the extension plate of the furnace mouth flange 2 for cooling the furnace mouth flange 2, improving the overall cooling effect of the furnace cap, reducing the deformation of the furnace mouth flange 2, and extending the service life of the water-cooled furnace mouth.

[0020] Furthermore, Z-direction performance reinforcement plates 11 are respectively fixed at the vertical hanging seat positions on both sides of the cylindrical section 3, and the Z-direction performance reinforcement plates 11 are provided with lifting ears; between the lower part of the cylindrical section 3 and the upper part of the furnace bottom section 4, multiple Z-direction performance reinforcement plates 11 are spaced apart along the circumferential direction, and two vertical connecting plates are spaced apart on the plate surface of the Z-direction performance reinforcement plate 11, and the two connecting plates are provided with corresponding connecting holes; an external support ring is connected to the connecting holes of the two vertical connecting plates on the Z-direction performance reinforcement plate 11, so that the connecting piece at the lower part of the support ring is inserted between the two vertical connecting plates and fixed by bolts to form a lower hanging structure, and the support ring is fixed to the outside of the cylindrical section 3 for lifting.

[0021] Furthermore, a reinforcing rib plate is provided between the lower part of the steel outlet 9 and the conical section 1, and the provision of the reinforcing rib plate improves the safety of the steel outlet; a furnace repair opening 10 is provided on the front side of the conical section 1 to facilitate maintenance operations.

[0022] Furthermore, a plurality of air holes are provided on the cylindrical section 3 for discharging water vapor.

[0023] Furthermore, the bottom of the furnace bottom section 4 is configured as a spherical furnace bottom 6 , and a bottom argon blowing hole is provided at the bottom of the spherical furnace bottom 6 .

[0024] The large steel-making converter shell of the utility model can be transported in sections during transportation. After being delivered to the destination, the cone section 1, the cylindrical section 3 and the furnace bottom section 4 are welded by welding. The cone section 1 is a cone-shaped structure formed by rolling and welding pressure vessel steel plates. The spherical furnace bottom 6 of the furnace bottom section 4 is non-detachable. The converter shell is a fully welded fixed furnace bottom structure. The furnace bottom is provided with bottom argon blowing holes to ensure that the top and bottom combined blowing process is adopted in the working process. The cone section 1, as a part of the large steel-making converter shell, bears a large heat load. Therefore, a cooling water circulation channel 7 is fixed outside the conical section 1 to reduce its temperature and reduce the thermal deformation of the upper conical section 1. The upper cooling pipe of the cooling water circulation channel 7 is arranged below the furnace mouth flange 2 to strengthen the cooling of the furnace mouth flange 2. The cylindrical section 3 and the furnace bottom section 4 are the main parts for the lower hanging load. The Z-direction performance reinforcement plate 11 is welded on the circumferential surface thereof, and the connecting plate on the Z-direction performance reinforcement plate 11 is fixedly connected with the connecting plate at the bottom of the external support ring to form a lower hanging structure, so that the strength and deformation of the furnace shell and the support ring are reduced. The Z-direction performance reinforcement plate 11 is set to effectively reduce the probability of the furnace shell tearing, effectively improve the stress of the furnace shell, and increase the service life of the furnace shell; the hanging position is located at the lower part of the cylindrical section 3, which can greatly reduce the center of gravity of the furnace shell, and this part has a low temperature and small deformation, which is convenient for production, installation and maintenance, significantly reducing the number of equipment maintenance, effectively extending the service life of the equipment, and improving the safety of the equipment; after the converter is installed, refractory materials need to be laid inside the furnace shell, and then the refractory materials are heated and baked in the furnace, and the moisture inside the refractory materials will be evaporated in the form of water The pressure is relatively high when the water vapor is released in the form of gas. The air holes on the cylindrical section 3 are process holes for exhausting water vapor to the outside, thereby reducing the damage of water vapor pressure to the refractory material. In order to further reduce labor intensity, improve work efficiency, and shorten the furnace repair cycle, a special brick inlet hole is provided on the front side of the furnace on the upper part of the furnace shell to simplify the equipment structure type in the flue and furnace platform area and reduce investment costs. A slide plate slag stopper, a slag stopper rod at the rear of the furnace and a slag monitoring system can also be provided at the steel outlet on the steel outlet side of the upper part of the furnace shell to reduce the amount of slag, increase the alloy recovery rate, and improve the quality of molten steel.

[0025] The parts not described in detail in this utility model are prior art.

[0026] The embodiments selected in this article for the purpose of disclosing the invention of the utility model are currently considered to be suitable, but it should be understood that the utility model is intended to include all changes and improvements of the embodiments that belong to the scope of the present concept and utility model.

Claims

1. A large steelmaking converter shell, comprising a shell body, characterized in that: The furnace shell body consists of a conical section, a cylindrical section and a furnace bottom section from top to bottom. A spherical transition section is provided at the upper and lower ends of the cylindrical section. The cylindrical section is fixedly connected to the upper conical section and the lower furnace bottom section through the spherical transition section. A steel outlet is provided on the steel outlet side opening outside the conical section and the adjacent spherical transition section. The steel outlet is fixed to the conical section through a steel outlet reinforcement ring. A furnace mouth flange is fixed to the upper opening of the conical section. A cooling water circulation channel is provided at the lower part of the furnace mouth flange and on the outer cone surface of the conical section. The cooling The water circulation channel includes an upper cooling ring pipe, a lower cooling ring pipe and a connecting pipe. A plurality of extension plates are evenly spaced along the circumferential surface of the lower part of the furnace mouth flange. The lower ends of the extension plates are fixed on the outer side of the cone section. The upper cooling ring pipe passes through the through holes on the plurality of extension plates and is fixed by the extension plates. A plurality of connecting pipes are provided, the upper ends of which are connected to the upper cooling ring pipe, and the lower ends are connected to the lower cooling ring pipe fixed at the lower part of the cone section. The upper cooling ring pipe and the lower cooling ring pipe are respectively connected to the inlet and outlet of the external circulating cooling water pump.

2. The large steelmaking converter shell according to claim 1 is characterized in that: Z-direction performance reinforcement plates are fixed at the vertical hanging seat positions on both sides of the cylindrical section, and the Z-direction performance reinforcement plates are provided with lifting ears; between the lower part of the cylindrical section and the upper part of the furnace bottom section, multiple Z-direction performance reinforcement plates are arranged at intervals along the circumferential direction, and two vertical connecting plates are arranged at intervals on the plate surface of the Z-direction performance reinforcement plates, and the two connecting plates are provided with corresponding connecting holes.

3. The large steelmaking converter shell according to claim 1 is characterized in that: A reinforcing rib plate is provided between the lower part of the steel outlet and the conical section.

4. The large steelmaking converter shell according to claim 1 is characterized in that: A furnace repair opening is provided on the front side of the conical section.

5. The large steelmaking converter shell according to claim 1 is characterized in that: The lower cooling ring pipe located at the steel outlet is a disconnected structure and does not interfere with the steel outlet. Both ends of the lower cooling ring pipe are sealed ends. The length of the connecting pipe located at the upper part of the steel outlet is preferably not to interfere with the steel outlet. There is an arc pipe at the lower end of the connecting pipe at the upper part of the steel outlet, and both ends of the arc pipe are connected to two adjacent connecting pipes.

6. The large steelmaking converter shell according to claim 1 is characterized in that: A plurality of air holes are provided on the cylindrical section.

7. The large steelmaking converter shell according to claim 1 is characterized in that: The bottom of the furnace bottom section is configured as a spherical furnace bottom, and a bottom blowing argon hole is provided at the bottom of the spherical furnace bottom.

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