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Vanadium extraction converter and top-bottom combined blowing method

A technology for converters and top-blown oxygen lances, applied in the manufacture of converters, etc., can solve problems such as inability to achieve large flow bottom blowing, shortened life, easy to corrode, etc., to avoid serious reduction in life, reduce corrosion, fully uniform and rapid stirring Effect

Active Publication Date: 2021-03-16
CENT IRON & STEEL RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of the above analysis, the present invention aims to provide a vanadium extracting converter and top-bottom combined blowing method to solve the problem that the existing vanadium extracting converter guard brick is easy to corrode due to the acid slag produced in the furnace, and its life is shortened at high temperature, which cannot The problem of realizing large flow bottom blowing

Method used

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Embodiment 1

[0074] The invention relates to a vanadium extraction converter and a top-bottom compound blowing method.

[0075] The bottom blowing element consists of three layers of coaxial sleeves, the inner pipe is fed with nitrogen, the methane gas is passed between the inner wall of the middle pipe and the outer wall of the inner pipe, and the nitrogen gas is passed between the inner wall of the outer pipe and the outer wall of the middle pipe. The difference between the inner diameter of the outer tube and the outer diameter of the middle tube ΔD 1 =4mm, the difference between the inner diameter of the middle tube and the outer diameter of the inner tube ΔD 2 = 4mm, the inner diameter of the inner tube ΔD 3 = 6mm. Outer tube diameter D1 = 26mm, wall thickness 2mm; middle tube outer diameter D2 = 18mm, wall thickness 2mm; inner tube outer diameter D3 = 10mm, wall thickness 2mm. The corresponding bottom blowing flow rate is: outer tube 8Nm 3 / h·t, middle tube 0.8Nm 3 / h·t, inner t...

Embodiment 2

[0083] The invention relates to a vanadium extraction converter and a top-bottom compound blowing method.

[0084] The bottom blowing element consists of three layers of coaxial sleeves, the inner pipe is fed with nitrogen, the methane gas is passed between the inner wall of the middle pipe and the outer wall of the inner pipe, and the nitrogen gas is passed between the inner wall of the outer pipe and the outer wall of the middle pipe. Nitrogen gas is passed between the inner wall of the outer tube and the outer wall of the middle tube. The difference between the inner diameter of the outer tube and the outer diameter of the middle tube ΔD 1 =5mm, the difference between the inner diameter of the middle tube and the outer diameter of the inner tube ΔD 2 = 3mm, the inner diameter of the inner tube ΔD 3 = 4 mm. Outer tube diameter D1 = 24mm, wall thickness 2mm; middle tube outer diameter D2 = 15mm, wall thickness 2mm; inner tube outer diameter D3 = 8mm, wall thickness 2mm. T...

Embodiment 3

[0092] The invention relates to a vanadium extraction converter and a top-bottom compound blowing method.

[0093] The bottom blowing element consists of three layers of coaxial sleeves, the inner pipe is fed with nitrogen, the methane gas is passed between the inner wall of the middle pipe and the outer wall of the inner pipe, and the nitrogen gas is passed between the inner wall of the outer pipe and the outer wall of the middle pipe. Nitrogen gas is passed between the inner wall of the outer tube and the outer wall of the middle tube. The difference between the inner diameter of the outer tube and the outer diameter of the middle tube ΔD 1 =6mm, the difference between the inner diameter of the middle tube and the outer diameter of the inner tube ΔD 2 =6mm, the inner diameter of the inner tube ΔD 3 = 4 mm. Outer tube diameter D1 = 28mm, wall thickness 2mm; middle tube outer diameter D2 = 18mm, wall thickness 2mm; inner tube outer diameter D3 = 8mm, wall thickness 2mm. Th...

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Abstract

The invention relates to a vanadium extraction converter and a top-bottom combined blowing method, and belongs to the technical field of vanadium extraction converter equipment. The problems that in the prior art, vanadium extraction converter protective bricks are prone to being corroded due to acid slag generated in a converter, the service life is shortened at high temperature, and large-flow bottom blowing cannot be realized are solved. A vanadium extraction converter bottom blowing element involved in the vanadium extraction converter comprises a bottom blowing protective brick and a three-layer coaxial sleeve pipe, the three-layer coaxial sleeve pipe comprises an inner pipe, a middle pipe and an outer pipe, inert gas is introduced into the inner pipe, crackable gas is introduced intothe middle pipe, and inert gas is introduced into the outer pipe. A top blowing oxygen lance is provided with n main holes which are uniformly distributed and is provided with m auxiliary holes, theauxiliary holes are positioned on the surface where the main holes are positioned and are uniformly distributed between the adjacent main holes, n=3-6, and m=n or 2n. Large-flow bottom blowing of thevanadium extraction converter in the vanadium-containing iron ore smelting process is achieved.

Description

technical field [0001] The invention relates to the technical field of vanadium-extracting converter equipment, in particular to a vanadium-extracting converter and a top-bottom combined blowing method. Background technique [0002] Top-bottom combined blowing is a revolutionary technology of converter vanadium extraction and steelmaking technology. The use of converter bottom blowing strengthens the reaction kinetic conditions of molten steel in the converter and speeds up the reaction speed. Iron, accelerated oxidation of impurities have produced a significant effect. Oxygen blowing from the top of the converter has a stirring dead zone for the stirring of the molten pool, resulting in uneven composition and temperature of the molten pool, and uneven erosion of the furnace lining, especially when the furnace volume ratio increases in the late stage of the furnace operation. The top-bottom compound blowing process was born in the 1970s. After decades of experiments and pra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C5/35C21C5/46C21C5/48C21C5/36C22B34/22C21C5/44
CPCC21C5/35C21C5/4606C21C5/48C21C5/36C22B34/22C21C5/44
Inventor 赵进宣杨利彬吴伟杨勇李相臣
Owner CENT IRON & STEEL RES INST
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