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A kind of vanadium extracting converter and top-bottom combined blowing method

A converter and inner tube technology, used in the manufacture of converters and other directions, can solve the problems of easy corrosion, inability to achieve large flow bottom blowing, shortened life and other problems, and achieve the effect of reducing corrosion, avoiding serious reduction in life, and reducing iron loss.

Active Publication Date: 2022-03-29
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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  • A kind of vanadium extracting converter and top-bottom combined blowing method
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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 double blowing method, which belongs to the technical field of vanadium extraction converter equipment, and solves the problem that the protective bricks of the vanadium extraction converter in the prior art are easily corroded due to acid slag produced in the furnace, and the service life is shortened at high temperature , unable to realize the problem of large flow bottom blowing. The bottom-blowing element of the vanadium extraction converter involved in the present invention includes a bottom-blowing protective brick and a three-layer coaxial sleeve. The three-layer coaxial sleeve includes an inner tube, a middle tube, and an outer tube. The crackable gas is passed through the tube, and the inert gas is passed through the outer tube; the top-blown oxygen lance has n main holes, which are evenly distributed, and m auxiliary holes, which are located on the surface where the main holes are located, and are evenly distributed on the corresponding Between adjacent main holes, n=3-6, m=n or 2n. In the smelting process of vanadium-containing iron ore, the large-flow bottom blowing of the vanadium extraction converter is realized.

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 Patents(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