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Method for smelting vanadium-contained alloy steel through vanadium pentoxide instead of vanadium alloy

A technology of vanadium pentoxide and alloy steel, which is applied to the improvement of process efficiency, etc., can solve the problems of poor stability of reduction reaction and incomplete reduction of high-valent vanadium, so as to improve the comprehensive recovery rate, improve the utilization rate of vanadium resources, and promote effect of transformation

Inactive Publication Date: 2020-02-28
CHENGDE JIANLONG SPECIAL STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the above method, calcium vanadate is first added and then the reducing agent is added, the stability of the reduction reaction is poor, and the phenomenon of incomplete reduction of high-valent vanadium is prone to occur.

Method used

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  • Method for smelting vanadium-contained alloy steel through vanadium pentoxide instead of vanadium alloy

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Embodiment 1

[0039] This embodiment provides a method for smelting vanadium-containing alloy steel by replacing vanadium pentoxide with vanadium pentoxide, the method comprising:

[0040] Add 200kg of refining slag and 200kg of lime to 70t of molten steel, then add 150kg of aluminum for deoxidation, add a mixture of flake vanadium pentoxide and aluminum to the deoxidized molten steel, the flake vanadium pentoxide and aluminum The mass ratio of the vanadium-containing alloy steel is 1:0.5, and argon is blown to the bottom of the ladle for 2.5 minutes after alloying, and the argon blowing intensity is 0.35MPa, and the vanadium-containing alloy steel is obtained after refining and continuous casting.

Embodiment 2

[0042] In this embodiment, a method for smelting vanadium-containing alloy steel with vanadium pentoxide instead of vanadium alloy, except that the mass ratio of the flake vanadium pentoxide to aluminum is 1:0.4, other conditions are the same as in Example 1 same.

Embodiment 3

[0044] In this embodiment, a method for vanadium pentoxide to replace vanadium alloy to smelt vanadium-containing alloy steel, except that the mass ratio of the flaky vanadium pentoxide to aluminum is 1:0.6, other conditions are the same as in Example 1 same.

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Abstract

The invention provides a method for smelting vanadium-contained alloy steel through vanadium pentoxide instead of vanadium alloy. The method comprises the steps that a mixture of flake vanadium pentoxide and aluminum is added into molten steel after deoxygenation, after alloying, bottom argon blowing is carried out on a steel ladle, and after refining and continuous casting, the vanadium-containedalloy steel is obtained. The total yield of vanadium in the method is improved by about 15% relative to the traditional technology, the whole process is obvious in energy-saving and material-saving effect, the method meets the development direction of energy saving, consumption reducing, and circular low carbon in the iron and steel industry, and the method has the important significance in promoting vanadium resource efficient use and vanadium microalloying steelmaking technology development.

Description

technical field [0001] The invention belongs to the field of alloy steel preparation, and relates to a method for preparing a vanadium-containing alloy, in particular to a method for smelting vanadium-containing alloy steel by substituting vanadium pentoxide for vanadium alloy. Background technique [0002] Vanadium is a very important alloying element in steel production, known as the metal "vitamin". Adding vanadium to steel can significantly improve the performance of steel. Practice has shown that adding 0.1% vanadium to structural steel can increase the strength by 10-20%, reduce the structural weight by 15-25%, and reduce the cost by 8-10%. If high-strength steel containing vanadium is used, the weight of the metal structure can be reduced by 40-50%, and the cost is 15-30% lower than that of ordinary structural steel. In recent years, the output of vanadium-containing steel in China has continued to increase, and the variety has continued to increase, especially in c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C7/00C21C7/076C21C7/06C21C7/072
CPCC21C7/0006C21C7/06C21C7/072C21C7/076Y02P10/20
Inventor 周胜刚王雪原曹娜李澍任国良
Owner CHENGDE JIANLONG SPECIAL STEEL