Deoxidation method for converter smelted steel

A converter smelting and molten steel technology, applied in the field of deoxidation, can solve the problems of high cost, inconvenient operation, and poor deoxidation effect, and achieve the effect of convenient construction and operation, low deoxidation cost and good deoxidation effect

Active Publication Date: 2015-10-21
PANGANG GRP PANZHIHUA STEEL & VANADIUM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The above-mentioned several deoxidation methods are either too expensive, or very inconvenient to operate, and the deoxidation effect is insufficient.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Aiming at 120 tons of converter smelting, the implementation of a composite deoxidation method for molten steel is as follows:

[0026] (1) Tapping after converter blowing ends, when the molten steel level reaches 1 / 5 of the ladle height, add carburant 96kg in the ladle, the C content of the carburant is 92%, and the particle size is 5mm;

[0027] (2) Continue tapping after the recarburizer is added to the ladle. When the molten steel level reaches 1 / 3 of the ladle height, add 210kg of silicon-manganese alloy into the ladle. The Si content in the silicon-manganese alloy is 18%, and the Mn content is 68. %, particle size is 30mm;

[0028] (3) After silicon-manganese alloys are all added to the molten steel, 305kg of ferrosilicon and 685kg of ferromanganese are added successively in the ladle;

[0029] (4) After tapping, open the bottom of the ladle to blow argon, adjust the argon blowing flow rate to 100NL / min, blow argon for 3 minutes, feed 100m of aluminum wire into t...

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PUM

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Abstract

The invention discloses a deoxidation method for converter smelted steel, and belongs to the technical field of metallurgical production processes and methods. The deoxidation method for converter smelted steel is relatively low in deoxidation cost, convenient to construct and implement and relatively good in deoxidation effect. The deoxidation method is adopted at the initial converter smelted steel discharge stage. When the liquid level in a steel ladle reaches 18-22% height of the steel ladle, carburant low in cost and low in deoxidizing capacity is adopted for deoxidation; when the liquid level in the steel ladle is increased to be 30-35% the height of the steel ladle, manganese alloy moderate in cost and relatively strong in deoxidation capacity is adopted for deoxidation, and then steel grade alloy control is carried out; after converter smelted steel is completely discharged out of a converter, bottom argon blowing is carried out on the steel ladle not shorter than 3 min; an aluminum wire for deoxidation with the length of 80-150 m is fed into the steel ladle according to the final C content in the converted smelted steel. Accordingly, the converter smelted steel is deoxidized one time.

Description

technical field [0001] The invention relates to a deoxidation method, in particular to a deoxidation method for molten steel smelted in a converter, and belongs to the technical field of metallurgical production techniques. Background technique [0002] Converter smelting is a process of blowing oxygen into the molten pool to reduce carbon. The molten steel after converter smelting contains a large amount of free oxygen. During the tapping process, the free oxygen in molten steel needs to be removed and alloyed to produce molten steel that meets the requirements of continuous casting. . Commonly used molten steel deoxidation methods include diffusion deoxidation, precipitation deoxidation and vacuum carbon deoxidation. Among them, the precipitation deoxidation method is adopted in the tapping process of the converter, that is, a deoxidizer such as aluminum-iron, silicon-calcium-barium, etc. is added to the ladle during the tapping process, and it reacts with oxygen in molte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C7/06
Inventor 黄德胜郭奠荣杨森祥张先胜李平凡李锡福解明科
Owner PANGANG GRP PANZHIHUA STEEL & VANADIUM
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