Adding method of antimony in smelting process of antimony-containing steel

A steel smelting and steel quality technology, which is applied in the field of antimony addition in the smelting process of antimony-containing steel, can solve the problems of antimony not meeting the demand and antimony addition, etc., and achieve the effect of reducing volatilization and good mass transfer conditions

Active Publication Date: 2017-09-19
LAIWU STEEL YINSHAN SECTION CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to overcome the defect that the addition of antimony in the prior art cannot meet the demand and solve the problem of adding antimony to molten steel, the invention provides a method for adding antimony in the smelting process of antimony-containing steel

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] 09CrCuSb alloy steel is smelted in the converter, the nominal tonnage of the converter is 200t. The wall thickness is 2mm, and each steel packaging tank is filled with a mixture of 20kg antimony ingot and aluminum pellets. The mass ratio of antimony alloy and aluminum alloy is 1:1, that is, the steel packaging tank contains 10kg antimony ingot and 10kg aluminum pellets. After sealing the steel packaging tank, heat the steel packaging tank to 700°C by means of gas heating and keep it warm for 0.5 hours. The aluminum particles and antimony ingots in the steel packaging tank are melted, and the aluminum-antimony alloy is heated to a liquid state. Before steel, the steel packaging tank containing liquid aluminum antimony alloy is added to the bottom of the ladle in advance. During the tapping process of the converter, the steel flow impacts the steel packaging tank, the steel packaging tank is melted by molten steel, and the liquid aluminum antimony alloy dissolves into the ...

Embodiment 2

[0039] The converter smelts silicon steel W600. The nominal tonnage of the converter is 200t. Before putting steel in the converter, the aluminum-antimony alloy is heated to a liquid state in advance. The thickness is 5mm, and each steel packaging tank is filled with a mixture of 40kg antimony ingots and aluminum particles. The mass ratio of antimony alloy and aluminum alloy is 4:1, that is, the steel packaging tank contains 32kg antimony ingots and 8kg aluminum particles. After the steel packaging tank is sealed, heat the steel packaging tank to 900°C by means of gas heating and keep it warm for 2 hours. The aluminum particles and antimony ingots in the steel packaging tank are melted, the aluminum-antimony alloy is heated to a liquid state, and steel is placed in the converter. During the process, the canned liquid aluminum-antimony alloy is added to the molten steel in the ladle along with the steel flow, and a total of 3 cans of the aluminum-antimony alloy are added. Both ...

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Abstract

The invention discloses an adding method of antimony in the smelting process of antimony-containing steel. The adding method comprises the steps that an aluminium alloy and an antimony alloy are put into a steel packing tin; then the steel packing tin is heated to 700-900 DEG C through a heating method, and heat preservation is conducted for 0.5-2 h, and thus the two alloys in the packing tin are molten, but the steel packing tin is not molten; in the converter tapping process, the steel packing tin containing the liquid aluminium alloy and the liquid antimony alloy is added into liquid steel in a ladle, the steel packing tin is molten by the liquid steel, and the liquid aluminium alloy and the liquid antimony alloy are fused into the liquid steel; and the mass ratio of the antimony alloy to the aluminium alloy is 1:1-4:1. According to the adding method, volatilization of antimony and antimony compounds can be reduced.

Description

technical field [0001] The invention belongs to the technical field of iron and steel metallurgy, in particular, the invention relates to a method for adding antimony in the smelting process of antimony-containing steel. Background technique [0002] The relative density of antimony is 6.68g / cm 3 , with a melting point of 630°C and a boiling point of 1635°C. Antimony oxide antimony trioxide has a boiling point of 1425°C. Antimony and many of its compounds are toxic, and its mechanism of action is to inhibit the activity of enzymes, and the toxicity of trivalent antimony is greater than that of pentavalent antimony. The symptoms of acute antimony poisoning are also similar to those of arsenic poisoning, mainly causing cardiotoxicity (manifested as myocarditis), but antimony cardiotoxicity may also cause A-S syndrome. It has been reported that the equivalent of 6 grams of antimony potassium tartrate dissolved in an enamel cup caused death after three days. Inhalation of an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C33/06C22C38/60
CPCC22C33/06C22C38/60
Inventor 刘洪银郝帅刘炳俊路峰亓伟伟王孝科孙建卫袁鹏举王奉县
Owner LAIWU STEEL YINSHAN SECTION CO LTD
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