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Method for producing low aluminium silicon killed steel with converter by deoxidation of silicon alloy

A low-silicon-aluminum-killed steel and alloy technology, applied in the field of metallurgy, can solve the problems of large flocculation probability of the caster, high alloy cost, and large amount of aluminum alloy, so as to reduce the cost of deoxidized alloy, reduce the labor intensity of workers, and avoid The effect of production accidents

Active Publication Date: 2018-03-13
ANGANG STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing problems are: (1) The yield of deoxidized aluminum is unbalanced, the final product has a high Al2O3 content, the probability of flocculation in the casting machine is high, and the quality risk is high; (2) The amount of aluminum alloy is large, and the cost of the alloy is high
There is an imbalance in the yield of deoxidized aluminum alloy, and the final product Al 2 o 3 High content, high probability of casting machine flocculation, high quality risk, large amount of aluminum alloy, high alloy cost and many other problems

Method used

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  • Method for producing low aluminium silicon killed steel with converter by deoxidation of silicon alloy
  • Method for producing low aluminium silicon killed steel with converter by deoxidation of silicon alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] When the converter with a nominal volume of 100t produces low-silicon aluminum-killed steel, the tapping volume is 92t.

[0029] Use the following method to deoxidize the alloy in the converter, and at the same time change the original LF furnace treatment process so that the molten steel enters the station and is not killed, and the molten steel, especially the top slag, still has strong oxidation. After entering the LF furnace, blow argon and stir for 3 minutes to make the silicon component in the molten steel react with the FeO in the top slag. It can achieve the effect of reducing the risk of flocculation in the casting machine, reducing the cost of deoxidized alloy, and reducing the quality risk.

[0030] The method for producing low-silicon aluminum-killed steel by deoxidation of silicon-based alloys is as follows:

[0031] (1) Only silicon-based alloys are added to the converter, and the amount of alloys added is shown in Table 3;

[0032] table 3:

[0033] ...

Embodiment 2

[0048] When a converter with a nominal volume of 150t produces low-silicon aluminum-killed steel, the tapping volume is 132t.

[0049] Use the following method to deoxidize the alloy in the converter, and at the same time change the original LF furnace treatment process so that the molten steel enters the station and is not killed, and the molten steel, especially the top slag, still has strong oxidation. After entering the LF furnace, blow argon and stir for 3 minutes to make the silicon component in the molten steel react with the FeO in the top slag. It can achieve the effect of reducing the risk of flocculation in the casting machine, reducing the cost of deoxidized alloy, and reducing the quality risk.

[0050] The method for producing low-silicon aluminum-killed steel by deoxidation of silicon-based alloys is as follows:

[0051] (1) Only silicon-based alloys are added to the converter, and the amount of alloys added is shown in Table 5;

[0052] table 5:

[0053] ...

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Abstract

The invention relates to a method for producing low aluminium silicon killed steel with a converter by deoxidation of silicon alloy. Ferrosilicon and manganese silicon alloy are deoxidized with the converter in order to produce the low aluminium silicon killed steel; a ferrosilicon and manganese silicon alloy addition scheme is carried out; an LF converter usage process is optimized; and an LF converter desulphurization process is improved. The low-aluminium silicon killed steel production with the converter is changed into a semi-boiling steel tapping mode, flocculating flow risk of a castingmachine is reduced, alloy deoxidation cost is greatly reduced, quality risk is reduced, labour intensity of workers is reduced, and generation of spraying is prevented and production accidents are avoided.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to a production process for steel-making low-silicon-aluminum killed steel. Background technique [0002] The aluminum-containing killed steel with Si<0.03% is low-silicon-aluminum-killed steel. The production of low-silicon-aluminum-killed steel in the steelmaking field usually adopts conventional production processes: pre-deoxidation of aluminum-based alloys in the converter tapping process → LF top slag modification, Final deoxidation of molten steel, calcium treatment of molten steel → casting machine, the use of silicon-based alloys is strictly prohibited in the entire production process. The existing problems are: (1) The yield of deoxidized aluminum is unbalanced, the final product has a high content of Al2O3, the probability of flocculation in the casting machine is high, and the quality risk is high; (2) The amount of aluminum alloy is large, and the cost of the alloy...

Claims

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Application Information

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IPC IPC(8): C21C5/28C21C7/00C21C7/06C21C7/064
CPCC21C5/28C21C7/0056C21C7/06C21C7/064
Inventor 王晗桐姚伟智梅雪辉李泽林臧绍双许海亮
Owner ANGANG STEEL CO LTD
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