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Method for reducing oxygen consumption of semisteel steelmaking converter

A technology of steelmaking converter and consumption, which is applied in the field of metallurgy, can solve the problem of high oxygen consumption in semi-steelmaking, achieve significant benefits and reduce oxygen consumption

Inactive Publication Date: 2019-12-03
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem solved by the invention is that the consumption of oxygen in semi-steelmaking is large

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The condition of semi-steel into furnace is temperature 1310℃, C: 4.25%, Si: 0.011%, Mn: 0.014, P: 0.066%, S: 0.022%.

[0030] 200t converter smelting, after the converter is mixed with 220t molten iron, 12kg / t steel of active lime, 13kg of high magnesium lime and 10kg / t steel of acidic composite slagging agent are added into the furnace at the same time of blowing. The position of the basic gun is 1.4-2m, the position of the blowing gun is 1.4m-1.8m, the position of the blowing gun is 2m to prevent the gun from burning, and the position of the carbon pulling gun is 1.4m to ensure that the slag has good fluidity, so that the slag can be melted early and more Dephosphorize and protect the furnace lining. In the present invention, the lance position of the oxygen lance refers to the distance from the end of the nozzle of the oxygen lance nozzle to the liquid surface of the molten pool. Control the basicity of slag at the end point between 3-4, and when the oxygen blowing...

Embodiment 2

[0032] The condition of semi-steel into furnace is temperature 1320℃, C: 4.35%, Si: 0.010%, Mn: 0.024, P: 0.056%, S: 0.028%.

[0033] 200t converter is smelted. After the converter is mixed with 220t molten iron, 11.2kg / t of active lime, 12.3kg of high magnesium lime and 11kg / t of steel are added to the furnace while blowing is started. The distance between the oxygen lance nozzle and the molten pool metal The basic position of the liquid level gun is 1.4-2m, the position of the blowing gun is 1.4m-1.8m, the position of the blowing gun is 2m, to prevent the gun from burning, and the position of the carbon pulling gun is 1.4m to ensure that the molten slag has good fluidity and to dissolve the slag early. , More dephosphorization and protection of furnace lining. In the present invention, the lance position of the oxygen lance refers to the distance from the end of the nozzle of the oxygen lance nozzle to the liquid surface of the molten pool. Control the basicity of slag at t...

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Abstract

The invention relates to a method for reducing oxygen consumption of a semi-steel steelmaking converter, and belongs to the technical field of steelmaking. The invention solves the technical problem of high oxygen consumption in semisteel steelmaking. According to the technical scheme, the method for reducing the oxygen consumption of the semi-steel steelmaking converter comprises the steps that after semi-steel is added into the converter, active lime, high-magnesium lime and ferrosilicon are added, meanwhile, blowing is conducted through oxygen supply of an oxygen lance and bottom blowing gas supply, and gas of the bottom blowing gas supply comprises N2, CO2 and Ar. By changing and controlling the converter bottom blowing gas and the bottom blowing mode, the oxygen consumption of the semi-steel steelmaking converter can be reduced.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a method for reducing the oxygen consumption of a semi-steel steelmaking converter. Background technique [0002] my country is a big country of vanadium-titanium magnetite, with rich resources of vanadium-titanium magnetite. Domestic iron and steel enterprises such as Panzhihua Iron and Steel, Chenggang, Kunming Iron and Steel, and Weiyang Iron and Steel all use vanadium-titanium magnetite for smelting. The molten iron obtained by extracting vanadium from vanadium-titanium magnetite through the converter is called semi-steel for short. Compared with ordinary molten iron steelmaking, semi-steel steelmaking has insufficient heat source because the Si content in semi-steel is traces and the C content is lower than ordinary molten iron. Therefore, semi-steel steelmaking needs to add SiO 2 , FeO and Fe 2 o 3 Composite slag of other substances, the post-smelting cont...

Claims

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Application Information

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IPC IPC(8): C21C5/35C21C5/28
CPCC21C5/28C21C5/35
Inventor 陈路
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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