Method for reducing auxiliary material consumption of electric furnace oxidation method

A technology of auxiliary materials and electric furnace, which is applied in the field of electric furnace oxidation steelmaking to reduce the consumption of auxiliary materials in electric furnace oxidation, can solve the problems of excessive consumption of auxiliary materials, achieve the effects of expanding the flow range, improving utilization rate, and increasing the reaction speed of slag and gold

Inactive Publication Date: 2021-06-25
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is the problem that the existing electric furnace oxidation method consumes too many auxiliary materials in steelmaking

Method used

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  • Method for reducing auxiliary material consumption of electric furnace oxidation method

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Embodiment

[0033] This embodiment provides two groups of techniques for smelting steel using the method of the present invention, such as examples 1 and 2; simultaneously, a group of techniques for using the traditional electric furnace oxidation method for bottomless blowing of the same kind of steel is provided, such as comparative example 3, and the specific smelting process includes Follow the steps below:

[0034] 1. Leave a furnace for smelting steel in the electric furnace, then add auxiliary materials and scrap steel materials into the furnace, and melt the materials after electrifying the furnace, and add carbon powder during the melting process of the materials, and blow oxygen into the furnace at the same time, the specific process parameters As shown in Table 1.

[0035] Table 1 EAF steelmaking process parameters

[0036]

[0037] 2. Examples 1 and 2, the bottom blowing gas mode is used in the smelting process, and N is used when the blowing starts to 1 / 3 stage 2 , the c...

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Abstract

The invention discloses a method for reducing auxiliary material consumption of an electric furnace oxidation method, and belongs to the technical field of metallurgy. A blowing process is additionally arranged after a melting process of a traditional electric furnace oxidation method, and the blowing process comprises the steps that a bottom blowing gas mode is adopted in the smelting process, N2 blowing is adopted from the beginning of blowing to the 1/3 stage, CO2 blowing is adopted from the 1/3 stage to the 2/3 stage of blowing, and CO2 and Ar mixed gas blowing is adopted from the 2/3 stage of blowing to the beginning of tapping. In the blowing process, through the stirring effect of bottom blowing gas, the circulating flowing speed of molten steel in an electric furnace molten pool is increased, the flowing range is expanded, and therefore the uniform mixing time of temperature and components is shortened. Through bottom blowing, flux and auxiliary materials added in all stages of electric furnace smelting are rapidly molten and subjected to slagging, impurities in molten steel are rapidly removed, the utilization rate of the auxiliary materials is increased, and the problem that in the prior art, too many auxiliary materials are consumed through the electric furnace oxidation method is effectively solved.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, relates to steelmaking by an electric furnace oxidation method, and in particular relates to a method for reducing the consumption of auxiliary materials in the electric furnace oxidation method. Background technique [0002] Adding auxiliary materials in electric furnace steelmaking is a very important process. The auxiliary materials added in general industrial production include lime, fluorite, refractory materials, etc. Among them, lime is the main flux used in steelmaking to remove S, P, etc. from molten steel. Harmful impurities, improve and ensure product quality, and can increase temperature hit rate and productivity, especially for smelting special steel and high-quality steel is very important. Fluorite is a commonly used flux, and its main component is CaF 2 , which has a low melting point, can make CaO and 2CaO Si0 which hinders the dissolution of lime 2 The melting point of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C5/52
CPCC21C5/527Y02P10/20
Inventor 陈路郑昊青王建周伟
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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