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Calculating method for oxygen blowing quantity of electric-arc furnace

A calculation method and electric arc furnace technology, applied in the direction of electric furnace, furnace, furnace type, etc., can solve the problems of overblowing, insufficient oxygen blowing amount, unstable soup composition, etc., and achieve the goal of improving utilization rate and reducing power consumption Effect

Active Publication Date: 2015-07-08
ZHANGJIAGANG POHANG STAINLESS STEEL
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AI Technical Summary

Problems solved by technology

The traditional oxygen blowing method relies on the experience of the operator to judge the amount of oxygen blown in, and the phenomenon of over blowing and insufficient oxygen blowing often occurs, and the composition of the soup is extremely unstable, which also brings many problems to the electric furnace smelting

Method used

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Embodiment Construction

[0022] Specific embodiments of the present invention are described in detail below.

[0023] The calculating method of electric arc furnace oxygen blowing amount according to the present invention, oxygen mainly reacts with Si and C in the electric arc furnace, and chemical reaction is as follows:

[0024] ①Si+O 2 = SiO 2

[0025] ②C+1 / 2O 2 =CO

[0026] Through two chemical reaction equations, the calculation model of oxygen consumption is preliminarily established as follows:

[0027] Si+O 2 = SiO 2

[0028] 28.087g / mol 22.4L / mol

[0029] a x

[0030] x=a÷28.087×22.4L=0.798aL

[0031] C+1 / 2O 2 =CO

[0032] 12.011g / mol 22.4L / mol

[0033] b y

[0034] y=b÷12.011×0.5×22.4L=0.932bL

[0035] The C and Si components in the raw materials not only react with the blown oxygen, but also chemically react with the oxygen in the atmosphere under high temperature and pressure, that is, the natural oxidation rate of C and Si,

[0036] C, Si oxygen demand = theoretical oxygen...

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Abstract

The invention discloses a simple and efficient calculating method for an oxygen blowing quantity of an electric-arc furnace. The oxygen blowing quantity = (raw material charge weight*weight percentage of Si in raw material-melt discharge amount*weight percentage of Si in melt)*0.798*0.4+(raw material charge weight*weight percentage of C in the raw material-melt discharge amount*weight percentage of C in melt)*0.932*(0.5-0.7)+[(raw material charge weight*weight percentage of Si in the raw material- melt discharge amount*weight percentage of Si in melt)*0.798*0.4+(raw material charge weight*weight percentage of C in the raw material-melt discharge amount*weight percentage of C in melt)*0.932*(0.5-0.7)]*0.2, wherein the melt discharge amount= raw material charge weight*casting yield. The method disclosed by the invention has the advantages that the electric consumption is reduced to a great extent, the utilization rate of oxygen is improved, the furnace body is not damaged, so that the energy-saving and cost-reducing effect is realized.

Description

technical field [0001] The invention relates to a method for calculating the oxygen blowing amount of an electric arc furnace. Background technique [0002] In the electric arc furnace smelting process, in order to reduce the C and Si components in the raw materials, it is convenient for the smelting in the next process. At the same time, a certain amount of heat is provided for melting scrap steel, and the method of blowing oxygen at the furnace door is adopted. Due to the difference in the type and composition of raw materials, as well as the composition of the soup produced by different steel types, and the amount of raw materials used in each furnace, the amount of oxygen blown into each furnace is different. The traditional oxygen blowing method relies on the experience of the operator to judge the amount of oxygen blown in, and the phenomenon of overblowing and insufficient oxygen blowing often occurs, and the composition of the soup is extremely unstable, which also ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C5/52
CPCY02P10/20
Inventor 严福伟
Owner ZHANGJIAGANG POHANG STAINLESS STEEL
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