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Method for direct steelmaking using mixture of iron oxide scale and anthracite smalls with electric furnace

A technology of iron oxide scale and anthracite powder, which is applied in the field of steelmaking, can solve the problems of large power consumption, high energy consumption, and large investment, and achieve the effect of small investment and low energy consumption

Inactive Publication Date: 2007-02-07
徐建明
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The factory building of the blast furnace in this method covers a large area, the foundation project is large, the investment is large, the power consumption is large, and the energy consumption is high.

Method used

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Examples

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Embodiment Construction

[0012] Step 1. In the electric furnace, add the mixture of anthracite or graphite coal, lime, and iron oxide scale, and blow the mixture of steam, air or oxygen and anthracite powder into the furnace for 50 to 80 minutes, and the temperature rises. To 1650~1680 ℃, make molten steel, deoxidize and reduce, and tap molten steel, wherein, the feeding weight parts of each component in the electric furnace are:

[0013] 80-90 parts of iron oxide scale

[0014] 5 to 10 parts of anthracite or graphite coal

[0015] 2 to 4 pieces of lime cubes

[0016] 8 to 10 parts of anthracite powder,

[0017] Step 2, continue to add the mixture of anthracite block or graphite coal block, lime block and iron oxide scale in the electric furnace, and repeat the process of step 1.

[0018] In the above embodiment: the size of anthracite block or graphite coal block is 3-8 mm, and the size of lime block is 3-5 mm. The oxide scale is preferably made of stainless steel oxide scale.

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PUM

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Abstract

the invention discloses a direct steel-making method through electric furnace based on ferric oxide and smokeless coal powder, which comprises the following steps: first, adding 5-10% smokeless coal block or graphite coal block and 2-4% lime block and 80-90% ferric oxide and 8-10% smokeless coal powder in the electric furnace; blowing the composition of steam, air or oxygen and smokeless coal powder for 50-80 min; heating to 1650-1680 deg.c to prepare steel water; deoxidizing; second, adding smokeless coal block or graphite coal block and lime as well as ferric oxide in the electric furnace continuously; repeating step 1.

Description

Technical field: [0001] The present invention relates to a steelmaking method. Specifically, it relates to a method for directly making steel by using an electric furnace as a mixture of iron oxide scale and anthracite powder. It belongs to the field of metallurgy technology. Background technique: [0002] Before the present invention was made, the traditional steelmaking method was the blast furnace plus converter steelmaking method: that is, iron oxide scales and coke blocks were first added into the blast furnace, smelted into molten iron at 1350 ° C ~ 1450 ° C, and then put into the converter and blown into steel. . The factory building of the blast furnace in this method occupies a large area, the foundation project is large, the investment amount is large, the power consumption is large, and the energy consumption is high. Invention content: [0003] The object of the present invention is to overcome the above-mentioned disadvantages and provide a method for direc...

Claims

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Application Information

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IPC IPC(8): C21B13/12C22B5/10C21C7/06
Inventor 徐建明
Owner 徐建明
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