Method for direct making steel by converter using iron ore powder and anchracite duff batch briquette

A technology of anthracite powder and iron ore powder, applied in the manufacture of converters, etc., can solve the problems of large power consumption, high energy consumption, and large factory building area, and achieve the effect of small investment and low energy consumption

Inactive Publication Date: 2006-10-25
徐建明
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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

Experimental program
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Embodiment Construction

[0013] Step 1. In the converter, first add anthracite or graphite coal and lime, and then add a mixture of iron ore powder and anthracite powder. Steam, air or oxygen are blown on the top of the furnace, and steam, oxygen or nitrogen are blown on the bottom of the furnace. The gas and powder mixture of anthracite coal powder is blown for 25-35 minutes, and the temperature is raised to 1650-1680°C to make molten steel. The molten steel is tapped into the ladle, and the output of molten steel is 70%-90% of the total amount of molten steel in the converter. , wherein, the parts by weight of each component in the converter are:

[0014] 80-90 parts of iron ore powder

[0015] 5 to 10 parts of anthracite or graphite coal

[0016] 5-7 pieces of lime cubes

[0017] 10-12 parts of anthracite powder,

[0018] The mixture of iron ore powder and anthracite powder is added to the converter twice, and 20-30 parts are added for the first time, and the rest is added after the mixture of i...

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PUM

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Abstract

The invention deals with the method of using the combination of the iron ore powder and the blind mine powder to produce directly the iron and the steel by the converter, the steps are showed below: the step one, firstly, the blind mine block or the black lead mine block are added in the converter, secondly, the combination of the iron ore powder and the blind mine powder is added, the stream, the air or the oxygen are added from the roof, the stream, the oxygen or the azote and the combination of the air and the powder of the blind mine powder are added from the bottom of the stove, the process of blowing and smelting is keep 25-35 minutes, the temperature is promoted to the 1650-1680 to produce the molten iron, the molten iron is added in the ladle, the percentage of the outcome quantity of the molten iron accounts for the 70-90 compared with the overall molten iron; the step two, the blind coal block or the pot lead block, the limestone are added in the converter, then the combination of the iron ore powder and the blind mine powder is added, the step one is executed repeatedly. The invention has many merits such as the low invest and the low energy consuming.

Description

Technical field: [0001] The present invention relates to a steelmaking method. In particular, it relates to a method for directly making steel using a converter using a mixed block of iron ore powder 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 ore blocks 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 for blowing 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 purpose of the present invention is to overcome the above-mentioned shortcomings, and provide a method for direct ste...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C5/28C22B5/10
Inventor 徐建明
Owner 徐建明
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