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Method for smelting ash iron by using cupola furnace

A cupola and gray iron technology, applied in manganese ore reduction, silicon carbide decomposition and silicon increase, iron ore fields, can solve the problems of waste of resources, high cost, greenhouse gases, etc.

Inactive Publication Date: 2012-09-19
乔永刚
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most other foundries purchase raw and auxiliary materials such as pig iron, coke, slagging materials, refractory materials, etc., and then go through cupola or electric furnace smelting or cupola plus electric furnace dual smelting. FeSi, FeMn are added during the process. Adjusting the composition of ferroalloys, this process (sintering or pelletizing + smelting + smelting) is a serious waste of resources, large emissions of greenhouse gases and pollutants, and high costs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] According to the mass percentage of raw materials: 70% iron ore powder; 10% coke powder; 15% dolomite powder; 3% fluorite;

[0030] Raw materials in terms of mass percentage: 66% of manganese ore powder, 9% of coke powder, 2% of silicon carbide, 2% of limestone powder, 13% of dolomite powder, 3% of fluorite, 4% of bentonite and 1% of water are mixed evenly and formed into manganese ore balls ;

[0031] According to the mass percentage: 80% of iron ore balls, 5% of manganese ore balls, and 15% of scrap steel, participate in cupola smelting and charging to produce HT250 raw iron liquid;

[0032] First mix iron ore balls and manganese ore balls to form mixed ore balls and then participate in smelting;

[0033] The charging of the cupola smelting is that the bottom coke is first loaded, wherein the thickness of the bottom coke h=(1.5-2.3)d (d is the inner diameter of the cupola);

[0034] After installing the bottom coke, install layer coke→mixed ore balls→scrap steel, wh...

Embodiment 2

[0037] 63% iron ore powder; 9% coke powder; 15% dolomite powder; 3% fluorite; 4% bentonite; 2% limestone powder; Other methods are the same as in Embodiment 1.

Embodiment 3

[0039] 70% iron ore powder; 10% coke powder; 15% dolomite powder; 3% fluorite;

[0040] Manganese ore powder 70%; coke powder 10%; dolomite powder 15%; fluorite 3%; palido 0.05%

[0041] According to mass percentage: 90% of iron ore balls, 3% of manganese ore balls, and 7% of scrap steel, participate in cupola smelting and charging to produce HT200 crude iron liquid; other methods are the same as in Embodiment 1.

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Abstract

The invention discloses a method for smelting ash iron by using a cupola furnace, and belongs to reduction of iron ore and manganese ore. The raw materials comprise the following materials in percentage by mass: 0-70 percent of iron ore powder, 0-60 percent of manganese ore powder, 0-10 percent of silicon carbide, 5-15 percent of reducing agent, 0-10 percent of limestone powder, 5-15 percent of dolomite powder, 1-5 percent of fluorite, 0-5 percent of adhesive, 0-5 percent of water and 0-35 percent of scrap steel. According to the method, a technological line is shortened, so that the aims of reducing transportation steps, saving power, keeping coke energy greater than 35 percent, reducing production cost per tone by over 30 percent and reducing greenhouse gas and pollutant emission by over 30 percent are fulfilled.

Description

Technical field: [0001] The invention belongs to the reduction of iron ore and manganese ore, and the decomposition of silicon carbide to increase silicon. Mainly used in casting field. Background technique: [0002] There are only a few large-scale foundries in my country's foundry technology industry that use blast furnaces to smelt iron ore to obtain pig iron liquid, then desulfurize, and adjust the composition by raising the temperature of the electric furnace to directly produce gray iron castings. Most other foundries purchase raw and auxiliary materials such as pig iron, coke, slagging materials, refractory materials, etc., and then go through cupola or electric furnace smelting or cupola plus electric furnace dual smelting. FeSi, FeMn are added during the process. Adjusting the composition of ferroalloys, this process (sintering or pelletizing + smelting + smelting) is a serious waste of resources, large emissions of greenhouse gases and pollutants, and high costs. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B13/00
Inventor 乔永刚段宜旺费智勤
Owner 乔永刚
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