Method for producing calcium ferrite from iron oxide

A technology of iron oxide and calcium ferrite, applied in the field of metallurgy, can solve the problems of affecting the effect and function of calcium ferrite, affecting the composition of calcium ferrite, consuming large resources, etc., achieving good dephosphorization conditions, saving dosage, and speed of slagging fast effect

Inactive Publication Date: 2014-08-06
ZHENGZHOU WHALE SPECIAL MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Calcium ferrite is the main material for purifying molten steel in the metallurgical industry. The traditional calcium ferrite is made by using iron oxide and bauxite as the main raw materials and using graphite electrodes for electrofusion. This traditional iron The production method of calcium ferrite, because graphite contains more carbon, in the process of electrode electric melting, there will be different degrees of carbon decomposition, entering into calcium ferrite, affecting the composition of calcium ferrite, affecting the actual effect and quality of calcium ferrite effect
On the other hand, because iron oxide is mainly used, the resource consumption is relatively large, and the cost is relatively high
In the process of steel production in steel plants, iron oxide and steel waste (scrap) are inevitable by-products, and these by-products still contain a large amount of iron. Usually, steel manufacturers discard these iron oxide and steel waste. , Disposal is a great waste of resources, and this iron oxide ash and iron waste (leftovers) will also cause environmental pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The method that utilizes iron oxide to produce calcium ferrite that the present embodiment provides, comprises the following steps:

[0038] 1) Crush and mix raw materials: respectively crush iron oxide, lime and bauxite, the particle size is 0 65%, Cao in lime> 92%, Al in bauxite 2 o 3 >85%;

[0039] 2) Put the mixed materials into the smelting furnace in batches and small batches, and carry out regular and quantitative electric melting under low pressure. The electrode is an iron electrode, and the low voltage is 100v;

[0040] 3) Flow the melted liquid into the abrasive tool for cooling, and the abrasive tool is made of special high temperature resistant material;

[0041] 4) The cooled calcium ferrite finished product can be crushed, screened and packaged.

Embodiment 2

[0043] The method that utilizes iron oxide to produce calcium ferrite that the present embodiment provides, comprises the following steps:

[0044] 1) Crush and mix the raw materials: respectively crush iron oxide, lime and bauxite, the particle size is 0 65%, Cao in lime> 92%, Al in bauxite 2 o 3 >85%;

[0045] 2) Put the mixed materials into the smelting furnace in batches and small batches, and carry out regular and quantitative electric melting under low pressure. The electrode is an iron electrode, and the low voltage is 90v;

[0046] 3) Flow the melted liquid into the abrasive tool for cooling, and the abrasive tool is made of special high temperature resistant material;

[0047] 4) The cooled calcium ferrite finished product can be crushed, screened and packaged.

Embodiment 3

[0049] The method that utilizes iron oxide to produce calcium ferrite that the present embodiment provides, comprises the following steps:

[0050] 1) Crush and mix raw materials: respectively crush iron oxide, lime and bauxite, the particle size is 0 65%, Cao in lime> 92%, Al in bauxite 2 o 3 >85%;

[0051] 2) Put the mixed materials into the smelting furnace in batches and small batches, and conduct regular and quantitative electric melting under low pressure. The electrode is an iron electrode, and the low voltage is 110v;

[0052] 3) Flow the melted liquid into the abrasive tool for cooling, and the abrasive tool is made of special high temperature resistant material;

[0053] 4) The cooled calcium ferrite finished product can be crushed, screened and packaged.

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PUM

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Abstract

The invention discloses a method for producing calcium ferrite from iron oxide. The method utilizes an iron electrode to realize electric smelting, utilizes the iron electrode to produce calcium ferrite, prevents an additional component from entering into calcium ferrite, improves calcium ferrite purity and realizes better calcium ferrite actual use effects. In steel-making, through use of the calcium ferrite obtained by the method, a slagging rate is fast, dephosphorization efficiency is high, a lime use amount is reduced, fluorine-free steel-making is realized and environmental pollution is reduced.

Description

technical field [0001] The invention relates to the field of metallurgy, in particular to a method for producing calcium ferrite with iron oxide. Background technique [0002] Calcium ferrite is the main material for purifying molten steel in the metallurgical industry. The traditional calcium ferrite is made by using iron oxide and bauxite as the main raw materials and using graphite electrodes for electrofusion. This traditional iron The production method of calcium ferrite, because graphite contains more carbon, in the process of electrode electric melting, there will be different degrees of carbon decomposition, entering into calcium ferrite, affecting the composition of calcium ferrite, affecting the actual effect and quality of calcium ferrite effect. On the other hand, because iron oxide is mainly used, the resource consumption is relatively large, and the cost is relatively high. In the process of steel production in steel plants, iron oxide and steel waste (scrap)...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C7/04
CPCY02P40/40
Inventor 赵法焱
Owner ZHENGZHOU WHALE SPECIAL MATERIALS
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