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Synthesis method for magnesium-iron spinel refractory material by means of electric smelting

A technology of iron spinel and refractory material, which is applied in the synthesis field of fused magnesia iron spinel refractory material, can solve problems such as environmental composition pollution, and achieve the effects of low input cost and good thermal stability

Inactive Publication Date: 2012-06-20
DALIAN QIUHE REFRACTORY MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Magnesia-chromium refractories are widely used in the firing zone of cement rotary kilns because of their good kiln skin and chemical resistance to cement clinker. However, the residual magnesia-chrome bricks contain hexavalent chromium compounds. It is a water-soluble carcinogen and seriously pollutes the environment. For this reason, technicians have been working hard to develop alternative refractory materials with good physical and chemical properties, non-toxic, and non-polluting

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] Example 1 The composition of raw materials is to mix 95% magnesia and 5% iron oxide by mass percentage, melt at a high temperature in a submerged arc furnace at 2800 ℃, and then cool for 90 hours to obtain fused magnesia-iron spinel refractories.

Embodiment 2

[0011] Example 2 The composition of raw materials is to mix 90% magnesia and 10% iron oxide by mass percentage, melt at a high temperature in a submerged arc furnace at 2800 ℃, and then cool for 90 hours to obtain a fused magnesia-iron spinel refractory material.

Embodiment 3

[0012] Example 3 The composition of raw materials is to mix 88% magnesia and 12% iron oxide by mass percentage, melt at a high temperature in a submerged arc furnace at 2800 ℃, and then cool for 90 hours to obtain fused magnesia-iron spinel refractory materials.

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PUM

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Abstract

The invention discloses a synthesis method for a magnesium-iron spinel refractory material by means of electric smelting, which includes the steps of mixing 88-95% of magnesium oxide and 5-12% of iron oxide prior to high-temperature smelting at the high temperature of 2800 DEG C, and cooling for 90 hours so that the material is prepared, wherein the high-temperature smelting is carried out in a submerged arc furnace, and preferably, the content of the magnesium oxide is 95%, and the content of the iron oxide is 5%. The synthesis method for the magnesium-iron spinel refractory material by means of electric smelting has the advantages that raw materials are selected scientifically and reasonably, investment cost is low, energy conservation and environmental protection are realized by using the submerged arc furnace during smelting, and the magnesium-iron spinel refractory material is high in heat stability, decay resistance and abrasive resistance.

Description

technical field [0001] The invention belongs to the technical field of refractory production, in particular to a synthesis method of fused magnesia-iron spinel refractory. Background technique [0002] Magnesia-chromium refractories are widely used in the firing zone of cement rotary kilns because of their good kiln skin and chemical resistance to cement clinker. However, the residual magnesia-chrome bricks contain hexavalent chromium compounds. It is a water-soluble carcinogen and seriously pollutes the environment. For this reason, technicians have been working hard to develop alternative refractory materials with good physical and chemical properties, non-toxic, and non-polluting. Contents of the invention [0003] In order to overcome the above defects, the present invention provides a method for synthesizing refractory fused magnesia-iron spinel with low silicon content, few impurities, good thermal stability, corrosion resistance and wear resistance. [0004] The te...

Claims

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Application Information

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IPC IPC(8): C04B35/66C04B35/657
Inventor 赵秋穆松林王晓军耿庆云
Owner DALIAN QIUHE REFRACTORY MATERIAL
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