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Magnesium-chromium-zirconium composite brick

A composite brick, magnesium chromium zirconium technology, applied in the field of refractory materials, can solve the problems of slag and metal liquid erosion damage, high apparent porosity, poor thermal shock resistance, etc., to save smelting costs, excellent performance, improve equipment The effect of service life

Active Publication Date: 2014-05-07
河南瑞泰耐火材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, traditional magnesium-chromium materials have poor thermal shock resistance, high apparent porosity, and relatively large pore diameters. They are easily eroded and damaged by slag and metal liquids when serving in key parts.

Method used

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  • Magnesium-chromium-zirconium composite brick

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A magnesia-chromium-zirconium composite brick, made of the following raw materials in weight percentage: 30% of fused magnesia-chrome sand with a particle size of 3-5mm, 20% of fused magnesia-chrome sand with a particle size of less than 3mm, and South African chrome concentrate with a particle size of no more than 2mm 30% ore, 15% sintered magnesia powder with a particle size not greater than 0.088mm, and 5% organic-inorganic composite binder; after mixing the raw materials other than the organic-inorganic composite binder, add the organic-inorganic composite binder for kneading , and then sequentially press the mixed raw materials, dry, and fire, pressurize and infiltrate the fired brick body in the zirconium oxychloride solution, and then dry it to obtain the magnesium-chromium-zirconium composite brick. The organic-inorganic composite binder is a sulfurous acid pulp waste liquid-ammonium phosphate composite solution, and the volume ratio of the two is 3:1, wherein, t...

Embodiment 2

[0027] A magnesia-chromium-zirconium composite brick, made of the following raw materials in weight percentage: 47% of fused magnesia-chrome sand with a particle size of 3-5mm, 20% of fused magnesia-chrome sand with a particle size of less than 3mm, and South African chrome concentrate with a particle size of no more than 2mm 18% ore, 13% sintered magnesia powder with a particle size not greater than 0.088mm, and 2% organic-inorganic composite binder; after mixing the raw materials except the organic-inorganic composite binder, add the organic-inorganic composite binder for kneading , and then sequentially press the mixed raw materials, dry, and fire, pressurize and infiltrate the fired brick body in the zirconium oxychloride solution, and then dry it to obtain the magnesium-chromium-zirconium composite brick. The organic-inorganic composite binder is a sulfurous acid pulp waste liquid-magnesium chloride composite solution, and the volume ratio of the two is 1:1, wherein the sp...

Embodiment 3

[0033] A magnesia-chromium-zirconium composite brick, made of the following raw materials in weight percentage: 50% of fused magnesia-chrome sand with a particle size of 3-5mm, 17% of fused magnesia-chrome sand with a particle size of less than 3mm, and South African chrome concentrate with a particle size of no more than 2mm 18% ore, 13% sintered magnesia powder with a particle size not greater than 0.088mm, and 2% organic-inorganic composite binder; after mixing the raw materials except the organic-inorganic composite binder, add the organic-inorganic composite binder for kneading , and then sequentially press the mixed raw materials, dry, and fire, pressurize and infiltrate the fired brick body in the zirconium oxychloride solution, and then dry it to obtain the magnesium-chromium-zirconium composite brick. The organic-inorganic composite binder is a sulfurous acid pulp waste liquid-magnesium sulfate composite solution, and the volume ratio of the two is 2:1, wherein the spe...

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Abstract

The invention belongs to the field of refractory materials, and particularly relates to a magnesium-chromium-zirconium composite brick. The magnesium-chromium-zirconium composite brick is produced by adopting the following materials: 30-50% of electrically-fused magnesium-chromium sand with the granularity of 3-5mm, 10-20% of electrically-fused magnesium-chromium sand with the granularity of less than 3mm, 10-30% of South Africa chromium concentrate with the granularity of not greater than 2mm, 5-15% of sintered magnesium sand powder with the granularity of not greater than 0.088mm, and 2-5% of an organic-inorganic compound binding agent. The magnesium-chromium-zirconium composite brick is produced by the following steps: mixing the materials except the organic-inorganic compound binding agent, then adding the organic-inorganic compound binding agent, carrying out mulling, pressing, drying, sintering to obtain a sintered brick, carrying out pressurized permeation on the sintered brick in a zirconium oxychloride solution, and drying. The magnesium-chromium-zirconium composite brick has the slagging resistance and the permeation prevention property of conventional magnesium-chromium refractory materials, is applicable to the field of refining of steel metallurgy, can remarkably prolong the service life of refining equipment and has good economical and social benefits.

Description

technical field [0001] The invention belongs to the field of refractory materials, and in particular relates to a magnesium-chromium-zirconium composite brick. Background technique [0002] Magnesium-chromium refractories have the advantages of good corrosion resistance and high strength, and are widely used in iron and steel and nonferrous metallurgy industries. Iron and steel refining equipment, such as the vacuum chamber and dipping tube of the RH furnace, are built with magnesia-chromium materials. Non-ferrous metallurgical equipment, including flash furnaces, Noranda furnaces, and Isa furnaces, etc., have a relatively large proportion of masonry linings. Use magnesium chrome material. However, traditional magnesium-chromium materials have poor thermal shock resistance, high apparent porosity, and relatively large pore diameters. They are easily corroded and damaged by slag and liquid metal when serving in key parts. Contents of the invention [0003] In order to fur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
Inventor 叶亚红刘锡俊杨卫波刘晓磊翟耀杰刘昭徐琳琳张跃峰袁林胡世平
Owner 河南瑞泰耐火材料科技有限公司
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