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High-temperature compact unfired composite brick and forming technique thereof

A composite brick and dense technology, applied in the field of refractory bricks, can solve the problems of human harmful and carcinogenic, complex production process, unstable quality, etc., and achieve the effect of good corrosion resistance, strong corrosion resistance and uniform mixing.

Inactive Publication Date: 2015-06-10
营口瑞德镁质材料科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Existing recombined magnesia-chrome bricks are fired bricks with complex production process, high cost and unstable quality. During production and use, toxic hexavalent chromium is produced, which seriously pollutes the environment and is harmful to human body and causes cancer.

Method used

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  • High-temperature compact unfired composite brick and forming technique thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A high-temperature dense non-fired composite brick is characterized in that it is made of the following raw materials by weight percentage:

[0026] Fused magnesia particles MgO content>98% particle size 5-3mm 10%;

[0027] Fused magnesia particles MgO content>98% particle size 3-1mm 35%;

[0028] Fused magnesia particles MgO content>98% particle size 1-0.088mm 20%;

[0029] Fused magnesia powder MgO content > 98% particle size ≤ 0.088mm 10%;

[0030] Corundum powder Al 2 o 3 Content>99% Particle size≤0.088mm 10%;

[0031] Fused magnesia and corundum 1:1 co-ground powder, particle size 800 mesh, 10%;

[0032] Metal silicon powder particle size≤0.088mm 1.5%

[0033] Solid resin particle size ≤0.088mm 2.5%;

[0034] Urotropine Particle size ≤0.088mm 1%;

[0035] Add resin 3%.

[0036] The molding process of the above-mentioned high-temperature dense non-fired composite brick includes the following specific steps:

[0037] (1) Premixing: Take fused magnesia, coru...

Embodiment 2

[0044] Fused magnesia particles MgO content>98% particle size 5-3mm 10%;

[0045] Fused magnesia particles MgO content>98% particle size 3-1mm 35%;

[0046] Fused magnesia particles MgO content>98% particle size 1-0.088mm 19%;

[0047] Fused magnesia powder MgO content > 98% particle size ≤ 0.088mm 5%;

[0048] Corundum powder Al 2 o 3Content>99% Particle size≤0.088mm 10%;

[0049] Fused magnesia and corundum 1:1 co-ground powder, particle size 800 mesh, 15%;

[0050] Metal silicon powder particle size≤0.088mm 2.5%

[0051] Solid resin particle size ≤0.088mm 2.5%;

[0052] Urotropine Particle size ≤0.088mm 1%;

[0053] Additional resin 4%.

[0054] The molding process of the above-mentioned high-temperature dense non-fired composite brick includes the following specific steps:

[0055] (1) Premixing: Take fused magnesia, corundum co-grinding powder, and metal silicon powder according to the above raw material ratio and mix them to form a premixed powder. The mass rati...

Embodiment 3

[0062] Fused magnesia particles MgO content>98% particle size 5-3mm 10%;

[0063] Fused magnesia particles MgO content>98% particle size 3-1mm 35%;

[0064] Fused magnesia particles MgO content>98% particle size 1-0.088mm 18%;

[0065] Fused magnesia powder MgO content > 98% particle size ≤ 0.088mm 10%;

[0066] Corundum powder Al 2 o 3 Content>99% Particle size≤0.088mm 5%;

[0067] Fused magnesia and corundum 1:1 co-ground powder, particle size 800 mesh, 15%;

[0068] Metal silicon powder particle size ≤0.088mm 3.4%;

[0069] Solid resin particle size ≤0.088mm 3.5%;

[0070] Urotropine particle size ≤0.088mm 0.1%;

[0071] Additional resin 6%.

[0072] The molding process of the above-mentioned high-temperature dense non-fired composite brick includes the following specific steps:

[0073] (1) Premixing: Take fused magnesia, corundum co-grinding powder, and metal silicon powder according to the above raw material ratio and mix them to form a premixed powder. The mass...

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Abstract

The invention provides a high-temperature compact unfired composite brick which effectively fuses the advanced ideas of fired and unfired products to obtain a very ideal chromium-free carbon-free refractory material. The high-temperature compact unfired composite brick is prepared from fused magnesite, corundum, fused magnesite-corundum co-ground powder, a solid resin, urotropine, a binder, and a premix powder composed of fused magnesite-corundum co-ground powder and metallic silicon powder. The composite brick has the characteristics of no chromium, high temperature resistance, high compactness, high strength, long service life and the like. In the preparation process, the fused magnesite-corundum co-ground powder and metallic silicon powder are premixed to remove the static electricity in the metallic silicon powder, so that the mixture is more uniform. Besides, the forming technique adopts a two-stage forming technique, the primary pressing is carried out at normal temperature, and the secondary pressing is carried out after heat treatment. Since the binder resin is activated by heat treatment, the solubility is increased, and therefore, the secondary pressing under such conditions can greatly enhance the density and strength of the brick and effectively reduce the pores.

Description

technical field [0001] The invention relates to refractory bricks, in particular to a non-fired composite brick with the characteristics of high temperature and compactness. Background technique [0002] Existing recombined magnesia-chrome bricks are fired bricks with complex production process, high cost and unstable quality. During production and use, toxic hexavalent chromium is produced, which seriously pollutes the environment and is harmful to human body and causes cancer. Contents of the invention [0003] The purpose of the present invention is to provide a non-fired composite brick that can replace the existing fired magnesia-chrome brick, which has the characteristics of chrome-free, high temperature resistance, compactness, high strength and long service life. [0004] The specific technical scheme of the present invention is as follows: A high-temperature dense non-fired composite brick is made of the following raw materials in weight percentage: [0005] Fuse...

Claims

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Application Information

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IPC IPC(8): C04B35/66
Inventor 尹德柱
Owner 营口瑞德镁质材料科技有限公司