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Bauxite-based nanometer composite oxide ceramic bond A1203-MgO-C unfired product and preparation method thereof

A technology of al2o3-mgo-c, oxide ceramics, applied in the field of refractory materials

Inactive Publication Date: 2011-08-31
高树森
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In terms of performance, this product has excellent resistance to molten steel slag erosion and penetration resistance, and at the same time significantly improves thermal shock resistance, high temperature volume stability, high temperature creep resistance and suitable heat insulation performance, so it is used in ladles and secondary Refining furnace application, solve the current Al 2 o 3 - Various technical problems in the production and use of MgO-C bricks meet the development needs of secondary refining technology and provide the best service for the steel industry

Method used

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  • Bauxite-based nanometer composite oxide ceramic bond A1203-MgO-C unfired product and preparation method thereof
  • Bauxite-based nanometer composite oxide ceramic bond A1203-MgO-C unfired product and preparation method thereof

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Embodiment 1

[0040] According to embodiment 1 listed in table 1 according to the present invention, alumina-based total reaction is synthesized with nanometer Al 2 o 3 , MgO ceramic bonding and Al(OH) 3 , Mg(OH) 2 Composite Sol Suspension Coated Carbon Al 2 o 3 - MgO-C non-fired product formula, add the prepared dry mixture into the wet milling kneader, dry mix for 1 to 2 minutes, and then oxidize a certain concentration of carbon-containing nanocomposite hydrogen that has been mixed with high-speed impact stirring The material sol suspension binder is directly added to the mixture, and then wet kneaded for 20-30 minutes, and 0-1% of water is added according to the water demand of the mixture. ) pressed by a brick press, and the molded brick is heat-treated in a tunnel-type heating kiln at a temperature of 600 to 800°C to make the alumina-based nano-oxide ceramic bonded Al of the present invention. 2 o 3 -MgO-C non-fired products.

[0041] The biggest feature of this embodiment is t...

Embodiment 2

[0043] According to embodiment 2 listed in table 1 according to the present invention, reaction synthesis and pre-synthesis use nanometer Al 2 o 3 , MgO ceramic bonding and Al(OH) 3 , Mg(OH) 2 , SiC composite sol suspension wrapped carbon Al 2 o 3 - MgO-C non-fired product formula, add the prepared dry mixture into the wet milling kneader, dry mix for 1 to 2 minutes, and then oxidize a certain concentration of carbon-containing nanocomposite hydrogen that has been mixed with high-speed impact stirring The material and SiC sol suspension binder are directly added to the mixture, and then wet kneaded for 20-30 minutes, and 0-1% of water is added according to the water demand of the mixture. (1000t) brick press molding, the formed brick adobe is heat-treated with 600~800 ℃ of temperature in the tunnel type heating kiln, the Al 2 o 3 -MgO-C non-fired products.

[0044] The biggest feature of this embodiment is that SiC and composite oxides are used as coating materials, esp...

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Abstract

The invention relates to an A1203-MgO-C unfired product with carbon wrapped by nano Al2O3-MgO film and a preparation method thereof. The product uses natural high alumina bauxite (AlOOH) and sintered periclase (MgO) as initial raw material and employs method of sol-gel technology, which comprises following steps, putting superfine high alumina bauxite, carbon dust, water and additive into high speed impact mixer, carrying out coating process so as to let the materials have strong impact and mix with each other to form high density composite sol suspension liquid of carbon and aluminium hydroxide, therefore Al(OH)3 is mightily adsorbed on the surface of carbon, then realizing workmanship of coating powdered carbon by aluminium hydroxide. During the wet-milled process of mixture, the magnesium oxide powder and the mixture water in the matrix powder have hydration reaction to produce magnesium hydroxide sol, and the magnesium hydroxide sol and the aluminium hydroxide sol have situ synthesis reaction to produce nanostructured matrix of carbon-aluminium spinel to prepare A1203-MgO-C unfired product of the invention.

Description

technical field [0001] The invention belongs to the technical field of refractory materials, and in particular relates to a nano-Al 2 o 3 Al and MgO thin film coated carbon 2 o 3 -MgO-C non-fired products. Background technique [0002] The development trend of modern steelmaking production is that the proportion of continuous casting is increasing, and the refining technology outside the furnace is widely used to reduce inclusions in steel, increase special varieties of steel, and improve the quality of variety steel. Therefore, the function of the ladle has changed significantly, from a container for molten steel to a new smelting process equipment. Due to the increase of refining temperature, the residence time of molten steel is prolonged, the addition of alloy elements and slagging for refining, and the blowing of argon from the bottom of the ladle for strong stirring lead to worsening conditions of use of the refining ladle and aggravated damage to the lining of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/117C04B35/622
Inventor 高树森
Owner 高树森
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