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Al2O3-MA-SiC-C refractory castable material with carbon wrapped by nano Al2O3-SiC film and preparation method thereof

An al2o3-ma-sic-c, refractory castable technology, applied in the field of refractory materials, can solve the problems of difficult on-site construction and operation, difficult to improve the service life of the tapping ditch, etc.

Inactive Publication Date: 2010-07-07
高树森
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the concept of domestic and foreign blast furnace tapping trough lining is easy to construct. However, this lining also has a disadvantage, that is, it is difficult to improve the service life of the tapping trough. High-quality refractory materials are necessary, which brings difficulties to on-site construction operations

Method used

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  • Al2O3-MA-SiC-C refractory castable material with carbon wrapped by nano Al2O3-SiC film and preparation method thereof
  • Al2O3-MA-SiC-C refractory castable material with carbon wrapped by nano Al2O3-SiC film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] Embodiment 1 that the present invention is listed in table 1 is to use Al(OH) 3 Al and SiC Composite Sol Suspension Thin Film Encapsulated Carbon 2 o 3 -MA-SiC-C castable formula, the prepared mixture is added to the mixer, and then a certain concentration of carbon-Al(OH) 3 and SiC composite sol suspension are directly added to the mixture, and during the wet mixing process, the calcined MgO powder in the mixture and the mixed water undergo a hydration reaction at room temperature to generate Mg(OH) 2 Sol liquid, the two composite sol suspensions are strongly adsorbed on the surface of the carbon powder through the combination and adsorption of the sol, forming a full-coverage, crack-free, dense carbon coating, and the transition from sol to gel process, the formation of nano-Al 2 o 3 and MgO gel particles, in the heating process, through the in-situ synthesis reaction, the nanostructure matrix with nano-secondary spinel, aluminum oxide, silicon carbide and carbon ...

Embodiment 2

[0058] The present invention is listed in table 1 embodiment 2 is to use Al(OH) 3 Al and SiC Composite Sol Suspension Thin Film Encapsulated Carbon 2 o3 -MA-SiC-C castable formula, add the prepared mixture into the forced mixer, and then process a certain concentration of carbon-Al(OH) through high-speed impact stirring 3 and SiC composite sol suspension, directly added to the mixture, through the combination and adsorption of the sol, the composite sol is strongly adsorbed on the surface of the carbon powder, forming a full-coverage, crack-free, dense carbon coating layer. During the conversion of sol to gel, nano-Al 2 o 3 and MgO gel particles, in the heating process, through the in-situ synthesis reaction, a nano-structured matrix with nano-secondary spinel, aluminum oxide, silicon carbide, and carbon as the main components has been generated, and the Al of the present invention has been made. 2 o 3 -MA-SiC-C refractory castable.

[0059] The main feature of this embod...

Embodiment 3

[0061] The present invention is listed in the total reaction synthesis of the embodiment 3 of table 1 with nanometer Al 2 o 3 Combined with MgO ceramics and with Al(OH) 3 and Mg(OH) 2 Composite Sol Suspension Coated Carbon Al 2 o 3 -MA-SiC-C castable formula, the prepared mixture is added to the forced mixer, and then a certain concentration of carbon-Al(OH) 3 and Mg(OH) 2 Sol suspension, directly added to the mixture, through Al(OH) 3 and Mg(OH) 2 The combination and adsorption of the composite sol suspension makes the composite sol strongly adsorb on the surface of the carbon powder, forming a full-coverage, crack-free, and dense carbon coating. Compared with Example 2, this method simplifies the production process and can be added to the mixture to obtain a larger amount of nano-secondary spinel. During the conversion of sol to gel, nano-Al 2 o 3 and MgO gel particles, in the heating process, through the in-situ synthesis reaction, a nano-structured matrix with nan...

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Abstract

The invention relates to an Al2O3-MA-SiC-C refractory castable material with carbon wrapped by nano Al2O3-SiC film or nano Al2O3-MgO film, and a preparation method thereof. The preparation method of the nano carbon-containing castable material comprises: preparing carbon-containing sol suspension with Al(OH)3-SiC or Al(OH)3-Mg(OH)2 through a high-speed impact mixer, coating the carbon-containing sol suspension on the surface of carbon powder to form a compact carbon wrapping layer with complete coverage and no crack, and carrying in-situ synthesis of nano gel particles of Al2O3 and SiC or Al2O3 and MgO generated during transformation from sol to gel so as to generate a nano-sized matrix with carbon-containing nano secondary spinellite, Al2O3 and SiC as main crystalline phases, thereby completing the preparation of the Al2O3-MA-SiC-C refractory castable material made of nano material. The castable material has particularly excellent resistance against erosion and scouring of molten iron slag, and can satisfy the requirements for use in the iron tapping channel of the modern large-scale blast furnace. Moreover, the invention significantly prolongs the service life, reduces the cost and facilitates the environmental protection.

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 , SiC film wrapped carbon Al 2 o 3 - MA-SiC-C refractory castable and preparation method thereof. [Background technique] [0002] With the rapid development of the iron and steel industry, the large-scale iron-making blast furnace and the advancement of smelting technology, the wide application of a series of blast furnace intensified smelting technologies has led to a sharp increase in the amount of slag and iron processed, the increase in the temperature of molten iron, and the enhanced oxidation of slag and iron. Greatly exacerbated the damage of iron slag to the refractories used in the iron tapping trough, seriously affecting the normal production of blast furnace smelting. Therefore, the service life of the refractory materials used in the iron tapping trough has received great attention from iron smelting and refractory materia...

Claims

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Application Information

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IPC IPC(8): C04B35/66C21B7/14
Inventor 高树森
Owner 高树森
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