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Al4SiC4-Al2O3 composite refractory materials and preparation method thereof

A technology of refractory material and binder, applied in the field of composite refractory material, can solve the problems of difficult industrialization and high cost, and achieve the effect of prolonging service life, excellent performance and abundant raw material resources

Inactive Publication Date: 2009-05-06
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the corresponding cost is relatively high, it is difficult to realize the industrialization of production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] a kind of Al 4 SiC 4 -Al 2 o 3 Composite refractory material and preparation method thereof: 50-55wt% Al 2 o 3 Bauxite with a content ≥48wt% and a particle size of 0.1-0mm, 45-50wt% of industrial carbon powder with a C content ≥80% and a particle size of 0.1-0mm, plus a binder of 3-7wt% of the above mixture, Stir for 15-25 minutes, press to form, dry at 60-90°C for 12-24 hours, then sinter and synthesize under argon atmosphere at 1600-1700°C for 5-6 hours, and then cool naturally Get Al 4 SiC 4 -Al 2 o 3 Composite refractories.

[0012] Wherein: the binding agent is a mixture of calcium lignosulfonate and sodium lignosulfonate, which is first dissolved into an aqueous solution and then used for batching.

Embodiment 2

[0014] a kind of Al 4 SiC 4 -Al 2 o 3 The composite refractory material and its preparation method are the same as in Example 1 except that the binding agent is industrial dextrin powder.

Embodiment 3

[0016] a kind of Al 4 SiC 4 -Al 2 o 3 Composite refractory material and preparation method thereof: 55-60wt% Al 2 o 3 Bauxite with content ≥ 48wt% and particle size 0.1-0mm, 40-45% C content ≥ 80wt% and industrial charcoal powder with particle size 0.1-0mm, plus 7-10wt% sulfurous acid pulp of the above mixture Waste liquid, stirred and mixed for 5-15 minutes, pressed into shape; dried at 60-110°C for 24-36 hours, then sintered in an argon atmosphere at 1650-1750°C for 4-5 hours, after natural cooling Made Al 4 SiC 4 -Al 2 o 3 Composite refractories.

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Abstract

The invention relates to a composite refractory material of Al4SiC4 and Al2O3 and a method for preparing the same. The adopted technical proposal is as follows: firstly, 50 to 65 weight percent of bauxite and 35 to 50 weight percent of industrial carbon powder are mixed; and the mixture is added with 3 to 10 weight percent of bonding agent to be stirred for 5 to 25 minutes, is pressed to be shaped, and is dried for 12 to 36 hours under the condition of between 60 and 110 DEG C or naturally dried for 24 to 48 hours indoors; and secondly, the mixture is sintered for 2 to 6 hours under argon atmosphere and under the condition of between 1,600 and 1,800 DEG C, and is cooled naturally to obtain the composite refractory material of the Al4SiC4 and the Al2O3. The composite refractory material has the characteristics of rich raw material resource, low production cost and easy industrialized production. The composite refractory material of the Al4SiC4 and the Al2O3 prepared by the method not only has excellent performance, but also can prolong the service life, is suitable for a furnace lining material for nonferrous metal and iron and steel smelting equipment, and particularly suitable for producing ladle inside lining and refining furnace lining of clean steel such as low carbon steel, ultra-low carbon steel and so on.

Description

technical field [0001] The invention belongs to the technical field of composite refractories. Especially involving an Al 4 SiC 4 -Al 2 o 3 Composite refractory material and its preparation method. Background technique [0002] Al 4 SiC 4 -Al 2 o 3 Composite refractories have excellent high temperature resistance and thermal stability. They are raw materials for preparing new lining materials for non-ferrous metals and iron and steel smelting equipment, and are also antioxidants for carbon-containing refractories and non-oxide refractories to prevent oxidation. They are especially suitable for production The ladle lining and refining furnace lining of clean steel such as low carbon steel and ultra-low carbon steel replace alumina-carbon and high alumina-carbon composite refractory materials, which are conducive to improving the quality of steel and have good use effects. [0003] Aluminum carbide silicide (Al 4 SiC 4 ) has a high melting point (about 2037°C), high...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C04B35/56C04B35/10
Inventor 邓承继祝洪喜白晨
Owner WUHAN UNIV OF SCI & TECH
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