Composite combined aluminum oxide-silicon carbide-(carbon) system amorphous refractory material

A refractory material and silicon carbide technology, which is applied in the field of composite bonded alumina-silicon carbide-based unshaped refractory materials, can solve problems such as unsatisfactory performance and service life, reduce impurity content, improve wetting and dispersion, prevent overflow effect

Active Publication Date: 2009-02-18
RUITAI MATERIALS TECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the performance and lifespan of this type of material are unsatisfactory.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Use 8-3mm ordinary sintered corundum 31%, 3-1mm ordinary sintered corundum 21%, 1-0.088mm ordinary sintered corundum 20%, <0.088mm fused corundum 8%, <0.088mm silicon carbide 10%, alumina powder 3 %, silica fume 2%, aluminum 80 cement 0.5%, hydratable alumina 5%, plus 0.1% polycarboxylate superplasticizer, polyacrylic acid emulsion 3%, and water 3% after mixing to obtain good fluidity slurry. After forming, the slurry coagulates in 0.5 hours, solidifies in 1.5 hours, and can be demolded after 12 hours. After drying at 110℃×24H, the sample obtained a flexural strength of 10MPa and a compressive strength of 40MPa. After heat treatment at 1100°C for 3 hours, the flexural strength of 12MPa and the compressive strength of 53MPa are obtained, and the change of firing line is 0.0%. After heat treatment at 1500°C for 3 hours, the flexural strength of 18MPa and the compressive strength of 94MPa are obtained, and the change of firing line is 0.08%. The product of the invention...

Embodiment 2

[0047] Using 8-3mm fused dense corundum 29%, 3-1mm dense corundum 26%, 1-0.088mm dense corundum 7%, 1-0.088mm silicon carbide 7%, 1-0.088mm ball pitch 3%, <0.088mm carbonization Silicon 16.5%, <0.088mm oxidation-modified carbon black 1.5%, alumina micropowder 3%, silica fume 2%, hydratable alumina 5%, plus polycarboxylate superplasticizer 0.1%, polyacrylic acid emulsion 3% , with 3% water, to obtain a slurry with good formability. After demoulding, the performance of the sample treated at 110℃×24h: flexural strength 3MPa, compressive strength 41MPa; performance after 1450℃×3h buried carbon treatment: flexural strength 6MPa, compressive strength 60MPa, line change +0.2 %, relative erosion index 55%.

[0048] Compared with the low-cement aluminum silicon carbide carbon material, the material of the invention has better slag resistance. Therefore, this product replaces cement-bonded products and is expected to prolong the service life of refractory materials in the main ditch s...

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Abstract

The invention relates to a complex combination alumina-carborundum-(carbon) series amorphous fire proof material, and the formula comprises: 36 to 32 percent of 8-3mm corundum or bauxite, 18 to 26 percent of 3-1mm corundum or bauxite, 10 to 22 percent of 1-0.0088mm corundum or bauxite, 0 to 15 percent of 1-0.088mm carborundum, 0 to 3 percent of 1-0.0088 spherical asphalt, 0 to 20 percent of d90 less than 0.088mm corundum or bauxite, 0 to 20 percent of d90 less than 0.088 carborundum, 0 to 3 percent of d90 less than 0.088mm high-carbon materials, 0 to 5 percent of alpha alumina micro powder, 1 to 8 percent of alumina hydrate, 1 to 6 percent of silicon ash, 0 to 2 percent of calcium aluminate cement, 0.05 to 0.4 percent of plus super-plasticizer (polycarboxylic acids+sulfonated naphthalene formaldehyde polymer+sulfonated melamine polymer), 1 to 6 percent of plus polypropylene acid series latex and 1 to 6 percent of plus water. Compared with low-cement aluminum carborundum carbon material, the material has good anti-corrosion performance. Therefore, the service life of a kilneye of a cement kiln and a main groove slag line of a blast furnace can be prolonged when a product is combined by the complex combination alumina-carborundum-(carbon) series amorphous fire proof material instead of the cement.

Description

technical field [0001] The invention relates to a compound bonded aluminum oxide-silicon carbide-(carbon) series unshaped refractory material. At room temperature, rely on the reaction of polyacrylic acid emulsion and hydratable aluminum oxide to form polyacrylic acid aluminum (calcium) to form a bond to obtain the required coagulation, hardening, mold release and drying properties. At high temperature, rely on reaction sintering to form mullite bond to obtain good high temperature resistance. At the same time, it is also beneficial to disperse carbonaceous raw materials and improve the anti-oxidation layer to increase the service life. Background technique [0002] Alumina-silicon carbide-(carbon) material is a widely used refractory material. [0003] The cement industry uses alumina-silicon carbide refractory castables as materials for rotary kiln mouths and other places. The material relies on the oxidation of silicon carbide to produce a high-viscosity substance, whi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
Inventor 王杰曾袁林王俊涛刘锡俊叶亚红赵洪亮
Owner RUITAI MATERIALS TECHNOLOGY CO LTD
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