High-strength high-alumina brick prepared from homogenized alumina for calcium carbide furnace and preparation method thereof

Abstract

The invention discloses a high-strength high-alumina brick prepared from homogenized alumina for a calcium carbide furnace. The high-strength high-alumina brick comprises the following components in percentage by weight: 5%-15% of 5-3mm 88-grade homogenized alumina, 25%-40% of 3-1mm 88 homogenized alumina, 12%-16% of 1-0mm 88-grade homogenized alumina, 5%-15% of 320-mesh 99-grade tabular corundum, 12%-25% of 220-mesh 80-grade ring kiln alumina, 2%-5% of 220-mesh hard clay, 2%-4% of 320-mesh kyanite and 3%-8% of Soochow white mud, wherein the sum of the weight percentage of the components is 100%; and the sum of the weight percentage of the components is used as a benchmark, 0.3%-0.6% of yellow dextrin, 0.15%-0.25% of surface active agent and 2%-3% of water are additionally added, wherein the surface active agent is a mixture of a sulfonated naphthol formaldehyde polymer and polycarboxylic acid, the weight ratio of which is 1:1.

Description

technical field [0001] The invention belongs to the technical field of refractory materials, and in particular relates to a high-strength high-alumina brick for a calcium carbide furnace prepared by using homogenized bauxite and a preparation method thereof. Background technique [0002] Calcium carbide is an important basic chemical product. In recent years, with the continuous rise of international oil prices and the continuous increase in the cost of petroleum deep-processing products, calcium carbide process polyvinyl chloride and other downstream industries of calcium carbide have developed rapidly, and the demand and production capacity of calcium carbide are also increasing day by day. The technical level of calcium carbide furnace equipment in my country's calcium carbide industry has also been greatly improved. In the calcium carbide furnace, the electric energy is converted into heat energy, so that the carbon of the carbon raw material and the calcium in the quickl...

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Problems solved by technology

However, in the actual process, since the temperature in the oven stage generally cannot reach above 2000°C, the carbon graphitization of low-temperature carbon ramming and self-baked carbon bricks is not sufficient, and the gaps between the carbon bricks still exist. severely damage the carbon brick layer

Especially in order to improve production efficiency and increase production capacity, when melting at a temperature exceeding 2000°C, the lining temperature of high-alumina bricks is still high, requiring high-alumina bricks to have higher strength, higher load softness, and better corrosion resistance Performance, but high alumina bricks that meet the performance indicators specified in the national standard are still difficult to withstand such high temperature and harsh working conditions

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