Preparation method for low-carbon aluminum-silicon-carbide carbon brick

Abstract

The invention discloses a preparation method for a low-carbon aluminum-silicon-carbide carbon brick. The preparation method includes the following steps: raw materials for the low-carbon aluminum-silicon-carbide carbon brick are all mixed, and the mixture is subjected to die pressing and drying to obtain the low-carbon aluminum-silicon-carbide carbon brick; the low-carbon aluminum-silicon-carbide carbon brick comprises the following raw materials in parts by weight: 55 to 85 parts of an aluminum oxide raw material, 5-15 parts of silicon carbide, 1 to 7 parts of a carbon raw material, 3 to 5 parts of a binding agent, 1 to 5 parts of an antioxidant, and 0.01 to 0.5 part of organic silicon fiber. The preparation method for the low-carbon aluminum-silicon-carbide carbon brick provided by the invention has the advantages that the carbon content of the prepared aluminum-silicon-carbide carbon brick is lower, and the heat conductivity is smaller, so that the energy is saved, and the consumption is reduced.

Description

technical field [0001] The invention relates to the field of refractory materials, in particular to a method for preparing low-carbon aluminum silicon carbide carbon bricks. Background technique [0002] Due to its excellent corrosion resistance and thermal shock resistance, aluminum silicon carbide carbon bricks are widely used as furnace lining materials on various molten iron containers in ironmaking systems. [0003] The mass fraction of carbon in aluminum silicon carbide carbon bricks in the prior art is usually 8% to 16%. For example, the invention with application publication number CN102329142A discloses an aluminum silicon carbide carbon brick, which is composed of the following parts by weight Raw materials: Zinc 1-8 with a particle size of 200-300 mesh, 40-60 high-alumina material with a particle size of 5-0mm, silicon carbide 10-15 with a particle size of 120-320mm, and high-alumina powder 20 with a particle size of 120-180mm -30, -199# graphite 10-15, clay powd...

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Problems solved by technology

[0006] (1) Due to the high carbon content, the thermal conductivity is also high, which increases the heat loss and causes the temperature drop of molten iron during transportation and pretreatment, thereby increasing energy consumption;

[0007] (2) A large amount of precious graphite resources are consumed. Due to the decreasing graphite resources, the price is increasing day by day, resulting in higher and higher cost of aluminum silicon carbide carbon bricks and ironmaking costs;

[0008] (3) The higher the carbon content, the easier the refractory material is to oxidize, and the structure of the oxidized aluminum silicon carbide carbon brick is easily damaged, and its excellent thermal shock resistance and corrosion resistance will be greatly reduced

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