Antioxidant red mud doped coating for high-temperature steel billet

Abstract

The invention relates to an antioxidant red mud doped coating for a high-temperature steel billet. The coating comprises red mud, silicon dioxide, carboxymethyl cellulose, aluminum oxide, magnesium oxide, graphite powder, sodium silicate and water. The mixed powder comprises the following main components in percentage by mass: 15-50% of red mud powder, 20-60% of silicon dioxide powder, 15-75% of aluminum oxide powder, 1-20% of graphite powder, 1-20% of magnesium oxide powder, 5-15% of a high-temperature binder and 0.4-1% of a dispersant. According to the invention of the anti-oxidation coating, the utilization value of the red mud is improved, the treatment capacity of red mud waste is increased, and the pressure of the red mud on the environment is reduced; The antioxidation coating is low in preparation cost and small in environmental pollution, does not pulverize or crack in a high-temperature environment after being brushed, sprayed or dip-coated on a steel billet, forms a layer of compact protection film on the surface of the steel billet, and has good anti-oxidation performance in the heating and heat preservation processes of the steel billet.

Description

Technical field [0001] The present invention relates to the field of high temperature antioxidant protection of the steel, and also relates to the field of recovery of metallurgical solid waste recovery. Background technique [0002] Metal and alloy materials are heated to a certain temperature in various industrial furnaces before completing the die forging, rolling, annealing, quenching and normalizing. During high temperature heating, the oxidation of steel is inevitable, the longer the heating time, the higher the heating temperature, the more severe the oxidation of the steel parts. In addition, it is easy to oxidize during high temperature heating in the alloy element in the steel, and it is difficult to peel off the oxide layer, and the surface defects are formed in the metal rolling or forging process, which can cause rolling for injection. According to statistics, the oxidation caused by the heating of steel products around the world has more than 10%, leading to huge wa...

AI Technical Summary

Problems solved by technology

[0005] Given Al 2 o 3 or SiO 2 The preparation process of the high-temperature anti-oxidation protective coating made of aggregate is cumbersome and the cost is relatively high, and the waste residue of the chromium-containing anti-oxidation coating after cooling and peeling off will cause serious environmental pollution and other problems. The technical problems solved by the present invention include: high temperature anti-oxidation The paint preparation process is simple, the cost is low, and the applicability is wide. The oxidation resistance of the steel material coating during the heating process is strong, and it does not contain chromium that pollutes the environment.

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