Dry magnesia carbon material

Abstract

The invention discloses a dry magnesia carbon material which consists of waste magnesia carbon brick particles with the particle size ranges of 0.3-1 mm and 1-3 mm, magnesia matrix, phenolic resin powder, boric acid powder and so on, wherein the weight of the waste magnesia carbon brick particles with the particle size range of 0.3-1 mm accounts for 25-35% of the total weight of the raw materials; the weight of the waste magnesia carbon brick particles with the particle size range of 1-3 mm accounts for 40-50% of the total weight of the raw materials; the weight of the magnesia matrix accounts for 13-30% of the total weight of the raw materials; the weight of the phenolic resin powder accounts for 1-4% of the total weight of the raw materials; the weight of the boric acid powder accounts for 0.5-1.5% of the total weight of the raw materials. The dry magnesia-carbon material has the advantages that remaining waste magnesia carbon bricks after steel ladle using are used to replace magnesia aggregate, so that not only can waste and old materials be reused, but also the enterprise production cost is greatly reduced; in addition, the produced continuous casting tundish working layer lining is excellent in anti-scouring and anti-erosion properties, so that the production safety is improved.

Description

technical field

[0001] The invention relates to the field of iron and steel metallurgy continuous casting, in particular to a magnesia-carbon dry material used for making the inner lining of a tundish working layer for continuous casting. Background technique

[0002] In the field of iron and steel metallurgical continuous casting, the raw material traditionally used to make the lining of the working layer of the tundish for continuous casting is magnesium dry material, which is mainly composed of magnesia aggregate (with a particle size range of 0.3 to 1 , and 1-3mm magnesia particles are called magnesia aggregate) and magnesia matrix (magnesia particles with a particle size range of less than 0.088mm are called magnesia matrix). Although the above-mentioned dry magnesia materials can meet the needs of iron and steel metallurgical production, they are expensive, and the production and use costs of enterprises are high. Therefore, there is an urgent need to produce a relativ...