Aluminum-manganese-carbon alloy ball for steelmaking deoxidization and recarburization and preparation method thereof

Abstract

The present invention discloses one kind of steelmaking deoxidizing and carburizing Al-Mn-C alloy pellet and its preparation process. The lumpy alloy pellet contains Mn 30- 40 wt%, C 25-35 wt%, Al 10-20 wt%, H2O 0-1 wt%, S 0-0.35 wt% and P 0-0.3 wt%. It is used in steelmaking to reach the aims of deoxidizing and carburizing in low labor strength, less environmental pollution and low cost.

Description

technical field [0001] The invention relates to the field of converter steelmaking, in particular to carburization and deoxidation alloying after converter steelmaking. Background technique [0002] When steel-making converters smelt medium and high-carbon steels, it is generally used to add alloys and recarburizers during the tapping process with the steel flow or at the bottom of the ladle to complete the carburization and deoxidation alloying tasks. This method brings many disadvantages. First of all, because the recarburizer is granular, when the recarburizer has a large particle size, it floats on the liquid steel surface, and the carbon recovery rate is low, generally 80-90%, and the particle size is small, and it is easy to oxidize. , the carburization is unstable, and the addition amount is large, the cost is high, and the working conditions are deteriorated; secondly, the granular carburizer is easy to cause the violent boiling of the molten steel in the ladle and t...

AI Technical Summary

Problems solved by technology

In addition, deoxidation is often required in the steelmaking process. At present, silicon-aluminum iron is used for deoxidation in steelmaking, and various powders and alloys are used for carburization and deoxidation. This not only increases the labor intensity of workers, pollutes the environment, but also increases the cost.