Exothermic type mold additives for continuous casting

Abstract From the Canadian patent

An exothermic-type mold additive for continuous casting comprises 20-90 wt% base raw materials 0-10 wt% silicious, raw materials containing more than 50 wt% SiO2 content 0-20 wt% flux raw materials, 2-30 wt% of one or more than one exothermic material selected from a group comprising carbonates, bicarbonates and nitrates of alkaline metals and 3-30 wt% of one or more than one component as a reducing material selected from a group comprising carbon silicon, and silicon alloys. Oxidation exothermic speed is controlled by controlling the kind and amounts of reducing materials, and casting with little carburization and few inclusions, pin-holes, etc. can be obtained.