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概述了武钢炼钢总厂四分厂QRD钢连铸对保护渣的要求,通过对QRD钢特点的分析,对保护渣物理化学性能进行了研究,确定了适合QRD钢结晶器保护渣指标,该保护渣具有低熔点、高黏度、低碱度、好的保温性能和熔化均匀性的特点。工业试用表明,使用此保护渣浇铸无漏钢,未发生预报,铸坯质量良好,能够满足四分厂的生产需求。
In this paper, the requirement of continuous casting of QRD steel for the fourth branch of WISCO Steelmaking Plant was summarized. The physical and chemical properties of the protective slag were studied through the analysis of the characteristics of QRD steel. The indexes of mold powder suitable for QRD steel mold were determined. Mold powder with low melting point, high viscosity, low alkalinity, good thermal insulation properties and melting characteristics. Industrial trial shows that the use of mold powder casting leak-proof, there is no forecast, good quality slab, to meet the fourth branch of the production needs.