MOLDING POWDER FOR CONTINUOUS CASTING OF THIN SLAB

摘要

A molding powder, characterized in that it has a CaO/SiO2 weight ratio ranging 0.50 to 1.20, comprises one or more compound selected from the group consisting of an oxide, a carbonate and a fluoride of an alkali metal, an alkaline earth metal and other metals, and 0.5 to 5 weight % of carbon powder, has a Li2O content ranging 1 to 7 wt.% and an F content ranging 0.5 to 8.0 wt.%, has a crystallization temperature ranging 1000 to 1200 DEG C, has a surface tension of 250 dyn/cm or more, and a viscosity eta (poise) at 1300 DEG C satisfies a relational formula including a casting rate V (m/min): 6.0 < eta V < 100.0. The molding powder enables a powder slab to be almost free from entanglement in a mold and a continuous casting of a thin slab to be operated with stability.