Abstract: The technology of skateboard type slag blocking in converter was briefly described. Combined with the application of the 240 t converter slag blocking with slider system in Baotou Steel Rare-earth Steel Sheet Factory, the adaptability measures and actual results were introduced. The optimized process of skateboard type slag blocking effectively reduces the phenomenon of phosphorus reversion and the amount of slag in the tapping process, increases the yield of manganese and silicon alloy elements. The consumption of aluminum-iron alloy decreased by 0.39 kg/t and the consumption of ferrous charge decreased by 3.47 kg/t. The goal of optimizing steel quality and improving economic efficiency can be achieved.

Key words: converter, skateboard type slag blocking, roughing slag, yield