| 摘要 |
FIELD: metallurgy.SUBSTANCE: in compliance with this process metal is tapped at, at least 1630°C and, at tapping, added are: calcium carbide in amount of not over 2 kg per ton of steel, slag-forming materials in amount of 2.5-7 kg per ton of steel and aluminium in amount of 0.5-2.0 kg per ton of steel. During said out-of-furnace processing, metal is blown with inert gas for at least 40 minutes. Metal and slag are deoxidised by aluminium-bearing lumps taken in amount of 0.5-1.8 kg per ton of steel while metal is treated by calcium-bearing wire taken in amount of 0.1-0.3 kg per ton of steel.EFFECT: higher purity of low-silicon steel, increased metal yield, lower production costs.4 cl, 2 tbl |
