| 摘要 |
The high clean steel is manufactured by (a) decarburizing the molten steel in the ladle, deoxidating it and temperature-raise treating it by the reflux gas in the vacuum tank, and (b), feeding 1.0-1.3kg flux composed of 47-53 wt.% calcium oxide(CaO), 1.5-2.5 wt.% silicon oxide (SiO2), 36-44 wt.% aluminium oxide (Al2O3) and at most 1.5 wt.% iron oxide (Fe2O3) w.r.t. 1000kg molten steel into the tank, and vacuum treating the mixture at 80-100 Nm3/hr reflux gas flow.
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