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유병돈,손봉상,최현수,정우광 대한금속재료학회(대한금속학회) 1997 대한금속·재료학회지 Vol.35 No.12
A new hot metal pretreatment process has been developed at Pohang Works to produce low phosphorus steel economically. A new process could be characterized by simultaneous dephosphorization and desiliconization with oxygen and lime based flux after desulfurizing hot metal. In this study, the influence of the operational conditions such as hot metal and slag compositions and blowing condition was investigated. Dephosphorization ratio of hot metal was increased with the [Si] and [Mn] oxidation ratio. On the other hand, hot metal dephosphorization ratio was decreased with (%T.Fe) and basicity in slag. By the use of dephosphorized hot metal in a converter, the phosphorus content at blowing end was less than 0.01wt%.