발간논문

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Vol.35, No.12, 1716 ~ 1724, 1997
Title
Development of Hot Metal Dephosphorization Process in a Basic Oxygen Furnace
손봉상 , 최현수 , 정우광 , 유병돈 H . S . Sohn , H . S . Choi , W . G . Jung , B . D . You
Abstract
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%.
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