ABSTRACT This study focuses on understanding the dephosphorization behaviors in converter steelmaking process under different situations. When controlling the basicity of slag, FetO content and bath temperature by single slag and double slag-slag remaining operation to blow ordinary P-containing hot metal, the equilibrium value of phosphorus ([P]e) between hot metal and slag in the early stage of steelmaking is lower than 0.0068%, and the ratio of actual phosphorus content ([P]r) to equilibrium value ([P]e) is less than 4.6. By using top-blown lime powde, dephosphorization efficiency of high phosphorus hot metal at the early stage was up to 93.8%, and [P]r/[P]e lowered to be 2.24. When lime slagging instead of the top-blown lime powder method was used, the dephosphorization effect is bad in the early stage of blowing the medium phosphorus hot metal by double slag process, and it leads to high material consumption and low productivity.

中文翻译：

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转炉炼钢前期脱磷

摘要 本研究的重点是了解不同情况下转炉炼钢过程中的脱磷行为。通过单渣和双渣渣操作吹普通含磷铁水，控制渣碱度、FetO含量和熔池温度时，早期铁水与渣之间的磷平衡值([P]e)炼钢阶段低于0.0068%，实际磷含量（[P]r）与平衡值（[P]e）之比小于4.6。采用顶吹石灰粉，高磷铁水前期脱磷效率高达93.8%，[P]r/[P]e降至2.24。当用石灰造渣代替顶吹石灰粉法时，