Research on raw molten steel secondary dephosphorization - Properties of BaO-based secondary refining slag (1)
Beijing Keji Daxue Xuebao/Journal of University of Science and Technology Beijing(2005)
Abstract
Based on thermodynamic research, the rephosphorization of CaO-based refining slag dephosphorization products would be found seriously when reducing slag was made in LF. The dephosphorization ability of BaO-based refining slag was better than that of CaO-based refining slag, and BaO-based refining slag could also prevent rephosphorization. The industrial experiment was done at 1500°C-1650°C, and the influence on the raw molten steel secondary dephosphorization-rephosphorization prevention by adding different agents were researched. The industrial experiment results indicated that the rephosphorization content of molten steel, which used BaO-based refining slag, was decreased 70%. The desulfurization ability of BaO-based refining slag was the same as that of CaO-based refining slag. On the basis of the experimental results, the process was optimized.
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Key words
BaO-based refining slag,Dephosphorization-rephosphorization prevention,Secondary refining
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