光学碱度（英文名称：phosphatecapacity）的概念已广泛用来解释和预测炉渣的化学性质，光学碱度利用探针离子的信息表示炉渣中的相对“自由”氧离子，是一种表达炉渣碱度的有效方法。
讨论了光学碱度在冶金渣中的应用。
Application of optical basicity to metallurgical slags was discussed.
硫、磷的分配系数随光学碱度的增大而增大。
The increase of sulphur and phosphorus distribution coefficient with the increase of optical basicity.
用光学碱度和二次正规溶液模型对转炉出钢过程混冲脱硫进行了研究。
Optical basicity and regular solution model of quadratic formalism was used in the research of desulfurization of molten steel during tapping by slag filtrating.
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