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光学碱度的概念现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，炉渣的光学碱度即可通过测量而得到，也可由炉渣的化学成分计算出来．很多结果表明，在炼钢的渣剂控制模型中，利用光学碱度比一般碱度更能可靠地控制冶炼终点的化学成分；在钢包和中间包利用光学碱度的概念也有助于控制钢中的残余元素；也可以用来建立一些元素渣—金属平衡时的计算公式．本文系统介绍了光学碱度的概念，讨论和评价了其在冶金中的应用．
The concept of optical basicity is now widely used to interpret and predict the chemical properties of slag. Optical Alkalinity The use of information on probe ions to indicate relatively “free” oxygen ions in the slag is an effective way of expressing the basicity of the slag. The optical basicity of the slag is either measured or calculated from the chemical composition of the slag come out. Numerous results show that the use of optical basicity to more reliably control the chemical composition of the smelting end point in optical slag control models than the general alkalinity; the concept of using optical basicity in ladle and tundish also helps to control steel Of the remaining elements; can also be used to establish some elemental slag - metal balance formula. This paper systematically introduces the concept of optical basicity, discussed and evaluated its application in metallurgy.