Alumina inclusions generated from aluminum deoxidation may undergo several transformations depending on steelmaking conditions. Under reducing conditions, in contact with MgO-saturated slag, alumina inclusions are known to transform to spinel. However, there are uncertainties related to CaO pick-up by alumina-based inclusions. This work aims to provide some clarification of CaO pick-up by alumina inclusions through a series of experiments. First, the role of silicon in calcium transfer from slag was examined by conducting two similar experiments: one without any silicon addition and a second with 1 wt pct electronic grade silicon addition. Second, the role of crucibles was tested by conducting experiments in ZrO2 and CaO-3 pct ZrO2 crucibles. It was found that the addition of silicon significantly enhances the rate of CaO pick-up when there was no silica in the slag at the start of reaction. The effect of the crucible on CaO pick-up was found to be weaker than that of the 1 wt pct silicon addition.

中文翻译：

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未经钙处理的铝镇静钢中钙向氧化物夹杂物的转移

铝脱氧产生的氧化铝夹杂物可能会根据炼钢条件发生多次转变。在还原条件下，与 MgO 饱和炉渣接触时，已知氧化铝夹杂物会转变为尖晶石。然而，氧化铝基夹杂物对 CaO 的吸收存在不确定性。这项工作旨在通过一系列实验来澄清氧化铝夹杂物对 CaO 的吸收。首先，通过进行两个类似的实验来检查硅在从炉渣中转移钙中的作用：一个没有添加任何硅，第二个添加 1 wt pct 电子级硅。其次，通过在 ZrO2 和 CaO-3 pct ZrO2 坩埚中进行实验来测试坩埚的作用。发现当反应开始时炉渣中没有二氧化硅时，硅的添加显着提高了 CaO 的吸收率。发现坩埚对 CaO 吸收的影响比 1 wt pct 硅添加的影响要弱。