Ladle furnace slag disintegrates into fine powder during cooling due to phase transformations of di-calcium silicate. This creates an adverse impact on working conditions and the environment by dust generation. In this paper, a short overview on different studies to overcome the disintegration problem is provided. An attempt was also made to study the effects of several different additives and their mixtures on disintegration of slag. Phase equilibria calculations were carried out for some additives using FactSage^® to understand the phase changes in the slag. Based on the phase equilibria calculations and literature data, initial laboratory experiments were conducted at 1650 °C with different additives such as boric acid, aluminium, and fly ash. Slag samples were analyzed with X-ray fluorescence and X-ray powder diffraction for chemical and phase analysis before and after treatment. The disintegration of slag can be prevented either by addition of 0.5 wt% or more of boric acid or 9 wt% of aluminium or 6 wt% of fly ash or 4–8 wt% fly ash along with 0.125–0.25 wt% of boric acid in slag. Based on the optimized conditions, industrial trials were conducted.

中文翻译：

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不同添加剂稳定钢包炉渣的研究

钢包炉渣在冷却过程中由于硅酸二钙的相变而分解成细粉。这会因产生灰尘而对工作条件和环境产生不利影响。在本文中，简要概述了克服崩解问题的各种研究。还试图研究几种不同的添加剂及其混合物对炉渣崩解的影响。相平衡的计算进行了使用FACTSAGE一些添加剂^®了解炉渣的相变。根据相平衡计算和文献数据，在1650°C下使用不同的添加剂（例如硼酸，铝和粉煤灰）进行了初始实验室实验。在处理之前和之后，用X射线荧光和X射线粉末衍射对矿渣样品进行化学和相分析。可以通过添加0.5 wt％或更多的硼酸或9 wt％的铝或6 wt％的粉煤灰或4–8 wt％的粉煤灰以及0.125–0.25 wt％的硼酸来防止炉渣的分解在炉渣中。基于优化条件，进行了工业试验。