The crystallization and heat transfer of CaO–SiO₂-based slag for high-Mn–high-Al steel have been investigated by coupling composition evolution with heat transfer and non-isothermal tests. It was found that the concentrations of Al₂O₃ and MnO in the slag were determined by the relative contents of Al and Mn in molten steel. Crystallization temperature of the slag rose with the increase in Al₂O₃ content first and then fell due to the coupled effects of basicity and Al₂O₃, and a small amount of MnO cannot change this trend. High viscosity of slags led to less obvious characterizations of crystallization. The crystalline phase analysis suggested that MnO accumulation suppressed the formation of fluorite crystals. As the Al₂O₃ content increased, the precipitation of cuspidine was replaced by the blocky gehlenite crystals, while the number and the size of nepheline and fluorite crystals both increased. According to the thickness and the crystallization structure of slags, the heat flux in the slag film first decreased and then increased with higher Al₂O₃ accumulation. Then, a new type of CaO–SiO₂-based mold slag with high basicity was applied in plant trial, and the change in composition and properties of mold slag was studied.

通过将成分演化与传热和非等温试验相结合，研究了高Mn-高Al钢CaO-SiO ₂基炉渣的结晶和传热。发现钢渣中Al ₂ O ₃和MnO的浓度取决于钢水中Al和Mn的相对含量。矿渣的结晶温度随着Al ₂ O ₃含量的增加先上升，然后由于碱度和Al ₂ O ₃的耦合作用而下降。，而少量的MnO不能改变这种趋势。矿渣的高粘度导致不太明显的结晶表征。结晶相分析表明，MnO的积累抑制了萤石晶体的形成。随着Al ₂ O ₃含量的增加，cuspidine的沉淀物被块状的菱锰矿晶体代替，而霞石和萤石晶体的数量和大小均增加。根据炉渣的厚度和结晶结构，随着更高的Al ₂ O ₃积累，炉渣膜中的热通量首先下降，然后增加。然后，一种新型的CaO–SiO ₂高碱度基型渣在工厂试验中的应用，研究了渣的组成和性能变化。