Abstract
The isothermal precipitation kinetics of perovskite crystals was studied to clarify the mechanism for the influence of the steel slag content on the shape transformation of perovskite crystals. The results show that the growth index n were about 1.5, 2.5, and 2.5 when the contents of steel slag were 15, 25, and 35%, indicating that the precipitation of perovskite crystals was one-dimensional, three-dimensional, and three-dimensional growth. Thus the shapes of the perovskite crystals were dendritic, spherical, and spherical when the contents of steel slag were 15, 25, and 35%. An increase in the content of steel slag can promote the transformation of perovskite crystals into sphere, which is beneficial to the settling of perovskite crystals in molten slag. It realizes the conversion of perovskite from lean ore to rich ore, and avoids subsequent beneficiation process.