Dissolution Kinetics of Titanium in Carbon-Saturated Iron

摘要

Adding titanium ore in the blast furnace is an efficient method to prolong its hearth life. The content of titanium is important for prolonging blast furnace life. In this study, the dissolution kinetics of titanium in carbon-saturated iron was studied. The carbon-saturated pig iron was heated to 1200, 1250 and 1300 °C, respectively, and then an appropriate amount of titanium-iron alloy powder was added. After a certain period of time, a quartz tube was used to take out the samples from the molten iron and the solubility of titanium was measured by an inductive coupled plasma emission spectrometer (ICP). By fitting the experimental results with different solid-liquid reaction kinetics models, the limiting step of the whole process was determined. The results show that in the process of dissolution the mass diffusion is the limiting step. According to the Arrhenius empirical equation, the activation energy of the dissolution is about 450.96 kJ/mol.