Effect of Different Desulfurizers on Hot Metal Pretreatment

In the process of hot metal pretreatment desulfurization, it is necessary to add desulfurizer to promote the desulfurization reaction. At the same time, as the key to measure the sulfur content in molten iron, the study of sulfur distribution ratio is of great significance to achieve the goal of desulfurization. Based on the theoretical sulfur ratio of desulfurization molecules and the theoretical sulfur ratio of ions, this paper analyzes the factors affecting the sulfur content in molten iron, and concludes that the suitable desulfurization conditions are high temperature, low oxygen level and high oxygen anion concentration. Thermodynamic analysis and related introduction of common desulfurization are carried out, and it is pointed out that CaO–Mg composite desulfurizer has the highest removal efficiency and the lowest consumption, which is conducive to desulfurization.