Abstract: The refining and deep desulfurization process of ultra-low sulphur industrial pure iron was studied in this paper. The desulfurization experiments were conducted in LF and RH furnaces, comparing the desulfurization effects under different conditions and analyzing the experimental results from thermodynamic and kinetic aspects. It was found that industrial pure iron undergoes LF furnace refining to form slag for desulfurization, resulting in low content of unstable oxides (FeO+MnO) in the slag, high alkalinity of the slag, good fluidity, and significant desulfurization effect. By using the LF furnace refining and desulfurization process, the sulfur content of industrial pure iron products can reach a level within 0.001 0 %.

Key words: refined desulfurization, ultra-low sulphur, industrial pure iron, application