Pyrite Desulfurization by Wet Oxidation in Alkaline Solutions

摘要

Particles of iron pyrites can be desulfurized by leaching them with a hot alkaline solution containing dissolved oxygen under pressure. As the reaction proceeds, sulfur is extracted largely as soluble sulfates and a shell of iron oxide is formed around a shrinking core of pyrite. The overall rate of the reaction seems to be controlled by diffusion of dissolved oxygen through the shell of iron oxide. (ERA citation 05:011044)