Oxidation and effect factors for heat gathering of iron sulfide

Oxidation process of iron sulfides was observed by installation of oxidation experiment. Oxidation process of iron sulfide can be divided into three stages: surface layer self-heating period, incubative period and accelerative oxidation period. Heat gathering was the key factors for iron sulfide self-ignite. Effects of oil, water content and sulfur on heat gathering were explored using oxidation experiment installation. The results show that oil has complicate effect on self-ignite of iron sulfide. Water content can prevent iron sulfide from oxidizing. Sulfur has a little effect on initial stages of self-ignite, while in the final stage it can be as external heat source.