Fe（OH）3的高温硫腐蚀产物氧化自燃性影响因素研究

The reaction of Fe (OH) 3 with sulfur was studied at 240℃~360℃. The sulfidation products were analyzed by XRD. The results showed that the main component of the products is FeS2 for high temperature sulfideation of Fe(OH)3. And the oxidation of sulfidation products was carried out in air at constant temperature. The influence of sulfidation temperature and time, oxidation temperature and existence of water on the pyrophoric tendency of the sulfides was investigated. The results revealed that the sulfidation products have great pyrophoric tendency at 95℃. With the increase of sulfidation temperature, oxidation temperature and sulfidation time the pyrophoric tendency increased. It is easier to induce ignition of oil due to the exthemic heat of the oxidation reaction. The existence of water has remarkable influence on the pyrophoric tendency of sulfides formed by high temperature sulfidation of Fe(OH)3.