硫化铁氧化及聚热过程影响因素

Oxidation and Effect Factors for Heat Gathering of Iron Sulfide

采用自然环境中氧化试验装置,研究了硫化铁的自然氧化进程,根据硫化铁在自然环境中氧化进程的特征,提出了其氧化过程可以分为表层自热期、潜伏期以及加速氧化期3个阶段。热量积聚在硫化铁自燃进程中起着关键性的作用。此外,又研究了原油、水分以及硫单质等因素对热量积聚过程的影响。结果表明,原油对热量积聚具有双重影响;水分对于自燃具有抑制作用;硫磺对硫化铁自燃初期影响比较小,后期主要起到外部热源的作用。

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.