水在金属硫化矿体自燃中的作用

ROLE OF WATER IN SPONTANEOUS COMBUSTION OF METALLIC ORE BODY

金属硫化矿物氧化起因于硫化矿石固液相界面的电化学反应。水是硫化矿石自热、自燃的关键。注水、石灰水及其他阻化剂的阻燃方法忽视了水溶液中游离氧在硫化矿物氧化过程中所起的巨大作用，因而收效甚微。注水对自燃的矿石有一定的物理降温作用，但对未燃矿石则起了电化学升温作用，对深部矿体则起了预热预氧化作用。

The following ideas have been gotten via many investigations and detail discussions on the spontaneous combustion and the extinguishment of metallic ore body: the spontaneous combustion of metallic sulphide results from the electrochemical reaction taking place at the interface between the solid and liquid facies of ore, and water is a key factor for spontaneous combustion and heating of ore. The combustion resisting methods of injecting water, lime water and other react resisting agents failed to play a good role in extinguishing fire because the role of isolated oxygen in liquid was not considered. Although water can decrease temperature, it can also catalyse ore spontaneous combustion, and can preheat and pre oxidize the deeply burried ore bodies, and the latter role of water surpasses the former.