Domestic sulphide mines have the following characteristics due to fire: A pyrophoric mining sulfur deposits typically contain pyrite and carbonaceous shale. The type of pyrometal ore is generally colloidal pyrite, medium-fine pyrite, and pyrrhotite; Second, from the analysis of the geological conditions of the pyrometallurgical mine, the layer of the spontaneous combustion pyrophoric deposit is mostly in the zone of the loose pyrite containing the colloidal pyrite belt or the pre-oxidation of the long geological period; 3. Most of the mines that are self-igniting and igniting are in the poorly ventilated large space, with dead colors, corners of roadways and accumulation areas with more powder ore; 4. From the perspective of mining technology, the caving mining method and other large-scale mining methods are more prone to ore spontaneous combustion fires. Because the ore does not release ore in the stope for too long, under the condition of poor heat dissipation, the ore will gather heat. Heating up and causing a fire; 5. The sulphide ore fire depends not only on the oxidative exothermic properties of the ore itself, but also on many factors such as the mining technology and the environment in which the ore heap is located; Sixth, the obvious sign of ore self-ignition is that the temperature in the ore heap rises rapidly, and a large amount of SO 2 gas is released and generates sulfur weight fog in the humid air. Sweaters Cardigans,Cardigan Children Apparel,Wool Knitted Cardigan,Kids Sweater For Boys XUANZI GARMENT CO.,LTD. , https://www.xzgirldress.com