A thermogravimetric study of oxidation of sulfide ore powders subjected to slow quasi-steady heating from 20 to 1000 °C is performed. Experiments on rapid shock wave and explosive heating of air suspensions of ore powders are carried out for modeling conditions of ore extraction in mines. Propagation of incident and reflected shock waves in air suspensions of fine-grained sulfide ores with particle sizes of 1–5 µm and volume density of 40–920 g/m³ is experimentally studied. Data on the dynamics and structure of incident and reflected shock waves are obtained for various values of the bulk density of the mixture. The changes in the weight percentage of ores are determined for samples subjected to quasi-stationary heating from 20 to 1000 °C. Shock waves were used to study the dynamic explosiveness of air suspensions of fine-grained sulfide ores. The changes in the fractions of chemical elements and compounds in ore powders after passage of shock waves are determined by X-ray diffraction analysis. It is shown that the amount of pyrrhotite in air suspensions of ore particles subjected to shock loading decreases. The fraction of sulfur in the ore samples considered in the present study is smaller than 32%; these samples are not dangerous from the explosion viewpoint.

进行了热重分析，研究了硫化矿石粉末在20到1000°C的缓慢准稳态加热下的氧化情况。为了模拟矿山中的矿石提取条件，进行了矿粉空气悬浮液的快速冲击波和爆炸加热实验。粒度为1–5 µm，体积密度为40–920 g / m ³的细粒硫化矿空气悬浮液中入射和反射冲击波的传播经过实验研究。对于混合物的堆积密度的各种值，获得了有关入射和反射冲击波的动力学和结构的数据。确定样品在20到1000°C之间经受准静态加热后矿石重量百分比的变化。冲击波用于研究细粒硫化矿矿石的空气悬浮液的动态爆炸性。通过X射线衍射分析来确定冲击波通过后矿石粉末中化学元素和化合物的分数的变化。结果表明，在矿石颗粒的空气悬浮液中，遭受冲击负荷的黄铁矿的数量减少了。本研究中所考虑的矿石样品中硫的含量小于32％。从爆炸的角度来看，这些样品并不危险。