含硫量对硫化矿粉尘云最小点火能的影响

为探究含硫量对硫化矿粉尘云最小点火能的影响,将A、B、C 3组不同含硫量的硫化矿粉尘云于20 L爆炸球中测定最小点火能。所得实验数据用点火概率(是否着火)表示最小点火能的方法,得出各组硫化矿粉尘云着火概率随点火能变化的分布曲线。通过实验得出各组硫化矿粉尘云最小点火能为:A500组3~4 k J、B500组6~8 k J、C500组>12 k J;A300组2~3 k J、B300组4~6 k J、C300组>12 k J;A200组2~3 k J、B200组6~8 k J、C200组>12 k J。结果表明:含硫量越高最小点火能越低,亦即爆炸危险性越大。

Effect of Sulfur Content on Minimum Ignition Energy of Sulfide Dust Clouds

In order to explore the influence of sulfur content on the minimum ignition energy of dust cloud in sulfide ores，three kinds of sulfide dust with different sulfur content in groups A，B and C were measured in 20 L explosion ball to determine the minimum ignition energy.The experimental data showed the minimum ignition energy by the ignition probability (whether or not the ignition)，and the distribution curve of the ignition probability of the sulfide dust cloud with the ignition energy was obtained.The experimental results showed that the minimum ignition energy of each group of sulfide dust was described as follows：3~4 kJ in group A500，6~8 kJ in group B500，C500 group＞12 kJ；2~3 kJ in group A300，4~6 kJ in group B300，group C300＞12 kJ；2~3 kJ in group A200;6~8 kJ in group B200;group C200＞12 kJ.The results show that the lower the sulfur content，the lower the minimum ignition energy，that is，the greater the risk of explosion is.