硫化矿尘云最低着火温度试验研究

利用标准测试装置Godbert-Greenwald 恒温炉对硫化矿尘进行了矿尘云最低着火温度试验研究。在设定试验条件下测试了硫化矿尘云最低着火温度，并探究了矿尘含硫量、粒度以及质量浓度对硫化矿尘云最低着火温度的影响。结果表明：A、B、C 3种硫化矿尘云最低着火温度分别为386、454、512 ℃；最低着火温度随矿尘含硫量的增加而降低、随粒径的减小而降低、随矿尘质量浓度的增加呈现先降低后升高趋势。研究结果对了解硫化矿尘云着火、爆炸危险性和指导硫化矿山安全生产具有参考价值。

Test Study on Minimum Ignition Temperature of Sulfide Ore Dust Cloud

The test study on the minimum ignition temperature of the dust cloud of sulfide ore is carried out by using the standard test device of Godbert-Greenwald constant temperature furnace.Under the given test condition,the minimum ignition temperature of sulfide dust is tested,and the influence of dust's sulfur content,particle size and mass concentration to the sulfide dust minimum ignition temperature is also analyzed.The results show that:the minimum ignition temperatures of A,B and C dust cloud samples of sulfide ore are 386,454,512 ℃ respectively;the higher the sulfur content is,the lower the minimum ignition temperature of the dust cloud of sulfide ore would be;the smaller the particle size of dust cloud,the lower the minimum ignition temperature of the dust cloud of sulfide ore would be;with the increasing of the mass concentration of the dust cloud,its minimum ignition temperature is increased first but decreased later.The above study results can provide some reference for understanding the fire and explosive risk of the sulfide dust as well as guiding the safety production of sulfide ore mines.