摘要：针对硫磺粉的易燃易爆特性，采用 LNI-330A 型氮气保护分级式冲击磨粉碎硫磺，并对其进行工业试验。结果表明：运行过程中，系统压力分布为-1.1～12.8 kPa 时，系统氧含量可稳定在 2%左右；调节分级机的转速为 150~1 200 r/min，硫磺粉体成品产量为 750~1 500 kg/h，粒径 d₅₀ 为 15~25 μm，单位电耗小于 83.601 kW h/t；转速大于 450 r/min 时，达到橡胶用不溶性硫磺技术指标，即粒径为 150 μm 的筛余物质量分数≤1%；综合考虑工业要求，得到冲击磨制备硫磺粉体的最优分级机转速为450 r/min，成品产量为 1 375 kg/h，150 μm 筛余物质量分数为0.74%，粒径 d₅₀ 为 24.50 μm，单位电耗为 65.77 kW·h/t。

关键词：氮气保护；分级式冲击磨；硫磺粉；氧含量；能耗

Abstract：In view of sulfur powder's characters of being flammable and explosive, sulfurs were grinded by using LNI-330 A nitrogen protection classify-impact mill and industrial tests were carried out. The results show that during the operation, the system pressure distribution is from -1.1 kPa to 12.8 kPa, under which the oxygen content can be stabilized at about 2%. Adjusting the rotation speed of classifier from 150 to 1 200 r/min, the finished product yield of sulfur powder is 750~1 500 kg/h, the particle size of d₅₀ is in 15~25 μm, and the unit power consumption is less than 83.601 kW h/t. When the rotation speed is above 450 r/min, the technical specification of insoluble sulfur for rubber is reached, the mass fraction of 150 μm sieve residue is less than or equal to1%. Considering the industry requirements, the optimum classifier speed of LNI-330 A nitrogen protection classify-impact mill for preparation of sulfur powder is 450 r/min, the finished product yield is 1 375 kg/h, the mass fraction of 150 μm sieve residue is 0.74%, the particle size of d₅₀ is 24.50 μm, and the unit power consumption is 65.77 kW h/t.

Keywords: nitrogen protection；classify-impact mill；sulfur powder；oxygen content；power consumption