氮气保护分级式冲击磨制备硫磺粉体

Preparation of sulfur powder by staged impact grinding with nitrogen protection

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 k Pa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d_(50)为15~25μm,单位电耗小于83.601 kWh/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150μm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,150μm筛余物质量分数为0.74%,粒径d50为24.50μm,单位电耗为65.77 kW·h/t。

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.