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硅粉是铁合金厂在硅铁和工业硅冶炼过程中产生的一种以SiO_2为主要成分的细微烟尘,又称冷凝硅粉。冶炼硅铁过程中要经常捣炉,使料层保持良好的透气性,因而有大量烟尘产生,每冶炼1吨硅铁可产生200～300kg烟尘。目前,国内对硅铁电炉的污染控制和烟尘回收利用,由于技术难度大和费用高等因素,还处于开始阶段。上海铁合金厂为了能有效地对硅铁电炉开展治理和积累经验,于1983年在一台2700kVA工业硅电炉上建了一座大型反吹正压式玻璃纤维过滤器。
Silica fume is a kind of fine dust with SiO 2 as the main component produced by ferroalloy factory in the ferrosilicon and industrial silicon smelting process, also called condensed silicon powder. In the process of smelting ferrosilicon, the furnace is often smashed to make the material layer maintain good air permeability, so that a large amount of soot is produced. Each smelting of 1 ton of ferrosilicon can produce 200 to 300 kg of soot. At present, the pollution control and smoke recycling of ferrosilicon furnaces in China are still at the initial stage due to technical difficulties and high costs. In order to effectively manage and accumulate experience in ferrosilicon furnaces, the Shanghai Ferroalloy Plant built a large-scale reverse-bleed positive pressure glass fiber filter on a 2700kVA industrial silicon furnace in 1983.