研究了从锌焙烧烟尘常压热酸浸出液中沉淀针铁矿的过程。
Precipitation process of the goethite from hot acid leaching solution of zinc concentrate roast dust was investigated.
它还可以防止一氧化碳，烟雾，氰化氢，二氧化硫，其他气体，颗粒，烟雾，烟尘，氨，氯，磷，和辐射热的危害。
It also protects against carbon monoxide, smoke, hydrogen cyanide, sulfur dioxide, other gases, particulates, fumes, soot, ammonia, chlorine, phosphine, and radiant heat.
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