The environment and human beings were polluted seriously by benzene and high dust in traditional pesticide formulation such as Emulsifiable Concentrate, Wettable Powders and Powders.
传统的农药剂型乳油、可湿性粉剂、粉剂，因剂型含有苯类及粉尘，可对环境和人员造成严重的污染和危害。
2
Precipitation process of the goethite from hot acid leaching solution of zinc concentrate roast dust was investigated.
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。
3
The roasting dust which produced from zinc concentrate roasting process, main contains zinc oxide, zinc ferrite, zinc sulfide, cadmium sulfide, lead sulfate etc.