锌精矿沸腾焙烧产出的烟尘,经二次焙烧脱硫富集铅镉后,所得烟尘除含有锌、镉、铅之外,还含有砷、银、铋、铟、铊等有色金属和稀有金属。在毛主席革命路线指引下,广大职工遵照毛主席“综合利用大有文章可做”的教 After soot roasting, the soot produced by the roasting of zinc concentrates is enriched with lead and cadmium by secondary roasting and desulphurization. In addition to zinc, cadmium and lead, the soot also contains nonferrous metals such as arsenic, silver, bismuth, indium and thallium and rare metals . Under the guidance of Chairman Mao’s revolutionary line, the broad masses of workers follow the example of Chairman Mao’s “There are many articles on comprehensive utilization that can be done”