The mineralogical characteristics the lead ore in our area of work has shown that the occurrence of the Lead (Pb) and Zinc (Zn) are side by side. Separating Pb form Zinc in raw material is almost impossible. Selective mining and careful selection on the ore has proved our maintaining ore quality at level of 40%-50% of Pb + Zn together. However, for the sake of quality assurance, we would only guarantee our lead ore quality is above 30% total Pb + Zn. Some random samplings has shown that the content of Pb is sometimes higher than Zn and sometimes Pb is lower than Zn.
