前言个旧地区是我国主要的锡基地,锡矿中伴生有铅,重选产出的锡精矿中仍含有一定数量的铅,有的高达8%。随着原矿品位的贫化和采矿作业深部化,原矿中铅锡共生更加突出,而共生原矿分选比较困难,且选矿买收率较低,只有共选才能获得满意效果。这样精矿含铅就更高,铅、锡各达20%左右,有的含铅量 Preface Gejiu area is China’s major tin base, associated with lead in tin ore, tin concentrate re-election still contains a certain amount of lead, and some as high as 8%. With the depletion of raw ore grade and the deepening of mining operations, the coexistence of lead and tin in the ore is more prominent. However, it is difficult to separate the symbiotic ore, and the beneficiation rate is relatively low. This concentrate is even higher lead, lead, tin up to about 20%, and some lead content