铅鼓风炉烟灰中含有多种有价金属,是回收镉的重要原料,其主要化学成分为(%):Pb52,Zn13.05,Cu0.58,Cd9.5,S5.71,As1.32,Sb0.48。以前,我厂的铅鼓风炉烟灰是送镉工段进行硫酸化焙烧,再用湿法处理回收镉;要求烟灰含镉>8%。含镉<8%的烟灰返回铅烧结-鼓风炉循环富集。每返回一次,损失镉26.3%,铅也有一定损失;且硫酸 Lead blast furnace ash contains a variety of valuable metals, is an important raw material recovery of cadmium, the main chemical composition (%): Pb52, Zn13.05, Cu0.58, Cd9.5, S5.71, As1.32, Sb0 .48. In the past, the lead blast furnace soot in our factory was sent to the cadmium section for sulfation roasting, and then the wet treatment was used to recover the cadmium. The requirement for soot containing cadmium was> 8%. Soot with cadmium <8% returns to lead sinter - blast furnace for enrichment. Each return, loss of cadmium 26.3%, lead also have some losses; and sulfuric acid