氰化尾渣氯化焙烧回收有价金属的试验研究

The Experimental Study of Valuable Metals Recovery from Cyanidation Slag by Chloridizing Roasting

采用氯化焙烧工艺,研究从云南某黄金矿山氰化尾渣中回收有价金属的过程,主要研究内容为氯化剂用量、还原剂用量、焙烧温度和焙烧时间对有价金属挥发效果的影响,得到的最佳工艺参数为:氯化钙用量3%、还原剂9%、焙烧温度1 000℃、焙烧时间40 min,在此条件下,氰化尾渣中Au、Ag、Pb、Zn和Cu有价金属挥发率分别为81.30%、84.49%、97.59%、72.44%、66.00%。

The valuable metals recovery from cyanidation slag by chlorination roasting of one Yunnan gold mine is researched through chloridizing roasting process, the main research contents are： clorinating agent dosage, reducing agent dosage, and the effect of roasting temperature and time on volatilization, so we can get the optimal process parameters： the dosage of calcium chloride is 3%, the re- ducing agent is 9%, the roasting temperature is 1 000℃, the roasting time is 40min, under these conditions, the volatilization rate of valua- ble metals, such as Au, Ag, Pb, Zn and Cu in eyanidation slag separately are 81.30% , 84. 49%, 97.59%, 72. 44%, 66. 00%.