This paper describes the chlorination roasting-water leaching process for the volatilization separation of gold, zinc and simultaneous vanadium recovery from carbonaceous gold ore. Chlorination roasting was conducted on carbonaceous gold ore. The chlorination residue and volatile precipitates were examined for textural and chemical properties. The results, and the thermodynamic calculations performed using HSC, showed that gold reacts directly with NaCl to produce AuCl for volatilization, promoting associated mineral FeS₂ or C. Also, ZnS can be chlorinated to produce ZnCl for volatilization directly or indirectly. FeS₂ is mainly converted into Fe₂O₃ and retained in the chlorination residue. Low-valent vanadium (V(III), V(IV)) primarily reacts with NaCl to form NaVO₃. Under optimized conditions, roasting carbonaceous gold ore with 10 wt% NaCl at 800 ℃ yielded to 92.05% gold, 92.56% zinc and ＜5% iron volatilization, respectively. After grinding the chlorination residue to < 0.074 mm particle sizes, 85.34% vanadium was recovered by water leaching extraction at 80 ℃, 10:1 liquid–solid ratio, 500 r/min stirring speed, and 4 h extraction time. The present approach may efficiently volatilize gold, zinc, recover vanadium, and separate iron from carbonaceous gold ore.

本文介绍了从碳质金矿石中挥发分离金、锌和钒同时回收的氯化焙烧-水浸工艺。对含碳金矿石进行氯化焙烧。检查氯化残留物和挥发性沉淀物的质地和化学性质。结果以及使用 HSC 进行的热力学计算表明，金直接与 NaCl 反应生成 AuCl 进行挥发，促进伴生矿物 FeS ₂或 C。此外，ZnS 可以氯化以直接或间接生成 ZnCl 进行挥发。FeS ₂主要转化为Fe ₂ O ₃并保留在氯化残渣中。低价钒(V(III)、V(IV))主要与NaCl反应形成NaVO ₃。在优化条件下，含 10 wt% NaCl 的碳质金矿石在 800 ℃ 下焙烧分别得到 92.05% 的金、92.56% 的锌和＜5% 的铁挥发。将氯化残渣研磨至<0.074 mm粒径后，在80 ℃、10:1液固比、500 r/min搅拌速度和4 h萃取时间下进行水浸萃取，回收了85.34%的钒。本方法可以有效地挥发金、锌、回收钒以及从碳质金矿石中分离铁。