某黄金冶炼厂氰化尾渣综合利用研究

研究了氰化提金的尾渣多元素回收利用技术和铜尾浮选出的硫精矿直接焙烧生成铁精粉等集成化技术，通过浮选试验和焙烧试验可以发现在合适的工艺条件下，可以达到氰化尾渣中有价多元素的有效回收和有望在工业中实现高品位的硫铁矿直接焙烧生成合格铁精粉，最终可获得含Pb品位为30.29%，回收率为70.12%的铅精矿，含Zn品位为 41.19%，回收率为74.93%的锌精矿，含铜7%的铜精矿和含硫40%～50%的硫精矿；在最佳的硫铁矿入炉品位、粒度、富氧程度下，可获得全铁品位65%以上的铁精粉，为黄金行业向清洁无废化方向发展提供了新的途径。

Research on the Comprehensive Utilization of Cyanidation Slags of a Gold Smelter

The paper studies the integral technology of the multi-element recovery and utilization of the slags from cyanidation for gold extraction and the iron powder concentrate generation by direct roasting of sulfur concentrate from the flotation of copper tailings. It is found through flotation roasting tests that under appropriate process conditions, the effective recovery of multiple valuable elements in the cyanidation slags can be achieved and it is expected to realize the production of qualified iron powder concentrate by direct roasting of high grade pyrite ore at industrial scale. A lead concentrate grading 30.29% at a recovery of 70.12%, a zinc concentrate grading 41.19% at a recovery of 74.93%, a copper concentrate grading 7% and a sulfur concentrate grading 40%～50% can finally be obtained. When the pyrite feed to the roaster has the optimal grade and size and the oxygen enrichment degree is the best, an iron concentrate powder grading over 65% can be obtained, providing a new way for the gold industry to develop toward waste-free direction.