含金废渣综合回收新技术研究

针对选冶末端产生的高泥炭、碎炭末、废水沉渣、废水处理塘泥等含金废渣,研究开发了焙烧—酸浸—氰化工艺,获得了优化的工艺条件;并研究了该工艺与现有金精矿沸腾焙烧—酸浸—氰化工业生产工艺的匹配.结果表明,两种工艺能完美匹配,控制含金废渣与金精矿的合适配比,同时匹配相应的双环式雾化进料技术及焙烧气氛,Au、Cu的回收率分别达94.37％和85.07％,实现了高效、节能、环保工业化生产.

A New Comprehensive Recovery Technology for Gold- containing Waste Residue

Focusing on gold-containing waste residue produced in the terminal process of gold beneficiation and metallurgy such as high carbon mud,carbon powder,waste slag and wastewater treatment pond mud etc,the technology of roasting-acid leaching-cyanidation was studied,the optimized condition was obtained and the process match with industrial technology of fluidized roasting-acid leaching-cyanidation was researched.The results showed that these two processes could match perfectly.By controlling the ratio of gold-containing waste residue to gold concentrate and matching corresponding dicyclic atomization feeding technology and calcination atmosphere,the recovery rate of Au and Cu was 94.37% and 85.07% respectively,which realized high efficiency,energy saving and environmental production.