焙烧氰化尾渣综合利用与新工艺探讨  

Comprehensive Utilization of Roasting Cyanide Tailings and Discussion on New Technology

作　　者：党晓娥[1] 刘安全 DANG Xiao-e;LIU An-quan(Key Laboratory for Gold and Resources of Shaanxi,Xi'an University of Arch lecture and Technology,Xi'an 710055,China)

机构地区：[1]西安建筑科技大学陕西省黄金与资源重点实验室,西安710055

出　　处：《有色金属（冶炼部分）》2020年第9期97-105,114,共10页Nonferrous Metals（Extractive Metallurgy)

基　　金：国家自然科学基金资助项目(51974221)。

摘　　要：氰化尾渣是难处理金矿经焙烧氰化浸出后的产物,含有金、银、铁等有价金属及微量氰,必须对其进行无害化处置和资源化利用。焙烧过程由于部分铁物相发生熔融或再结晶,导致部分金被致密赤铁矿二次包裹,要回收其中的金,最有效的途径是破坏包裹金的赤铁矿。在分析现有氰化尾渣无害化处置方法以及破坏包裹金赤铁矿方法研究与工艺应用现状的基础上,针对现有工艺将氰化尾渣无害化处置和除铁两工序分开的弊端,提出将氰化尾渣除铁和脱氰两过程合并进行以及浸出液光催化降解氰的新工艺,并对新工艺进行探索研究。Cyanide tailing is a product of the refractory gold ore roasted and leached with cyanide,which contains valuable metals such as gold,silver and iron,as well as trace cyanide.It is necessary to carry out harmless disposal and comprehensive utilization.Due to melting or recrystallization of some iron phases during roasting,some gold is wrapped by dense hematite for the second time.Hematite must be destroyed and the wrapped gold can be recycled.Based on analysis of the current research and application status of harmless disposal methods of cyanide tailings and methods of destroying hematite,and aiming to address disadvantages of individual processes of harmless disposal and iron removal of cyanide tailings,a new technology of combining the above mentioned two individual processes and photocatalytic degradation of cyanide by leachate is proposed and explored by experiment.

关 键 词：氰化尾渣 无害化 赤铁矿 综合利用 光催化 

分 类 号：TF831[冶金工程—有色金属冶金] X758[环境科学与工程—环境工程]