含砷金精矿的焙烧和氰化浸出试验及焙砂和浸渣的矿物学研究  

Roasting and Cyaniding Test to Arsenic-bearing Gold Concentrate and Mineralogrical Study on Calcine and Residue

作　　者：袁朝新[1] 汤集刚[1] 

机构地区：[1]北京矿冶研究总院,北京100044

出　　处：《有色金属（冶炼部分）》2006年第5期28-30,共3页Nonferrous Metals（Extractive Metallurgy)

摘　　要：采用两段焙烧——焙砂水淬(稀酸介质)——氰化工艺从某含砷难处理金精矿中提金,提取率可达92．2％,而采用常规的焙烧——氰化浸出工艺只能达到84．5％。对焙砂及氰化渣的矿物学研究表明,残留于渣中的大多数金均以超细的不可见金粒的形式为Fe_2O_3相包裹,因此,自该类型精矿中充分回收金的前提条件是尽可能破坏Fe_2O_3相。The gold recovery can reach to 92.2 % from an arsenic-bearing refactory gold concentrate as by means of the two stage roasting-quenching （in the dilute acid solution）-cyaniding process, otherwise, only will be 84.5% under the routine roasting-cyaniding condition. The mineralogical study on the calcine and cyaniding residue indicates that the most gold remained in residue is enclosed by Fe2O3 with the ultrafine and invisible particle form, thus the promise to recover fully the gold from this species concentrate is to destroy the Fe2O3 phase as full as possible.

关 键 词：含砷金精矿 难处理金矿 焙烧 工艺矿物学 

分 类 号：TF831[冶金工程—有色金属冶金]