某金矿预处理后炭浸法提金试验  

Research on Carbon-in-Leaching of Gold Ore after Pretreatment

作　　者：罗星[1] 李尽善 周卫宁[1] 冯吉福[1] 马荣锴[1] 

机构地区：[1]中国有色桂林矿产地质研究院有限公司,广西桂林541004

出　　处：《有色金属（冶炼部分）》2016年第9期28-30,47,共4页Nonferrous Metals（Extractive Metallurgy)

基　　金：广西科学研究与技术开发计划项目(桂科攻14122006-25);中国有色集团科技计划项目(2014KJJH02)

摘　　要：对某难处理金矿热压氧化渣进行炭浸氰化试验，考察pH、调浆时间、底炭浓度、氰化钠初始浓度、浸出时间对金浸出率的影响。结果表明，在下述最佳条件下，氰化钠的消耗仅为0．27～0．29kg／t，金浸出率为95．34％：底炭浓度60kg／t、氧化钙用量35kg／t、氰化钠初始浓度1．5kg／t、调浆时间2h、室温浸出2～4h。难处理金矿经过热压氧化预处理后炭浸法提金，具有浸出反应动力学快，浸出率高，氰化钠消耗低的特点。Residue of refractory gold ore after pressure oxidation pretreatment was leached by carbon-in- leach （CIL）. Effects of pH, slurry-mixing time, active carbon concentration, initial concentration of NaCN, and leaching time on gold leaching rate were investigated. The results show that gold leaching rate is 95. 340//00 with NaCN consumption of 0.27~0.29 kg/t under the optimum conditions including active carbon concentration of 60 kg/t, CaO consumption of 35 kg/t, initial concentration of NaCN of 1.5 kg/t, slurry-mixing time of 2 h, and leaching duration of 2-4 h at room temperature. This process has the advantages of fast reaction kinetics, high gold leaching rate, and low consumption of NaCN.

关 键 词：难处理金矿 热压氧化 炭浸法(CIL) 

分 类 号：TF831[冶金工程—有色金属冶金]