难处理金矿加压预氧化扩大连续试验  

Continuous Pilot Experiment of Pressure Pre-oxidation of Refractory Gold Ore

作　　者：蔡创开 CAI Chuang-kai(State Key Laboratory of Comprehensive Utilization of Low-grade Refractory Gold Ores,Zijin Mining Group Co.,Ltd.,Shanghang 364200,Fujian,China)

机构地区：[1]紫金矿业集团股份有限公司低品位难处理黄金资源综合利用国家重点实验室,福建上杭364200

出　　处：《有色金属（冶炼部分）》2021年第6期66-71,共6页Nonferrous Metals（Extractive Metallurgy)

摘　　要：贵州水银洞金矿为含砷、炭质的"卡林型"难处理金矿,通过常规工艺处理无法产生效益,为开发这类金矿资源,通过工艺对比,选择加压预氧化工艺进行试验研究。小型试验结果表明,在推荐条件下,硫氧化率>99%,金浸出率>94%。为获得工业设计需要的研究数据,自主建设一套可连续投料的加压预氧化中试系统,并顺利完成扩大连续试验,在温度210~220℃、加压氧化60~90min,氧分压0.6~0.8MPa条件下,硫平均氧化率大于97%,金平均浸出率96%,验证了小试结论,打通了整体工艺流程,为工业应用提供了设计依据。Guizhou Shuiyindong Gold Mine is a"Carlin-type"refractory gold mine containing arsenic and carbon,which cannot produce benefits through conventional processing.In order to develop this type of gold resources,through process comparison,the pressurized pre-oxidation process is selected for experimental research.Test results of multi-factor laboratory study show that sulfur oxidation rate is >99% and gold leaching rateis>94% under the recommended conditions.In order to obtain research data required by industrial design,a set of pressurized pre-oxidation pilot system with continuous feeding is built independently and pilot test is successfully completed.Under the conditions of pressurized oxidation at 210—220℃for 60-90 min with oxygen partial pressure of 0.6-0.8 MPa,average oxidation rate of sulfur is higher than 97% and average leaching rate of gold is 96%,which verifies the conclusion of laboratory research and opens up the overall process flow.It provides an important design basis for industrial application of this process.

关 键 词：难处理金矿 加压预氧化 扩大连续试验 

分 类 号：TF831[冶金工程—有色金属冶金]