高砷难处理金矿生物搅拌预氧化工艺研究  

Biological Pre-oxidation of Refractory Gold Ores Containing High As

作　　者：衷水平 

机构地区：[1]紫金矿业低品位难处理黄金资源综合利用国家重点实验室,福建厦门361006

出　　处：《有色冶金设计与研究》2011年第2期16-18,共3页Nonferrous Metals Engineering & Research

基　　金：国家重点基础研究发展计划项目(NO.2010CB735502)

摘　　要：研究了矿浆浓度、氧化时间、充气量和氧化过程pH值对某高砷难处理金矿生物搅拌预氧化工艺的影响。结果表明,在矿浆浓度17%、氧化时间7 d、搅拌速度300 rpm、温度40℃、充气量0.4 m3.L-1.h-1、初始pH=2.0、细菌转接量10%,氧化过程不控制pH值时,硫化物氧化率为80.95%,金的浸出率为82.31%。氰化尾渣中硫化物包裹金占其中总金的53.53%,氧化废液中和可使各种有害金属离子达标排放。The influence of pulp consistency,oxidation time,aeration quantity and pH value on biological pre-oxidation treatment of a refractory gold ores containing high As was investigated.The results indicate that the oxidation ratio of sulfide is 80.95% and the leaching rate of gold is 82.31% when the pulp consistency is 17%,oxidation time is 7 days,agitation speed is 300 rpm,temperature is 40 ℃,aeration quantity is 0.4m3·L-1·h-1,initial pH is 2.0,bacteria quantity is 10% and the pH value is not controlled during the process.The gold packed by sulfide in cyanide residue is 53.53% of total gold and harmful metal ions can be treated to meet standard requirement by neutralizing the waste fluid of oxidation.

关 键 词：高砷金矿 生物预氧化 硫氧化率 金浸出率 

分 类 号：TF031[冶金工程—冶金物理化学]