铜陵天马山含砷硫金精矿酸性氧化预处理试验研究  

Research on Acidic Oxidation Pretreatment of Arsenic and Sulfur-bearing Gold Concentrate at Tianmashan Mine,Tongling

作　　者：马英强[1] 黄发兰 印万忠[1] 洪正秀[3] 

机构地区：[1]福州大学紫金矿业学院,福建福州350108 [2]紫金矿业集团股份有限公司,福建上杭364200 [3]朝鲜金策工业综合大学地质勘探学院,朝鲜999093

出　　处：《黄金科学技术》2015年第3期83-88,共6页Gold Science and Technology

基　　金：国家自然科学基金项目"贫细杂铁矿石中矿物浮选交互影响的晶体化学机理研究"(编号:51374079);福建省自然科学基金项目"含铜矿石高压辊终粉磨-浮选环境优化技术基础研究"(编号:2015J05101);福州大学科技发展基金项目"基于高压辊终粉磨技术的含铜矿石浮选环境优化机制研究"(编号:2014-XQ-41);福州大学科研启动基金项目"基于晶体化学的硫化铁矿物浮选特性研究"(编号:510057)联合资助

摘　　要：铜陵天马山含砷硫金精矿中金矿物嵌布粒度细且大部分被硫化矿包裹,致使金的氰化浸出难以进行。为了使金达到较好的浸出效果,在HCl-H2O2-添加剂体系中,对该金精矿进行了氧化预处理试验研究。在磨矿细度-0.048 mm占90%以上、矿浆浓度40 g/L、搅拌速度400 r/min、温度60℃、搅拌时间4 h、HCl浓度0.7 mol/L、H2O2浓度0.5 mol/L及添加剂乙二醇用量9 m L/L的氧化预处理条件下,Fe、As、Cu的溶解率分别为48.1%、99.3%和89.76%。金精矿经氧化预处理后,金的氰化浸出率比直接氰化浸出提高了33.6%,效果显著。该预处理方法可为同类含砷硫难选金精矿的开发利用提供一定的借鉴意义。Gold cyanide leaching for a arsenic and sulfur-bearing gold concentrate at Tianmashan,Tongling,was difficult due to the fine disseminated grain sizes and large amounts of the gold mineral wrapped by sulfides.In order to improve the efficiency of cyanide leaching,some of tests regarding acidic oxidation pretreatment in the systems of HCl-H2O2-addictive were carried out under the conditions that the proportion of grinding fineness at-0.048 mm was 90%,pulp density at 40 g/L,stirring speed at 400 r/min,reaction temperature at 60 ℃,reaction time at 4 h,dosage of HCl at 0.7 mol/L,dosage of H2O2 at 0.5 mol/L and dosage of ethylene glycol at 9 mL/L.As a result,the dissolution rates of iron,arsenic and copper were 48.1% ,99.3% and 89.76% ,respectively.What’s more,the leaching rate of cyanide leached gold increased 33.6% than that of cyanide leached directly after oxidation pretreatment to gold concentrate.It was evident that the crystal structure of sulfide was destructed after oxidation pretreatment,meanwhile,the As,Cu and other ingredients were dissolved.Thus,the gold cyanide leaching rate increased.Finally,some guidance for other similar arsenic and sulfur-bearing refractory gold concentrate processing is provided,which is expected to be meaningful for applicability and development of the oxidation pretreatment with the HCl-H2O2-ethylene glycol.

关 键 词：含砷硫金精矿 氧化预处理 HCl-H2O2 溶解率 乙二醇 

分 类 号：TF831[冶金工程—有色金属冶金]