乙二醇对某铜硫金精矿酸性氧化预处理的影响  

Effect of Ethylene Glycol on Acidic Oxidation Pretreatment of Copper and Sulfur-Bearing Gold Concentrate

作　　者：马英强[1,2,3] 谢材 唐浪峰 印万忠 洪正秀[5] Ma Yingqiang;Xie Cai;Tang Langfeng;Yin Wanzhong;Hong Zhengxiu(School of Zijin Mining,Fuzhou University,Fuzhou 350108,China;Fuzhou University—Zijin Mining Group Joint Re⁃search Center for Comprehensive Utilization of Mineral Resources,Fuzhou 350108,China;State Key Laboratory of Comprehensive Utilization of Low-grade Refractory Gold Resources,Shanghang 364200,China;Zijin Mining Group Co.,Ltd.,Shanghang 364200,China;College of Geoexploration Engineering,Kimchaek University of Technology,Pyongyang 999093,Korea)

机构地区：[1]福州大学紫金矿业学院,福建福州350108 [2]福州大学—紫金矿业集团矿产资源综合利用联合研发中心,福建福州350108 [3]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 [4]紫金矿业集团股份有限公司,福建上杭364200 [5]朝鲜金策工业综合大学地质勘探学院,朝鲜平壤999093

出　　处：《金属矿山》2019年第12期88-94,共7页Metal Mine

基　　金：国家自然科学基金项目（编号：51804081）;福建省自然科学基金项目（编号：2019J01253）;矿物加工科学与技术国家重点实验室开放研究基金项目（编号：BGRIMM-KJSKL-2017-14）

摘　　要：针对国内某金精矿中金嵌布粒度细且大部分被黄铜矿、黄铁矿、毒砂包裹的现状,采用盐酸-过氧化氢-乙二醇体系对该金精矿进行氧化预处理。结果表明,在盐酸浓度0.7 mol/L,矿浆浓度40 g/L,给料细度-48μm占90%以上,矿浆温度60℃,H2O2浓度0.5 mol/L,乙二醇浓度9 mL/L的条件下,金精矿中Cu、As的溶解率分别达95.25%、99.75%,添加乙二醇使铜的溶解率增加了61.85个百分点。对添加剂乙二醇的作用过程及机理进行分析表明:乙二醇通过延迟过氧化氢的分解,促进了黄铜矿的溶解,使铜的溶解率增加。Due to the current situation that the gold is fine disseminated grains exist and large amounts of the gold mineral is wrapped by chalcopyrite,pyrite and arsenopyrite,leaching for a gold concentrate is difficult. Tests regarding acidic oxidation pretreatment in the system of HCl-H2 O2-(CH2 OH)2 were carried out. It showed that under the dosage of HCl at 0.7 mol/L,pulp density at 40 g/L,the particle size of-48 μm accounted for more than 90%,reaction temperature at 60 ℃,dosage of H2 O2 at 0.5 mol/L,dosage of(CH2 OH)2 at 9 mL/L,the dissolution rates of copper and arsenic were 95.25% and 99.75% respectively. The addition of ethylene glycol made the dissolution rates of copper increased by 61.85 percentage points. The reaction process and mechanism of ethylene glycol were analyzed: By delaying the decomposition of hydrogen peroxide,ethylene glycol promoted the dissolution of chalcopyrite,increasing the dissolution rate of copper.

关 键 词：乙二醇 铜硫金精矿 预处理 过氧化氢 黄铜矿 

分 类 号：TD926.1[矿业工程—选矿]