低品位钼精矿热压碱浸—浮选工艺回收钼试验  

Recovery of Low-grade Molybdenum Concentrate by Alkali Pressure Oxidation and Flotation Process

作　　者：伍赠玲[1] 石仑雷 WU Zeng-ling;SHI Lun-lei(State Key Laboratory of Comprehensive Utilization of Low-Grade Refractory Gold Ores,Zijin Mining Group Co.Ltd.,Xiamen 361101,Fujian,China;Musonoie Mining Global Simplified Corporation,Kolwezi City,Democratic Republic of Congo)

机构地区：[1]紫金矿业集团股份有限公司低品位难处理金矿资源综合利用国家重点实验室,福建厦门361101 [2]穆索诺伊矿业简易股份有限公司,刚果(金),科卢韦齐市

出　　处：《有色金属（冶炼部分）》2019年第7期54-57,77,共5页Nonferrous Metals（Extractive Metallurgy)

基　　金：国家自然科学基金青年科学基金资助项目(51504071)

摘　　要：针对非标钼精矿,利用热压碱浸过程中硫剧烈氧化释放热量进行自热反应,在碱用量为钼精矿质量的1.2%、液固比7、搅拌强度750r/min、充氧气、总压1.6MPa、温度160℃条件下浸出2h,钼浸出率为96.94%,氧化渣含钼可降到5%左右。自热氧化渣经一次粗选一次扫选两次精选后,可获得产率15.30%、钼品位36.30%、回收率89.18%的钼精矿,浮选尾矿钼品位可降到0.40%。氧化渣浮选精矿按50%比例返回自热浸出,钼浸出率可达96.17%。自热浸出—浮选联合工艺可将钼精矿中钼的回收率提高到99.48%以上。Aiming at non-standard molybdenum concentrate,autothermal reaction was carried out by using heat released from intense oxidation of sulfur in alkali pressure oxidation process.Molybdenum grade in oxidized residue drops to 5%and molybdenum extraction rate is 96.94%after leaching for 2 hours at 160℃under the conditions including ratio of liquid to solid of 7,alkali dosage of 1.2%of mass of molybdenum concentrate,stirring strength of 750 r/min,oxygen filling,and total pressure of 1.6 MPa.Molybdenum concentrate with 15.30%yield,36.30%molybdenum grade,and 89.18%molybdenum extraction rate is obtained by flotation of autothermal oxidation residues through one roughing,one cleaning and two concentratings.Molybdenum grade in flotation tailings drops to 0.40%.With concentrate added to pressure leaching with proportion of 50%,molybdenum extraction rate is 97.20%.Overall 99.48%of molybdenum is extracted by a combined process of self-thermal pressure leaching and flotation.

关 键 词：非标钼精矿 热压浸出 自热反应 浮选 

分 类 号：TF841.2[冶金工程—有色金属冶金]