响应曲面法优化含镍铜尾矿还原焙烧——磁选工艺提镍  

Optimization of Nickel Extraction from Nickel-bearing Copper Tailings Using Reduction Roasting-Magnetic Separation Process with Response Surface Methodology

作　　者：陈肖汀 肖军辉 陈正义[1] 李成秀 CHEN Xiaoting;XIAO Junhui;CHEN Zhengyi;LI Chengxiu(Sichuan Provincial Laboratory of Non-metallic Mineral Powder Modification and High Quality Utilization Engineering,Mianyang 621010,China;Technological Innovation Center of Strategic Mineral Comprehensive Utilization Project,Ministry of Natural Resources,Institute of Comprehensive Utilization of Mineral Resources,Chinese Academy of Geological Sciences,Chengdu 610041,China;Solid Waste Treatment and Resource Utilization Key Laboratory of Ministry of Education,Mianyang 621010,China;School of Environment and Resources,Southwest University of Science and Technology,Mianyang 621010,China)

机构地区：[1]四川省非金属矿粉体改性与高质化利用工程实验室,四川绵阳621010 [2]中国地质科学院矿产综合利用研究所自然资源部战略性矿产综合利用工程技术创新中心,四川成都610041 [3]固体废物处理与资源化利用教育部重点实验室,四川绵阳621010 [4]西南科技大学环境与资源学院,四川绵阳621010

出　　处：《金属矿山》2024年第4期275-282,共8页Metal Mine

基　　金：中央引导地方科技发展专项(编号:2023ZYD0028);四川省科技计划项目(编号:24NSFSC2150,2022YFS0509,2021YJ0057);自然资源部战略性矿产综合利用工程技术创新中心项目(编号:CCUM-KY-2304);四川省自然资源厅项目(编号:KJ-2023-003)。

摘　　要：针对某含镍铜尾矿镍品位低、矿物组成复杂等问题,以焦炭为还原剂,NaCl、Na_(2)CO_(3)和NaClO为添加剂,采用还原焙烧方法对含镍铜尾矿进行预处理,焙烧熟料采用磁选回收镍。采用Box-Behnken响应曲面法进行试验设计并优化含镍铜尾矿还原焙烧过程中各添加剂用量,分析各因素水平间的交互作用对磁选指标的影响,并建立自变量与响应值间的数学预测模型,确定还原焙烧—磁选工艺处理含镍铜尾矿的最优工艺条件为:NaCl用量23.723%、Na_(2)CO_(3)用量14.552%、NaClO用量10%,在此条件下得到预测磁选镍精矿的镍品位为3.528%。试验结果对优化含镍铜尾矿还原焙烧工艺具有可行性。Aiming at the problems of low grade and complex mineral phase of a nickel-bearing g copper tailings,the nick-el-copper tailings were pretreated by reduction roasting method with coke as reducing agent,NaCl,Na_(2)CO_(3)and NaClO as the roasting additives.In order to improve the separation and enrichment index,the Box-Behnken response surface method was used to design the experiment and optimize the dosage of various additives in the reduction roasting of nickel-containing copper tail-ings.The influence of the interaction between the factors on the magnetic separation index was analyzed,and the mathematical prediction model between the independent variables and the response values was established.The optimal process conditions for reduction roasting-magnetic separation of nickel-containing copper tailings were determined:NaCl dosage 23.723%,Na_(2)CO_(3)dosage 14.552%,NaClO dosage 10%.Under this condition,the predicted nickel grade of magnetic separation concentrate was 3.528%.It has certain practicability and feasibility for optimizing the reduction roasting process of nickel-containing copper tailings.

关 键 词：镍 含镍铜尾矿 焙烧 磁选 响应曲面法 

分 类 号：TD927[矿业工程—选矿]