红土镍矿与赤泥氯化还原焙烧协同制备镍-铁精矿  

Synergistic Preparing Nickel-Iron Concentrate from Laterite-Nickel Ore and Red Mud Ore Using Chlorination Reduction Roasting

作　　者：高德强 肖军辉 李成秀[4] 钟楠岚[1,3] 邹凯 GAO Deqiang;XIAO Junhui;LI Chengxiu;ZHONG Nanlan;ZOU Kai(Sichuan Provincial Engineering Lab of Nonmetallic Mineral Powder Modification and High-Value Utilization,Mianyang 621010,China;Dongfang Boiler Co.,Ltd.,Zigong 643001,China;Key Laboratory of Ministry of Education for Solid Waste Treatment and Resource Recycle,Mianyang 621010,China;Applied Technology Innovation Center of Rare Earth Resources,China Geological Survey,Institute of Multipurpose Utilization of Mineral Resources,Chinese Academy of Geological Sciences,Chengdu 610041,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]东方电气集团东方锅炉股份有限公司,四川自贡643001 [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]中国地质科学院矿产综合利用研究所中国地质调查局稀土资源应用技术创新中心,四川成都610041

出　　处：《金属矿山》2022年第10期107-112,共6页Metal Mine

基　　金：四川省科技计划项目(编号:2022YFS0462,2021YJ0057,2021YFG0268,2022YFS0509)。

摘　　要：为综合回收红土镍矿中的镍和赤泥中的铁,利用镍元素在还原性气氛下易与铁元素生成镍-铁精矿的特性,将云南某红土镍矿、赤泥、氯化钙和焦炭按照一定比例混匀后置入焙烧炉中进行氯化还原焙烧,焙烧矿水淬冷却后置入湿式磨矿机磨矿至一定粒度,采用湿式磁选进一步分离得到镍-铁精矿产品。结果表明:在红土镍矿和赤泥质量比为1∶1添加,氯化钙用量为红土镍矿与赤泥总质量的40%,焦炭用量为红土镍矿与赤泥总质量的10%,焙烧温度为1100℃,焙烧时间为120 min,磁选磨矿细度为-0.056 mm占90%,磁场强度为1.28 k A/m的综合工艺条件下,获得了镍品位为5.98%、铁品位为72.37%,镍回收率为77.36%、铁回收率为62.86%的镍-铁精矿,实现了红土镍矿和赤泥中有价金属镍、铁的协同回收。In order to comprehensively recover the nickel in the laterite nickel ore and the iron in the red mud,the nickel element is easy to form a nickel-iron concentrate with the iron element in reducing atmosphere.The laterite nickel ore and red mud in Yunnan,are mixed with calcium chloride and coke in a certain proportion and placed in a roasting furnace for chlorination reduction roasting.After the roasting ore is cooled by water quenching,it is placed in a wet mill to grind to a certain particle size,and the nickel-iron concentrate product is further separated by wet magnetic separation.The results showed that the nickel-iron concentrate with nickel grade of 5.98%,iron grade of 72.37%,nickel recovery of 77.36% and iron recovery of 62.86% was obtained under the following conditions:the mass ratio of laterite nickel ore to red mud was 1∶1,the amount of calcium chloride was 40% of the mass sum of laterite nickel ore and red mud,the amount of coke was 10% of the mass sum of laterite nickel ore and red mud,the roasting temperature was 1100℃,the roasting time was 120 min,the grinding fineness of magnetic separation was 90% of -0.056 mm,and the magnetic field intensity was 1.28 kA/m.The synergistic recovery of valuable metals nickel and iron in laterite nickel ore and red mud was realized.

关 键 词：氯化还原焙烧 红土镍矿 赤泥 镍-铁精矿 

分 类 号：TD924.1[矿业工程—选矿]