摘要
钴多以伴生元素赋存于硫化铜镍矿床中,在冶炼过程中主要富集于转炉渣中。从转炉渣中回收钴,能够缓解我国钴的供需矛盾,具有显著的经济和社会效益。本文针对镍转炉的物相组成进行了系统分析,并在此基础上通过热力学分析及实验研究,实现了非熔融状态下钴、镍等氧化物的还原及富集。考察了焙烧温度、还原时间、无烟煤及氯化钙用量对各金属回收率及磁选精矿中金属含量的影响。结果表明:优化工艺条件为还原温度1050~1150℃、无烟煤用量(质量分数)10%、氯化钙用量13%、还原时间为1.5 h。在此条件下,铁、钴、镍、铜的回收率分别为51.85%、93.81%、98.32%、76.47%,在磁选精矿中的含量(质量分数)分别为45.08%、8.14%、18.70%、2.06%。
Cobalt mostly occurs in copper and nickel sulfides deposits in the form of associated element,which is mainly enriched in the converter slag during the smelting process.Therefore,recovering cobalt from the converter slag will not only relieve the contradiction between supply and demand of cobalt in China,but also has notable economic and social benefits.In this paper,the phase composition of converter slag from the nickel smelting process was systematically analyzed.Based on this,the thermodynamic analysis and experimental research were carried out.And the enrichment of cobalt and nickel was realized by non-molten reduction.During the process,the effects of the roasting temperature,reduction time,the dosage of anthracite and calcium chloride on the recoveries of Fe,Co,Ni,Cu,and the metal contents in the concentrate were investigated.The results show that the optimal reduction conditions are determined as roasting temperature of 1050−1150℃,10%of anthracite,13%of calcium chloride,and reduction time of 1.5 h,and the recoveries are Fe 51.85%,Co 93.81%,Ni 98.32%,Cu 76.47%,respectively.Accordingly,the concentrate obtained from magnetic separation contains Fe 45.08%,Co 8.14%,Ni 18.70%and Cu 2.06%.
作者
张文娟
文培成
朱纪念
陈国举
车键勇
陈军
夏柳
王成彦
ZHANG Wen-juan;WEN Pei-cheng;ZHU Ji-nian;CHEN Guo-ju;CHE Jian-yong;CHEN Jun;XIA Liu;WANG Cheng-yan(School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing,Beijing 100083,China;State Key Laboratory of Nickel and Cobalt Resources Comprehensive Utilization,University of Science and Technology Beijing,Jinchang 737100,China)
出处
《中国有色金属学报》
EI
CAS
CSCD
北大核心
2023年第3期873-885,共13页
The Chinese Journal of Nonferrous Metals
基金
镍钴资源综合利用国家重点实验室资助项目(JKY2019-10)
国家自然科学基金资助项目(51804029)
中央高校基本科研业务经费资助项目(FRF-TT-20-02)。
关键词
含钴转炉渣
非熔融还原
氯化钙
钴回收
cobalt-bearing converter slag
non-molten reduction
calcium chloride
recovery of cobalt
