摘要
针对目前红土镍矿碱法处理过程中存在的问题提出工艺改进,研究低品位红土镍矿焙烧活化-碱浸过程中含硅矿物的转化。考察了焙烧温度对红土镍矿活性的影响,探索了红土镍矿经焙烧后碱浸过程中温度、时间、搅拌强度、液固比以及碱初始质量浓度对硅转化的影响。结果表明,红土镍矿经650°C焙烧2h后,活性得到明显提高,红土镍矿经焙烧后采用初始质量浓度为60g/L的碱溶液,在搅拌速度为400r/min、浸出温度为140°C、液固比为5∶1的条件下浸出120min,硅的转化率可达89.42%。
A process improvement is proposed in view of the existing problems in alkali treating process of nickel laterite ore,and the transformation of silicon containing minerals during roasting and alkali leaching process of lowgrade nickel laterite ore is researched.The effect of roasting temperature on the activity of nickel laterite ore is studied,and the effects of different variables,such as the leaching temperature,the leaching time,the alkali initial concentration,the stirring intensity and the liquid/solid ratio on the transformation of silicon are investigated.The results showed that the activity of nickel laterite ore is improved significantly after roasting 2hat 650°C,and the transformation rate of silicon can reach 89.42% when the roasted ores are leached by an alkali solution of 60g/L initial concentration at140°C for 120 min under the condition of the stirring intensity at 400r/min and the liquid/solid ratio at 5∶1.
作者
牟文宁
崔富晖
辛海霞
滕飞
罗绍华
翟玉春
MU Wen-ning CUI Fu-hui XIN Hai-xia TENG Fei LUO Shao-hua ZHAI Yu-chun(School of Resources and Materials, Northeastern University at Qinghuangdao, Qinghuangdao 066004, Hebei, China Key Laboratory of Resources Cleaner Conversion and Efficient Utilization Qinhuangdao City, Qinhuangdao 066004, Hebei, China School of Metallurgy, Northeastern University, Shenyang 110819, Liaoning, China)
出处
《中国冶金》
CAS
2017年第4期32-36,共5页
China Metallurgy
基金
国家重点基础研究发展计划资助项目(2014CB643405)
国家自然科学基金资助项目(51204036
51234009)
河北省高等学校青年拔尖人才资助项目(BJ201604)
关键词
红土镍矿
焙烧
碱浸
含硅矿物
nickel laterite ore
roasting
alkali leaching
silicon containing minerals
