摘要
采用沉矾浸出法将铁质矿浸出液对镁质矿进行沉矾浸出。结果表明:镁质矿酸浸过程中,在镁质矿粒度为106～150μm、搅拌强度为150 r/min、终点pHe值为1.3、温度为95℃的条件下,浸出镁质矿3 h,镍、镁、铁的浸出率分别为93.34%、78.28%、26.4%;在沉矾浸出过程中,在反应温度为95℃、搅拌强度为150 r/min、硫酸钠中的钠与形成黄钠铁矾中的钠的摩尔比x为1.3、镁质矿粒度为106～150μm、反应终点pHe为1.3±0.2的条件下,沉矾浸出5 h,镍浸出率能达到92%,镁浸出率在74%以上,铁质矿浸出液除铁率达到87%以上,铁质矿浸出液中铁的浓度在15.87～42.16 g/L的范围内,对镁质矿的镍、镁浸出及铁质矿浸出液中Fe的浓度没有显著的不利影响,溶液中铁基本上控制在4 g/L以下。
Garnierite was leached with pregnant solution of leaching limonitic by Na-jarosite precipitation.The results show that,during the process of leaching garnierite with acid,the leaching rates of Ni,Mg and Fe are 93.34%,78.28% and 26.4% under the conditions of garnierite ore size between 106 μm and 150 μm,end pH of leaching 1.3,leaching time 3 h,temperature 95 ℃ and stirring rate 150 r/min.During the process of leaching garnierite with pregnant solution of leaching limonitic,the leaching recoveries of Ni and Mg are 92% and above 74%,respectively,when the molar ratio of Na of sodium sulfate added to that of Na-jarosite precipitation is 1.3.Fe removal efficiency is more than 87%.When Fe concentration is 15.87-42.16 g/L,there is little effect on leaching recoveries of Ni and Mg.Moreover,Fe concentration is almost less than 4 g/L.
出处
《中国有色金属学报》
EI
CAS
CSCD
北大核心
2011年第11期2964-2970,共7页
The Chinese Journal of Nonferrous Metals
基金
国家重点基础研究发展计划资助项目(2007CB613603)
关键词
过渡层
红土镍矿
镁质矿
镍的浸出率
黄钠铁矾沉淀
transition layer
nickel laterite ores
garnierite
nickel leaching rate
Na-jarosite precipitation
