从铌矿中直接制备铌镍合金粉前驱体试验研究
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摘要
以铌矿为原料直接制备出铌镍合金粉前驱体NiNbO_6,考察了硫酸焙烧阶段磨矿粒度、焙烧温度、焙烧时间、酸矿比、硫酸浓度对铌浸出率的影响。结果表明,最佳硫酸焙烧工艺参数为:磨矿粒度-0.025mm、焙烧温度300℃、焙烧时间3h、硫酸浓度10mol/L、酸矿比2.5,在此条件下,铌浸出率可达到94%以上,回收率达到93%。
Niobium-nickel alloy powder precursor NiNbO6 was prepared directly from niobium ore.Effects of grinding size,roasting temperature,roasting time,ratio of acid to ore,and sulfuric acid concentration on niobium leaching rate during sulfuric acid roasting were investigated.The results show that niobium leaching rate is 94%above with niobium recovery of 93% under the optimum conditions including grinding size of-0.025 mm,roasting temperature of 300 ℃,roasting time of 3h,ratio of acid to ore of 2.5,and sulfuric acid concentration of 10mol/L.
Niobium-nickel alloy powder precursor NiNbO6 was prepared directly from niobium ore.Effects of grinding size,roasting temperature,roasting time,ratio of acid to ore,and sulfuric acid concentration on niobium leaching rate during sulfuric acid roasting were investigated.The results show that niobium leaching rate is 94%above with niobium recovery of 93% under the optimum conditions including grinding size of-0.025 mm,roasting temperature of 300 ℃,roasting time of 3h,ratio of acid to ore of 2.5,and sulfuric acid concentration of 10mol/L.
引文
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[3]向仕彪,黄波,王晓辉,等.从废钨渣中酸法回收钽铌的研究[J].有色冶金设计与研究,2012,33(2):5-11.
[4]洛谢夫H A.稀有金属元素地球化学[M].北京:科学出版社,1960:155-156.
[5]杨岳清,王文瑛.福建南平花岗伟晶岩中锡石的矿物学研究[J].福建地质,2003,25(2):75-81.
[6]郭青蔚,李月南,华志强,等.草酸体系萃取自炉渣中提铌[J].有色金属(冶炼部分),1995(5):38-41.
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[8]高玉德,韩兆元,王国生.朝鲜某复杂难选钽铌锆矿选矿试验研究[J].金属矿山,2012(7):91-94.
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