The Study on Microwave Magnetic Roasting plus Magnetic Seperation and Acid Pickling to Enrich Nb of Low-grade Niobium Minerals
In present article,the low intensity magnetic separation process was studied for the low-grade niobium minerals by microwave magnetic roasting.The influence of magnetic density,particle size of grinding and dispersant addition on the magnetic separation effect of sinter ore with the best magnetisability was investigated emphatically.The results show that the iron recovery was decreased and the iron grade increased gradually with decreasing the magnetic density and particle size of grinding.The magnetic separation result of sinter ore was optimal under the magnetic density of 80KA / m and the grinding grain-size of 33 μm.Fine grinding can effectively make Fe separated () Nb,especially when the dispersant(industrial alcohol) was used in the process of magnetic separation,resulting in the improvement of the grade of iron from 57.2% to 60.5% and enrichment of Nb in the tailing ore(the grade of Nb was 5.01%).After the acid pickling of tailing ore containing Nb,the grade of Nb in the extract was improved to 12.36%,which was enriched four times more than that of low-grade niobium ore before microwave magnetic roasting.
microwave magnetic roasting low intensity magnetic separation acid pickling niobium
Jie Li Jun Wang Baowei Li Lei Wang
Inner Mongolia Key Laborotory for Utilization of Bayan Obo Multi-Metallic Resources(Elected State Key Laboratory),Inner Mongolia University of Science and Technologly,Baotou 014010,China
国际会议
沈阳
英文
17-22
2012-09-07（万方平台首次上网日期，不代表论文的发表时间）