CAJ | 학술논문

采用还原焙烧-磁选工艺，对铁品位31．9％，REO品位3．16％，Nb2 O5品位2．91％的稀土铌铁粗精矿进行分离回收铁和稀土、铌的研究．结果表明：在硫酸钠活性炭粉添加质量分数分别为15％和5％、还原焙烧温度为1100℃、还原焙烧时间为120 min的条件下，对稀土铌铁预富集粗精矿进行还原焙烧．然后在还原焙烧产物磨矿细度为-0．074 mm占85．4％，磁选强度为80 mT的条件下进行磁选，最终可获得铁品位89．32％、回收率91．47％的金属铁粉，稀土、铌富集物的REO ，Nb2 O5品位分别为5．36％和4．62％，回收率分别为96．09％和95．83％的指标．实现了稀土铌铁粗精矿中铁和稀土、铌的有效分离和回收．
채용환원배소-자선공예，대철품위31．9％，REO품위3．16％，Nb2 O5품위2．91％적희토니철조정광진행분리회수철화희토、니적연구．결과표명：재류산납활성탄분첨가질량분수분별위15％화5％、환원배소온도위1100℃、환원배소시간위120 min적조건하，대희토니철예부집조정광진행환원배소．연후재환원배소산물마광세도위-0．074 mm점85．4％，자선강도위80 mT적조건하진행자선，최종가획득철품위89．32％、회수솔91．47％적금속철분，희토、니부집물적REO ，Nb2 O5품위분별위5．36％화4．62％，회수솔분별위96．09％화95．83％적지표．실현료희토니철조정광중철화희토、니적유효분리화회수．
Fe ,RE ,Nb separation and recovery from RE-Nb-Fe rough concentrate with total iron grade of 31 .9% ,REO grade of 3 .16% and Nb2 O5 grade of 2 .91% was studied by reduction roasting-magnetic sepa-ration .It was found that metallic iron powder with total iron grade of 89 .32% and the iron recovery of 91 .47% were obtained when RE-NB-Fe enrichment rough concentrate was reduction roasted first at 1100℃ for 120 min using sodium sulfate dosage about 15% ,then magnetic separated using the grinding fineness of ores less than 0 .074 mm 85 .4% and the magnetic field intensity about 800 mT .REO grade is 5 .36% and Nb2 O5 grade is 4 .62% in rare earth ,niobium concentrate with the REO recovery of 96 .09%and the Nb2O5 recovery of 95 .83% .The effective separation and recovery of iron ,rare-earth and niobium from RE-Nb-Fe associated rough concentrate was carried out .