从包钢强磁尾矿中回收稀土和铌的研究

Study on recovering rare earth minerals and niobium mineral from strongly magnetic tailings in Baotou Mineral Processing Plant

采用以浮选为主的联合流程，从强磁尾矿中综合回收稀土和铌是比较有效的工艺．先用浮选方法，以Ｓ１ 和Ｈ２０５为组合捕收剂，选出稀土精矿．再采用浮—磁—重联合流程，从浮稀土的尾矿中选出铌．在强磁尾矿含ＲＥＯ ８．５％ ，Ｎｂ２Ｏ５ ０．１２５％ 的情况下，采用该工艺获得稀土精矿含ＲＥＯ ３６．７０％ ，回收率５７．３４％ ；铌精矿１ 含Ｎｂ２Ｏ５ １．６６％ ，铌精矿２含Ｎｂ２Ｏ５ ０．５９％ ，铌总回收率３５．５８％ ．

The combined process flow taking flotation as dominance to recover rare earth and niobium comprehensively from the strongly magnetic tailings is an effective process. Firstly, flotation is taken to separate out the rare earth concentrate with S\-1 and H\-\{205\} as combined collector. After that, the flotation\|magnetic separation\|gravity separation combined process flow is used to obtain niobium from the tailings. Under the condition that the strongly magnetic tailings contain REO 8\^5%, Nb\-2O\-5 0\^125%, the grade of so obtained RE concentrate is REO 36\^70% with the recovery of 57\^34%; the grade of Nb concentrate 1 is Nb\-2O\-5 1\^66% and the grade of Nb concentrate 2 is Nb\-2O\-5 0\^59%; the total Nb recovery is 35\^58%.