P_(204)与C_(5-7)羟肟酸液膜体系自湿法冶锌系统中同步迁移分别回收镓和锗(Ⅱ

Recovery of Ga and Ge from zinc hydrometallurgy system by synchronous transport in emulsion liquid membrane process(Ⅱ)

提出了乳状液膜体系自湿法冶锌系统中经一级同时分离镓和锗的新方法，建立了用 Ｐ２０４和 Ｃ５ － ７ 羟肟酸协同载体，ｐ Ｈ＝ ３ ．２ 的 Ｎ Ｈ４ Ｆ 溶液为内水相试剂，使 Ｇｅ４ ＋ 以溶液状态而 Ｇａ３ ＋ 则以 Ｇａ（ Ｏ Ｈ）３ 沉淀同步迁移进入内水相并分别回收的液膜体系，研究了影响 Ｇａ３ ＋ 、 Ｇｅ４ ＋ 迁移的各种因素，经正交实验确定了分离镓和锗的最佳液膜组成及操作条件，并用加入铁粉法除去了杂质 Ｆｅ３ ＋和 Ｃｕ２ ＋ 对 Ｇａ３ ＋ 、 Ｇｅ４ ＋ 迁移的干扰．所得镓和锗的回收率分别为９４ ．７ ％ 和９８ ．６ ％ ，纯度为９７ ．８ ％ 和９６ ．３ ％ ． Ｚｎ２ ＋ 离子损失仅２ ．１５ ％ ，回收镓和锗后的萃余液可返回冶锌系统．

A new method for separating and recovering Ga 3+ and Ge 4+ from acidic leaching solution of zinc hydrometallurgy system by one stage of emulsion liquid membrane process was proposed in this paper. P 204 +C 5-7 oximine acid was used as a synergistic carrier for synchronous transportation of Ga 3+ and Ge 4+ .NH 4F solution with pH=3.2 used as the reagent of internal aqueous phase to recover Ge 4+ in solution state and Ga 3+ was precipitated in the form of Ga(OH) 3 due to hydrolysis. Factors affecting the transport of Ga 3+ and Ge 4+ were investigated. The interference of Fe 3+ and Cu 2+ was eliminated by adding iron powder first, then under the optimum operation condition obtained by orthogonal test, 94.7% of Ga 3+ and 98.6% of Ge 4+ were recovered with only 2.15% loss of zinc.