公开(公告)号：US3975189A

公开(公告)日：1976-08-17

申请号：US482533

申请日：1974-06-24

申请人： Leif R. Haugen

发明人： Leif R. Haugen

IPC分类号： C01G53/00 ,  C22B3/00 ,  C22B3/06 ,  C22B15/00 ,  C22B23/04 ,  C01G3/12

CPC分类号： C22B23/0423 ,  C01G3/12 ,  C01G51/30 ,  C01G53/00 ,  C22B11/04 ,  C22B15/0089 ,  C22B15/0093 ,  C22B3/06 ,  C01P2006/80 ,  Y02P10/234 ,  Y02P10/236

摘要： A method for selectively recovering metals from generally sulphidic particulate materials containing metals selected from nickel, copper and precious metals in which the particulate material is preferentially leached in an agitated chloride solution containing cuprous ions by the action of chlorine. The redox potential of the solution increases upon feeding chlorine thereto and decreases upon feeding particulate material thereto, and the rate of feeding of chlorine is controlled relative to the rate of feeding of material to control the redox potential substantially at or below a selected potential at which the metal is leached preferentially with respect to other metals in the material. Nickel is leached preferentially with respect to copper and precious metals in a matte, for example, to produce a nickel-rich solution and to concentrate the precious metals in a nickel-depleted residue. The leach residue, or other concentrates containing copper and precious metals may also be treated by the method to selectively dissolve the copper values preferentially to the precious metal values. Dissolved copper in the nickel-bearing leach solutions may be precipitated in a separate tank by agitating the leach solution in the presence of elemental sulphur and nickel sulphide particles having an atomic ratio of nickel to sulphur greater than one, thereby producing copper sulphide and a substantially copper-free nickel-chloride solution which can be separated and the values recovered by conventional means.

摘要翻译： 从含有选自镍，铜和贵金属的金属的一般硫化颗粒材料中选择性地回收金属的方法，其中颗粒材料优选在氯的作用下在含有亚硝酸根的搅拌氯化物溶液中浸出。 当向其中供给氯时，溶液​​的氧化还原电位增加，并且在将颗粒材料送入其时降低，并且相对于材料的供给速率来控制氯的供给速率，以控制基本上等于或低于选定电位的氧化还原电位， 金属相对于材料中的其它金属优先浸出。 相对于铜和贵金属优选浸出镍，例如，以产生富镍溶液并将贵金属浓缩在镍贫的残余物中。 浸出残渣或含铜和贵金属的其他浓缩物也可以通过选择性地将铜值优先溶解到贵金属值的方法来处理。 在含镍浸出溶液中的溶解的铜可以通过在原子比为镍和硫大于1的元素硫和硫化镍颗粒的存在下搅拌浸出溶液而在单独的槽中沉淀，由此产生硫化铜和基本上 可以分离的无铜氯化镍溶液，通过常规方法回收值。