公开(公告)号：US20050118081A1

公开(公告)日：2005-06-02

申请号：US10950671

申请日：2004-09-28

申请人： G. Harris ,  Vaikuntam Lakshmanan ,  Ramamritham Sridhar ,  George Puvvada

发明人： G. Harris ,  Vaikuntam Lakshmanan ,  Ramamritham Sridhar ,  George Puvvada

IPC分类号： B01D11/00 ,  B01D11/02 ,  B01D15/00 ,  B01F1/00 ,  B03C1/00 ,  C01G3/00 ,  C01G3/04 ,  C01G5/00 ,  C01G7/00 ,  C01G9/00 ,  C01G11/00 ,  C01G13/00 ,  C01G55/00 ,  C22B3/00 ,  C22B3/04 ,  C22B3/06 ,  C22B3/10 ,  C22B3/12 ,  C22B11/00 ,  C22B11/06 ,  C22B15/00 ,  C22B17/00 ,  C22B23/00

CPC分类号： C22B23/0461 ,  C22B3/10 ,  C22B15/0069 ,  C22B15/0093 ,  C22B23/0423 ,  Y02P10/234 ,  Y02P10/236

摘要： A process for leaching a value metal from a base metal sulfide ore, comprising the step of leaching the ore with a lixiviant comprising a chloride, an oxidant and hydrochloric acid is disclosed. The leaching is controlled, by use of low concentrations of hydrochloric acid and a redox potential, to effect formation of hydrogen sulfide from the base metal sulfide ore. The hydrogen sulfide is stripped from the leach solution, thereby reducing the amount of sulfate generated in the leach to very low levels. The leaching may also be conducted to limit the co-dissolution of platinum group metals and gold with the base value metals. The leach forms a value metal-rich leachate and a solids residue. The solids residue may be subsequently leached to recover the platinum group metals and gold. The value metal-rich leachate can be is oxidized and neutralized to recover the value base metals. In an embodiment, the chloride is magnesium chloride and lixiviant solution is regenerated.

摘要翻译： 公开了一种用于从碱金属硫化物矿石中浸出值金属的方法，其包括用包含氯化物，氧化剂和盐酸的浸液浸出矿石的步骤。 通过使用低浓度的盐酸和氧化还原电位来控制浸出，从而从硫化贱金属矿石中形成硫化氢。 从浸出溶液中汽提硫化氢，从而将浸出液中产生的硫酸盐的量减少到非常低的水平。 还可以进行浸出以限制铂族金属和金与基础金属的共溶解。 浸出液形成富含金属的浸出液和固体残渣。 随后浸出固体残渣以回收铂族金属和金。 价值金属富集的浸出液可以被氧化和中和以回收碱金属的价值。 在一个实施方案中，氯化物是氯化镁，并且溶液被再生。