首页>
外国专利>
PROCESS FOR LEACHING GOLD AND/OR SILVER FROM ORES OR ORE CONCENTRATES AND FROM NOBLE-METAL WASTE OR NOBLE-METAL SCRAP BY USING CYANIDE-CONTAINING LEACHING SOLUTIONS
PROCESS FOR LEACHING GOLD AND/OR SILVER FROM ORES OR ORE CONCENTRATES AND FROM NOBLE-METAL WASTE OR NOBLE-METAL SCRAP BY USING CYANIDE-CONTAINING LEACHING SOLUTIONS
In the process for leaching gold and/or silver from ores or ore concentrates by using cyanide-containing leaching solutions by adding an aqueous H2O2 solution, it is provided for accelerating the leaching process that the total quantity of the hydrogen peroxide solution required for the leaching step is added to the leaching pulp at the start of leaching, the quantity of the H2O2 solution being determined in such a way that the H2O2 is added at 0.6 to 2.5 times the stoichiometric ratio relative to the cyanide concentration of the leaching pulp. At the same time, the pH of the leaching pulp is adjusted to and maintained at between 7 and 10 or 11 and 13.
展开▼
机译:在通过使用含氰化物的浸出溶液通过添加H 2 O 2水溶液从矿石或精矿中浸出金和/或银的方法中,提供用于加速浸出过程的是浸出所需的过氧化氢溶液的总量。在浸出开始时将步骤添加到浸出纸浆中,确定H2O2溶液的量,使H2O2的添加量相对于浸出纸浆中氰化物浓度的化学计量比为0.6至2.5倍。同时,将浸出纸浆的pH调节至并保持在7至10或11至13之间。
展开▼