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南非大湖化学公司用溴酸盐-高溴化物溶液浸出矿石来回收金和银。从矿石中浸出金和银的一种水溶液是含有碱金属或碱(?)金属的溴化物、高溴化物、溴酸盐及溴的溶液,其他用 pH 为2～10。含硫化物的矿石于500℃以上焙烧,以优先氧化浸出。为提高金、银的回收率,将欲处理的矿石先用溴酸或盐酸水溶液洗涤。所用的酸溶液最好含有等量的 Br(?)0.01～10%和总的卤化物离子0.05～15%[溴酸盐/(Br_2+高溴化物)=0.05～0.8(摩尔比)]。
Great Lakes Chemical Company in South Africa leached ore with bromate-high bromide solution to recover gold and silver. An aqueous solution of gold and silver from ore is an aqueous solution of a bromide, bromide, bromide and bromide containing alkali metal or alkali metal (?), The other being pH 2-10. Sulfide-containing ores are roasted at temperatures above 500 ° C to leach preferentially. In order to improve gold and silver recovery rate, the ore to be treated is washed first with bromic acid or hydrochloric acid aqueous solution. The acid solution used preferably contains an equivalent amount of 0.01 to 10% of Br (?) And 0.05 to 15% of the total halide ion [bromate / (Br2 + high bromide) = 0.05 to 0.8 (molar ratio)].