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本工艺采用H_2(或CO)还原焙烧矿石,利用矿中的MgO 作脱硫剂,再用稀盐酸浸出过程中所产生的H_2S 经FeCl_3氧化回收为元素硫,产出的H_2气可返回使用。浸出液不经过滤即行喷雾氧化水解,使铜、镍(钴)与大量的铁和二氧化硅分离,铁呈Fe_20O_3予以回收。含铜、镍(钻)溶液经净化回收铜、钻后送电积回收镍。MgCl_2液经高温(300～400°)水解制取纯MgO 并回收HCl。
In the process, H 2 (or CO) is used to reduce and roast ore, and MgO in the ore is used as a desulfurizing agent. H 2 S generated during the leaching process of dilute hydrochloric acid is oxidized and recovered as elemental sulfur by FeCl 3, and the produced H 2 gas can be returned for use. The leachate is spray-oxidized and hydrolyzed without filtration, so that copper, nickel (cobalt) are separated from a large amount of iron and silica, and the iron is recovered as Fe_20O_3. Copper, nickel (diamond) solution was recovered after the recovery of copper, drill send power recovery of nickel. The pure MgO was recovered from the MgCl_2 solution by high temperature (300 ~ 400 ° C) hydrolysis.