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1. 发明申请

WO98036102A1 REFINING ZINC SULPHIDE ORES 审中-公开
标题翻译：精炼锌铁矿
公开(公告)号：WO98036102A1
公开(公告)日：1998-08-20
申请号：PCT/AU1998/000094
申请日：1998-02-17
IPC分类号： C22B5/16 , C22B19/04 , C22B19/34 , C22B19/08 , C22B19/36
CPC分类号： C22B19/24 , C22B5/16 , C22B19/04 , C22B19/34 , Y02P10/214 , Y02P10/232 , Y02P10/234
摘要： Zinc values are recovered from zinc sulphide-containing raw material feed by a process which includes the steps of smelting the raw material in the presence of a carbonaceous reductant to substantially reduce the zinc sulphide to metallic zinc, and to vaporize the zinc, thereby producing furnace gases containing zinc vapour and sulphur dioxide; and contacting the furnace gases with free-oxygen containing gas to oxidize the zinc metal and to produce zinc oxide rich crude fume in said furnace gases. The crude fume is separated from the furnace gases and collected and then mixed with concentrated aqueous ammonia/carbon dioxide solution, having a stoichiometric excess of ammonia, to produce a zinc-bearing leach liquor and to leave a solid residue. The leach liquor is separated from the residue, and ammonia then is stripped from the leach liquor to precipitate basic zinc carbonate and to leave a stripped leach liquor. The stripped leach liquor is separated from the basic zinc carbonate, and the latter is calcined to produce a purified zinc oxide product.
摘要翻译：通过包括在碳质还原剂存在下熔炼原料以将硫化锌大大降低至金属锌并使锌蒸发的步骤的方法从含硫化锌的原料进料中回收锌值，由此生成炉含有锌蒸汽和二氧化硫的气体; 并使炉气与含游离氧的气体接触以氧化锌金属，并在所述炉气中产生富含氧化锌的粗烟气。将粗烟气与炉气分离并收集，然后与化学计量过量的氨的浓氨水/二氧化碳溶液混合，以产生含锌浸提液并留下固体残余物。将浸出液与残留物分离，然后从浸出液中除去氨，沉淀碱性碳酸锌并离开剥离的浸出液。将剥离的浸出液从碱式碳酸锌中分离出来，然后煅烧后生成纯化的氧化锌产品。

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