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1. 发明授权

US07559972B2 Process for enhanced acid leaching of laterite ores 失效
标题翻译：红土矿石酸浸提高工艺
公开(公告)号：US07559972B2
公开(公告)日：2009-07-14
申请号：US11838307
申请日：2007-08-14
申请人： Houyuan Liu , Damien Gary Ignatius Krebs
发明人： Houyuan Liu , Damien Gary Ignatius Krebs
IPC分类号： C22B23/00
CPC分类号： C22B23/043 , C22B23/0461
摘要： A process is described for the recovery of nickel and cobalt from a nickeliferous laterite ore including the steps of: providing a nickeliferous laterite ore and separating that ore into its low magnesium limonite fraction and high magnesium saprolite fraction; treating the limonite fraction in acid solution in a primary high pressure leach step to produce a primary leach slurry; adding the saprolite fraction to the primary leach slurry to initiate precipitation of iron as goethite and/or hematite, while simultaneously releasing further acid from the iron precipitation, to effect a secondary atmospheric leach step, producing a secondary leach slurry; wherein all water used to prepare the ore slurries and/or acid solutions has an ionic composition that substantially avoids jarosite formation.
摘要翻译：描述了用于从含镍红土矿石回收镍和钴的方法，包括以下步骤：a）提供含镍红土矿石，并将该矿石分离成其低镁褐铁矿部分和高镁腐泥土部分; b）在初级高压浸出步骤中在酸性溶液中处理褐铁矿部分以产生初级浸提浆料; c）将腐泥土部分加入到初级浸出浆料中以引发铁作为针铁矿和/或赤铁矿沉淀，同时从铁沉淀物中释放进一步的酸，进行次级大气浸出步骤，产生次级浸提浆料; 其中用于制备矿浆和/或酸溶液的所有水具有基本避免黄钾矾形成的离子组成。

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