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    • 15. 发明授权
    • METAL LEACH AND RECOVERY PROCESS
    • METALLLAUGUNGS-和恢复过程
    • EP2882878B1
    • 2016-10-12
    • EP13745846.9
    • 2013-08-07
    • BASF SE
    • NISBETT, AndrewADKINS, StephenFLANAGAN, Ian JohnBERGER, Alexsandro
    • C22B3/20B01D21/01C22B15/00
    • C22B3/44B01D21/01C22B3/04C22B3/205C22B15/0084Y02P10/234Y02P10/236
    • The present invention relates to a metal leach and recovery process. The process involves subjecting a metal bearing material to a reactive process by combining said metal bearing material with a leaching agent to liberate at least one metal value and forming a first aqueous leach pulp. This first aqueous leach pulp is subjected to a solid liquid separation step thereby providing a first clarified aqueous leach solution and a second aqueous leach pulp. The first clarified aqueous leach solution is then subjected to solvent extraction thereby obtaining the first aqueous raffinate. The second aqueous leach pulp is subjected to at least two further solid liquid separation steps of which some or all are in a counter current decantation (CCD) arrangement. Each of the solid liquid separation steps of the CCD arrangement results in an aqueous liquor and aqueous suspension of solids wherein each aqueous suspension of solids resulting from each solid liquid separation step of the CCD arrangement is passed to the subsequent solid liquid separation step and the suspension of solids resulting from the final solid liquid separation step is removed from the process. Further, each aqueous liquor resulting from each solid liquid separation step of the CCD arrangement is passed to the previous solid liquid separation step. The further solid liquid separation steps result in at least one further clarified aqueous leach solution. The at least one further clarified aqueous leach solution is/are subjected to solvent extraction thereby obtaining at least one further aqueous raffinate. At least a portion of the one or more of the at least one further aqueous raffinates is fed into the final solid liquid separation is of the CCD arrangement. The process provides a flocculation system comprising either: (i) addition of an organic polymeric flocculant to or prior to at least one solid liquid separation step, which polymeric flocculant is formed from 2-acrylamido-2-methylpropane sulphonic acid (ATBS) or salts thereof as a homopolymer or copolymer with at least one water-soluble ethylenically unsaturated monomer; or (ii) addition of an organic polymeric flocculant and at least one support agent to or prior to at least one solid liquid separation step, which at least one support agent is selected from at least one of the group consisting of oxidizing agents, reducing agents, irradiation and free radical producing agents. The process provides significantly improved metal extraction and recovery.
    • 18. 发明公开
    • METAL LEACH AND RECOVERY PROCESS
    • METALLLAUGUNGS- UNDRÜCKGEWINNUNGSPROZESS
    • EP2882878A1
    • 2015-06-17
    • EP13745846.9
    • 2013-08-07
    • BASF SEBASF Schweiz AG
    • NISBETT, AndrewADKINS, StephenFLANAGAN, Ian JohnBERGER, Alexsandro
    • C22B3/20B01D21/01C22B15/00
    • C22B3/44B01D21/01C22B3/04C22B3/205C22B15/0084Y02P10/234Y02P10/236
    • The present invention relates to a metal leach and recovery process. The process involves subjecting a metal bearing material to a reactive process by combining said metal bearing material with a leaching agent to liberate at least one metal value and forming a first aqueous leach pulp. This first aqueous leach pulp is subjected to a solid liquid separation step thereby providing a first clarified aqueous leach solution and a second aqueous leach pulp. The first clarified aqueous leach solution is then subjected to solvent extraction thereby obtaining the first aqueous raffinate. The second aqueous leach pulp is subjected to at least two further solid liquid separation steps of which some or all are in a counter current decantation (CCD) arrangement. Each of the solid liquid separation steps of the CCD arrangement results in an aqueous liquor and aqueous suspension of solids wherein each aqueous suspension of solids resulting from each solid liquid separation step of the CCD arrangement is passed to the subsequent solid liquid separation step and the suspension of solids resulting from the final solid liquid separation step is removed from the process. Further, each aqueous liquor resulting from each solid liquid separation step of the CCD arrangement is passed to the previous solid liquid separation step. The further solid liquid separation steps result in at least one further clarified aqueous leach solution. The at least one further clarified aqueous leach solution is/are subjected to solvent extraction thereby obtaining at least one further aqueous raffinate. At least a portion of the one or more of the at least one further aqueous raffinates is fed into the final solid liquid separation is of the CCD arrangement. The process provides a flocculation system comprising either: (i) addition of an organic polymeric flocculant to or prior to at least one solid liquid separation step, which polymeric flocculant is formed from 2-acrylamido-2-methylpropane sulphonic acid (ATBS) or salts thereof as a homopolymer or copolymer with at least one water-soluble ethylenically unsaturated monomer; or (ii) addition of an organic polymeric flocculant and at least one support agent to or prior to at least one solid liquid separation step, which at least one support agent is selected from at least one of the group consisting of oxidizing agents, reducing agents, irradiation and free radical producing agents. The process provides significantly improved metal extraction and recovery.
    • 本发明涉及金属浸出和回收方法。 该方法包括通过将所述金属轴承材料与浸出剂组合以使金属轴承材料进行反应过程以释放至少一种金属值并形成第一含水浸出纸浆。 将该第一含水浸出纸浆进行固液分离步骤,从而提供第一澄清水溶液浸出溶液和第二含水浸提纸浆。 然后对第一澄清的含水浸出溶液进行溶剂萃取,从而获得第一含水浸膏。 经受至少两个另外的固体液体分离步骤,其中一些或全部是反向倾析(CCD)布置。 CCD装置的每个固体液体分离步骤都得到含水液体和固体含水悬浮液,其中由CCD装置的每个固体液体分离步骤得到的固体的每个含水悬浮液被传送到随后的固体液体分离步骤,悬浮液 从最终固液分离步骤得到的固体从该方法中除去。 此外,由CCD装置的每个固体液体分离步骤产生的每个含水液体被传递到先前的固体分离步骤。 进一步的固体液体分离步骤导致至少一种进一步澄清的含水浸出溶液。 对至少一种进一步澄清的含水浸出溶液进行溶剂萃取,从而获得至少一种其它含水萃余液。 至少一种其中一种或多种另外的含水溶剂的至少一部分进料到CCD装置的最终固液分离中。 该方法提供了一种絮凝体系,其包括:(i)在至少一个固体液体分离步骤之前或之前加入有机聚合物絮凝剂,该聚合物絮凝剂由2-丙烯酰氨基-2-甲基丙烷磺酸(ATBS)或其盐形成 作为与至少一种水溶性烯属不饱和单体的均聚物或共聚物; 或(ii)在至少一个固体液体分离步骤之前或之前加入有机聚合物絮凝剂和至少一种载体剂,所述至少一种载体剂选自氧化剂,还原剂 ,照射和自由基生成剂。 该方法提供了显着改进的金属萃取和回收。