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公开(公告)号：US12065714B2
公开(公告)日：2024-08-20
申请号：US18122279
申请日：2023-03-16
摘要： The present disclosure is directed to a gold recovery process in which activated carbon or another carbon-based material is used to accelerate thiosulfate leaching of gold from a gold-bearing material. The present disclosure improves the overall precious metal recovery of thiosulfate refractory precious metal-bearing materials. Leaching is done by substantially simultaneously mixing a slurry containing the precious metal-bearing material, water, thiosulfate, a carbon-based material, and dissolved molecular oxygen (as the oxidizing reagent) and performing leaching in the presence of the various components for a predetermined residence time. The carbon-based material is maintained in the slurry during leaching to provide increased gold recoveries.
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公开(公告)号：US20200232065A1
公开(公告)日：2020-07-23
申请号：US16748523
申请日：2020-01-21
摘要： The present disclosure is directed to a gold recovery process in which activated carbon or another carbon-based material is used to accelerate thiosulfate leaching of gold from a gold-bearing material.
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公开(公告)号：US09790572B2
公开(公告)日：2017-10-17
申请号：US13958683
申请日：2013-08-05
发明人： Yeonuk Choi , Samir Chefai
CPC分类号： C22B11/04 , B01D11/0257 , C22B3/12 , C22B3/24 , C22B3/42 , Y02P10/234
摘要： A method and system are provided in which a gold and/or silver-collecting resin-in-leach circuit comprises both co-current and counter-current sections.
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公开(公告)号：US09194023B2
公开(公告)日：2015-11-24
申请号：US14061354
申请日：2013-10-23
发明人： Qiankun Wang , Nathan Stubina , Wayne Douglas , Todd Esplin , Jodi Esplin , Sajan Bhakta
摘要： A method to recover gold lost in roaster calcine-leach tailings, due to the formation of cyanide refractory compounds or morphologies during the roasting process. The process can include acid leaching of magnetic concentrate from roaster leach tailings, combining the acid leach slurry to the pre-acidulation tank for pressure oxidation feed, acid pressure oxidation of the pressure oxidation feed, and recovery of gold.
摘要翻译： 由于在焙烧过程中形成氰化物耐火化合物或形态，因此在煅烧煅烧矿渣中回收金的方法。 该方法可以包括从焙烧沥青尾矿中浸出浓硫酸，将酸浸浆料与预酸槽混合，进行压力氧化进料，压力氧化进料的酸压氧化和回收金。
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5.发明申请公开(公告)号：US20140356261A1
公开(公告)日：2014-12-04
申请号：US14287910
申请日：2014-05-27
CPC分类号： C22B30/04 , C01G49/0018 , C22B3/44 , C22B30/02 , Y02P10/234
摘要： The disclosure relates to the oxidation and immobilization of trivalent arsenic from arsenic-containing solutions. The process includes oxidation of trivalent arsenic (As3+) species to the pentavalent state (As5+). A carbon additive (e.g., activated carbon) and oxygen are used to promote the arsenic oxidation processes. After oxidation of arsenic to the pentavalent state, the arsenic can be removed by precipitation to ferric arsenate or calcium arsenate or other arsenic containing compounds known in the art. The oxidation of arsenic can also occur simultaneously with the production and precipitation of ferric arsenate (e.g., scorodite). Ferrous iron can be oxidized to ferric iron in the presence of activated carbon and oxygen.
摘要翻译： 本公开涉及从含砷溶液中氧化和固定三价砷。 该方法包括将三价砷（As3 +）物质氧化成五价态（As5 +）。 使用碳添加剂（例如活性炭）和氧来促进砷的氧化过程。 在将砷氧化成五价态之后，可通过沉淀砷酸砷或砷酸钙或本领域已知的其它含砷化合物来除去砷。 砷的氧化也可以与砷酸铁（例如，臭葱石）的生成和沉淀同时发生。 在活性炭和氧气存在下，亚铁可以氧化成三价铁。
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公开(公告)号：US20140112823A1
公开(公告)日：2014-04-24
申请号：US14061354
申请日：2013-10-23
发明人： Qiankun Wang , Nathan Stubina , Wayne Douglas , Todd Esplin , Jodi Esplin , Sajan Bhakta
摘要： A method to recover gold lost in roaster calcine-leach tailings, due to the formation of cyanide refractory compounds or morphologies during the roasting process. The process can include acid leaching of magnetic concentrate from roaster leach tailings, combining the acid leach slurry to the pre-acidulation tank for pressure oxidation feed, acid pressure oxidation of the pressure oxidation feed, and recovery of gold.
摘要翻译： 由于在焙烧过程中形成氰化物耐火化合物或形态，因此在煅烧煅烧矿渣中回收金的方法。 该方法可以包括从焙烧沥青尾矿中浸出浓硫酸，将酸浸浆料与预酸槽混合，进行压力氧化进料，压力氧化进料的酸压氧化和回收金。
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公开(公告)号：US10258996B2
公开(公告)日：2019-04-16
申请号：US15077718
申请日：2016-03-22
发明人： Barun Gorain
摘要： The present invention relates to flotation of sulfidic copper-molybdenum- and gold-containing minerals. More specifically, the invention relates to sulfoxy reagent-assisted floatation for separating of sulfides of copper, molybdenum and gold from pyrite, marcasite, pyrrhotite, arsenopyrite, and other gangue minerals following aerating by an oxidizing gas and contacting by a sulfoxy reagent. To promote collection and flotation the feed mineral materials are preferably not contacted with an externally generated non-oxidizing gas to lower the dissolved molecular oxygen content prior to flotation.
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公开(公告)号：US20180030571A1
公开(公告)日：2018-02-01
申请号：US15726091
申请日：2017-10-05
发明人： Yeonuk CHOI , Samir CHEFAI
CPC分类号： C22B11/04 , B01D11/0257 , C22B3/12 , C22B3/24 , C22B3/42 , Y02P10/234
摘要： A method and system are provided in which a gold and/or silver-collecting resin-in-leach circuit comprises both co-current and counter-current sections.
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公开(公告)号：US20140096649A1
公开(公告)日：2014-04-10
申请号：US14103385
申请日：2013-12-11
IPC分类号： C22B3/00
CPC分类号： C22B11/042 , C22B3/06 , C22B3/08 , C22B3/12 , C22B3/22 , C22B3/24 , C22B11/04 , Y02P10/214 , Y02P10/234 , Y02W30/54
摘要： The present invention is directed to a precious metal recovery process in which an acid sulfidic feed material is subjected to acid pressure oxidation and an alkaline sulfidic feed material is subjected to alkaline pressure oxidation, with the discharge slurries from the pressure oxidation processes being combined to reduce neutralization requirements prior to precious metal recovery.
摘要翻译： 本发明涉及一种贵金属回收方法，其中酸性硫化物进料经受酸压力氧化，碱性硫化物进料经受碱性压力氧化，来自压力氧化过程的排出浆料被组合以减少 贵金属回收前的中和要求。
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公开(公告)号：US20200377970A1
公开(公告)日：2020-12-03
申请号：US16892043
申请日：2020-06-03
摘要： The present disclosure is directed to a process for thiosulfate leaching of a precious metal-containing material and recovering a precious metal from a pregnant leach solution using a resin extractant. The precious metal is eluted from the loaded resin optionally using an eluant comprising trithionate. Various process improvements include maintaining the thiosulfate-containing leach solution substantially free of thiols and amines, maintaining a concentration of a sulfide in the thiosulfate leach solution of no more than about 100 ppm, recycling the barren resin free of contact with a sulfide, bisulfide, and polysulfide, and/or maintaining a concentration of tetrathionates, trithionates, sulfur-oxygen anions, and/or combinations thereof within about 50% of a concentration level of the one or more of tetrathionates, trithionates, sulfur-oxygen anions, the combinations thereof in the precious metal-containing solution before contact with the recycled barren resin.
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