公开(公告)号：US11155894B2

公开(公告)日：2021-10-26

申请号：US15761025

申请日：2016-04-28

申请人： Eldorado Gold Corporation

发明人： Roman Berezowsky ,  Paul Skayman ,  Jinxing Ji

IPC分类号： C22B1/11 ,  C22B3/22 ,  C22B3/44 ,  C22B11/00 ,  C22B3/08 ,  C22B30/04

摘要： A process for reducing arsenic content from arsenic-bearing gold concentrate or other arsenic-bearing gold materials to produce a low arsenic-bearing gold concentrate. The process may comprise adding oxygen, water, and/or acid to an acidulated arsenic-bearing gold concentrate slurry and reacting them together in an autoclave at an elevated pressure and temperature in a pressure oxidation step. In one or more examples, the process may further comprise processing the oxidized concentrate slurry in an arsenic re-dissolution step to dissolve unstable solid arsenic compounds, and applying a first solid/liquid separation and wash step to form a first washed slurry/solid and first acid-containing solutions. The process may further comprise reacting the first washed slurry/solid with sulfur dioxide in a reductive leach step, and applying a second solid/liquid separation and wash step to form a second washed slurry/solid and second acid-containing solutions. The second washed slurry/solid may be a low arsenic-bearing gold concentrate.

公开(公告)号：US10077487B2

公开(公告)日：2018-09-18

申请号：US14287910

申请日：2014-05-27

申请人： Barrick Gold Corporation

发明人： Yeonuk Choi ,  Ahmad Ghahremaninezhad Gharelar ,  Noelene Ahern

IPC分类号： C22B30/04 ,  C01G49/00 ,  C22B30/02 ,  C22B3/44

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.

公开(公告)号：US08790516B2

公开(公告)日：2014-07-29

申请号：US13202762

申请日：2010-02-19

申请人： Mikko Ruonala ,  Jaakko Leppinen ,  Ville Miettinen

发明人： Mikko Ruonala ,  Jaakko Leppinen ,  Ville Miettinen

IPC分类号： B01D21/00 ,  C02F1/52 ,  B03D3/00 ,  C02F1/72 ,  C01G1/00 ,  C01G49/00 ,  C01G51/00 ,  C01G53/00 ,  C22B1/00 ,  C22B23/00 ,  C22B7/00 ,  C22B30/04 ,  C22B3/44 ,  C02F1/68 ,  C02F1/00 ,  B01D37/00 ,  C01G28/00 ,  C01G29/00 ,  C01G30/00 ,  C02F1/74 ,  C02F101/10 ,  C02F101/20

CPC分类号： C22B7/006 ,  C01G49/0018 ,  C02F1/001 ,  C02F1/72 ,  C02F1/722 ,  C02F1/74 ,  C02F2101/103 ,  C02F2101/203 ,  C22B3/44 ,  C22B30/04 ,  Y02P10/234

摘要： The invention relates to a method for removing arsenic as scorodite from solutions that contain iron and arsenic. In accordance with the method, arsenic is first precipitated as ferric arsenate and subsequently processed hydrothermally into crystalline scorodite.

摘要翻译： 本发明涉及一种从含有铁和砷的溶液中除去臭氧石灰的方法。 根据该方法，首先将砷沉淀为砷酸亚铁，随后将其水热处理成结晶的臭葱石。

公开(公告)号：US20130315804A1

公开(公告)日：2013-11-28

申请号：US13891375

申请日：2013-05-10

申请人： Aileen Halverson ,  Aaron Reichl

发明人： Aileen Halverson ,  Aaron Reichl

IPC分类号： C22B7/02 ,  C22B30/04 ,  C22B34/32 ,  C22B34/22

CPC分类号： C22B7/02 ,  A62D3/33 ,  A62D2101/08 ,  A62D2101/24 ,  A62D2101/43 ,  C22B30/04 ,  C22B34/22 ,  C22B34/32

摘要： The present invention is directed to a process of treating fly ash and/or fly ash leachate to immobilize heavy metals contained in such fly ash and/or fly ash leachate, which process comprises treating such fly ash and/or fly ash leachate with a soluble ferrous compound under alkaline conditions. This process may be conducted in the absence of any pH modification, mixing (in the sense of a physical blending with a solid material), drying or heating steps, making it practical for treatment of alkaline fly ash (and other coal combustion by-products) which is currently stored in landfills or wet ash lagoons, particularly fly ash which has been recovered from flue gas streams treated with highly alkaline materials such as trona, bicarbonate or limestone and the like.

摘要翻译： 本发明涉及一种处理飞灰和/或飞灰渗滤液以固定包含在这种飞灰和/或飞灰渗滤液中的重金属的方法，该方法包括用可溶性物质处理这种飞灰和/或飞灰渗滤液 亚铁化合物在碱性条件下。 该方法可以在没有任何pH变化，混合（在固体材料的物理共混的意义上），干燥或加热步骤的情况下进行，使其可用于处理碱性飞灰（和其他燃煤副产物 ），其目前存储在垃圾填埋场或湿灰烬泻湖中，特别是已经用高碱性物质如天然碱，碳酸氢盐或石灰石等处理的烟气流中回收的飞灰。

公开(公告)号：US07416712B2

公开(公告)日：2008-08-26

申请号：US10489253

申请日：2002-09-14

申请人： Alexander Beckmann

发明人： Alexander Beckmann

IPC分类号： C22B3/04 ,  C22B30/04 ,  C22B23/00

CPC分类号： C22B3/18 ,  C22B1/06 ,  C22B23/0407 ,  Y02P10/234

摘要： The invention relates to a method for obtaining metals from a cobalt and/or nickel arsenic sulfide ore or ore concentrate and/or a cobalt and/or nickel sulfide ore or ore concentrate, according to which the cobalt and/or nickel arsenic sulfide ore or ore concentrate and/or the cobalt and/or nickel sulfide ore or ore concentrate is reacted with sulfur or sulfur arsenic compounds to a reaction product, and dissolving and removing soluble metals and rare-earth metals.

摘要翻译： 本发明涉及从钴和/或镍的硫化砷矿石或矿石精矿和/或钴和/或硫化镍矿石或矿石精矿中获得金属的方法，根据该方法，钴和/或镍的硫化砷矿石或 矿石浓缩物和/或钴和/或硫化镍矿石或矿石浓缩物与硫或硫砷化合物反应成反应产物，并溶解和除去可溶性金属和稀土金属。

公开(公告)号：US5762891A

公开(公告)日：1998-06-09

申请号：US607882

申请日：1996-02-27

申请人： Jerome P. Downey ,  Harry Mudgett

发明人： Jerome P. Downey ,  Harry Mudgett

IPC分类号： C01G49/00 ,  C22B1/06 ,  C22B30/04 ,  C01G3/00 ,  C01G28/00

CPC分类号： C01G49/00 ,  C22B1/06 ,  C22B30/04 ,  Y02P10/234

摘要： The present invention is a method to remove arsenic from arsenic-containing materials, such as an ore or concentrate, by roasting the arsenic-containing material to convert arsenic sulfides into arsenic oxides. The arsenic oxides are contained in the roasted arsenic-containing material. The roasted arsenic-containing material is contacted with a lixiviant to solubilize the arsenic in the oxide in a pregnant leach solution. Ferric arsenate, an environmentally stable compound, is formed in the lixiviant. The ferric arsenate can be removed to provide a treated solution complying with environmental regulations. The method provides a simple and effective technique for removing arsenic from arsenic-containing materials.

摘要翻译： 本发明是通过焙烧含砷材料将砷化物转化成砷的方法从含砷材料如矿石或浓缩物中除去砷的方法。 含砷化学物质中含有氧化砷。 将含砷砷的材料与浸渍剂接触以将砷溶解在怀孕浸提溶液中的氧化物中。 在浸渍剂中形成了一种环境稳定的化合物砷酸铁。 可以除去砷酸铁以提供符合环境规定的处理溶液。 该方法提供了一种从含砷材料中去除砷的简单有效的技术。

公开(公告)号：US5487819A

公开(公告)日：1996-01-30

申请号：US360695

申请日：1994-12-23

申请人： Peter K. Everett

发明人： Peter K. Everett

IPC分类号： C22B3/04 ,  B01D71/02 ,  B01F7/16 ,  B01F13/02 ,  C01G3/00 ,  C01G9/00 ,  C01G21/00 ,  C01G28/00 ,  C01G29/00 ,  C01G30/00 ,  C01G49/00 ,  C01G53/00 ,  C22B20060101 ,  C22B3/00 ,  C22B3/02 ,  C22B3/06 ,  C22B3/10 ,  C22B3/44 ,  C22B11/00 ,  C22B13/00 ,  C22B15/00 ,  C22B19/00 ,  C22B23/00 ,  C22B30/02 ,  C22B30/04 ,  C22B30/06 ,  C22B61/00 ,  C25C1/00 ,  C25C1/08 ,  C25C1/12 ,  C25C1/16 ,  C25C1/18 ,  C25C1/20 ,  C25C7/00 ,  C25C7/02 ,  C25C7/04

CPC分类号： C25C1/12 ,  C22B3/06 ,  C25C1/08 ,  C25C1/16 ,  C25C1/18 ,  C25C1/20 ,  Y02P10/234

摘要： A process for producing one or more metals from a mineral feedstock (12) is defined. The mineral is fed to a leaching apparatus (10) wherein it is contacted with electrolyte (14). The leaching apparatus has zones of decreasing oxidation potential (17, 18, 19, 20) respectively. A stream of electrolyte (14A) is removed from zone (20) and is treated to remove impurities and unwanted metals in treatment unit (25A), prior to metal recovery by electrolysis. The electrolyte after electrolysis is then returned to the leaching unit (10). A second electrolyte stream (14B) may be removed from zone (19) for recovery of additional metals. The electrolyte (14B) is treated to remove impurities and any unwanted metals in treatment unit (25B), prior to metal recovery by electrolysis. The electrolyte after electrolysis is returned to leaching unit (10). The process enables the leaching of difficult to leach minerals, including gold, and can produce one or more metals of high purity.

摘要翻译： PCT No.PCT / AU93 / 00311 Sec。 371日期1994年12月23日第 102（e）日期1994年12月23日PCT提交1993年6月25日PCT公布。 公开号WO94 / 00606 1994年1月6日授权。从矿物原料（12）制备一种或多种金属的方法。 将矿物质进料到浸出装置（10）中，其中其与电解质（14）接触。 浸出装置具有分别降低氧化电位的区域（17,18,19,20）。 在通过电解进行金属回收之前，将电解液流（14A）从区域（20）中除去并被处理以除去处理单元（25A）中的杂质和不需要的金属。 电解后的电解液然后返回到浸出单元（10）。 可以从区域（19）移除第二电解质流（14B）以用于回收另外的金属。 在电解金属回收之前，处理电解质（14B）以除去处理单元（25B）中的杂质和任何不需要的金属。 电解后的电解液返回浸出装置（10）。 该过程使得能够浸出难以浸出的矿物质，包括金，并且可以产生一种或多种高纯度的金属。

公开(公告)号：US5482534A

公开(公告)日：1996-01-09

申请号：US211916

申请日：1994-04-20

申请人： Rodney L. Leonard ,  John G. Whellock

发明人： Rodney L. Leonard ,  John G. Whellock

IPC分类号： C22B11/00 ,  C22B3/06 ,  C22B3/44 ,  C22B15/00 ,  C22B19/00 ,  C22B19/30 ,  C22B23/00 ,  C22B30/04

CPC分类号： C22B15/0073 ,  C22B11/04 ,  C22B19/22 ,  C22B19/30 ,  C22B23/0438 ,  C22B3/065 ,  C22B30/04 ,  Y02P10/234 ,  Y02P10/236

摘要： A process suitable for the extraction or recovery of metal values from arsenic containing feeds and including the steps of: a) treating the feed with a nitric acid-containing leachant solution in order to dissolve the desired metals; b) adding a source of iron (III) to the leachant solution whereby to oxidise arsenic (III) in solution to arsenic (V); c) adding a neutralising agent to the leachant solution whereby to precipitate arsenic as arsenic (V); d) separating the arsenic (V) precipitate from the leachant solution; and e) recording metal values from the leachant solution.

摘要翻译： 一种适用于从含砷饲料提取或回收金属值的方法，包括以下步骤：a）用含硝酸的浸出剂溶液处理饲料以溶解所需的金属; b）向浸出液中加入铁（III）源，从而将溶液中的砷（III）氧化成砷（V）; c）向浸出液中加入中和剂，由此将砷沉淀为砷（V）; d）从浸出液中分离出砷（V）沉淀物; e）从浸出液中记录金属值。

公开(公告)号：US4751063A

公开(公告)日：1988-06-14

申请号：US016268

申请日：1987-02-19

申请人： Victor Kalcevic ,  John F. McGahan

发明人： Victor Kalcevic ,  John F. McGahan

IPC分类号： A62D3/00 ,  A62D3/33 ,  A62D3/34 ,  A62D3/35 ,  A62D101/24 ,  A62D101/40 ,  A62D101/43 ,  A62D101/49 ,  B01J27/32 ,  C01G30/00 ,  C22B3/16 ,  C22B7/00 ,  C22B30/02 ,  C22B30/04 ,  B01J23/92 ,  B01J38/48

CPC分类号： A62D3/35 ,  B01J27/32 ,  C01G30/00 ,  C22B3/1658 ,  C22B30/02 ,  C22B30/04 ,  C22B7/009 ,  A62D2101/40 ,  A62D2101/43 ,  A62D2101/49 ,  Y02P10/214 ,  Y02P10/234 ,  Y02P20/584

摘要： A process in which spent catalyst from chlorofluorocarbon production is treated to detoxify the catalyst for safe disposal or reprocessing. The spent catalyst includes antimony and arsenic halides, halogenated organic liquids, and has an upper liquid portion and a lower sludge or semisolid portion. The processing of both the liquid and sludge portions includes hydrolyzing the catalyst in an aqueous solution of ferric chloride resulting in formation of a ferric ion/fluoride ion complex in addition to insoluble compounds, and neutralizing the reaction mass following hydrolysis with an aqueous suspension of calcium hydroxide. The volatile organics are stripped from the neutralized reaction mass and collected for reuse or disposal. The reaction mass is dried to yield the insoluble compounds in a solid form for subsequent reprocessing or disposal. The sludge portion is preferably treated separately following treatment of the liquid portion by dissolving the sludge in situ before hydrolyzing using an organic liquid solvent comprising a mixture of n-butanol and previously collected volatile organic liquids.

摘要翻译： 处理来自氯氟烃生产的废催化剂以对催化剂进行解毒以安全处理或再处理的方法。 废催化剂包括锑和砷卤化物，卤化有机液体，并且具有上部液体部分和下部污泥或半固体部分。 液体和污泥部分的处理包括在氯化铁水溶液中水解催化剂，导致除了不溶性化合物之外还形成铁离子/氟化物离子络合物，并且用钙水溶液悬浮液中和反应物质 氢氧化物。 将挥发性有机物从中和的反应物质中汽提出来并收集再利用或处置。 将反应物质干燥，得到固体形式的不溶性化合物用于随后的后处理或处理。 在使用包含正丁醇和预先收集的挥发性有机液体的混合物的有机液体溶剂进行水解之前，优选在处理液体部分之后单独处理污泥部分。

公开(公告)号：US4737350A

公开(公告)日：1988-04-12

申请号：US44899

申请日：1987-03-26

申请人： Agostino Baradel ,  Renato Guerriero

发明人： Agostino Baradel ,  Renato Guerriero

IPC分类号： C22B30/04 ,  C01G28/00 ,  C22B3/00 ,  C22B3/26 ,  C01B27/00

CPC分类号： C01G28/001 ,  C22B3/0009 ,  Y02P10/234 ,  Y10S204/13

摘要： A process for separating arsenic from acid aqueous solutions containing arsenic and other metal ions. The process involves bringing the acid aqueous solution into contact with a water-immiscible organic diluent consisting of hydrocarbons, alcohols or their mixtures, in which there is dissolved as solvent at least one polyol. The solvent thereby extracts the arsenic, which is then re-extracted with a counter-solvent.

摘要翻译： PCT No.PCT / EP86 / 00437 371日期1987年3月26日 102（e）1987年3月26日PCT申请1986年7月23日PCT公布。 出版物WO87 / 00867 日期：1987年2月12日。一种从含有砷和其他金属离子的酸性水溶液中分离砷的方法。 该方法包括使酸水溶液与由烃，醇或其混合物组成的与水不混溶的有机稀释液接触，其中作为溶剂溶解至少一种多元醇。 溶剂因此提取砷，然后用反溶剂再次萃取。