公开(公告)号：US5336474A

公开(公告)日：1994-08-09

申请号：US956317

申请日：1992-10-06

申请人： Manfred Diehl ,  Karl-Heinz Koenig ,  Eckhart Krone ,  Juergen Loroesch ,  Norbert Steiner ,  Jochen Ullmann ,  Annette Ziegler

发明人： Manfred Diehl ,  Karl-Heinz Koenig ,  Eckhart Krone ,  Juergen Loroesch ,  Norbert Steiner ,  Jochen Ullmann ,  Annette Ziegler

IPC分类号： C22B11/08 ,  B01D11/00

CPC分类号： C22B11/08

摘要： A process is disclosed for the leaching of gold and silver from ores and ore concentrates through intimate contact of the ore or ore concentrate with an aqueous leach solution containing cyanide. The leach solution has a pH of 8 to 13. The leaching process takes place in the presence of an oxygen-releasing peroxo compound. The separation of the formed cyano complexes of gold and silver takes place in a known manner. During leaching, at least one peroxoborate compound is present, in an effective quantity, as the peroxo compound. The peroxoborate is preferably a sodium or calcium peroxoborate. Compared to previously known leaching techniques in the presence of hydrogen peroxide or calcium peroxide, the leaching process according to the present invention provides a higher and/or faster precious metal yield and/or minimizes the consumption of cyanide and/or oxidizing agent.

摘要翻译： 公开了通过矿石或矿石浓缩物与含氰化物的含水浸出溶液的紧密接触从矿石和精矿中浸出金和银的方法。 浸出溶液的pH值为8-13。浸出过程发生在释放氧的过氧化合物的存在下。 形成的金和银的氰基络合物的分离以已知的方式进行。 在浸出过程中，至少有一种过氧化硼化合物作为过氧化合物以有效的量存在。 过氧硼酸盐优选为过氧硼酸钠或钙。 与先前已知的在过氧化氢或过氧化钙存在下的浸提技术相比，根据本发明的浸出方法提供了更高和/或更快的贵金属产率和/或使氰化物和/或氧化剂的消耗最小化。

公开(公告)号：US5250272A

公开(公告)日：1993-10-05

申请号：US899588

申请日：1992-06-18

申请人： Helmut Knorre ,  Juergen Loroesch ,  Steven Gos ,  Mathias Stoll ,  Annette Ziegler

发明人： Helmut Knorre ,  Juergen Loroesch ,  Steven Gos ,  Mathias Stoll ,  Annette Ziegler

IPC分类号： C22B11/08 ,  C01G5/00 ,  C01G7/00

CPC分类号： C22B11/08

摘要： A process for leaching gold and silver from ores and ore concentrates is disclosed using a cyanide leaching solution and hydrogen peroxide and maintaining an oxygen concentration of 2 to 20 Mg of O.sub.2 /liter. In the invention, leaching takes place in the presence of decomposition catalysts and preferably the formed cyano-complexes are separated during leaching from the leach solution. Decomposition catalysts are manganese compounds, present as 0.01 to 1 mg computed as Mn/liter of barren solution, or 1 to 50 mg computed as Mn per kg of ore slurry, or they are inorganic or organic polymers or carbon. Activated charcoal is preferred and simultaneously adsorbing cyano-complexes of precious metals. The process offers lowered consumption of H.sub.2 O.sub.2 and possibly cyanide and maximum gold yield in a shortened leaching time.

摘要翻译： 公开了使用氰化物浸出溶液和过氧化氢并保持氧浓度为2至20Mg 2 /升的从矿石和精矿中浸出金和银的方法。 在本发明中，在分解催化剂的存在下进行浸出，优选在从浸出溶液浸出过程中形成的氰基络合物被分离。 分解催化剂是锰化合物，其存在0.01至1mg，以锰/升贫瘠溶液计算，或1至50mg以每kg矿浆计的Mn计算，或者它们是无机或有机聚合物或碳。 活性炭是优选的，同时吸附贵金属的氰基络合物。 该过程在缩短的浸出时间内提供了较低的H2O2消耗量和可能的氰化物和最大的黄金产量。

公开(公告)号：US5275791A

公开(公告)日：1994-01-04

申请号：US899060

申请日：1992-06-16

申请人： Helmut Knorre ,  Andrew Griffiths ,  Juergen Loroesch ,  Joachim Fischer

发明人： Helmut Knorre ,  Andrew Griffiths ,  Juergen Loroesch ,  Joachim Fischer

IPC分类号： C22B11/08 ,  C01G5/00 ,  C01G7/00

CPC分类号： C22B11/08

摘要： A process is described for leaching gold and/or silver from ores or ore concentrates using an aqueous alkaline cyanide solution with addition of hydrogen peroxide. The addition of the aqueous H.sub.2 O.sub.2 solution is regulated and controlled through the concentration of the oxygen dissolved in the leaching solution, the leaching solution containing from 2 to 20 mg O.sub.2 and preferably from 7 to 13 mg O.sub.2 per liter. 0.5 to 5% by weight H.sub.2 O.sub.2 solutions are preferably added. The process is applicable both to leaching by agitation and to heap leaching, the addition of H.sub.2 O.sub.2 being regulated and controlled through measurement of the O.sub.2 concentration in the leaching solution and can also involve measurement in a measuring stream. Despite low consumptions of H.sub.2 O.sub.2 and NaCN, the gold yield is even increased in some cases and the leaching time shortened.

摘要翻译： 描述了一种使用加入过氧化氢的碱性氰化物水溶液从矿石或精矿中浸出金和/或银的方法。 通过溶解在浸出溶液中的氧浓度调节和控制H 2 O 2水溶液的添加，浸出溶液含有2至20mg O 2，优选7至13mg O 2 /升。 优选加入0.5-5重量％的H 2 O 2溶液。 该方法适用于通过搅拌和堆浸浸出，通过测量浸出溶液中的O 2浓度来调节和控制H 2 O 2的添加，并且还可以涉及测量流中的测量。 尽管H2O2和NaCN的消耗量很低，但在某些情况下，金的产量甚至增加，浸出时间缩短。

公开(公告)号：US5914075A

公开(公告)日：1999-06-22

申请号：US777397

申请日：1996-12-27

申请人： Herbert Riemenschneider ,  Christian Alt ,  Martina Claus ,  Juergen Loroesch ,  Josef Leutner ,  Heinz Moench ,  Ruediger Schuette ,  Stefan Schulze

发明人： Herbert Riemenschneider ,  Christian Alt ,  Martina Claus ,  Juergen Loroesch ,  Josef Leutner ,  Heinz Moench ,  Ruediger Schuette ,  Stefan Schulze

IPC分类号： C01C3/10 ,  B29B9/00

CPC分类号： C01C3/10 ,  C01P2004/32 ,  C01P2004/50 ,  C01P2004/61 ,  C01P2006/10 ,  C01P2006/21 ,  C01P2006/80

摘要： New alkali metal cyanide granulates based on sodium cyanide or potassium cyanide and a method for their preparation are disclosed. Commercially available alkali metal cyanide granulates consist of irregular particles; disadvantages are in particular the tendencies to form dust and to cake. The disclosed alkali metal cyanide granulates demonstrate a reduced tendency to cake and virtually no abrasion. The granulates are characterized by essentially spherical particles with particle diameters in the range 0.1 to 20 mm, a bulk density of more than 600 g/dm.sup.3, an abrasion of less than 1%, and a caking index of at most 4. The granulates can be prepared by fluidized bed spray granulation involving spraying an aqueous solution containing alkali metal cyanide onto alkali metal cyanide nuclei in a fluidized bed and evaporating the water.

摘要翻译： 公开了基于氰化钠或氰化钾的新的碱金属氰化物颗粒及其制备方法。 市售的碱金属氰化物颗粒由不规则颗粒组成; 缺点尤其是形成灰尘和蛋糕的倾向。 所公开的碱金属氰化物颗粒显示出降低的滤饼倾向并且几乎没有磨损。 颗粒的特征在于粒径在0.1至20mm，堆积密度大于600g / dm 3，磨损小于1％，结块指数至多为4的基本上为球形的颗粒。颗粒可以 通过流化床喷雾造粒制备，包括在流化床中将含有碱金属氰化物的水溶液喷涂到碱金属氰化物核上并蒸发水。