Production of zinc oxide from acid soluble ore using precipitation method
    9.
    发明授权
    Production of zinc oxide from acid soluble ore using precipitation method 失效
    使用沉淀法从酸溶性矿石生产氧化锌

    公开(公告)号:US06726889B2

    公开(公告)日:2004-04-27

    申请号:US10199512

    申请日:2002-07-22

    IPC分类号: C22B1900

    摘要: The present invention relates to an apparatus and a process for producing zinc oxide from an acid soluble zinc-bearing material. The process according to the present invention comprises the steps of leaching the zinc oxide material with sulphuric acid; precipitating iron and silica from the leach solution using calcium oxide; removing copper, cadmium and cobalt from the leach solution by cementation with zinc dust; precipitating zinc oxide from the leach solution using calcium oxide; and upgrading zinc content in zinc oxide precipitates by separating zinc oxide from gypsum using a flotation or granulometric sizing technique.

    摘要翻译: 本发明涉及一种由酸溶性含锌材料制备氧化锌的设备和方法。 根据本发明的方法包括用硫酸浸出氧化锌材料的步骤; 使用氧化钙从浸出溶液中沉淀铁和二氧化硅; 通过与锌粉粘结从浸出溶液中去除铜,镉和钴; 使用氧化钙从浸出溶液中沉淀氧化锌; 并通过使用浮选或粒度测定技术从石膏中分离氧化锌,提高氧化锌沉淀中的锌含量。

    Method for recovering precious metals and copper from leach solutions
    10.
    发明授权
    Method for recovering precious metals and copper from leach solutions 有权
    从浸出液中回收贵金属和铜的方法

    公开(公告)号:US09051625B2

    公开(公告)日:2015-06-09

    申请号:US13524907

    申请日:2012-06-15

    IPC分类号: C22B11/00 C22B3/42 C22B3/00

    CPC分类号: C22B11/04 C22B3/42 Y02P10/234

    摘要: The present disclosure is directed to a process for recovering a precious metal from a pregnant leach solution using a resin extractant. The precious metal is eluted from the loaded resin using an eluant comprising trithionate. The barren resin is contacted with a sulfide, bisulfide, and/or polysulfide to convert sorbed trithionate to thiosulfate. The desorbed thiosulfate is contacted with an oxidant and converted to trithionate for eluant recycle.

    摘要翻译: 本公开涉及使用树脂萃取剂从怀孕浸出溶液中回收贵金属的方法。 使用包含三硫酸盐的洗脱剂从负载的树脂中洗脱贵金属。 贫硫树脂与硫化物,二硫化物和/或多硫化物接触以将吸附的三硫酸盐转化为硫代硫酸盐。 将脱硫的硫代硫酸盐与氧化剂接触,并转化成三硫代乙酸盐用于洗脱剂再循环。