| 发明名称 | Method and system for gold recovery | ||
| 摘要 | A method for recovering precious metal from an acidic pregnant solution resulting from halogen or hypohalite leaching of an ore, comprising lowering the ORP of the pregnant leachate with a reducing agent in the presence of slurried non-carboneous particles. The precious metal deposits on the surfaces of the particles and a barren solution comprising substantially all the halogen values of the pregnant solution in the form of sodium chloride, sodium bromide or hypohalites is recovered. | ||
| 申请公布号 | US9206491(B2) | 申请公布日期 | 2015.12.08 |
| 申请号 | US201313957002 | 申请日期 | 2013.08.01 |
| 申请人 | Dundee, Technologies Durables Inc. | 发明人 | Lalancette Jean-Marc;Dubreuil Bertrand;Lemieux David |
| 分类号 | C22B3/44;C22B3/22;C22B3/00;C22B3/04 | 主分类号 | C22B3/44 |
| 代理机构 | Schwegman Lundberg & Woessner, P.A. | 代理人 | Schwegman Lundberg & Woessner, P.A. |
| 主权项 | 1. A method for recovering precious metals from a precious metals-bearing ore, comprising: leaching the ore using a hypochlorite/hypobromite solution at atmospheric pressure, thereby yielding a precious metals-bearing halogen-based pregnant solution; and lowering an oxidation-reduction potential of the pregnant solution with a reducing agent while contacting the pregnant solution with slurried non-carboneous particles having a specific surface in a range between about 0.01 and about 10 m2/g, at ambient temperature and pressure, and at a pH in a range between about 0.1 and about 2.5, yielding a barren solution comprising substantially all the halogen values of the pregnant solution. | ||
| 地址 | CA | ||