1965年10月7—9日在美国阿利桑那州菲尼克斯(Phoenix)的赖马达因召开了美国采矿工程师协会年会。会上宣谈了以下几篇有关选矿的论文:1)永磁磁选机;2)破碎与磨矿之间的平衡;3)应用离子交换法从酸溶液中回收铜;4)用离析法从毛里塔尼亚的阿克丘特氧化矿石中回 Held in Houston, Arizona, USA on October 7-9, 1965 at the annual meeting of the American Institute of Mining Engineers. The following articles on beneficiation were announced at the conference: 1) permanent magnetic separator; 2) balance between crushing and grinding; 3) copper recovery from acid solution by ion exchange; 4) Back from the Aktobe oxidized ores in Mauritania