1983年7月8～10日,中国有色金属工业总公司受国家科委委托在金川召开了“从二次铜镍合金提取贵金属新工艺”的技术鉴定会。14个有关单位的代表42人参加了会议。被鉴定的新工艺系贵金属研究所、金川有色金属公司和北京有色冶金设计研究总院从1973年以来长期协作研究成功的。新工艺经历了实验室实验、小型扩大试验、扩大试 July 8, 1983 July 10, China Nonferrous Metals Industry Corporation commissioned by the State Science and Technology Commission held in Jinchuan, “from the second copper and nickel alloy extraction of precious metals new technology,” the technical appraisal. Forty-two representatives of 14 relevant units attended the meeting. The new technology department of the Institute of Precious Metals, Jinchuan Nonferrous Metals Company and Beijing Nonferrous Metallurgical Design and Research Institute have been successfully cooperating for a long time since 1973. The new technology has gone through laboratory experiments, small-scale expansion of the trial to expand the trial