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我国选矿技术发展得很晚。虽然宋以前土法(淘洗)选矿就用以生产铁、金等矿物,但直到辛亥革命之后民国成立(1911年),云南省政府才筹办了官商合办的云南锡务公司,在马拉格开矿,在个旧建选矿厂,用磨矿、分级、摇床流程进行机械选矿。这是我国最早的机械选矿厂。到1940年,云南锡务公司组成,经理为缪云台,副经理为吕冤南,总工程师为倪桐材。
Our dressing technology developed very late. Although the Song Dynasty before the soil (panning) beneficiation used to produce iron, gold and other minerals, but until the founding of the Republic of China after the Revolution of 1911 (1911), Yunnan provincial government organized a joint venture of Yunnan Tin companies, Grid mining, built in a Gejiu mill, grinding, grading, shaker flow of mechanical processing. This is our country’s first mechanical beneficiation plant. By 1940, Yunnan tin company, the manager for the Miaoyuntai, deputy manager Lv innocent, the chief engineer Ni Tong material.