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1975年6月,在学习无产阶级专政理论热潮中,在广东红岭钨矿、有色金属研究院广东分院和鞍山黑色金属矿山设计院的共同努力下,采用φ300重介质涡流分选器对梅山铁矿一期富矿进行了工业性试验,旨在从矿石中脱除混入的废石、恢复其地质品位和矿石自熔性,为下一步脱除硫、磷杂质创造条件。工业性试验获得了较好的技术指标:原矿铁品位为47.70～46.72%、精矿铁品位为51.20～49.98%、尾矿铁品位8.32～6.17%和金属回收率为98.57～99.02%。
In June 1975, with the upsurge of studying the theory of the dictatorship of the proletariat, with the concerted efforts of Guangdong Hongling Tungsten Mine, Guangdong Nonferrous Metal Research Institute and Anshan Ferrous Metal Mining Design Institute, the φ300 heavy medium eddy current sorter was used to measure the Meishan Iron In the first phase of the mine, an industrial test was carried out to remove the mixed waste rock from the ore, recover its geological grade and ore self-melting, and create the conditions for the next step of removing sulfur and phosphorus impurities. Industrial tests obtained good technical indicators: the grade of ore is 47.70-46.72%, the grade of concentrate is 51.20-49.98%, the grade of tailings is 8.32- 6.17% and the rate of metal recovery is 98.57-99.02%.