美国密执安工业大学矿物研究所近年来研究了细磨铁矿石不脱泥浮选的工艺。用一种金属硅酸盐凝胶做调整剂。在未脱泥的铁矿石阴离子浮选时,使脉石矿物得到有效分散。1977年用此工艺对蒂尔顿铁矿石做过实验室试验。取得了精矿铁品位63.5％,回收率87％的指标。1979年公布的美国专利介绍了此工艺的主要内容和实验室试验结果。并证明了此工艺 In recent years, the Institute of Mineralogy of the Michigan Institute of Technology has studied the process of finely ground iron ore without flotation. A metal silicate gel is used as a modifier. In the non-deslimed iron ore anion flotation, the gangue minerals are effectively dispersed. 1977 Tilten Iron Ore made laboratory experiments with this process. Has made the concentrate iron grade 63.5%, the recovery rate of 87% of the indicators. The U.S. patent published in 1979 introduced the main contents of the process and laboratory test results. And proved this craft