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本文阐述强磁－脉动高梯度磁选、阶段磨选工艺选别姑山红铁矿的试验研究及生产实践。该工艺结构简单，适应性强，是选别难选赤铁矿较为成功的实例。
This article describes the strong magnetic - pulsating high-gradient magnetic separation, stage grinding process selected Gushan red iron pilot study and production practice. The process has the advantages of simple structure and strong adaptability, and is a more successful example of selecting difficult hematite.