关键词: 磁铁矿, 高压辊磨, 粗粒湿式磁选, 阶段磨选

Abstract: Beneficiation tests on Zhongshan iron ore was carried out by the process of high pressure roller mill-wet magnetic separation for coarse ores-stage grinding and stage low intensity magnetic separation. The results showed that, tailings with yield rate of 50.05% and iron grade of 8.33% will discarded after wet magnetic separation for high pressure roller mill products, iron grade of feed for grinding increased from 23.67% to 39.18%, providing technical support for reduce the production cost. Iron concentrate with iron grade of 65.13%, iron recovery of 61.48% and magnetic iron recovery of 98.65% could achieved by stage grinding-stage low magnetic separation for iron concentrate of pre-concentration.

Key words: Magnetite, High pressure roller mill, Wet magnetic separation for coarse ores, Stage grinding and stage concentration