摘要：以山东省某赤泥高阶磁选过程中的底流(铁品位31. 07%)、粗精(铁品位42. 73%)为原料,采用流态化磁化焙烧-弱磁选工艺进行实验研究。结果表明:该赤泥过细流化困难,但经过高阶磁选工艺"抛细留粗"处理的底流、粗精均可以实现连续、稳定的流态化。底流在采用流态化磁化焙烧-弱磁选工艺后,铁品位可以提高至62. 04%,铁回收率可以提高至68. 35%;粗精在采用流态化磁化焙烧-弱磁选工艺后,铁品位可以提高至63. 88%,铁回收率可以提高至85. 47%。

Abstract: Magnetic roasting via a fluidized bed was carried out for the high intensity magnetic pro-concentration products of the red mud from Shandong．The results show that the red mud is hard to flow in fluidized bed while the high intensity magnetic pro-concentration products have fine fluidization．The iron grade 31．07% sample magnetic roasting followed by magnetic separating can upgrade the concentrate to the iron content of 62．04% with a Fe recovery rate of 68．35% ．The iron grade 42．73% sample magnetic roasting followed by magnetic separating can upgrade the concentrate to the iron content of 63．88% with a Fe recovery rate of 85．47% ．

Keywords: fluidization; magnetic roasting; high intensity magnetic; red mud