强磁选和流态化磁化焙烧联合工艺回收赤泥中的铁  

Iron recovering from red mud by combined process of high intensity magnetic pro-concentration and magnetizing roasting via fluidized bed

作　　者：邵国强[1] 谢朝晖[1] 闫冬 朱庆山[1] SHAO Guoqiang;XIE Zhaohui;YAN Dong;ZHU Qingshan(State Key Laboratory of Multiphase Complex Systems, Chinese Academy of Sciences, Beijing 100190, China)

机构地区：[1]中国科学院过程工程研究所,多相复杂系统国家重点实验室,北京100190

出　　处：《中国粉体技术》2019年第6期1-6,共6页China Powder Science and Technology

基　　金：国家自然科学基金重点项目，编号:21736010

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%。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%.

关 键 词：流化床 磁化焙烧 高阶磁选 赤泥 

分 类 号：TD792[矿业工程—矿井通风与安全]