鲕状赤铁矿选矿与脱磷技术动态  

Current Situation of Mineral Processing and Phosphorus Removal of Refractory Oolitic Hematite

作　　者：罗立群[1,2] 吴远庆[1,2] 

机构地区：[1]武汉理工大学资源与环境工程学院,湖北武汉430070 [2]武汉理工大学矿物资源加工与环境湖北省重点实验室,湖北武汉430070

出　　处：《昆明理工大学学报（自然科学版）》2015年第6期23-30,共8页Journal of Kunming University of Science and Technology(Natural Science)

基　　金：国家"十二五"科技支撑计划项目(2013BAB03B03)

摘　　要：鲕状赤铁矿铁品位高、储量大,因其特殊的结构且含磷较高,成为国内外选矿技术的难点之一.对鲕状赤铁矿的选矿工艺从直接入选、磁化焙烧-磁选、深度还原3类进行了系统归纳和总结,并介绍了3类工艺的分选机理.指出直接入选能耗低,污染少,但对磨矿细度有要求,矿石泥化严重;磁化焙烧-磁选是目前处理鲕状赤铁矿行之有效的办法,精矿指标较好,但磷含量较高;深度还原法处理鲕状赤铁矿,能够进一步提高精矿指标,但能耗高、工艺复杂.此外,从物理法、化学法和微生物法3个方面评述了鲕状赤铁矿有害杂质磷的脱除,建议结合技术经济来考察和分析其脱磷效果.Oolitic hematite is high in iron content and abundant in reserve,but for its particular structure and higher phosphorous content,its separation has been one of most difficult problems in the mineral processing field worldwide. Overviews on oolitic hematite separation are summarized as the following three classes： direct separation,roasting- magnetic separation and deep reduction in this paper,and the mechanism of each separation is introduced at the same time. Compared with others,the direct separation has the advantage of lower energy consumption and less pollution to environment. However fineness in the slurry is more serious and particle sizes of grinding products ought to be suitable. Roasting-agnetic separation is one of the most effective ways to process the oolitic hematite and the grade and the recovery of iron in concentrate is good but with higher content of phosphorus in the concentrate. The deep reduction method ensures better grade,recovery and metallization ratio,but with higher energy consumption and more complicated processing. The physical,chemical and microbial aspects of phosphorus removal in oolitic hematite separation are then reviewed. The effect of dephosphorization should be studied and analyzed from the view of technological economics.

关 键 词：鲕状赤铁矿 磁化焙烧-磁选 深度还原 脱磷 

分 类 号：TD924[矿业工程—选矿] TD925