作　　者： (常军）; (邵延海）; (李硕）; (蒋丰祥）; (张校熔）;

机构地区： 昆明理工大学国土资源工程学院,云南昆明650093

出　　处： 《轻金属》 2017年第8期4-10,共7页

摘　　要： 赤泥是氧化铝生产过程中产生的一种碱性固体废弃物。本论文研究了直接还原焙烧-磁选工艺回收赤泥中的铁。在对赤泥原矿进行一系列测试分析的基础上,分别研究了反应时间、反应温度、还原剂的种类及用量,添加剂的种类及用量与磁选场强对试验结果的影响,并对添加剂的作用机理进行了一定的分析。研究发现,在活性炭:CaF_2∶NaF:赤泥=16∶12∶12∶100,焙烧温度1150℃,焙烧时间120min的条件下进行铁的还原焙烧,经水淬冷却后,磨矿时间10min,在磁选场强为2.0A(1940 Oe)的条件下进行磁选,最终可得到品位和回收率分别为81.75%和85.96%的铁精矿。 Red mud is alkaline solid waste produced during alumina production. In the paper, iron recovery from red mud is studied via reduction roasting process foUowed by magnetic separation. Based on a series of analysis of red mud, the effects on test results of different parameters are studied, including reaction time, reaction temperature, types and dosage of reducing agents, type and dosage of additives as well as magnetic field. The working mechanism of additives is analyzed. The study shows that when the carbon power： NaF2： CaF： red mud is at 16： 12： 12： 100, roasting at 1150℃ for 120 rain, quenching and then grinding for 10 min, separating at magnetic field intensity of 2.0A （ 1940 Oe）, and total content of iron in concentrated materials is 81.75% recovery ratio 85.96%.

关 键 词： 赤泥 直接还原焙烧 磁选 回收铁 添加剂