81 2018年8月
过程与工艺
过程工程学报
The Chinese Jourmal of Process Engineering
Vol.18 No.4 Aug.2018
DOI: 10.12034/j.issn.1009-606X.217357
Magnetization roasting-magnetic separation of cyanidetailingsbased on high
intensity magneticpreconcentration Pingfeng FU1,2,Zhenyu LI',Zhenzhong BIAN
1. School of Civil and Resources Engineering, University of Science and Technology Beijing, Beijing 100083, China
2. State Key Laboratory of High-efficient Mining and Safety of Metal Mines, Ministry of Education, Beijing 100083, China
separation, was used to prepare iron concentrate from roasted cyanide tailings with TFe grade of 30.71% in Henan province. Tbe results showed that rough iron concentrate with TFe grade of 44.96% and recovery rate of 78.27% was obtained with high intensity magnetic separation at the magnetic field intensity of 1511.54 kA/m. The rough iron
treated with two-stage grinding and two-stage magnetic separation. The iron concentrate with TFe grade of 61.71% and recovery rate of 68.66%was obtained at the grinding fineness of less than 0.028 mm of 63.9%.Magnetic separation tailings, with a yield of 16.79%, could be classified as common industrial solid wastes due to no residual cyanides. Some hematite was not reduced at the temperature of below 7oo C, and reduced magnetite could be further transformed to magnesioferrite, fayalite and wustite at the temperature of above 80o C, which reduced the content of magnetite and resulted in loss of iron in the magnetic separation. As the roasting temperature was 75o C, the highest content ofmagnetite in roasted samples was achieved.
Key words: cyanide tailings; high intensity magnetic preconcentration; magnetization roasting; magnetic susceptibility 基于强磁预选的某氰化尾渣磁化焙烧一磁选工艺
傅平丰12，李振宇1，边振忠 1.北京科技大学土与资源工程学院，北京100083
2.金属矿山高效开采与安全教育部重点实验室，北京100083
摘要：以TFe品位为30.71%的河南某焙烧氰化尾渣为原料，采用湿式强磁预选-磁化焙烧-磁选联合工艺制备铁精粉.结果表明，当强磁预选的磁场强度为1511.54kA/m时，得到TFe品位44.96%、回收率78.27%的粗精矿；以该粗精矿为磁化焙烧原料配10wt%焦粉，于750C下磁化焙烧45min，焙烧样经二段磨矿、二段弱磁选，当二段磨矿细度小于0.028mm占63.9%时，可得TFe品位61.71%、回收率68.66%的铁精粉；产率为16.79%的弱磁选尾矿不含氧化物，转化为一般工业固体废物，焙烧温度低于700℃时，部分赤铁矿未还原；焙烧温度超过800℃时，生成的磁铁矿转化成镁铁矿、铁橄榄石和方铁矿，磁铁矿含量降
低，导致铁损失：焙烧温度为750C时，磁铁矿含量最高关键词：氟化尾渣；强磁预选：磁化焙烧；磁化率
中图分类号：TD951
文献标识码：A
文章编号：1009-606X(2018)04-077405
收稿： 20171019,修回; 20171201,网络发表; 20180108, Reeived: 20171019, Revised: 20171201, Published online: 20180108 基金项目：国家自然科学基金资助项目(编号：51674017)
作者简介：傅平率(1976-)，男，浙江省诸暨市人，博士，副教授，主要从事矿冶固度资源化和矿业污染控制研究，Tel:13520202167,E-mail:
pffu@ces.ustb.edu.cn
引用格式：傅平丰，李报字，边报忠，基于强磁预选的某氯化尾造磁化焙烧-磁选工艺。过程工程学报，2018,18(4)：774-778
eparation of cyanide tailings based on high intensity magnetic preconcentration
FuPF.LiZY,Bian Z Z.Magnetizationr
(in Chinese), Chin. J.Process Eng,2018, 18(4): 774778, DOI: 10.12034/j.issn.1009-606X.217357.
万方数据