含硼铁精矿工艺矿物学及其综合利用技术研究-中南大学学报.PDF

第 46 卷第 8 期 中南大学学报自然科学版( ) Vol.46 No.8 2015 年 8 月 Journal of Central South University (Science and Technology) Aug. 2015 DOI: 10.11817/j.issn.1672-7207.2015.08.003 含硼铁精矿工艺矿物学及其综合利用新技术 余建文，高鹏，韩跃新 ( 东北大学 资源与土木工程学院，辽宁 沈阳，110819) 摘要：对辽宁凤城某选厂含硼铁精矿的工艺矿物学特征及其综合利用技术进行研究。研究结果表明：矿石中的硼、 铁分别主要赋存于硼镁石及磁铁矿中，主要脉石矿物为蛇纹石、云母及碳酸盐矿物。矿石中矿物连晶复杂、共生 关系密切；采用煤基选择性还原−磁选新工艺，于 1 125 ℃还原 150 min、碎磨至粒径小于 74 μm 的颗粒质量分数 占65%、磁场强度为 80 kA/m 的分选条件下，可获得铁品位为92.71%、回收率为 95.11%的磁性物；非磁性物即 硼精矿含 B O 14.27% ，硼的回收率为 88.69%。 2 3 关键词：含硼铁精矿；工艺矿物学；综合利用；硼铁分离 中图分类号：TF553 文献标志码：A 文章编号：1672−7207(2015)08−2785−06 Mineralogical characteristics and comprehensive utilization of Boron-containing concentrate YU Jianwen, GAO Peng, HAN Yuexin (School of Resources and Civil Engineering, Northeastern University, Shenyang 110819, China) Abstract: The mineralogical characteristics and comprehensive utilization technology of boron-containing concentrate were studied. The results show that boron and iron mainly occur in the form of szaibelyite and magnetite, and the primary gangue minerals are serpentine, mica and carbonate minerals. Mineral composition and crystal of the ore are complex. Based on the new process of coal-based selective reduction−magnetic separation, the iron grade of magnetic substances is 92.71% and the recovery of iron is 95.11% under the conditions that the partied grinding size below 74 μm is 65% and magnetic field intensity is 80 kA/m after roasting at 1 125 ℃ for 150 min. As for nonmagnetic substances, the B O grade