国外某悬浮焙烧—磁选高铝铁精矿降铝试验

金属矿山 ›› 2019, Vol. 48 ›› Issue (08): 58-62.

国外某悬浮焙烧—磁选高铝铁精矿降铝试验

朱一民^1,2，王燕^1,2，张婧²，谷晓恬^1,2，李艳军^1,2

1. 东北大学资源与土木工程学院，辽宁沈阳110819；2. 辽宁省难采选铁矿石高效开发利用技术工程实验室，辽宁沈阳110819

出版日期:2019-08-15 发布日期:2019-10-10
基金资助:
基金项目：国家自然科学基金项目（编号：51474055，51774069，51674066）。

Aluminum Reduction Test of a High Alumina Iron Concentrate from Suspension Roasting-Magnetic Separation Abroad

Zhu Yimin^1,2，Wang Yan^1,2，Zhang Jing²，Gu Xiaotian^1,2，Li Yanjun^1,2

1. College of Resource and Civil Engineering， Northeastern University， Shenyang 110819， China； 2. Technical Engineering Laboratory of High Efficient Exploitation and Utilization of Refractory Iron Ore in Liaoning， Shenyang 110819， China

Online:2019-08-15 Published:2019-10-10

摘要/Abstract

摘要： 国外某铁矿石经悬浮焙烧—磁选得到的铁精矿TFe含量为64.50%、Al2O3含量为5.95%，主要铁矿物是磁铁矿，少量赤铁矿。为解决其Al₂O₃含量较高的问题，研制了一种新型阴离子捕收剂DTL-1，通过改变浮选温度、矿浆pH值、捕收剂DTL-1用量对悬浮焙烧—磁选后的高铝铁精矿样进行脱铝试验。结果表明：在温度25 ℃、pH值8.0、捕收剂DTL-1用量50 g/t的条件下，采用1粗3精1扫的浮选闭路试验流程，最终获得了TFe品位66.40%，TFe回收率87.81%，Al₂O₃品位4.90%的浮选铁精矿产品。浮选铁精矿产品中粒度较大的磁铁矿颗粒中包裹着细粒的氧化铝矿物，在优先确保铁的回收率前提下，部分含铝铁氧化物进入铁精矿，因而也造成了铁精矿中铝含量较高的情况。

关键词: 高铝铁矿石, 脱铝捕收剂, 浮选性能

Abstract: The content of TFe and Al2O3 in an iron concentrate from suspension roasting-magnetic separation abroad was 64.50% and 5.95% respectively， main iron mineral is magnetite， little hematite. In order to solve the problem of high Al₂O₃ content in the concentrate， a new type of anionic collector DTL-1 was developed. Aluminium remove experiment was conducted on high-alumina iron concentrate after suspension roasting-magnetic separation via changes of flotation temperature， pH value and the dosage of collector DTL-1. Results indicated that， flotation temperature was 25 ℃， the pH was 8.0 and collector DTL-1 dosage was 50 g/t， through one roughing three cleaning one scavenging closed circuit flotation process， flotation concentrate with TFe grade of 66.40%， TFe recovery of 87.81%， Al₂O₃ grade of 4.90% was obtained. There is fine-grained alumina minerals wrapped in relatively coarse magnetite particles of flotation iron concentrate products. On the premise of ensuring the recovery of iron， some aluminum-containing iron oxides enter into the iron concentrate， resulting in the high content of aluminum in the iron concentrate.

Key words: High alumina iron ore, Dealumination collector, Flotation performance

朱一民, 王燕, 张婧, 谷晓恬, 李艳军. 国外某悬浮焙烧—磁选高铝铁精矿降铝试验[J]. 金属矿山, 2019, 48(08): 58-62.

ZHU Yi-Min, WANG Yan, ZHANG Jing, GU Xiao-Tian, LI Yan-Jun. Aluminum Reduction Test of a High Alumina Iron Concentrate from Suspension Roasting-Magnetic Separation Abroad[J]. Metal Mine, 2019, 48(08): 58-62.

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