马钢罗河矿尾矿预富集——悬浮磁化焙烧——磁选技术研究

东鞍山含碳酸盐正浮选尾矿悬浮焙烧—弱磁选试验李文博;唐志东;杨光;韩跃新;李艳军【摘要】Iron grade of Donganshan direct-flotation tailings containing 43.53％ Fe,iron mainly exists in form of hematite,magnetite and siderite.Suspension roasting-magnetic separation was carried out in order to provide technique basis for utilization of the direct-flotation tailings.The results indicated that,with gas flow rate of 12 m3/h,H2 concentration 40％,suspension roasting temperature at 600 ℃ for 8 s,roasted products ground to-0.043 mm 95％,via low intensity magnetic separation at intensity of 85.1 kA/m,iron concentrate with iron grade of 60.52％ and recovery of 78.78％ was obtained.Magnetism and XRD analysis on materials both before and after the suspension roasting indicatedthat,iron-bearing low intensity magnetism material was changed to high intensity magnetism magnetite,enhance the magnetism,expanded the magnetism difference of iron ore and gangue minerals,effective separation can be obtained by low intensity magnetic separation.%东鞍山含碳酸盐正浮选尾矿铁品位为43.53％,主要含铁矿物为赤铁矿、磁铁矿和菱铁矿.为给该正浮选尾矿高效回收利用提供依据,采用悬浮焙烧—磁选工艺进行了选矿试验.结果表明:在气体流量为12 m3/h、H2浓度为40％、焙烧温度为600℃、焙烧时间为8 s条件下进行悬浮焙烧试验,焙烧产品磨细至-0.043 mm占95％,在磁场强度为85.1 kA/m条件下弱磁选,可获得铁品位为60.52％、回收率为78.68％的精矿.对悬浮焙烧前后物料的磁性检测、XRD分析可知,试样中弱磁性的含铁矿物经悬浮焙烧后转变为强磁性的磁铁矿,磁性增强,扩大了铁矿物与脉石矿物的磁性差异,可通过弱磁选进行有效分离.【期刊名称】《金属矿山》【年(卷),期】2016(000)012【总页数】5页(P13-17)【关键词】正浮选尾矿;悬浮焙烧;菱铁矿;磁性【作者】李文博;唐志东;杨光;韩跃新;李艳军【作者单位】东北大学资源与土木工程学院,辽宁沈阳110819;东北大学资源与土木工程学院,辽宁沈阳110819;鞍钢集团矿业公司,辽宁鞍山114001;东北大学资源与土木工程学院,辽宁沈阳110819;东北大学资源与土木工程学院,辽宁沈阳110819【正文语种】中文【中图分类】TD951.1;TD925.7我国铁矿石的主要特点是贫、细、杂，资源平均铁品位较低，复杂难选的含碳酸盐铁矿石所占比例较大，全国储量超过50亿t，其中辽宁鞍山地区的储量就有约10亿t[1-3]。

包钢选矿厂尾矿磁化焙烧—磁选回收铁的试验研究Chapter 1: Introduction- Introduction to the Baiyunebo Mine and Baotou Steel Rare Earth Company- Overview of the tailings produced by the Baiyunebo Mine- Background information on magnetization roasting and magnetic separationChapter 2: Experimental Design and Procedures- Research objectives- Experimental design and procedures for magnetization roasting and magnetic separation- Equipment used in the experiment- Chemical analysis methods used in the experimentChapter 3: Results and Analysis- Description of the physical and chemical properties of the tailings before and after treatment- Analysis of the efficiency of magnetization roasting and magnetic separation- Results of chemical and mineralogical analysis of the iron concentrate recoveredChapter 4: Discussion- Evaluation of the effectiveness of the process- Comparison of the results obtained to those reported in literature - Discussion of potential applications for the iron concentrate producedChapter 5: Conclusion- Summary of the key findings of the study- Implications of the results for the Baiyunebo Mine and Baotou Steel Rare Earth Company- Recommendations for future research and development of the process.第一章：引言稀土元素是一组重要的化学元素，其广泛用于制造高科技产品，如电池、磁铁和光学器件等。