摘要
为实现白云鄂博西矿TFe品位13%~16%铁素资源(含铁岩)的回收利用,本文以含铁岩为研究对象,通过采用化学分析、X射线衍射仪、光学显微镜等检测手段研究其矿石性质,并在此基础上进行系统的选矿试验。研究结果表明:该含铁岩中TFe品位13.14%,可回收的主要金属矿物为磁铁矿,占全铁比例为52.28%。含铁岩需破碎至−3 mm时才能获得TFe品位20%以上的预选粗精矿,且通过阶段破碎-分级预选流程试验可获得尾矿抛除产率56.01%、粗精矿TFe品位20.62%、磁性铁品位14.80%、TFe回收率69.19%、磁性铁回收率94.27%的技术指标,推荐采用三段破碎-两级预选-高压辊磨超细碎抛尾的原则流程作为预选技术改造方案。将预选粗精矿细磨至−0.045 mm含量85.80%时,经过两次弱磁选后最终获得TFe品位65.10%、TFe回收率50.25%、磁性铁回收率93.03%的合格铁精矿。该研究结果可为含铁岩的高效回收利用提供科学依据。
In order to achieve the recycling and utilization of iron resources(iron bearing rocks)with a TFe grade of 13%-16%in the Bayan Obo West Mine,this paper takes the iron bearing rocks as the research object,and conducts detailed research on their ore properties using chemical analysis,X-ray diffraction,optical microscopy and other detection methods.Based on this,systematic beneficiation experiments are conducted.The results show that TFe grade in the iron bearing rock is 13.14%,the main recoverable metal mineral is magnetite,and accounts for 52.28%of the total iron.The iron bearing rock needs to be crushed to−3 mm in order to obtain a coarse concentrate with TFe grade of over 20%.Through the stage crushing grading pre-selection process experiment,the tailings removal yield can be 56.01%,the TFe grade of the coarse concentrate is 20.62%,mFe grade is 14.80%,TFe recovery rate is 69.19%,and mFe recovery rate is 94.27%.The principle process of three stage crushing two-stage pre-selection high-pressure roller grinding ultra fine crushing and tail throwing is adopted as the pre-separation technology transformation plan.Under the particle size condition of−0.045 mm 85.80%,a qualified iron concentrate with TFe grade of 65.10%,relative TFe recovery rate of 50.25%,and mFe recovery rate of 93.03%can be obtained by two weak magnetic separations of the coarse concentrate.The research results provide a scientific basis for the efficient recycling and utilization of iron bearing rock.
作者
唐绍义
李彦鑫
TANG Shaoyi;LI Yanxin(Barun Mining Company of Inner Mongolia Baotou Steel Union Co.,Ltd.,Baotou 041010,China)
出处
《中国矿业》
北大核心
2024年第1期226-234,共9页
China Mining Magazine
关键词
白云鄂博西矿
含铁岩
超贫铁矿石
干式预选
资源化利用
高压辊磨机
Bayan Obo West Mine
iron bearing rock
extremely lean iron ore
dry pre-separation
resource utilization
high pressure grinding roll
