Comparison of selective flocculation of low grade goethitic iron ore fines using natural and synthetic polymers and a graft copolymer

This study aims to beneficiate low grade goethitic iron ore fines using a selective flocculation process. Selective flocculation studies were conducted using different polymers such as starch amylopectin(AP), poly acrylic acid(PAA), and a graft copolymer(AP-g-PAA). The obtained results were analyzed; they indicate the enhancement of the iron ore grade from 58.49% to 67.52% using AP-g-PAA with a recovery of 95.08%. In addition, 64.45% Fe with a recovery of 88.79% was obtained using AP. Similarly, using PAA, the grade increased to 63.46% Fe with a recovery of 82.10%. The findings are also supported by characterizing concentrates using X-ray diffraction(XRD) and electron probe microanalysis(EPMA) techniques.

某复杂难选铁矿石提铁降硅工艺研究

对山西某难选高硅铁矿石进行了可选性试验研究。针对矿石嵌布粒度很细的特点,采用阶段磨矿阶段选别工艺提铁降硅。得出适宜的磨矿制度:一段磨矿粒度为-0.074 mm粒级占40%,二段磨矿粒度为-0.038 mm粒级占85%;对粗精矿再磨后的不同选别工艺进行了对比,推荐最佳的工艺为磁-浮联合选别,可获得全铁品位为65.37%、二氧化硅含量为4.26%的铁精矿,达到了较好的提铁降硅效果。

某磁铁精矿反浮选提铁降杂试验研究

研究了不同磨矿粒度条件对磁铁精矿反浮选提铁降杂效果的影响,对比试验结果表明:细磨可增加铁矿物单体解离度,改善分选指标,但粒度过细,会恶化浮选环境。矿样磨至-45μm粒度占90%,通过一粗二精一扫、中矿返回的闭路流程试验,最终获得产率为81.12%,铁品位为67%,回收率为91.27%的浮选铁精矿,铁精矿中氟、磷、硅等杂质含量低,脱除率高。

马坑矿业选厂新增磁选柱精选试验与生产实践

马坑矿业选矿厂通过2013年底磁选柱提高品位试验,并将磁选柱设备引入生产实践,有效提高了铁精矿生产品位,取得了良好的经济效益。

提高某铁精矿铁品位试验研究

某铁矿石选厂现行工艺技术落后,设备陈旧,从而导致生产指标波动幅度大,铁精矿品位低,含杂质高。针对该选厂的现有工艺流程,提出采用细筛-弱磁-中矿再磨再选工艺,对含Fe 65%的粗精矿进行提铁降杂试验,并获得了铁精矿品位67.45%,回收率96.50%的优良选矿指标。