宣龙式鲕状赤铁矿矿物学特征及分选技术

摘要

Separation technology of Xuanlong‐type oolitic hematite has been a technical problem in the world .The mineralogical characteristics study results of low grade(TFe<40% ) PangJiaBao oolitic hematite show that the main iron mineral is hematite ,and the gangue minerals mainly are quartz ,epidote ,chlorite and so on .Oolitic hematite ore and gangue minerals distribute as circular concentric layers .Because the iron mineral and gangue mineral are mixed in mineral aggregate ,it is difficulty to achieve mineral liberation and separate the minerals .Strong magnetic separation‐flotation separation ,strong magnetic separation‐gravity separation ,magnetic roasting‐low intensity magnetic separation‐flotation separation are the main separation process of Xuanlong‐type oolitic hematite ,but there is no mature industrial application examples at present . Strengthening ultrafine grinding technology and selective dissociation technology ,developing the micro particle separation process ,equipment and agent ,innovating the metallurgy and mineral associated process , and determining reasonable processing limit are the development tendency of Xuanlong‐type oolitic hematite . It will provide support for industrial application of refractor iron ores by strengthening the processing technology research .%宣龙式鲕状赤铁矿的分选利用一直是世界性的技术难题。庞家堡的低品位（T Fe＜40％）的鲕状赤铁矿石工艺矿物学特征研究表明，铁矿物主要为赤铁矿，脉石矿物主要为石英、绿帘石、绿泥石等，鲕状赤铁矿与脉石矿物呈层间同心环状分布。集合体内含铁矿物和脉石矿物相互夹杂，造成矿物单体解离和相互分开困难。宣龙式鲕状赤铁矿分选工艺技术主要为强磁抛尾‐浮选提铁降硅技术、强磁抛尾‐重选精选提铁技术、磁化焙烧‐弱磁‐浮选技术，目前尚没有成熟的工业应用范例。强化超细磨和选择性解离技术、发展微细颗粒分选工艺技术、设备和药剂和创新选冶联合流程，确定合理选矿界限是宣龙式鲕状赤铁矿选矿未来的发展趋势。通过加强相关选矿技术研究，将会为突破此类难选铁矿资源规模工业应用瓶颈提供支撑。