关键词: 微细粒赤铁矿, 超细磨, 强磁选机, 浮选柱, 浮选药剂

Abstract: The research status and development tendency of beneficiation technology, key equipments and flotation reagents for China's fine and micro-fine disseminated refractory hematite ore was summarized. Research status, problems and also solutions for dealing with hematite was introduced through examples of hematite in Anshan region, Yuanjiacun iron ore of TISCO, Qidong iron ore of Hunan province, estuary type iron ore of Hunan province, Ningxiang type oolitic hematite. Hematite deposits in our country have characteristics of finely disseminated and closely associated with gangue minerals of similar physical and chemical properties. The key to reduce beneficiation costs of micro-fine disseminated hematite is to develop high efficient and low energy consumption of ultrafine grinding mills, vertical vibratory mills, horizontal vibratory mills, etc. Research and develop of high intensity magnetic separator, which can efficiently and economically separate hematite with grain size of -0.038 mm, to replace flocculation-desliming flotation beneficiation process can save costs and reduce environmental pollution from reagents. Compared with conventional flotation machines, flotation column have advantages of large quantity, small footprint, low energy consumption, density foam etc. development of flotation and its optimal utilization in hematite beneficiation process is an effective way to improve the recovery and utilization rate of resources. Research and develop hematite flotation collectors with low-temperature resistance, high selectivity, low dosage in separation was significantly important for energy conservation and cleaner production of mine.

Key words: Micro-fine disseminated hematite, Ultrafine grinding, High intensity magnetic separator, Flotation column, Flotation reagents