湖南省已探明的铁矿资源中,赤铁矿约占80％,其中大部分是低品位、嵌布细、含磷较高的难选矿石。近年来省内有关单位对此类贫赤铁矿曾进行了大量选矿试验研究工作。初步结果表明,这类矿石若不细磨,用重选、浮选、强磁选及其联合流程处理,或用焙烧—磁选方法处理,得到的铁精矿品位均难达到60％,回收率一般小于80％。 Among the proven iron ore resources in Hunan Province, hematite accounts for about 80% of the total, most of which are low-grade, finely-embedded and high-phosphorus refractory ores. In recent years, relevant units in the province have carried out a large number of beneficiation experiments and studies on such poor hematite. The preliminary results show that if the ore is not finely ground, it is hard to reach 60% of the grade of iron concentrate if it is treated by re-election, flotation, strong magnetic separation and its combined process or by roasting-magnetic separation method. Rate is generally less than 80%.