印度尼西亚HARITA铁矿石选矿试验

印度尼西亚HARITA铁矿石属于难选氧化铁矿石,矿石中铁矿物以褐铁矿和假象赤铁矿为主,且矿石含泥较多。根据矿石性质对其进行选矿试验,首先将原矿洗去矿泥后筛分成40~6 mm块矿和-6 mm粉矿,然后对块矿进行干式强磁选,再将干式强磁选尾矿和粉矿合并磨至-0.076 mm占55%后进行弱磁选—高梯度强磁选,并对洗出的矿泥进行单独弱磁选,最终获得了铁品位为59.14%、铁回收率为57.92%的块精矿和铁品位为61.41%、铁回收率为21.61%的粉精矿,两种精矿总的铁回收率达到79.53%。试验结果不仅为HARITA铁矿石的利用提供了依据,也为东南亚同类型铁矿资源的开发提供了参考。

Experiment on Beneficiation of HARITA Iron Ore in Indonesia

Iron minerals in HARITA iron ore of Indonesia mainly exist in form of limonite and martite，with high content of slime，which belongs to refractory iron oxide ore.Beneficiation experiment is carried out based on its properties.Firstly，the slime is removed from raw ores by washing and then rough concentrate are screened into 40~6 mm blocks and -6 mm powders.Secondly，blocks are treated through dry high intensity magnetic separation，and its tailings mixing with powers are ground to be 55% -0.076 mm and separated by low intensity magnetic separation-high gradient magnetic separation.Low intensity magnetic separation is carried out on the washing slime.Block concentrate with iron grade of 59.14% and recovery of 57.92%，also powder concentrate with iron grade of 61.41% and recovery of 21.61% are received separately，with total Fe recovery of 79.53%.The results provide a basis for utilization of the HARITA iron ore，but also can be as reference for development of iron resources in the same type.