某难选高磷赤褐铁矿提铁降磷选矿试验研究

Research on Iron Increase and Dephosphorization of Refractory High-phosphorus Hematite-limonite Ore

云南某铁矿石铁矿物主要以赤褐铁矿形式存在,磷含量0.586%,属于高磷难选铁矿石,采用常规单一选矿方法难以获得令人满意的选别指标。试验采用还原焙烧-磁选-反浮选工艺流程处理该矿石,获得了铁品位为61.72%、磷含量为0.20%的铁精矿,铁回收率为67.48%,为类似难选高磷赤褐铁矿的开发利用提供了新的思路。

Hematite and limonite are the dominant iron minerals in a Yunnan iron ore. As the phosphorus content amounts 0. 586% , the iron ore belongs to a high-phosphorous refractory one, which can not be satisfactorily processed by conventional method. A processing flowsheet, comprising reduction roasting, magnetic separation and reverse flotation, was introduced to treat the ore, and an iron concentrate with an iron grade of 61.72%, a reduced phosphorus content of 0.20% , and an iron recovery of 67.48% can be obtained. It brings forth a novel solution for the exploitation and utili- zation of analogous high-phosphorus hematite-hmonite ore resources.