河南某铁矿石工艺矿物学研究

Process Mineralogy of an Iron Ore In Henan Province

为充分利用河南某铁矿资源,对该铁矿石进行工艺矿物学研究。结果表明:1该铁矿石铁品位34.31%,有害元素硫、磷含量较低,属酸性氧化铁矿石,具有回收价值的铁矿物为磁铁矿和镜铁矿,占总铁的88.63%;2磁铁矿呈中等稠密—稀疏或星散浸染状嵌布在脉石中,嵌布粒度较粗,多在0.3~1.5 mm,+0.3 mm粒级占96.79%;镜铁矿主要以中等稠密浸染条带状和稀疏—星散浸染条带状产出,大多呈定向排列特征,粒度细小,-0.30 mm粒级占57.14%;磨矿细度-0.075 mm 90.33%时,镜铁矿单体解离度在96%以上;3脉石矿物以石英和白云母为主,与铁矿物共生关系简单,为选别创造了良好条件。推荐采用磨矿—弱磁选—强磁选工艺回收磁铁矿和镜铁矿,但应加强对微细粒级的尘粒状镜铁矿的回收,以避免尾矿中铁含量偏高。该矿石工艺矿物学研究结果可为下一步的选矿工艺提供理论支持和技术指导。

In order to make full use of an iron ore resource from Henan,process mineralogy research was conducted on the ore. Results indicated that: 1iron grade is 34. 31%,harmful element S and P content is low,belongs to acidic oxide ferric ore,iron mineral with recycling value is magnetite and specularite,accounting for 88. 63% of total iron; 2magnetite exists in medium dense-sparse or scattered impregnated clothly embedded in the gangue,coarsely disseminated,most of which in 0. 3 ~ 1. 5 mm,graded +0. 3 mm accounted for 96. 79%; Specularite mainly exists in medium dense disseminated banded and sparse,scattered article impregnation strip production,mostly assumes the directional arrangement characteristic,particle size small,- 0. 30 mm accounted for 57. 14%; Specularite monomer liberation degree is above 96% at grinding fineness- 0. 075 mm 90. 33%; 3Main gangue mineral is quartz and muscovite,and simply symbiotic with iron minerals,create a good condition for processing. Grinding-low intensity magnetic separation-high intensity magnetic separation process was recommended to recovery magnetite and specularite,the dust fine grained granular specularite recycle should be enhanced to avoid high Fe content tailings. The process mineralogy research can provide theoretical support and technical guidance for the next step of mineral processing.