鞍千铁矿石分质分选新工艺研究

Study on New Technology of an Iron Ore in Anqian

为解决鞍千选厂现有工艺流程复杂、选别效率低等技术问题,针对鞍千现场入选铁矿石在工艺矿物学研究的基础上开展了短流程分选新工艺试验。结果表明,原矿TFe品位28.99%,FeO含量为8.10%;矿石中的铁主要以磁铁矿的形式存在,铁在磁铁矿中分布率为60.80%,属磁赤混合型铁矿石;磁铁矿和赤铁矿嵌布关系密切,粒度粗细不均。矿石在实验室经陶瓷搅拌磨磨矿—弱磁—强磁—反浮选试验,可以获得TFe品位69.74%、回收率56.54%的二段弱磁精矿以及TFe品位66.75%、回收率83.19%的浮选精矿。矿石经球磨机磨矿—陶瓷球搅拌磨再磨—弱磁选—强磁选—反浮选扩大试验,最终可以获得TFe品位68.57%、TFe回收率85.17%的精矿,尾矿铁品位为6.43%。

In order to solve the technical problems of complex process flow and low separation efficiency in Anqian Concentrator,a new process test of short process separation is carried out on the basis of process mineralogy research on the iron ore in Anqian site.The results show that the TFe grade of the raw ore is 28.99%,and FeO content is 8.10%.The iron in the ore mainly exists in the form of magnetite,and the distribution rate of iron in magnetite is 60.80%,which belongs to maghemite mixed iron ore.Magnetite and hematite are closely related to each other,and the grain size is uneven.The two-stage low intensity magnetic concentrate with TFe grade of 69.74%and recovery rate of 56.54%and the flotation concentrate with TFe grade of 66.75%and recovery rate of 83.19%can be obtained by ceramic stirring grinding-low intensity magnetic separation-high intensity magnetic-reverse flotation test in the laboratory.A concentrate with TFe grade of 68.57%and TFe recovery of 85.17%is obtained,and the iron grade of the tailings is 6.43%after the raw ore subjected to ball mill grinding-ceramic ball stirring mill regrinding-low intensity magnetic separation-high intensity magnetic separation-reverse flotation expansion test.