东鞍山贫杂铁矿石选矿技术研究进展

Research Status and Development Trend of Beneficiation Technology for Donganshan iron Ore with Low Grade and Complex Composition

  • 摘要: 东鞍山铁矿石资源储量丰富,但原矿品位低、组成复杂、嵌布粒度细、磨矿特性差,属典型难选贫杂铁矿石。但现有选矿流程存在的生产工艺复杂、粗细分级和再磨效率低、重选选别效果差、含碳酸盐铁矿石及尾矿固废资源无法高效利用等问题,总结了近年来东鞍山贫杂赤铁矿矿石选矿技术取得的进展,介绍了贫杂赤铁矿石“磨矿—弱磁选强磁选抛尾—搅拌磨磨矿—反浮选”短流程新技术、含碳酸盐铁矿石“悬浮磁化焙烧—磁选”新技术以及浮选尾矿“磁选预富集—悬浮磁化焙烧—磁选”新技术,为东鞍山贫杂铁矿石的高效开发与利用提供了新思路。

     

    Abstract: Donganshan Iron ore is rich in resources and reserves, but it is a typical refractory iron ore with low grade, complex composition, fine disseminated particle size and poor grinding characteristics.The existing beneficiation process has many problems, such as complex production process, low efficiency of coarse/fine classification and regrinding, poor effect of gravity separation and inefficient utilization of carbonate-containing iron ore and tailings.This study summarized the beneficiation technology progress of Donganshan iron ore in recent years, new technologies of "grinding-low intensity magnetic separation and high intensity magnetic separation-stirring grinding-reverse flotation" for poor hematite ore, "suspension magnetization roasting-magnetic separation" for carbonate bearing iron ore, and " preconcentration of magnetic separation-suspension magnetization roasting-magnetic separation" for the final flotation tailings were proposed, which provided a new idea for the efficient development and utilization of Donganshan iron ore.

     

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