河南某铁铜矿石结构构造及矿物组成均较简单,有用矿物磁铁矿和黄铜矿的粒度均较粗。为了确定2粗3精2扫闭路优先浮铜尾矿弱磁选选铁的合理工艺流程,开展了直接1粗1精弱磁选、弱磁粗选精矿磨矿后弱磁精选、先磨矿后1粗1精弱磁选3种工艺选...河南某铁铜矿石结构构造及矿物组成均较简单,有用矿物磁铁矿和黄铜矿的粒度均较粗。为了确定2粗3精2扫闭路优先浮铜尾矿弱磁选选铁的合理工艺流程,开展了直接1粗1精弱磁选、弱磁粗选精矿磨矿后弱磁精选、先磨矿后1粗1精弱磁选3种工艺选铁试验。结果表明,弱磁粗选精矿磨矿后弱磁精选工艺效果最佳,在再磨细度为-0.074 mm 90%、弱磁粗选和弱磁精选磁场强度分别为95.54 kA/m和67.58 kA/m情况下,可获得铁品位65.50%、回收率53.53%的铁精矿。展开更多
This paper mainly studies the dynamic direction of engineering valuation based on the artificial neural network methods,and seeks for a set of rapid,convenient and practical valuation models,for building construction ...This paper mainly studies the dynamic direction of engineering valuation based on the artificial neural network methods,and seeks for a set of rapid,convenient and practical valuation models,for building construction projects.展开更多
文摘河南某铁铜矿石结构构造及矿物组成均较简单,有用矿物磁铁矿和黄铜矿的粒度均较粗。为了确定2粗3精2扫闭路优先浮铜尾矿弱磁选选铁的合理工艺流程,开展了直接1粗1精弱磁选、弱磁粗选精矿磨矿后弱磁精选、先磨矿后1粗1精弱磁选3种工艺选铁试验。结果表明,弱磁粗选精矿磨矿后弱磁精选工艺效果最佳,在再磨细度为-0.074 mm 90%、弱磁粗选和弱磁精选磁场强度分别为95.54 kA/m和67.58 kA/m情况下,可获得铁品位65.50%、回收率53.53%的铁精矿。
基金"Challenge Cup"Support Project of Science and Technology Innovation Fund for College Students of Nanjing University of Engineering(No.TZ20200014)。
文摘This paper mainly studies the dynamic direction of engineering valuation based on the artificial neural network methods,and seeks for a set of rapid,convenient and practical valuation models,for building construction projects.