青海快3

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铁矿石高效选矿设备跳汰选矿技术

责任编辑:admin 发表时间:2016-05-10 11:01

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  我国铁矿床类型多,品位低,赋存条件和矿石类型复杂,硫、磷、硅等有害组分含量高,多组分共生铁矿石储量大,有用组分嵌布粒度细,造成铁选矿难度大、效率低、产品质量差。随着铁矿资源的大量开采,易选矿石锐减,贫、细、杂、难选矿石日趋增多。我国已探明铁矿石储量的97.5%是需要选矿加工的贫铁矿。我国许多铁选厂,生产工艺设备相对落后,难以稳定高效地生产高质量铁精矿。为了确保钢铁生产,2003年我国进口铁矿石高达1.4亿t。我国加入wto后,国内铁选厂直接面临进口富矿的冲击挑战,因此,积极研究开发高效选矿技术设备,经济高效地生产高质量铁精矿已成为迫在眉睫的重大课题。

  低磁场自重介跳汰机青海快3将磁电、跳汰和重介质选矿结合在一起,充分利用磁铁矿和脉石之间性质的差异,可经济、高效地生产高质量铁精矿。电磁磁系磁场强度可调,在机体内由磁力、重力和水流联合作用,可有效去除连生体和夹杂的脉石,生产高质量铁精矿。维尔霍夫斯基等人采用近代示踪观测技术,第一次直观地揭示了跳汰过程的重介质作用,并提出了扇形分层假说。在跳汰过程重矿物的颗粒沿床层垂直方向的运动速度是变化的,在中间部位速度最低,表示该区域穿透性最小;而轻矿物的颗粒下落到中间层后,不能穿过中间层,复又上升,具有跳跃运动的性质。它好似一道栅栏,起着分割轻重矿物的作用。可以将该“中间层”看成是“重介质层”。

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