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东鞍山铁矿石脱泥-反浮选工艺流程研究 总被引:1,自引:2,他引:1
东鞍山铁矿石的矿石类型及铁矿物种类多,矿物嵌布粒度细,矿泥量大,阴离子碱性正浮选流程不能适应矿石性质的变化。脱泥-反浮选流程适应东鞍山铁矿石的特性,通过对关键技术的研究,可在常规磨矿细度(-0.075mm占85%)下实现脱泥-反浮选工艺。工业分流试验表明,对于正常矿石,可获得铁品位63.66%,回收率80.13%的铁精矿;对于难选矿石,铁精矿品位62.83%,回收率75.48%。 相似文献
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云南某铜选厂矿石矿泥含量大,导致尾矿铜品位高并还含有大量矿泥。尾矿中铜主要分布在+37 μm粒级,铜在该粒级分布率为66.07%;-10 μm粒级产率为44.39%,而铜在该粒级分布率仅11.41%。采用旋流器预先脱泥、脱碳工艺进行预处理,在旋流器锥角为10°、沉砂口直径为3 mm、给矿压力为0.15 MPa、给矿浓度为11%时,获得的沉砂铜品位为2.35%、回收率为72.41%。沉砂中铜虽然主要以次生硫化铜形式存在,但铜的氧化率达30%以上。为确定沉砂的合理选矿工艺,进行了硫化铜、氧化铜依次选别和硫化铜、氧化铜混合选别探索性对比。结果表明,硫化铜、氧化铜依次选别工艺指标优于硫化铜、氧化铜混合选别工艺。采用硫化铜、氧化铜依次选别工艺,在磨矿细度为-0.074 mm占90%的条件下,以水玻璃、六偏磷酸钠为脉石抑制剂、硫化钠为氧化铜矿物活化剂、丁基黄药为捕收剂进行闭路浮选,获得了精矿铜品位为15.16%、作业回收率为81.05%、对原矿回收率为58.69%的选别指标。 相似文献
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Low pulp density and low grade slurries in the coal and minerals industries are discharged as waste to tailings dams, incurring significant losses of valuable particles. This paper investigates the rapid processing and cleaning of hydrocyclone overflow coal slurry using two laboratory scale Reflux Flotation Cells in series as a means to economically beneficiate low quality tailings streams. The Reflux Flotation Cell incorporates a novel arrangement of inclined channels to enhance bubble-liquid segregation, enabling extremely high gas rates and liquid rates per unit of vessel area. Hence, in the first stage, fast flotation is employed to rapidly recover fine coal particles using a feed flux of 11.4 ± 0.5 cm/s, up to an order of magnitude increase in the throughput rate over conventional flotation systems. First stage product was then sent to a second stage for counter-current washing using fluidisation wash water to produce a fully deslimed product, having ash percent in agreement with the minimum ash attainable using flotation as determined through tree flotation analysis. The results demonstrate the potential for two-stage Reflux Flotation to deliver high throughput at a high separation efficiency from low quality slurry, with a fivefold reduction in the required vessel footprint, thus overcoming the principal economic deterrent of having to install banks of large-scale flotation cells. 相似文献
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选择性磁种絮凝工艺是近来发展起来的一种分选微细粒弱磁性铁矿石的新工艺。该工艺是并合原理在复杂微细粒悬浮体系颗粒间相互作用理论中应用的又一典范,其核心就是将选选择性磁种分选民高分子絮凝分选工艺有机结合中强化聚团分选,本文阐述选择性磁种絮凝工艺对美国蒂尔登铁矿石竽经试验的研究,并给出最终交响乐尼试验指标及研究结论。 相似文献
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