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近年来, 选煤中的大直径重介旋流器和浮选柱的大量应用翻译公司, 使得煤炭的有效分选粒度分别向上和向下的方向延伸, 从而造成粒度介于重选和浮选粒度交界附近的粗煤泥分选效率最低, 因此粗煤泥分选问题成为影响精煤产率提高的主要瓶颈。液固流化床粗煤泥分选机是近几年刚刚研制成功利用流态化原理分选粗煤泥的一种新型设备, 具有结构简单、分选效果好等优点, 适合粒度范围窄、需要低密度的粗煤泥分选。
In recent years, application of a great deal of dense-media cyclones of large diameter and flotation columns has allowed the effective granularity in the separation of the coals to respectively extend upwards and downwards, but which has reduced the separation effect of coarse slime which is between gravity separation and flotation. So the separation of coarse slime has become the key point affecting the clean coal yield. The liquid-solid fluidized bed coarse slime separator, a new type of equipment, has excellent separation results and with simple configuration. The research about it has just begun in China. The separation theory can match the characteristics of narrow granularity bound, low density separation of coarse slime.
液固流化床粗煤泥分选是在粒度不同的高浓度固体颗粒环境中实现分选的过程北京翻译公司, 其内部颗粒与颗粒、颗粒与流体之间存在着极为复杂的关系, 同时物质流动存在上升水和入料矿浆的给入、固体颗粒的下降流和上升流、水的下降流和上升流等, 通过对液固流动状态、物料运动平衡关系和分选区域内分层动力学的机理探讨, 研究液固流化床粗煤泥分选机内的物料流动特性, 对于揭示液固流化床粗煤泥分选机按密度分选的机理具有十分重要的意义。
The liquid-solid fluidized bed coarse slime separation has been materialized in the dense solid granules of different granularities, in cases where the most complex connection either between the granule and the granule or between the granule and the liquid does exist. Also, the materials flow as the feed of the upward current and the feeding slime , the downward current and the upward current of the solid granule and the water. It is of great importance to reveal the separation mechanism of the liquid-solid fluidized bed coarse slime separator as per their respective densities, by means of the discussion on the mechanism among the liquid-solid flow state, material motion balance and the separation dynamics in the separation area, and the study on the material flow characteristics in the liquid-solid fluidized bed. |
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