Abstract In this study, a novel separation method deploying planar air jets was proposed for the dry beneficiation of − 6 + 2 mm fine coal and a laboratory separation equipment was established. The separation principle of this method was based on the separation of horizontal movement trajectories of coal particles depending on the density differences when passing through the flow field of a planar air jet. The effects of operational parameters, including air jet velocity, air jet angle, feeding height, and feeding rate, on the beneficiation performance were experimentally studied and the results showed that all of these parameters had significant effects to varying degrees. The results also showed that the separation accuracy, the probable error E, is 0.2, indicating that this method can effectively beneficiate fine coal in a dry way.

中文翻译：

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使用平面喷气机干选粉煤

摘要 在这项研究中，提出了一种采用平面空气射流的新型分离方法，用于-6 + 2 mm 细煤的干法选矿，并建立了实验室分离设备。该方法的分离原理是基于煤颗粒通过平面空气射流流场时的密度差异来分离煤颗粒的水平运动轨迹。实验研究了喷气速度、喷气角度、进料高度和进料速率等操作参数对选矿性能的影响，结果表明所有这些参数都有不同程度的显着影响。结果还表明，分离精度、概率误差 E 为 0.2，表明该方法可以有效地对粉煤进行干法选矿。