电磁效应对重介旋流器粗煤泥分选的影响

本文通过研究螺线圈的励磁电流和磁场位置等,探究了电磁场对重介旋流器分选煤泥的影响。通过精煤产率、精煤灰分和尾煤灰分三个指标来判断电磁场对重介旋流器煤泥分选的效果。实验结果表明:外加螺线圈的电磁效应可以调节旋流器的分选密度,且B型螺线圈在提高旋流器分选密度的方面,有着比A型螺线圈更广泛的电流调节范围;螺线圈位于旋流器筒体段,弱电流作用时其对煤泥分选精度的提高较有益,螺线圈越靠近筒体上端,强电流产生的磁感应使旋流器的分选工况得到影响;微电流作用下,螺线圈的位置不同,产生的磁感应强度均能提高旋流器对煤泥分选。

Effect of electromagnetic effect on coarse slurry separation by dense medium cyclone

The influence of the electromagnetic field on the medium distribution in the dense medium cyclone is investigated by studying the insertion depth of the overflow tube,the excitation current of the coil and the position of the magnetic field.The influence of magnetic field on slurry separation in dense medium cyclone was judged by three indexes of clean coal yield,ash content of clean coal and ash content of tailings.The experimental results show that:The electromagnetic effect of the external screw coil can adjust the separation density of the cyclone,and the type B screw coil has a wider range of current regulation than the type A screw coil in improving the separation density of the cyclone;the screw coil is located in the cylinder section of the cyclone,and when the weak current acts,it is more beneficial to improve the separation accuracy of coal slime.The closer the spiral coil is to the upper end of the cylinder,the magnetic induction produced by the strong current reduces the separation of the cyclone.The magnetic induction intensity produced by the different coil positions under the action of micro-current can improve the separation of coal slime by the cyclone.