粉煤灰传导感应分选试验研究

为提高粉煤灰的综合利用率,减少资源浪费,利用传导感应电选试验台进行粉煤灰分选试验研究,通过改变极板板型、极板电压、极板间距、颗粒粒径等参数研究分选效果的影响因素,对分选产物进行对比。研究结果表明:凹型电极板的碳分选效果相对优于凸型电极板;精灰烧失量随电压增加呈先上升后降低的趋势;板间距增大会削弱板间电场强度及影响颗粒运动;粒径越小灰的烧失量越低,且不易分选。对分选产物分析表明,对于粒径48μm的粉煤灰分选效果较为理想,而对于细灰的效果则欠佳。分选中精灰烧失量最大可达21.89%,碳回收率最高达53.02%。

Experimental study on conduction induction separation of fly ash

To improve the comprehensive utilization of fly ash,the fly ash separation experiment was conducted on a conductive induction charging test bed in this paper.By changing the parameters of the plate type,the plate voltage,the plates spacing and the particle size,as well as the factors of sorting effect were studied,and comparative analysis of sorting products were carried out.Results show that the separation performance of the concave electrode plate is better than the convex electrode plate.With the increase of voltage,the ignition loss of fine ash shows an ascending tendency and decreases afterwards.The smaller particle size possesses lower loss on ignition and leads to difficult in sorting.The increase of plate spacing will weaken the strength of the electric field and affect the movement of particles.The effect of separation is ideal to coarse ash with particle size ＞48 pm,but it is relative poor to fine ash.After sorting,the maximum ash loss is 21.89％ and the recovery rate of carbon can reach 53.02％.