粉煤灰分级用旋流器试验研究

Experimental study on fly ash classification of hydrocyclone

针对目前粉煤灰综合利用问题,通过使用直径150 mm旋流器,对粉煤灰进行分级试验研究。通过控制变量的方法,改变旋流器的底流口直径、粉煤灰质量分数和进料压力等参数,得到粉煤灰在底流和溢流中的不同粒度分布,研究各变量对分级性能的影响规律。研究结果表明,随旋流器底流口直径增大,粉煤灰质量分数减小,进料压力增大,得到溢流中粉煤灰的质量分数减小,溢流中小于45μm颗粒质量分数增大,粉煤灰的分级效率相应提高。当底流口直径为18 mm,粉煤灰的质量分数为15.53%,进料压力为0.04 MPa时,溢流中分离粒度d50为43.9μm,质效率达到64.18%,量效率为88.09%,溢流中小于45μm粉煤灰质量分数达到90.58%,达到一级粉煤灰标准。

Aiming at the problem of comprehensive utilization of fly ash, the separation experiments were done using fly ash as the raw material with the diameter of 150 mm hydrocyclone. The underflow diameter, feed concentration and feed pressure were studied by controlling variables. Particle size distribution of fly ash were obtained and the influence of different parameters on the performance of the classification were studied. The experimen tal results show that with the underflow diameter increases, the feed concentration decreases, the inlet pressure increases, the classification performance of fly ash inproved obviously. When the underflow diameter is 18 mm, the feed concentration is 15.53%, the feeding pressure is 0.04 MPa, the d50 of the overflow is 43.9 μm, The qualitative reached 64.18%, the quantitative efficiencies reached 88.09%. In the overflow, the content of -45 Ixm reached 90.58%, and the fly ash reached the standard of the first grade.