摘要：在气力循环输送提升管实验装置中检测氧化铝粉体的流动状态,在提升管的不同测点位置布置电磁感应线圈,添加铁磁颗粒作为输运物料氧化铝的示踪颗粒,利用电磁感应声卡信号采集装置测量电磁感应系数。结果表明,电磁感应系数与气力输送提升管内的氧化铝、铁磁颗粒流量存在线性关系,随着测点高度的增大,电磁感应系数逐渐减小;提升管发生堵塞时,堵塞测点截面以上的电磁感应系数开始减小,截面以下各测点的电磁感应系数开始增大;通过增大喷动风量,可有效改善提升管内颗粒的分布状态。

关键词：氧化铝粉体；铁磁颗粒；气力输送；流动状态

Abstract： The flow state of alumina powders was detected by the pneumatic circulation conveying experiment device. The electromagnetic induction coil was located in different measuring points of the riser. The ferromagnetic powders as tracer materials of alumina particles were added. The electromagnetic induction sound signal acquisition device was used for electromagnetic induction coefficient value measurement. The results show that the electromagnetic induction coefficient value and alumina ferromagnetic particles flow exist linear relation. With the increase of the measuring point height, electromagnetic induction coefficient value decreases. When the riser clogs, the electromagnetic induction coefficient above congestion point section begins to decrease, that of below congestion point section begins to increase. By increasing air flow, the distribution state of particles can be effectively improved. 

Keywords: alumina powder; ferromagnetic powder; pneumatic conveying; flow state