固气两相流雾化工艺规律

采用高压氮气为气相雾化介质,分别以NaCl颗粒和Fe粉为固相雾化介质,对Al-Si合金、金属Zn进行固气两相流雾化实验,系统研究了工艺参数对粉末平均粒度和形貌的影响规律.结果表明,固气两相流雾化存在最佳的固/气流率比,采用的固体介质颗粒只有既达到较高的浓度又具有较高速度,才能极大地提高雾化效果.同时,较高密度的固体介质、低金属液流量有利于获得平均粒度细小、形貌复杂、粒度分布更集中的金属粉末.

Process regularities of solid-gas dual media atomization

Al-Si alloy and metal zinc were selected as the samples to study the effects of atomization parameters on mean particle size, particle size distribution and particle morphology of the as-atomized powder with N_2 employed as the gas atomization medium and NaCl, Fe particle as solid atomization medium respectively. The results show that the metal powder with finer mean particle size and narrow particle size distribution can be produced under the conditions of proper mass flow rate of solid to gas in atomization medium, higher density of solid medium and lower metal mass flow rate.