敞开式水雾化喷嘴

水雾化喷嘴是水雾化法生产金属粉末的关键设备。对于常规喷嘴,增大雾化夹角及提高雾化压力均可提高金属粉末的细粉率,但也都会遇到堵嘴问题,从而导致雾化过程中断。本研究分析了雾化过程中的堵嘴机理,设计了一种新型敞开式水雾化喷嘴,对其进行强度计算,并进行雾化试验。结果表明,此新型敞开式雾化喷嘴可以有效避免水雾化金属粉末过程中气囊的形成,可从根本上解决以往生产中经常出现的堵嘴问题。而对单个敞开式喷嘴而言,提高雾化夹角,增加孔数,以及提高雾化压力,均可以显著提高细粉率。

Open type water atomizing nozzle

Water atomization nozzle is the key equipment that influences the production of metal powder by water atomization method. The fine powder ratio prepared by using conventional nozzle can be improved by increasing the atomization angle and the atomization pressure, but the problem of nozzle clogging occurs frequently, which leads to the suspension of atomization process. In the present work, the mechanism of nozzle clogging was analyzed, based on which a new open-type water spray nozzle was proposed. The strength calculation and atomization test were carried out for the newly proposed open-type water spray nozzle. The results show that this new open-type nozzle can effectively prevent the formation of air bag in the process of metal powder production, thus fundamentally solving the problem of nozzle clogging. The fine powder ratio for a single open-type nozzle can also be improved by increasing the atomization angle, the number of holes and the atomization pressure.