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METHOD FOR COST-EFFECTIVE PRODUCTION OF ULTRAFINE SPHERICAL POWDERS AT LARGE SCALE USING THRUSTER-ASSISTED PLASMA ATOMIZATION

机译:推力辅助等离子体雾化法大规模生产超细球形粉末的成本效益方法

摘要

A metal powder plasma atomization process and apparatus comprises at least one plasma torch, a confinement chamber, a nozzle positioned downstream of the confinement chamber and a diffuser positioned downstream of the nozzle. The nozzle accelerates liquid metal particles produced by the at least one plasma torch and also plasma gas to supersonic velocity such that the liquid metal particles are sheared into finer powders. The diffuser provides a Shockwave to the plasma gas to increase temperature of the plasma in order to avoid stalactite formation at an exit of the nozzle. The process increases both production rate of the metal powder and the yield of −45 μm metal powder.
机译:一种金属粉末等离子体雾化工艺和设备,包括至少一个等离子体炬,限制室,位于限制室下游的喷嘴和位于喷嘴下游的扩散器。喷嘴将由至少一个等离子炬产生的液态金属颗粒以及等离子气体加速至超音速,以使液态金属颗粒被剪切成更细的粉末。扩散器向等离子体气体提供冲击波以增加等离子体的温度,以避免在喷嘴出口处形成钟乳石。该过程增加了金属粉末的生产率和-45μm金属粉末的产率。

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