真空感应熔炼气体雾化过程中钢包喷嘴堵塞:导流管几何形状的影响  

Ladle Nozzle Clogging in Vacuum Induction Melting Gas Atomization:Influence of Delivery-Tube Geometry

作　　者：王军峰 夏敏[1] 吴嘉伦 葛昌纯[1] Wang Junfeng;Xia Min;Wu Jialun;Ge Changchun(Institute of Special Ceramics and Powder Metallurgy,University of Science and Technology Beijing,Beijing 100083,China)

机构地区：[1]北京科技大学粉末冶金与先进陶瓷研究所,北京100083

出　　处：《稀有金属材料与工程》2022年第9期3214-3222,共9页Rare Metal Materials and Engineering

基　　金：Central University Basic Research Fund of China (FRF-GF-19-0058)。

摘　　要：研究了真空感应熔炼气体雾化(VIGA)技术中喷嘴堵塞的过程。为了更准确地了解导流管顶端形状对喷嘴堵塞的影响,采用计算模拟流体体积界面跟踪方法,对一次雾化区的两相流进行了模拟。结果表明,导流管末端的小平台是导致喷嘴堵塞的关键因素。因此,改进了输送管的扩张角(30°、35°、40°、45°),缩短了小平台的宽度,解决了喷嘴堵塞的问题,实现了雾化连续性,提高了雾化效率。此外,当扩张角为40°~45°时,粉末具有较好的微观形貌,粒径为21~25μm。不同改进角度下的数值模拟结果与实验结果显示出相似的趋势。本研究对了解VIGA工艺喷嘴堵塞过程具有指导意义和参考价值。The nozzle clogging in vacuum induced melting gas atomization(VIGA) process was investigated.To understand the influence of tip shape of the delivery-tube on nozzle clogging more accurately,the interface tracking method of computational simulation fluid volume was adopted to simulate the two-phase flow in the primary atomization region.Results show that the small platform at the end of the draft tube is the key factor leading to the nozzle clogging.Therefore,the expansion angle(30°,35°,40°,45°) of the delivery-tube is improved to shorten the width of the small platform.Thus,the nozzle clogging is solved,the atomization continuity is realized,and the atomization efficiency is improved.Additionally,when the expansion angle is 40°~45°,the powder has better morphology with the particle size of 21~25 μm.The numerical simulation results under different modification aspects display similar trends to the experiment ones.This research is of guidance significance and reference value to understand the nozzle clogging process of VIGA process.

关 键 词：合金 粉末 气雾化 导流管 堵漏包 

分 类 号：TF133[冶金工程—冶金物理化学]