摘要
通过动态水模拟试验考察了喷头转速、气体流量和喷头浸入液体深度三个因素与气泡尺寸的关系,利用二次回归正交试验方法设计试验过程。试验结果表明,可以观察到气泡床的偏移,在特定的容积内喷头转速对气泡尺寸的影响最大,其次是气体流量,而喷头浸入深度对气泡尺寸影响较小。在现有的模拟试验条件下,当喷头转速215 r/min、气体流量2.94 m3/h、喷头浸入深度551 mm时,可以获得最理想的气泡尺寸。用相应设备处理铝熔体时,对铝熔体的含氢量进行测定。结果表明,在适宜的结构空间内,大叶轮、低转速的合理工艺组合可以获得较理想的除气效果。
The relationships between bubble size and the speed of impeller, the gas flow and the immersion depth of impeller were studied by dynamic water simulation experiment. The experiment course was arranged as quadratic regression orthogonal method. The results show that the shift of bubbles group can be observed, meanwhile, in a special volume the impeller speed exerts the most significant influence upon the bubble size, followed by the gas flow, and the nozzle immersion depth exerts the least. The idle bubble size was observed when the nozzle speed is 215 r/rain, the gas flow is 2.94 m3/h and the immer- sion depth of nozzle reaches 551 mm under exiting eonditions. The hydrogen content of aluminum smelt was tested, which was purified by the device designed according to the structure and dimension of water simulation box, the results indicate that high degassing efficiency can be obtained when a proper joint technologies of big impeller and low speed of nozzle were employed in a tank with proper structure.
出处
《轻合金加工技术》
CAS
北大核心
2010年第3期18-24,共7页
Light Alloy Fabrication Technology
关键词
动态水模拟
旋转喷吹净化
回归正交试验方法
dynamic water simulation
rotary impeller purification
quadratic regression orthogonal method
