Yg. Park et al., The effect of operating parameters and dimensions of the RH system on meltcirculation using numerical calculations, ISIJ INT, 41(5), 2001, pp. 403-409
Melt circulation as a function of the operating conditions and dimensions o
f the RH system were calculated using a 3-dimensional numerical model. This
numerical model was developed with considering the driving force by gas bl
owing for melt circulation and was verified from both water model experimen
ts and real RH process results.
Using the numerical model, the influences of various parameters on melt cir
culation were investigated. The parameters can be divided into two categori
es, the operating conditions and dimensions of RH system. The effects of ea
ch operating parameters such as gas flow rate, the pressure of the vacuum v
essel and submerged depth of the snorkel on the melt circulation rate were
studied. In addition, the effects of the dimension parameters of the RH sys
tem such as the number of nozzles and snorkel diameter were also investigat
ed.
By synthesizing the calculated melt circulation for various conditions, a s
imple model, which can predict the melt circulation without calculating the
three dimensional fluid flow, was developed. Using this prediction model,
the effects of the various parameters on melt circulation could be calculat
ed easily.