Abstract
An experimental annular concentric nozzle was made to study its features for gas atomization of molten steel and factors governing particle sizes. From experimental results the following conclusions were obtained. The nozzle must be adjusted so as not to focus the gas stream at the steel stream to avoid blowing up of molten steel and it was less effective for atomization than the individual jet nozzles(IJN) used by Lubanska. It showed narrower distribution of mean particle sizes, than IJN.
The following expressin was obtained for the mean particle diameter χm,
χm=2.9D(M/A·1/√W)2/3
D : nozzle diameter
M : molten steel flow rate
A : gas flow rate
W : Weber number
It can express the experimental values fairly well under the present conditions.
