Based on a 120 t converter

the 3-dimensional mathematical model has been established and the calculation of Euler two phases is carried out to get reasonable eccentric position of gas permeable elements for bottom blowing. O- riginal even distribution mode of 8 permeable elements with eccentric position 0. 56 R ( radius of converter bath) at an angle of 45 ° is optimized and modified to 6 permeable elements of which 2 elements with eccentric position 0. 53 R

2 elements with 0. 65 R and 2 elements with 0. 46 R

center angle of two group combined gas permeable brick being 180° and inner angle 30°. Production practice shows that after optimization it is available to decrease consumption of bottom blowing gas

increase bath stirring energy and decrease carbon-oxygen concentration product to 0. 002 513 from original 0. 002 674.