Optimization of CAS Process by Physical Model Study

In order to optimize the process of a 230 t CAS ladle,a physical model has been built with a scale factor of 1:4.Location of bottom lowing,gas flow rate and depth of the snorkel have been optimized by mixing time test,and the appropriate gas flow rate for deslagging has been determined in deslagging experiment.The results show that position of plugs for better mixing can be seen in scheme 8(plug 1 and 2 are 600 mm and 1 000 mm from the center of ladle bottom respectively and the intersection angel between these two plugs is 100°);the optimum gas flow rate for mixing should be 600~700 NL/min;the depth of snorkel is about 200 mm for better mixing.Where the thickness of slag layer is 80,120,160 mm,the gas flow rate for deslagging should be more than 600,800,1 000 NL/min respectively.