In the reduction period of AOD production stainless steel slag has a high melting point when the binary basicity is above 2.0

More than 15 kg/t fluorite was added to complete the slag melting. The mechanism of slag reduction in AOD was analyzed

and the effect of slag reduction without fluorite at different alkalinity was tested. The results show that

the results show that it is feasible to rely on the low-basicity technology for the primary reduction of slag

but the secondary reduction should be added

that is

the basicity of the primary reduction of AOD slag should be controlled at 1.7

and lime and fluorite should be added for the secondary reduction and desulfurization after slag pouring to prevent the carburization caused by ladle erosion caused by steel peroxidation. At the same time

in order to eliminate the carburization of lime and maintain good activity

the reduction o£ secondary adding lime was controlled at 2% 〜4%.