LADLE FILLING MATERIAL FOR VACUUM REFINING

摘要

PURPOSE: A ladle filling material for vacuum refining is provided to prevent expansion in using basic refractory material and to recycle resources with waste bricks. CONSTITUTION: In a refractory composition of a ladle filling material for vacuum refining, the amount of waste brick is decided depending on particle size of the brick containing over 20wt% of chrome oxide. That is, about 10-20wt% of the waste brick is used in less than 1mm and 10-25wt% of the brick is used in 1-3mm of particle size. 10-25wt% of waste brick is used in 3-5mm and 5-15wt% of the brick is used in over 5mm. 20-30wt% of magnesia clinker and 5-7wt% of polyglycerin is also added to the composition.