Mold powder composition and method for continuously casting employing the same

A mold flux powder composition and method for employing the same in the continuous casting of metals, particularly the continuous casting of stainless steel using a submerged-nozzle casting practice. The mold powder composition is, in percent by weight, 30 to 60 fly ash, preferably 40 to 55 fly ash, 10 to 30 calcium fluoride, preferably 10 to 25 calcium fluoride, up to 15 sodium carbonate, up to 15 calcium carbonate, up to 10 cryolite, up to 10 sodium borate, 2 to 8 graphite, 4 to 12 manganese oxide, preferably 5 to 10 manganese oxide, up to 15 powdered glass, and up to 5 iron oxide.