It is well known that the fluorine in mold powder damages both casting machines and the environment of the earth.We have developed fluorine free mold powder that is called "PRIOS" for small size molds with an emphasis on uniform fluidity of powder slag at the meniscus.PRIOS is has the following1.Reduced breakout2.Improved steel quality3.Minimal corrosion of SEN4.Less corrosion of casting machine5.Reduced water treatment costPRIOS is being used at Tokyo Steel Utsunomiya Works.Tokyo Steel Utsunomiya Works has been successful using the fluorine free mold powder and is being operated as an environmentally friendly steel words since the beginning of the new century.
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