THE SOLIDIFY METHOD OF STAINLESS SLAG

摘要

PURPOSE: Slag generated from the ironmaking/steelmaking process of an iron mill has been under stern supervision due to heavy metals. Especially, stainless slag has been limited in their usage because chrome oxides is contained in the stainless slag. Thus, it become an essential condition that environmental contamination causable from elution reaction of chrome ion should be carefully monitored before the stainless slag is used as structural aggregate. At present, several solidification methods such as cement solidification and plasma-assisted solidification that is generally applied to field to prevent heavy metal elution from stainless slag have been developed, however plasma-assisted solidification that is considered the most effective method to engineers has demerit in that its operation cost is relatively high and costly equipment. CONSTITUTION: A slag generated in the steelmaking process is blended with red clay in a blending ratio of 3:7 to 1:1 and then the mixture is heat treated in the temperature range of 1150 to 1250deg.C for 30-90min. Stainless slag that is solidified by the present method can be applied to the manufacture of tile or brick.