METHOD FOR CONTROLLING ELUTION OF HEXAVALENT CHROMIUM FROM STEEL SLUG AND MATERIAL FOR LAND BURIAL OF THE SLUG

摘要

PPROBLEM TO BE SOLVED: To provide an inexpensive method for controlling elution of hexavalent chromium which controls effectively the amount of hexavalent chromium eluted from stainless steel slug produced in melting and refining of the steel. PSOLUTION: The elution of hexavalent chromium from stainless steel slug can be controlled effectively by mixing one or more of compounds each containing an alkaline earth metal(s) with the slug. The elution of hexavalent chromium from steel slug can be controlled below a regulated standard by mixing the slug with one or more of calcium oxide, hydroxide and sulfate, magnesium oxide and hydroxide and dolomite as compounds containing an alkaline earth metals and waste concrete as a mixture containing alkaline earth metals. The resultant mixture can be used as a material for land burial. PCOPYRIGHT: (C)2005,JPO&NCIPI