Method and device inertization and recovery of Flying ashes, and other similar special industrial waste

摘要

Method of treatment in aqueous waste (1) special heavy metals and salts, wherein: - the residue (1) is supplied as divided; - the residue to a maturing stage (17), whereby provided in an aqueous suspension (25) is aged tempered is subjected; - a solid fraction matured (33) which is subjected to repetitive washing operations (35) and solid / liquid separation until the solid fraction (43) meets the requirements of safety to the environment is collected; the method being characterized in that prior to the maturation stage of waste: - a test that determines the content of calcium chloride in the residue (1) is performed; - a heat treatment is performed at elevated temperature (3) of the residue when the test result shows a content of exceeding a reference value established calcium chloride.