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VALORIZATION OF SALT SLAG FROM ALUMINUM RECYCLING

Description: Salt slag is a by-product of aluminium recycling, classified as a hazardous waste (10 03 08), consisting mainly of chloride salts and alumina. Effective reuse of salt slag has economic and environmental benefits.

Salt slag is a by-product of aluminium recycling, classified as a hazardous waste (10 03 08), consisting mainly of chloride salts and alumina. Effective reuse of salt slag has economic and environmental benefits. Herein we present a sustainable technology based on the selective extraction of the salt slag constituents in suitable liquid phases and recovery of heat and chemicals used in the process. Advantages: Valuable resources are extracted from salt slag, which can be reused in the production of secondary and primary aluminium. The amount of hazardous waste is significantly reduced. The liquids used to extract salt slag constituents can be effectively recycled and the heat used for their recovery can be recuperated for continuous operation. By means of effective heat and chemical recycling, the operating costs are significantly reduced and are only a fraction of aluminium recycling. Purpose: Reduction of hazardous waste, recycling, production of secondary and primary materials, circular economy.

Organisation: University of Zagreb, Faculty of Chemical Engineering and Technology, Zagreb

Innovator(s): assist. prof. Marin Kovacic, PhD; prof. Ana Loncaric Bozic, PhD

Category: Chemistry

Country: Croatia (Hrvatska)

Gold Award