Recuperación de zinc proveniente de polvos de acería usando solventes eutécticos profundos (des) : recuperación de zinc proveniente de polvos de acería utilizando como agente lixiviante el solvente eutéctico profundo (des): oxalina (cloruro de colina+ ácido oxálico).

Abstract

Steel mill dusts generate a major environmental problem because they are hazardous wastes that are part of the vapors that originate inside the smelting and refining furnaces in the industry dedicated to the production of this material. These wastes are released into the environment and contain heavy metals such as zinc, lead, and cadmium. Zinc, being the main component and valuable for its properties, becomes a key target for recovery. It is emphasized that current operations to treat these wastes, whether physicochemical, pyrometallurgical or hydrometallurgical, present considerable environmental challenges and high costs. In search of a more sustainable alternative, this study proposes the use of deep eutectic solvents (DES), specifically oxaline, to enact the release of zinc from steel mill dusts. Several tests were carried out with different temperature conditions and using compounds already known for their high oxidative power such as iodine, potassium permanganate and air. The results revealed a Zn recovery of 54.95% at 50°C promoted by the presence of iodine within the leaching process.