Determinación del contenido de zinc en residuos producidos durante el proceso de galvanizado por inmersión

Abstract

In the hot galvanizing process, remnants are produced that must be removed to avoid a poor quality in the coating of the product. During the hot dip galvanizing process, by-products are obtained both in the tubs and in galvanizing pails, which can be reused. The objective of this study was to recover Zinc from the by- products generated during the hot dip galvanizing process. The study was carried out by characterizing the chemical composition, density, and quantity of the by-products generated during the galvanizing process, which were recovered: Zinc, dross, droplet, and Zinc fines. The monthly average of the by- products generated for one year was 6,900 kg of dross, 5,800 kg of drop and 5,300 kg of zinc fines. 6500 kg of recovered Zinc were obtained. 43% Zinc was recovered. The results were favorable to be able to carry out the recovery of the mineral. It is concluded that it is necessary to work on the recovery of Zinc, since there will be economic savings, and it will also collaborate with the care of the environment by preventing Zinc residues from going to wastewater.