The main phases of the dusts are magnetite, suppression, chlorinated, conceits, telephoning, and calculated. As minor phases, dendrite, aerosolize, deltoids and energize were detected. In the sample studied, particles were mainly spherical and less than 60 GM. The caching of flue dust sample with water dissolved copper sulfates and zinc sulfates and, partially, arsenic oxides, in an exothermic process. The leaching of the residue after water leaching in several acid media increased the dissolution of copper and arsenic oxides and small amounts of zinc.
A preliminary study by hydrocarbons classification was carried out with the objective of to obtain two fractions: a coarse fraction rich in copper and a fine fraction rich in arsenic. However, results obtained in this sample were not very successful. In the stabilization study, the residue obtained after leaching he copper flash smelter flue dust with sulfuric acid was mixed with sludge from a paper factory (centralization process).
The smaller size fraction (N 12 pm) obtained in the hydrocarbons was also mixed with this sludge. Results obtained derived of the application of a standard leaching test over these residues indicate that they were stabilized. Thus, the resulting mixtures should be dumped without generating major environmental problems. 0 201 0 Elsevier B. V. All rights reserved. 1. Introduction Copper smelter flue dusts are generated in the parametrically process Of copper extraction.
The constituent elements, and their concentrations, depend on: the characteristics of the sulfated ores that are processed, the species and their concentration, the archetypes used in the different stages of the process and the conditions under which these stages operate. All these factors affect the chemical and mineralogical characteristics of the smelting dusts, thus explaining their variability and, consequently, the processes chosen for their treatment, which is based on the recovery of valuable elements and the stabilization of undesirable elements present in the dusts (Bias and Davenport, 1976).