A PROCESS FOR REPROCESSING OXIDIC BY-PRODUCTS CONTAINING ARSENIC

摘要

The invention relates to a process for reprocessing oxidic by-products containing arsenic, such as dust and the like, obtained in processes for pyrometallurgical copper production, such that the arsenic content is reduced to a level that permits the by-products to be further treated in the process, while copper and other metal values present remain in the products. The method is characterised in that the oxidic by-products are treated at a temperature of 670 °C to 770 °C in a fluidised bed under reducing conditions in which the arsenic contained in the products is vaporised and transferred to the gas phase present in the bed. The gas is then purified in respect of arsenic in a suitable manner, while the treated products are returned to the process at a suitable point for recovering their metal content.