Procedure to remove the arsenium and antimony of the residues of the calcination of sulfidic iron minerals, especially waste from piritas, and for the clorificating recovery of the non-ferrous metals contained in these waste (Machine-translation by Google Translate, not legally binding)

摘要

Procedure to remove the arsenic and antimony from the residues of the calcination of sulfidic iron minerals, especially pyrite residues and for the chlorifying recovery of the non-ferrous metals contained in these residues, characterized in that the calcination residues are treated at higher temperatures at 500º, preferably at about 700 to 900º, with such halogenic compounds which simultaneously act as weak reducing agents that do not appreciably attack the iron oxide in the calcination residues. (Machine-translation by Google Translate, not legally binding)