Аңдатпа
Physicochemical characteristics of Krasnogorskii off-grade bauxite used at the Pavlodar aluminum plant are investigated, and its qualitative and quantitative composition is presented. It is found that, in the system of alumina production, the evaporation unit serves as the place of maximum oxidation of all forms of sulfur of lower valences to sulfates. The main methods of removal of sulfur in the technological cycle of alumina production are demonstrated. These are removal of ferruginous sands, an increase in amount of the reducing agent in the sintering charge, and periodic removal of the soda-sulfate mixture.