Investigation of Chalcopyrite Cuprum Concentrate Roasting by Thermogravimetric and Differential-Thermal Analysis  Full text

L. E. Sargsyan, A. M. Hovhannisyan

State Engineering University of Armenia
105 Teryan, Yerevan, 0009, Armenia

UDC 669.2/.8

Metall. Min. Ind.,  2010, Vol. 2, No. 3, pp. 225-229

Abstract

Phase transformations taking place in chalcopyrite cuprum concentrate when heating up in the polythermal treatment schedule were investigated. It is shown that sulfides of copper and iron pass into water-soluble sulfatic phases in the low-temperature interval to 676 °C. These phases transform into oxides at higher temperatures which is unfavorable from the point of view of advanced complex hydrometallurgical method of these metals recovery. The optimum temperature of sulfatizing roasting was determined.

Keywords: CONCENTRATE, CHALCOPYRITE, PYRITE, CALCINATION, POLYTHERMAL HEATING, PHASE TRANSFORMATIONS