DISSOLUTION OF BRAUNITE IN SULFURIC-ACID-SOLUTIONS

In this investigation the dissolution of Braunite from Oltu, Erzurum-T urkey in sulfuric acid solutions was studied. In the experiments, part icle size, acid concentration, solid-to-liquid ratio, stirring speed a nd reaction temperature were chosen as parameters. It was observed tha t the dissolution rate increased with increasing acid concentration an d reaction temperature, and with decreasing panicle size and solid-to- liquid ratio, while no pronounced effect of stirring speed was observe d. The activation energy for this process was found to be 40.95 kJ mol (-1). Copyright (C) 1996 Elsevier Science Ltd