The investigation of breakage kinetics of vitrified sanitary ware wastes in laboratory scale ball and stirred mills

Abstract

ABSTRACTThis study is aimed to determine the grindability and kinetic behavior on grinding of vitrified sanitary ware wastes. The specific rates of breakage (Si) and the model parameters were determined through kinetic experiments to understand the grinding mechanisms of vitrified wastes. The breakage behaviors were determined experimentally by using mono-size fraction technique. The mono-sized samples of −2360 + 1700 µm, −1180 + 850 µm, and −425 + 300 µm were ground batchwise for the selected periods to determine the Si. At the end of each grinding period, using the material at different mono-size groups, particle size distributions and breakage behaviors of the products were determined. Depending on the grinding periods in both of the mills, energy consumptions and d80 values of grinding products obtained by varying grinding periods were determined. It was acquired that as the size group decreases breakage speed gets slower in the ball mill and increases in the stirred mill. An increase in the grinding period results in an increase in energy consumption, but there is no significant change in d80 size in grinding of vitrified waste in the ball mill. However, it was found that d80 size significantly decreases depending on the increasing grinding period in the stirred mill.