For the current work, extensive surveys have been performed on an industrial overflow ball mill, processing iron ore. The slurry density was set to different values by adapting the water addition flow at the mill inlet. The mill is equipped with a Sensomag which provides information about the ball load and pulp volume, values and positions. For each density
tested, mill discharge slurry samples were taken and assessed for density and Blaine. The load position and mill absorbed power were recorded by the Sensomag. The ball level was kept constant throughout the surveys with the help of a Magoload.