Abstract
In order to study the influence of feed particle size on energy efficiency for production of fine particles, autogenous grinding tests were carried out using a stirred mill. The mill used was made of stainless steel and its volume was about 5.5 liters. The impellers were always run at a rotational speed of 69 rev/min. The sample used was limestone. The material was charged 5 kg and the feed size were 2.0-1.3, 1.3-1.O and1.0-0.67cm, respectively. The ground products were sieved in the size range from the feed size to 3μm.
As a result, it was found that the energy consumption to produce the particles finer than 3μm decreased with increase in the feed size and it became minimum when the feed size was closer to the distance between the top edge of the impeller and the wall of mill.
