Production of Submicron Particles by Ball Milling and its Evaluation.

Abstract

A demand for fine or ultrafine particles is increasing in many industries. It is well known that the energy efficiency in a grinding process decreases with a decrease in produced particle size and with an increase in grinding time or input energy. Therefore, the evaluation of fine or ultrafine grinding of materials is essential. In this paper, ball mill grinding was carried out on silica-glass to get Submicron particles and to evaluate the fine or ultrafine grinding process. The mill used was made of alumina with a diameter of 144mm and the inner length of 130mm. Its volume was about 2.1 liters. The grinding balls were also alumina with a diameter of 20mm. The effects of the mass of feed and the mass of balls on fine grinding were investigated at a constant rotatioal speed of the mill. The progress of grinding was evaluated by the mass of submicron particles and the surface area of ground porducts.