ボールミル粉砕によるサブミクロン粒子の製造とその評価

概要

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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 144 mm and the inner length of 130 mm.Its volume was about 2.1 liters.The grinding balls were also alumina with a diameter of 20 mm.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.The following results were obtained:(1) The final median particle size of ground products was independent of the mass of feed or balls.(2) The optimum grinding condition for production of submicron particles changed with grinding time in an early stage and it became constant in the later stage.(3) The surface area was propirtional to the mass of submicron particles in the ground peoducts.
社団法人日本材料学会の論文
1993-11-15