PROCESS AND APPARATUS FOR THE PREPARATION OF FINE POWDERS

摘要

Methods and means for grinding materials to fine powders in a media mill (1) in which the materials are ground while immersed in a liquid which is a gas at room temperatures and pressures. The powdered materials produced are predominantly in a size range of from about 10 to about 40 micrometers. Other benefits may be achieved if the gas is in a supercritical state.