Patent ID: 6196480
Filing Date: 2001-03-06
Classification: B02C

Abstract:
A ball mill comprising:a) a milling chamber into which metal powder is fed;b) milling means for milling metal powder into fine metal powder having a particle size less than a predetermined size, with a quantity of heat (Q.sub.0) generated in the milling chamber during the ball mill operation;c) liquid cooling means for causing cooling liquid to flow along the outside wall of the milling chamber to remove a quantity of heat (Q.sub.1) during the ball mill operation; andd) gas cooling means for causing cooling gas to flow through the milling chamber to remove a quantity of heat (Q.sub.2) during the ball mill operation,wherein the liquid cooling means and the gas cooling means cooperate to counterbalance the generated quantity of heat (Q.sub.0) with the sum of the removed quantities of heat (Q.sub.1) and (Q.sub.2) so as to prevent the inside of the milling chamber from overheating, when the ball mill operates in the condition of Q.sub.0 /V.gtoreq.0.05 kW/l, at a predetermined temperature of 100.degree. C. and less, where V is the inner volume of the milling chamber.