Patent ID: 6016981
Filing Date: 2000-01-25
Classification: B02C,B22F,C01B,C22C,Y02E,Y02P,Y10S

Abstract:
An apparatus for producing a hydrogen adsorption alloy, comprising a rotatable main shaft and a high speed ball mill in the form of a planetary ball mill mounted to said rotatable main shaft, said planetary ball mill having a housing mounting a plurality of mill pots for rotation, each mill pot defining an axis of rotation and each being detachably connected to means for converting the atmosphere in each mill pot to a non-oxidizing atmosphere, means for rotating said planetary ball mill about said main shaft wherein each mill pot revolves about said main shaft, and means for rotating each mill pot on its own axis in the same direction as the planetary ball mill rotates about the main shaft, wherein the composite milling acceleration ratio G applied to the internal part of each mill pot is at least 30 and the rotational angular velocity ratio R is at most 1.9, said composite milling acceleration ratio G being expressed by:G=amax/g=(.omega.1).sup.2 /2g(K+N.times.(1+R).sup.2),where G is the composite milling acceleration ratio;a max is the composite milling acceleration (m/S);g is the acceleration of gravity (m/S);.omega.1 is the angular velocity of revolution (1/S);K is the diameter of revolution (m);N is the internal diameter of the mill pot (m);.omega.2is the relative angular velocity of rotation with respect to revolution (1/S); andR is the ration .omega.2/.omega.1.