The following process description is based upon a ball mill used in the hard rock mining industry for liberating minerals from ore but the operating principle for ball mills used in other industries is the same. Crushed ore is fed to the ball mill through the inlet; a scoop small screw conveyor ensures the feed is constant.
Ball Mill Operating Principles Components Uses . A ball mill also known as pebble mill or tumbling mill is a milling machine that consists of a hallow cylinder containing balls mounted on a metallic frame such that it can be rotated along its longitudinal axis The balls which could be of different diameter occupy 30 50 of the mill volume and its size depends on the feed and mill size.
Ball mill typical type of fine grinder is the ball millslightly inclined or horizontal rotating cylinder is partially filled with balls usually stone or metal which grind material to the necessary fineness by friction and impact with the tumbling balls ball mills normally operate with an approximate ball .
Ball mills are very similar in design and operating concept to rock tumblers which used milling media to polish rocks in a rotating cylinder. Ball mill machines usually include a cylinder a motor and crushing media.
Several types of ball mills exist. They differ to an extent in their operating principle. They also differ in their maximum capacity of the milling vessel ranging from 0.010 liters for planetary ball mills mixer mills or vibration ball mills to several 100 liters for horizontal rolling ball mills.
Ball mill operation is often regarded as something of a mystery for several reasons. Ball milling is not an art - it’s just physics. The first problem will ball mills is that we cannot see what is occurring in the mill. The other problem is that many of the independent variables are non-linear or have paradoxical effects on the end results.