2012年11月29日星期四
Velocity of Ball Mill Affects Its Efficiency
The ball mill is composed by simplified cylinder, the hollow shaft and the grinding head parts, simplified cylinder is a long cylindrical tube equipped with a grinding body, cylinder is made of steel, steel grinding body is usually with steel ball, which can be selected according to the granularity of abrasive materials, and material from the mill feed end of the hollow shaft into the cylinder body; when ball mill does simplified rotation, due to inertia and centrifugal force, it is posted near the cylinder liner on the cylinder body and be took away; due to its own gravity it is thrown down to a certain height.
The rotary speed of ball mill directly determines the state of motion of the cylinder body of the grinding media and grinding operations effects. The lifting height of the balls in the ball mill is small when the speed is low. Because the gravity of the balls themselves, balls fall from the top as spilling off the state. So the impact of balls is small, the grinding effect is well. Stones are abrasive grinding, but the grinding effects are not very well; when rotary speed is increased, the balls will be promoted to a high level. Out of the cylinder, the ball goes up to a certain height along the whereabouts of the parabolic trajectory.
In the fall-down place, the impact of balls is strong. Stones are grinded by impacting, so the grinding effect is good. When the rotary speed exceeds a certain limit (high speed), without the whereabouts of the ball with the cylinder rotation, balls are in a centrifugal operation state. Now there is no impact on balls, grinding effects is very small role, so that the grinding stops. To a service-oriented brand integrity, as the professional manufacturer of complete sets of mining machinery, like mobile crusher, Henan Hongxing is always doing the best in products and service.concrete crusher: http://www.china-hxjq.com/p124.html
Ore and water is continuously fed from feeding port, going through the hollow shaft into the cylinder. When the cylinder works according to the prescribed number of revolutions, the grinding media (steel balls, steel bars or gravel) and ore in the role of the centrifugal force and friction, go along the cylinder wall and rise to a certain height, and then are thrown out off the cylinder wall , then fall and slide down, so that the ore stripping the role of impact and friction constantly being grated, ground ore and water to form slurry, continuously added pressure to promote the formation of ore and water continuously from the exhaust through the hollow journal mine discharge side, the completion of the grinding operation.
In the permitting condition, concentrate the ball mill on the special ball mill chamber and reform the ball mill chamber to a special acoustic booth. The effect of it will be better than that of the sound insulation cover. However, we must pay attention to solve the problems such as the monitoring in the operating of ball mill, the internal heat dissipation and the maintenance of the ball mill.
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