鹿犬价格:Ball mill

Ball Mill　Introduction

The Ball mill is widely used for milling various kinds of ores or rocks in metal and non-metal mining and building material industry. The main bearing of the ball mill with the shell diameter 900-2100mm is spherical liner bearing; for the shell diameter 2700mm, the main bearing is completely closed self-aligning 120°bearing with strong alloy of high lead and low tin with low hardness, underneath laid with cooling copper piping full of water The bearing is of static pressure structure with high and low pressure united oil lubricating system.

A ball mill operates by rotating a cylinder with steel grinding balls, for the ball to fall back into the cylinder and onto the material to the ground. The rotation is usually between 4 to 20 revolutions per minute, depending upon the diameter of the mill. The larger the diameter is, the slower the rotation will be. If the peripheral of the mill is too great, it begins to act like a centrifuge and the balls do not fall back, but stay on the perimeter of the mill.

The ball mills are generally used to grind material 1\4 inch and finer, down to the particle size of 20 to 75 microns. To achieve a reasonable efficiency with ball mills, they must be operated in a closed system, with oversize continuously being recalculated back to the mill to be reduced.

Ball Mill Structure Features

This Ball mill is made up of feeding part ,discharging part, gyre part, transmission part(decelerator, small transmission gear, generator, electrical control )and so on .The hollow axis adopts the cast steel and the rotary big gear is processed from cast rolling gear .The barrel body wears well and bears wearable scale board.

And compared with the traditional ball mill, the motor power of the energy-saving ball mill can reduce the power by 18-25%, lubrication of 70% and comprehensive energy-saving of over 20%.And during the normal function, we need not to change the main axis, which can save a lot of maintenance cost and time .And the main bear adopt oil grease, which is convenient to avoid the heavy metal pollution.

Ball Mill　Working Principle

The materials will be crushed and mixture by the impact effect of falling grinding body (steel ball and pebble) and grinding effects of the inner surface of the ball mill. And at the same time, the eccentric force produced by the rotating of the barrel will bring the steel ball to a certain height and the grinding body will be brought up first and then down second according to the rotating direction, which will have the heavy bash and grinding effect. And then the materials will receive the continuous crushing.

This ball mill has a better grinding condition and will precede the crushing process in the closed machine with no dust pollution.