How to ventilate the ball mill

In Industry News07/12/20214 Minutes

Ventilation in the ball mill is a problem that should be paid attention to during the work of the beneficiation ball mill equipment. The material generates a lot of heat during the grinding process, which greatly increases the temperature in the mill and the temperature of the material exiting the grinding, which deteriorates the operation and affects the production efficiency of the ball mill. Therefore, internal ventilation is very important in the work of the ball mill, which has a significant impact on the output and quality of the mill. It can be said without hesitation that the internal ventilation of the ball mill equipment can directly affect the efficiency of the grinding.

The ventilation effect of the ball mill is roughly in two aspects: one is to discharge the fine powder in the mill in time, so as not to affect the grinding efficiency; second, to reduce the temperature in the mill to avoid the grate of the gypsum dewatering tail bin paste ball. When the material moisture is too large and the mill has poor ventilation, the water vapor in the mill is difficult to discharge, not only the wet fine powder adheres to the grate, but also reduces the throughput and flow rate of the material per unit time. At the same time, when these grinding bodies grind materials, due to static electricity, the working surface of the liner will be attached to form a cushion layer, which will greatly weaken the impact and crushing function of the grinding bodies on the materials. When the thickness of the fine powder adhered to the surface of the lining board reaches 1mm, the impact force of the grinding body on the material can be reduced to one third when there is no material, which in turn leads to a decrease in the output of the mill and an increase in the power consumption of the grinding.

In the face of these problems of the ball mill, a simpler solution is to add an axial fan on the top of the exhaust tube of the mill tail, and at the same time seal and plug the mill rotary screen, discharge chute and other parts to prevent the short circuit of the mill ventilation due to air leakage. When the ball mill is working, the torque is transmitted to the large and small gears of the ball mill through the motor and reducer, so that the barrel of the ball mill rotates. Due to the rotation of the barrel of the ball mill and the cylinder liner, a part of the steel ball is brought to a certain height. The free fall motion produces impact force and hits the material in the cylinder, and the rest of the steel balls fall down to produce friction and the material is mixed together. As the cylinder rotates, it constantly collides and grinds with the material, so that the inside of the mill is ventilated smoothly. , It also completely solves the problem of grinding head dust. Similarly, the air lock system must also be done well, otherwise, the fan air will be drawn directly from the discharge port, forming a ventilation short circuit, and there will be not much air in the mill.

In the production of ball mills, if you have a detailed understanding of the importance of good ventilation of the ball mill, you must strengthen the management of the barrel ventilation of the ball mill and achieve reasonable ventilation, thereby improving the production efficiency of the ball mill and the pass rate of the milled materials.