2023-12-22
The emergence of laboratory planetary ball mills has solved many grinding problems.
Its grinding efficiency, grinding particle size, energy consumption reduction, and scope of application far exceed traditional ball mills.It has become the first choice for ultra-fine grinding of samples.
Let's first take a look at the internal structure of the planetary ball mill. There is a circular main wheel that rotates at high speed on the horizontal plane at the bottom of the working area. There are four tank seats evenly distributed around the wheel. A rotatable shaft in the center of the bottom of the tank seat. The detachable ball mill jar is placed inside the shaft and jar seat, and the grinding media and samples are placed inside the ball mill jar.
Working principle of planetary ball mill:
The operation mode of planetary ball mill is similar to the operation between stars and planets.
When the equipment is working, the main wheel plate rotates in one direction at high speed, while the axis inside the tank seat rotates in the opposite direction, and the two opposite directions rotate.
The force acts on the ball mill tank at the same time, and the energy obtained by the grinding medium inside the ball mill tank is very large.
At this time, the grinding media that obtains energy impacts, squeezes and rubs the sample to complete the grinding of the sample.
If the speed of the revolution of the main wheel and the rotation of the ball mill tank increases, the force will increase, the grinding energy will become larger, and the sample may be ground more finely. Therefore, the speed is an important factor in considering the performance of the planetary ball mill.
Compared with traditional ball mills, planetary ball mills not only have the characteristics of increased force and improved grinding effect and efficiency, but also have other advantages, such as small size and low noise.
The ball grinding jar of the planetary ball mill can be disassembled, so the ball grinding jar and grinding balls of various materials can be replaced according to the characteristics of the sample, such as agate, zirconia, corundum, nylon, etc. In addition, the temperature-controllable and pumpable grinding balls can be replaced. Vacuum or inert gas-filled ball mill jars increase the scope of sample grinding.
The planetary ball mill can drive four ball milling jars for grinding at one time, and can obtain four samples at the same time or grind four different samples, which improves the efficiency of laboratory grinding and preparation of samples.
The above is a brief introduction to the operating structure and working principle of the planetary ball mill. In today's laboratories, planetary ball mills have gradually replaced drum ball mills and are the machines most commonly used for fine and ultra-fine grinding of samples.
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