With the increasing variety of laboratory ball mills, how to choose the right ball mill has become a problem. For example, planetary ball mills , laboratory drum ball mills , laboratory agitated ball mills , light horizontal ball mills ... a series of laboratory ball mills to understand the difference, has become a way to quickly select the right model.
The difference between laboratory ball mills is divided into planetary type, drum type, stirring type, etc. The grinding method includes dry grinding and wet grinding, while ordinary ball milling and high energy ball milling are carried out by the action of the grinding ball. The level of energy is distinguished.
At present, there is no relevant standard for ordinary ball milling and high energy ball milling. If it is only identified by the rotation speed at the time of grinding, it is not accurate. We can't say that the same equipment is a normal ball mill at 10r/min, and it becomes a high-energy ball mill at 100r/min.
It may be clearer to compare them with a conventional ball mill and a high-energy ball mill in a laboratory ball mill. The drum type ball mill is a very classic ordinary ball mill, and the planetary ball mill is widely used in high-energy ball milling such as mechanical alloying. It is a very popular high-energy ball mill. For the same size model, the planetary ball mill has a maximum speed of more than 1000r/min, while the drum type ball mill is about 100-200r/min. The energy generated by the ball mill is high.
You may ask if this is not the difference in speed? Of course not, the drum ball mill is very simple to do 1000r/min, but the models on the market are mostly between 100-200r/min, because the drum ball mill is not limited by such a high speed because it is limited by the critical speed. Once the centrifugal force generated by the rotational speed exceeds the gravity of the grinding ball, the grinding ball moves simultaneously with the ball grinding can, and is relatively stationary, and the grinding completely fails. Planetary ball mills are a variety of centrifugal force interactions. The planetary structure balances multiple forces and is always able to grind effectively, using most of the energy for ball milling.
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