The jet pulverizer is a device that pulverizes materials through airflow. It is widely used in the fields of pharmaceuticals, chemicals, food, and more due to its high efficiency, uniformity, and fineness. When using the jet pulverizer, it is necessary to control the size of the particles, which is a very important task. This article will introduce the working principle of the jet pulverizer and how to control the particle size.
The Working Principle of the Jet Pulverizer
The working process of the jet pulverizer involves spraying the material into a specially designed grinding disc. Under the action of the high-speed rotating blade, the material is cut into extremely small particles, which are then taken away by the airflow and graded by the classifier to finally obtain the required size. Among these components, the airflow is key to controlling the size of the material, so it needs to be carefully managed.
Jet Pulverizer Particle Size Control Methods
1. Jet
Jet refers to the volume of gas passing through the jet pulverizer per unit of time. It is one of the main means of controlling the size of the material. The larger the airflow, the shorter the residence time of the material in the grinding disc, resulting in smaller particle sizes. Conversely, the smaller the airflow, the longer the residence time, and the larger the size. Therefore, by adjusting the airflow, the particle size can be controlled.
2. Classifier
The classifier is a very important part of the airflow mill. It can classify the material into different particle sizes to obtain the required particle size. The structure and principle of the classifier are such that gas and particles enter along the classifier, and through a specially designed curved pipe, the smaller particles are taken away, while the larger particles fall into the storage chamber at the bottom. Through different combinations of classifiers, materials of different sizes can be obtained.
3. Airflow Velocity
Airflow velocity is also one of the important parameters for controlling the particle size of the material. The higher the airflow velocity, the shorter the residence time of the material in the grinding disc, resulting in smaller particle sizes. Conversely, the lower the airflow velocity, the longer the residence time, and the larger the particle size. Therefore, by adjusting the airflow velocity, particle size can also be controlled.
4. Material Properties
The properties of the material will also affect the particle size control of the mill. For example, materials with higher hardness often require higher airflow velocity and smaller grinding disc spacing to obtain the required size. For some fusible materials, the temperature and humidity of the airflow need to be controlled to avoid overheating or agglomeration.
5. Material Feed Rate
The material feed rate will also affect the particle size control of the airflow mill. When the material feed rate is appropriate, it ensures that the material is evenly distributed in the grinding disc, so the size of the particle can be evenly controlled. However, if the feed rate is too large, the material will stay in the grinding disc for a shorter time, resulting in smaller particle sizes. Conversely, if the feed rate is too small, the particle size will be larger.
6. Operator Skills
The last factor is the operator’s skills. An experienced operator can make adjustments according to actual conditions. He/ She can also flexibly manage the above parameters to obtain the ideal particle size.
Conclusion
The main means for jet pulverizers to control material particle size include below factors. They are airflow, classifier, airflow velocity, material properties, grinding disc spacing, blade shape and quantity, material feed rate, and operator skills. In actual applications, it is necessary to make reasonable adjustments according to different material characteristics and size requirements. By doing so, it can improve production efficiency while obtaining the required product particle size.
Controling the exact size of the material is very helpful for you. Epic Powder is a professional manufacturer of all kinds of Jet Mills, Air Classifier Mills and Ball Mills etc., helping you to process various material production line at the lowest cost. If you want to know which jet pulverizer can produce the right size of the material you need, please contact our professional technicians.