Jet Mill manufacturers detail the basic concept of air grade machine

The following is the basic concept of the Air Classifier in Jet Mill vendors. 

Airflow classification using air as a medium is also known as dry classification. The material to be treated must be dried, and the moisture content is less than 5 to 6%. Gas classification is dry because it is dry and does not require dehydration in some cases. Some can't use wet or wet treatment, such as talc, aluminum mines, apatite, pulverized coal, kaolin, etc., some chemical, building materials, metallurgical and other raw materials, in dry mill and dry processing, such as Dry magnetic selection, electron elections, wind selection, screening, etc., are often used in Air Classifiers. 

In addition, air separation is usually applied to dust exhaust gas, flue gas and dust removal and dust collection of various gases. Air classifier air classifiers are mainly used for more refined materials. The fractional particle size is 1.5 to 0.005 mm, and the crude material is sieved. The principle of the air classifier is substantially the same as the hydraulic level, and the above settlement theory can also be used for airflow classification. However, in the airflow classification, since the density and viscosity of the air are much smaller than the density and viscosity of water, the same particles are more settled in the air than in the water. 

Moreover, the density and viscosity of the air vary with temperature and pressure. The air classifier is carried out in the moving air flow. In order to cause air flow, wind grading equipment typically requires an appropriate fan (exhaust or blast). When the airflow is classified, the fine particles are usually taken away by the airflow. In some cases, the feedstock is sent to the grading device with the airflow. 

It is well known that the load of solid particles in the air under normal pressure does not exceed 500 g / m3 air. When it reaches 1 kg / m3, the particles fall from the airflow. The load is related to the density and particle size of the particles. When the fine particle material is treated, the load generally does not exceed 200 to 300 g / m3 air. According to this calculation, the volume concentration in the gas stream is much smaller than 0.03. Therefore, when the airflow is classified, in most cases, it belongs to the free settlement. 

The speed required to move the particulate material in the horizontal and vertical directions is relatively large, and the speed required in the horizontal direction is relatively large, and as the particle density increases, for example, for puls with a density of 1.5. Gram / cubic centimeter. The minimum wind speed is 2 m / sec; a powder material having a density of 2.5 g / cm, the speed is not less than 3.5 m / sec; a powder having a density of 4 g / cm 3, a minimum speed of 4 meters per second. 

Due to the complexity of the situation, each particular situationThe appropriate airflow rate under the lower should be determined by experiments. In the rising airflow, the water flow rate required to suspend a certain density and particle size is greater than the calculated value of the free settling, which is due to the uneven distribution of the airflow along the graded chamber portion. The air classifier has the characteristics of high grading range, high grading efficiency, high grading accuracy, accurate cut particle size, and good stability. 

The above is the basic concept of the air classifier in Jet Mill manufacturers. Shandong AlPa Powder Technology Co., Ltd. is a development, manufacturing, and application of various Jet Mill, airflow, pharmaceutical Jet Mill, disc Jet Mill. Private Enterprise.