Decompression classifier

Abstract

The invention discloses a decompression classifier used for powder processing. The decompression classifier comprises a classification shell, a classification impeller, a powder discharging chamber and a principal shaft; the internal space of the classification shell is a classification chamber, the position above the classification chamber is the powder discharging chamber, and the powder discharging chamber is provided with a powder discharging port; the classification impeller is located in the classification chamber and fixedly mounted on the lower part of the principal shaft, an upper layer steel plate of the classification impeller is a narrow-sided flange, a sealed tank being adaptive to the flange is arranged on the lower end face of the powder discharging chamber, and two or moredecompression holes which are uniformly distributed along the circumference are formed in the sealed tank; and decompression holes are communicated with a circular air channel, and the circular air channel is communicated with the atmosphere through an air filter. The decompression classifier can meet the requirement for ultra-fine accurate classification, and is high in classification efficiency,low in unit energy consumption, stable in machine performance and long in service life, the size range of the particles capable of being processed by the decompression classifier is between 400 and 1250 meshes, the decompression classifier is very convenient to use and maintain, speed control can be conducted very conveniently as well, the problem of over-grinding of powder is thoroughly solved,and the distribution range of the particle size of finished products is narrow.

Description

technical field [0001] The invention relates to powder processing equipment, in particular to a decompression classifier. Background technique [0002] The classifier is the key component to ensure the fineness of the product in the pendulum mill. The traditional mill adopts a single-layer axial flow fan type straight blade classifier. The range of particle size that can be processed by this traditional mill is limited to 80~ 325 mesh coarse and fine powder; if a turbine classifier is used, due to the large gap and short path between the lower end surface of the powder outlet sealing groove and the upper end surface of the classifying impeller, it is easy to cause leakage of large dust particles. If you want to produce a finer powder, then It is necessary to increase the rotating speed, which will easily cause the powder to be over-grinded, and it is impossible to achieve ultra-fine and accurate classification. Contents of the invention [0003] The purpose of the present...

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Problems solved by technology

[0002] The classifier is the key component to ensure the fineness of the product in the pendulum mill. The traditional mill adopts a single-layer axial flow fan type straight blade classifier. The range of particle size that can be processed by this traditional mill is limited to 80~ 325 mesh coarse and fine powder; if a turbine classifier is used, due to the large gap and short path between the lower end surface of the powder outlet sealing groove and the upper end surface of the classifying impeller, it is easy to cause leakage of large dust particles. If you want to produce a finer powder, then It is necessary to increase the speed, which can easily cause the powder to be over-grinded, and it is impossible to achieve ultra-fine and accurate classification

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