Dry type air classifier

Abstract

The invention relates to a device used for separating fine powder from powder through air, in particular to a dry type air classifier suitable for classifying non-sticky materials. The dry type air classifier comprises a main machine barrel body. A feed pipe is arranged at the lower part of the main machine barrel body, and a fan opening is formed in one side of the main machine barrel body. The dry type air classifier is characterized in that a skirt type elutriation ring located on the same horizontal line as the fan opening is arranged in the main machine barrel body; a classifying cone is connected to the lower part of the skirt type elutriation ring; a classifying rotor connected with the main machine barrel body is arranged at the upper part of the skirt type elutriation ring; and a fine powder discharging bend installed on the main machine barrel body is arranged on one side of the classifying rotor. The dry type air classifier has the advantages that the classifying range is wide, the classifying accuracy is high, the classifying efficiency is high, the structure is simple and the occupied area is small, is suitable for classifying the non-sticky materials and can carry out dry type classification on various kinds of organic matter and inorganic matter.

Description

(1) Technical field [0001] The invention relates to a device for separating fine powder from powder by air flow, in particular to a dry air classifier suitable for classifying non-stick materials. (2) Background technology [0002] Narrow-grade ultrafine powder is the basis for the preparation of structural and functional materials, and is widely used in fine ceramics, electronic components, high-quality refractory materials, fine chemicals, and cutting-edge defense technologies. Dry air classifier is an important equipment for preparing fine powder. Its working principle is: the air flow enters the volute of the classifier tangentially from two parallel and symmetrical air inlets, and passes through the circularly arranged air guide along the spiral volute. The blades enter the annular area between the outer edge of the drum and the inner edge of the guide vanes. Due to the suction effect of the centrifugal fan, a negative pressure is formed in the middle of the ca...

AI Technical Summary

Problems solved by technology

However, there are many defects in the dry air classifier under the current technology: small classification range, small classification accuracy, low classification efficiency, mostly complex structure, large floor space, hindering the development of enterprises

Images