Coarse fraction powder concentrator

Abstract

The invention relates to a coarse fraction powder concentrator which comprises an engine base, a bearing block, a transmission wheel, a hollow spindle, a spreading disk, a large fan blade, an inner shell and an outer shell, wherein the bearing block is arranged on an engine cover; the hollow spindle is arranged on the bearing block through a bearing, and a material inlet is arranged above the hollow spindle; the transmission wheel, the spreading disk and the large fan blade are assembled on the hollow spindle to form a rotor component capable of rotating; the outer shell consists of an upper outer shell and a lower outer shell; the engine base is arranged outside the outer shell; the lower part of the lower outer shell is provided with a fine powder outlet; the inner shell is arranged in an inner cavity formed by the outer shell and consists of an upper inner shell and a lower inner shell; the lower part of the lower inner shell is provided with a coarse powder outlet; and air return blades are arranged between the upper inner shell and the lower inner shell. The invention has the advantages of simple structure, high efficiency, large treatment capacity, long service life and no need of an external fan.

Description

technical field [0001] The invention relates to a dry separation device for powdery materials, in particular to a dry separation device for coarse-grained powdery materials used in industries such as non-metallic ores and new materials. Background technique [0002] The dry powder separators commonly used in the industry mainly include centrifugal, cyclone, and rotor types. , Coarse materials fall into the coarse powder area due to the action of gravity and centrifugal force, and the downward force is greater than the upward force, while the fine powder continues to enter the fine powder area. Since these powder separators adjust the fineness of the finished powder by changing the number of small fan blades and the speed of the classification impeller, the separation of coarse and fine powders must be performed with a larger classification height. [0003] Theoretically, powder separators generally rely on wind to overcome gravity to lift the materials and then sort and cla...

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Problems solved by technology

[0003] Theoretically speaking, general powder classifiers rely on wind force to overcome gravity to lift materials and classify and classify them. Since the wind-receiving area of ​​materials is proportional to the square of the particle size, and the weight is proportional to the cube of the particle size of the materials, it is large Granular materials and materials with large specific gravity are not easy to be lifted, sorted and classified

If the material separation particle size is large, as the particle size increases, the increase in gravity is much greater t

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