Screening device in super-fine grinding mill

Abstract

A screening device in a super-fine grinding mill comprises a barrel body and a bracket in the barrel body, wherein a bracket bottom plate is arranged at the periphery of the bracket; a front chamber and a rear chamber in the super-fine grinding mill are arranged on the left side and the right side of the bracket respectively; a front screen plate and a rear screen plate are connected with the left side and the right side of the bracket respectively; a front grate plate is connected with the left side of the front screen plate; a boss projecting out of the right side surface is arranged on the right side surface of the front grate plate; a screening chamber is formed between the right side surface of the front grate plate and the left side surface of the front screen plate; the top end of the boss props against the left side surface of the front screen plate. According to the screening device, a conventional cement grinding mill cabin baffle and a blind plate in the screening device are replaced with a rear grate plate, a ventilation area in the mill is enlarged, a smooth ventilation effect is achieved, powder can timely enter a rear cabin for grinding through the screening device from a front cabin, the excessive grinding and cushion effects of the front cabin are reduced, the grinding capability of a grinding cabin is improved, and the operation hour of the grinding mill is prolonged.

Description

technical field [0001] The invention relates to the field of high-fine grinding, in particular to an in-mill screening device for high-fine grinding. Background technique [0002] High-fine grinding is a kind of grinding, but it can be processed and ground to produce a finer grinding than ordinary grinding. High-fine mills are generally composed of mills, cylinders, inlets, outlets, compartment plates, grinding bodies and other components. [0003] At present, many industries have higher and higher requirements for the fineness of powder materials. For example, the raw material powder of petroleum proppant (ceramic sand) requires less than 1% of the 325 mesh sieve. It is difficult to guarantee the fineness of aluminum stone powder with traditional tube mills. And the mill output is low. The reason is that most of the mill manufacturers are designed and manufactured according to the requirements of the cement industry for grinding raw materials or cement, and the fineness o...

AI Technical Summary

Problems solved by technology

[0004] Its main disadvantages are: poor ventilation, wide slits, large particles enter the rear chamber through the slits, especially when entering the grinding chamber, they cannot be crushed by the grinding body, resulting in the accumulation of particles in the rear chamber, reducing the grinding efficiency, resulting in low output and fine grains. thicker

Especially for the grinding of aluminum ore, its grindability is worse, the output is lower, and the fineness is not easy to guarantee

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