Single-compartment ball mill type cement vertical mill grinding device

Abstract

The invention discloses a single-compartment ball mill type cement vertical mill grinding device, which is mainly characterized in that: on the basis of the conventional mill consisting of a cement vertical mill and a ball mill, a multi-compartment ball mill is changed into a single-compartment fine grinding ball mill, and a coarse powder circulating device is arranged, wherein the coarse powder circulating device is connected in series between the discharge hole of the cement vertical mill and the feeding hole of the single-compartment fine grinding ball mill. Aggregates with large particles output by the cement vertical mill can be returned to the input end of the cement vertical mill, and enter the vertical mill to be reground, so that outer circulation is formed; coarse materials are prevented from entering the ball mill, the ball mill can be the single-compartment fine grinding ball mill directly, raw materials entering the cement vertical mill have stable flow rate, and problems that the cement vertical mill shocks and the like are solved; and the single-compartment ball mill type cement vertical mill grinding device can further improve the cement grinding efficiency, reduce grinding electricity consumption, easily control the particles of fine powder and ensure good grading of the particles of cement products.

Description

technical field [0001] The invention relates to a device for crushing and grinding blocky cement clinker into finished cement, in particular to a cement grinding device in which a vertical mill with a coarse powder circulation device and a single-chamber ball mill for fine grinding cooperate with each other, belonging to cement Smash fields. Background technique [0002] Traditional cement grinding generally uses a ball mill for grinding. The grinding mechanism is to use large steel balls to crush and coarsely grind materials, and small steel balls to finely grind materials. The average ball diameter decreases from the grinding head to the grinding tail. Generally, there are 2 to 3 chambers. For a 13-meter-long ball mill with 2 chambers, the length of the coarse grinding chamber is 4 meters, and the length of the fine grinding chamber is 9 meters. There is a partition board between the coarse grinding chamber and the fine grinding chamber. , to prevent the coarse grain in t...

AI Technical Summary

Problems solved by technology

Due to structural problems, the roller press is inconvenient to maintain after the rollers are worn out, which affects the operation of the system and is basically eliminated.

Although the cement vertical mill avoids the problems of difficult maintenance and low operating rate of the roller press, it is difficult to control the material layer, the mill is prone to vibration, and the size of the output material is not uniform, so it still needs more than 2 warehouses The long ball mill first coarsely grinds it and then finely grinds it

Therefore, the advantages of the two grinding devices are still not fully utilized, so that the grinding efficiency is still not high, but the power consumption has increased due to the addition of a cement vertical mill.

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