Powder grinding aid adding device

Abstract

The invention discloses a powder grinding aid adding device which comprises a hopper, a stock bin and a spiral conveying mechanism. A first feeding port and a first discharging port are formed in the stock bin, and the hopper is connected with the stock bin through the first feeding port. The spiral conveying mechanism comprises a first driving motor and a spiral blade, and the spiral blade is driven by the first driving motor to rotate in the stock bin. The device further comprises a buffering hopper, a buffering stock bin, a double-screw discharging device, an air cannon device and a control system, and the stock bin is connected with the buffering hopper through the first discharging port. The buffering stock bin is arranged at the bottom of the buffering hopper. The air cannon device comprises an air cannon body, an electromagnetic valve, an air cannon controller and a plurality of nozzles. The nozzles are dispersedly arranged in the hopper, the stock bin and the buffering hopper. The powder grinding aid adding device can effectively avoid the adhesion phenomenon of the powder grinding aid on different parts, shutdown maintenance is avoided, discharging is stable, and the performance consistency of cement products is high.

Description

technical field [0001] The invention relates to the technical field of adding powder grinding aids during cement production, in particular to a powder grinding aid adding device. Background technique [0002] Cement grinding aid is a chemical additive that improves the grinding effect and performance of cement. It can significantly increase the output of cement table, the strength of cement of all ages, and improve its fluidity. There are two types of common cement grinding aids, liquid and powder, which can significantly increase the output of the mill, or improve product quality, or reduce the power consumption of grinding. Therefore, the proportion of cement grinding aids directly affects the effect and performance of cement grinding. At present, the powder grinding aid is usually added into the silo through the hopper, and the powder grinding aid is forced to be pushed to the discharge port under the silo by driving the screw conveying mechanism in the silo, and the pow...

AI Technical Summary

Problems solved by technology

Although the screw conveying mechanism has the effect of forced pushing, because the powder grinding aid is usually sticky, it is easy to stick to the hopper, silo, screw conveying mechanism and the discharge port, which may lead to shutdown and production in severe cases, and the powder The degree of adhesion of the powder grinding aid to different parts is not constant, which leads to the fact that even if the silo is full of powder grinding aid and the speed of the screw conveying mechanism is inconvenient, the weight of the powder grinding aid passing through the outlet The weight range of the powder grinding aid added to the mill fluctuates greatly, which can easily cause the performance of the same batch of cement products to be greatly different; in addition, when the powder grinding aid storage in the hopper and the silo are different , will also cause different bulk densities, and it cannot be guaranteed that the silo is always filled with powder grinding aids, which also leads to different weights of powder grinding aids passing through the discharge port, and the weight range of powder grinding aids added to the mill fluctuates greatly

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