Separator with wide particle size distribution

Abstract

The invention provides a powder classifier with wide particle size distribution. It includes shell, cage rotor, spreading plate, central air pipe and coarse powder cone; The tuyere and feed port; the coarse powder cone is arranged under the cage rotor; the semi-annular collecting hopper of the secondary separation device is arranged on the upper part of the coarse powder cone, and the lower port of the collecting hopper passes through the first air lock valve and the four The upper port of the four-way joint is connected, the two side ports of the four-way joint are respectively connected with the separator and the secondary air, and the lower port is connected with the second air lock valve; the upper port of the separator is connected with the air outlet pipe, and the separator's The lower port communicates with the overflow bin through the second air lock valve. The invention can sort out the fine powder, finer powder and coarser powder required by the cement with wide particle size distribution at one time, improves the particle distribution of the selected powder, reduces the water demand of cement, and improves the relationship between cement and external cement. The compatibility of the agent, as well as the working performance of the cement, and can reduce energy consumption and production costs.

Description

technical field [0001] The invention relates to a powder selecting device, in particular to a powder selecting machine with wide particle size distribution suitable for cement circular flow grinding. Background technique [0002] At present, ball mills are generally used for cement grinding, which can be divided into open flow type and circular flow type according to the production process. The open-flow mill is to mix the clinker and the admixture in proportion, and then grind them together. The powder after grinding can be directly used in cement production without powder selection; however, the open-flow mill has high energy consumption and low output. The production cost is high and has been phased out. The circular flow mill is widely used in the grinding system because of its low energy consumption, high system output, which is conducive to large-scale and improvement of labor productivity per capita; however, the powder after the circular flow mill needs to be select...

AI Technical Summary

Problems solved by technology

In recent years, with the development of high-efficiency powder separator technology, the separation accuracy of powder separator is getting higher and higher, the particle distribution of cement is getting narrower and narrower, the proportion of mixed materials is low, and the water demand of cement is too large. The compatibility of the cement is poor, and the working performance of the cement is reduced

In order to change the particle size distribution of cement and improve the working performance of cement, some factories are forced to change the circular flow grinding system into an open flow grinding system, but the open flow grinding is different from the circular flow grinding in terms of energy consumption and large scale. Incomparable; there are also some manufacturers that first grind part of the mixed material separately to produce some powders with coarser particle sizes, and then add these coarser mixed material powders to the cement produced by circulating powder , so as to change the particle distribution of cement. Although this is very effective in changing the particle distribution of cement, it also makes the cement grinding system very complicated and greatly increases the investment.

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