Cement external circulation vertical mill combined high-performance grinding process system

Abstract

The invention discloses a cement external circulation vertical mill combined high-performance grinding process system, which comprises an external circulation vertical mill, a combined powder concentrator, a cyclone dust collector, a first conveying chute, a dry stirring mill, a second conveying chute, a fine powder blending bin, a coarse powder blending bin and a mixer. The external circulation vertical mill and combined powder concentrator are connected end to end, an upper discharge port of the combined powder concentrator is connected with the cyclone dust collector; a discharge port of the cyclone dust collector is connected with the first conveying chute; an outlet of the first conveying chute is divided into two paths, one path is connected with the dry stirring mill, and the other path is connected with the coarse powder blending bin; a discharge hole of the dry stirring mill is connected with the second conveying chute; an outlet of the second conveying chute is connected with the fine powder blending bin; and outlets of the fine powder blending bin and the coarse powder blending bin are connected with the mixer. The advantages of coarse grinding of the external circulation vertical mill and fine grinding of the stirring mill in the aspects of process and energy consumption are exerted, the fine powder energy consumption of the external circulation vertical mill is reduced, the particle size distribution of the final product can be flexibly adjusted according to the ratio of coarse powder to fine powder, and the cement performance is improved.

Description

technical field [0001] The invention relates to the technical field of grinding technology, in particular to a cement external circulation vertical mill combined with high-performance grinding technology system. Background technique [0002] Cement grinding is to grind clinker, gypsum, slag and other mixed materials to obtain cement products that meet the performance requirements. The current cement grinding process system mainly includes: ball mill final grinding system, roller press final grinding system, roller press ball mill combined grinding system, vertical roller mill final grinding system, etc. Judging from the performance of cement products of different grinding processes, the quality of cement produced by the final grinding system of the ball mill is the best, with wide particle gradation, high particle sphericity, low water demand, moderate hydration rate, and better strength development. , but the content of fine particles is high, and the energy utilization ra...

AI Technical Summary

Problems solved by technology

[0004](1) The particle size distribution of the product cannot be adjusted manually, and there is no measure to adjust the cement performance;

[0005](2) The ideal cement product performance and low grinding energy consumption cannot be taken into account at the same time;

[0006](3) The existing cement grinding equipment is mainly suitable for fine grinding, not for ultra-fine grinding, and the energy consumption is relatively high when producing finer-grained products Large, in order to ensure the fine-grained content in the product, it often consumes a huge amount of energy

[0009](1) In the existing dry stirring mill, the degree of collision motion between the material and the grinding medium is weak, the grinding effect is poor, and the grinding efficiency is low;

[0010](2) In the existing dry stirring mill, when the qualified material is separated from the grinding medium after grinding, the separation effect is poor, and the qualified product cannot be discharged in time, resulting in partial material overfilling. Severe grinding also reduces the stability of the equipment and limits the size of the equipment;

[0011](3) The existing dry stirring mill generates a lot of heat during the grinding process, and there are safety hazards such as high temperature burns and dust explosions, lack of heat dissipation measures, and poor equipment reliability

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