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Cement external-circulation vertical milling preparation system capable of adjusting particle size distribution

A particle size distribution and preparation system technology, applied in cement production, etc., can solve problems such as short waiting time, narrow range of cement particle size distribution, and difficulty in over-grinding, so as to achieve low power consumption and good grinding performance. The effect of cement properties

Active Publication Date: 2015-01-07
NANJING KISEN INT ENG
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Problems solved by technology

In the final grinding system of the external circulation vertical mill, since the fine powder after grinding is directly selected by the powder separator, the material stays in the external circulation vertical mill for a very short time, and it is difficult for overgrinding to occur, resulting in the selected cement particles The particle size distribution range is narrow

Method used

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  • Cement external-circulation vertical milling preparation system capable of adjusting particle size distribution
  • Cement external-circulation vertical milling preparation system capable of adjusting particle size distribution
  • Cement external-circulation vertical milling preparation system capable of adjusting particle size distribution

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Embodiment approach

[0027] Another embodiment of the improvement of the present invention, such as figure 2 , the cement product A collected by the first dust collector 3-3 and the cement product B collected by the second dust collector 4-3 are mixed together in different proportions to obtain mixed cement with different particle size distribution ranges. Mix in any ratio.

[0028] Another improved embodiment of the present invention, such as image 3 , the material behind the bucket elevator 2 is divided into two paths, the first path directly returns to the vertical mill 1, and the second path enters the various cement powder separation subsystems connected in parallel after the bucket elevator 2, and the material amount of the first path is controlled at 0-30% , to realize that a small part of the powder containing the fine powder of the finished cement product is returned to the vertical mill 1 for cyclic grinding, which is helpful for the stable operation of the vertical mill, and can also...

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Abstract

The invention relates to a cement external-circulation vertical milling preparation system capable of adjusting particle size distribution. The cement external-circulation vertical milling preparation system comprises a vertical mill, a bucket elevator and a cement powder separator, wherein the cement powder separator comprises two sets and more of powder separating subsystems which are connected in parallel and arranged behind the bucket elevator, wherein each powder separating subsystem comprises a V-shaped powder separating machine, a fine powder separating machine, a dust collector and a fan which are sequentially connected in series. Cement raw materials are milled by virtue of the vertical mill and fed into two sets and more of powder separating subsystems by virtue of the bucket elevator, cement with different particle size distributions is separated by virtue of multiple sets of powder separating subsystems connected in parallel and then cement separated in multiple paths is warehoused separately or in a mixed way and thus the cement products with different particle size distributions can be obtained.

Description

technical field [0001] The invention relates to a cement external circulation vertical mill preparation system with adjustable particle size distribution, which can obtain cement products with wider particle size distribution and cement products with different particle size distribution ranges. Background technique [0002] In the field of cement grinding, tube mills are gradually replaced by efficient grinding equipment in terms of energy-saving grinding due to their low energy utilization and grinding efficiency. Vertical mill is a material layer grinding equipment with high grinding efficiency. The vertical grinding final grinding system has been widely used in the cement raw meal grinding and pulverized coal preparation, and there are also many cases in the cement grinding. In the past, people were worried that the cement prepared by the vertical grinding final grinding system had high water requirement and morphology. The unfavorable properties such as low sphericity a...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/52
CPCY02P40/10
Inventor 康宇钟根李安平
Owner NANJING KISEN INT ENG
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