External-circulation cement finish grinding system for vertical mill

Abstract

The invention discloses an external-circulation cement finish grinding system for a vertical mill. The external-circulation cement finish grinding system comprises a belt conveyor, a bucket elevator, a steady current bin, a vertical mill, a dust collector, a fan and a chute, wherein the belt conveyor is used for conveying materials inside, and the chute is used for conveying fine powder finished products outside. The external-circulation cement finish grinding system is characterized in that the bucket elevator, a coarse powder concentrator, the steady current bin and the vertical mill are sequentially connected to form a circulating system; the bucket elevator, the coarse powder concentrator, a refined powder concentrator, the steady current bin and the vertical mill are sequentially connected to form a circulating system; the bucket elevator, the coarse powder concentrator, the refined powder concentrator, the dust collector and the fan are sequentially connected; a powder concentration device is positioned outside the vertical mill and is formed by serially connecting the coarse powder concentrator and the refined powder concentrator; the coarse powder concentrator comprises three paths of air inlet pipelines which are connected in parallel, one path is connected with a heat source, one path is connected with cold air, and one path is connected with a dust collecting air inlet of the vertical mill.

Description

technical field [0001] The invention relates to a cement grinding system, in particular to an external circulation cement vertical mill final grinding system. 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. The vertical mill is a kind of material bed grinding equipment with high grinding efficiency. The vertical mill final grinding system has been widely used in cement raw material grinding and coal powder preparation, and there are many cases in cement grinding. In the past, people worried that the cement prepared by the vertical mill final grinding system needs high water content and poor appearance. Unfavorable properties such as low sphericity and too concentrated particle distribution have been gradually overturned by the practice of cement workers. The cement ground by the vertical mill final g...

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Problems solved by technology

When the powder separator is directly removed from the vertical mill and replaced by other powder separators to select powder outside the mill and collect finished products, the vertical mill also loses the function of hot air drying. When, this kind of vertical mill is difficult to adapt to

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