Vertical Roller Mill Requirements Types Of MaterialDate:2019-04-02

Summary:Extensive already vertical roller grinding applications is known to all, the vertical roller grinding machine suitable for application specific properties of ma

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Extensive already vertical roller grinding applications is known to all, the vertical roller grinding machine suitable for application specific properties of materials are rarely known, entering the mill the material from the species ratio, feed particle size and material moisture on which has a more detailed explanation?

vertical roller mill material types and with the requirements of the proportion

In grinding the species and ratio is directly related to the mill yield power (kwh/t), output and quality of mill. At the same time grinding fineness, clinker in rotary kiln, mill output fell 20% than grinding shaft kiln clinker. In the mixed material, slag is the most difficult to grinding, sieve residue cement products for slag; fly ash and coal gangue as well worn more, a fly without grinding directly into a product.

The latest research suggests: any mixed materials will decrease the strength of the cement mixed material, only the activity of different, its decline of cement strength degree of different. Common mixed material, the activity of slag is the highest, but the assumption that the slag surface area in the range of 300-450m2/kg, its influence on cement strength are almost the same.

requirements for grinding vertical roller mill stone size

Planning needs grinding technology is feeding size D 25mm planning. When feeding size D = 2-25mm, the conversion formula for mill experience value: Qb=Qa (Da/Db) x, which represents the value of D: Q, on behalf of the grinding material particle size, ratio of X = 0.1-0.145. Assuming that add some pre grinding equipment, such as vertical shaft crusher, roller press, vertical mill (CKP), Jane roller grinding, fine crusher, mill station output will significantly advance. Of course, the grinding material particle size decreases, the grinding uniformity coefficient of material are reduced, gradation of grinding body must also change.

The crusher hammer wear after feeding size becomes coarse, so will affect production function, and then affect the quality of output and cement products of the mill. Recommended before grinding add screen.

material selection should pay attention to moisture

Cement fineness the thinner, more sensitive to moisture, moisture differences demand will paste paste grinding ball. Generally, the grinding material of comprehensive water each added 1%, vertical roller grinding machine output will decline 10%. When the moisture content is greater than 5%, simply stop grinding mill.

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