| 摘要 |
An improvement to the conventional grinding mill and separator designs which facilitates the use of larger diameter grinding surfaces and additional numbers of grinding rollers by equalizing the gas velocity around the grinding rollers and journal with the gas velocity employed to fluidize the feed particulate material. A plurality of peripheral vertical static separators are located about the grinding chamber and above the grinding rollers to provide an increase in the cross-sectional area of the grinding mill vertical shaft, thereby reducing the gas velocity around the grinding rollers and journal. The peripheral vertical static separators are configured with a trapezoidal sectional area, such that oversize particulate material falling into the peripheral vertical static separators is redirected into the grinding chamber, resulting in an increase in the number of grinding chamber material introduction points. Centrifugal action of the grinding journal ejects oversize particulate material directly into the peripheral vertical static separators before it reaches the separator chamber, thereby functioning as a first stage separator and permitting the separator chamber to be run at a slower speed, reducing overall power consumption.
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