a vertical mill

Abstract

The invention discloses a vertical grinding machine, which comprises a casing, wherein a tube body is arranged in the casing, a rotating shaft is arranged in an inner cavity of the tube body; a discharging pipe, a centrifugal disc and a grinding blade are sequentially arranged outside the rotating shaft from top to bottom; a first grinding cavity is arranged between the outer wall of the lower section of the rotating shaft and the inner wall of the tube body; a second grinding cavity is formed between the outer wall of the tube body and the inner wall of the casing; a stirring rod is arrangedin the second grinding cavity; a material guide opening is formed between the top surface of the tube body and the bottom surface of the centrifugal disc and is used for communicating the first grinding cavity and the second grinding cavity; a material discharging passage is arranged between the outer wall of the centrifugal disc and the inner wall of the casing and the material discharging passage is communicated with the second grinding cavity; a groove communicated with the discharging passage is formed in the upper surface of the centrifugal disc and surrounds the outer periphery of the rotating shaft; a material guide passage is arranged between the inner wall of the discharging pipe and the outer wall of the upper section of the rotating shaft; the lower side of the material guide passage is communicated with the groove; the upper side of the material guide passage is communicated with the outside. The material grinding path can be effectively prolonged; the normal material discharging of the ground material can be ensured.

Description

technical field [0001] The present invention relates to the field of construction machinery, more specifically, to a vertical mill. Background technique [0002] The mill is the key equipment for crushing the material after it is crushed. The mill can be widely used in cement, silicate products, new building materials, refractory materials, chemical fertilizers, non-ferrous metal beneficiation, glass ceramics and other production industries, and can perform dry or wet grinding of various ores and other grindable materials , therefore, mills have been widely used in various industries. Existing mills generally include vertical mills or horizontal mills, among which vertical mills are popular among users because of their small footprint. [0003] A vertical mill generally includes a feeding mechanism, a grinding mechanism, a discharging mechanism, and a driving mechanism. Among them, the grinding mechanism is the main mechanism of the vertical mill, and the design of the gri...

AI Technical Summary

Problems solved by technology

In actual operation, due to the limited height design of the factory building, the overall height of the vertical mill cannot be too high, and the height design of the grinding mechanism is also limited. In this way, the grinding path of the material in the grinding mechanism is very limited, and the material is often not fully obtained. The grinding of the material causes the production quality of the material to fail to meet the specified size requirements; in addition, in order to ensure that the final grinding particle size of the material meets the specified requirements, the conventional vertical mill is generally designed with a screen at the discharge mechanism, and the material that does not meet the specified particle size It is intercepted on the screen and continues to grind, and the materials that are ground to meet the specified particle size can fall through the fine holes of the screen and be collected for use. At the same time, the material is often mixed with grinding medium balls, and the material and grinding medium balls tend to accumulate and squeeze on the screen due to the action of gravity. In this way, it is easy to cause the screen to be blocked, which greatly affects the Normal discharge of materials

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