Air-swept efficient vertical roller mill

Abstract

The invention relates to the field of air-swept efficient vertical roller mill. The air-swept efficient vertical roller mill comprises a mill body; a powder selecting mechanism comprising a stator and a rotor is arranged on the upper part of the mill body; the powder selecting mechanism is connected with a discharge port; the side of the mill body is provided with a feeding pipe at the lower part of the powder selecting mechanism; the lower part of the mill body is provided with a discharge pipe corresponding to the powder selecting mechanism; the lower part of the discharge pipe is provided with a roller mechanism corresponding to the feeding pipe; and the roller mechanism is provided with a blowing device, which is a wind ring arranged on the lateral part of the roller mechanism. The wind ring arranged in the present invention enables the materials entering the feeding tube to be blown upward; and then vortex flow is formed through disturbance on the airflow by the rotor; solid particles with large granularity gather into the center of the airflow and fall down continuously; at the same time, the air bumps against an inner wall of the powder selecting mechanism shell and a guide vane to settle down the solid particles with large granularity. Therefore, the present invention has advantages of high powder selecting efficiency, easily adjustable the particle granularity and small granularity range.

Description

technical field [0001] The invention relates to the field of an air-swept high-efficiency vertical roller mill. Background technique [0002] The vertical roller mill integrates the functions of grinding, drying, classification (powder selection) and conveying, and has the advantages of high efficiency, low energy consumption, low abrasion, high operation rate, compact structure, small site and space occupation, low noise, The fineness of the product is easy to adjust and other obvious advantages, and it is more and more widely used in the grinding and ultrafine grinding of cement (raw meal, coal, clinker), metallurgical slag, materials, chemical industry and other materials. [0003] The current domestic vertical mills have disadvantages such as short service life of the grinding mechanism, low grinding efficiency, difficulty in large-scale, poor airtightness of the feeding system, low powder selection efficiency of the powder selection system, difficult adjustment of parti...

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Problems solved by technology

[0003] The current domestic vertical mills have shortcomings such as short life of the grinding mechanism, low grinding efficiency, difficulty in large-scale, poor airtightness of the feeding system, low powder selection efficiency of the powder selection system, difficult adjustment of particle size, low operating rate and difficult maintenance. Compared with foreign advanced products, the performance of vertical mills is very different, especially for the grinding of high hardness cement clinker and slag, it is difficult for domestic vertical mills to adapt

With the promotion of high-fine and high-mixing technology in recent years, blast furnace slag, which was originally used as waste, is added to cement as cement mixture after ultrafine grinding, which not only turns waste into treasure to realize comprehensive utilization of resources, but also improves the performance of cement , but the iron contained in the slag seriously wears the grinding mechanism of the mill, which affects the service life and operation rate of the mill

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