Medium-speed vertical mill for milling petroleum coke

Abstract

The invention relates to a medium-speed vertical mill for milling petroleum coke. The medium-speed vertical mill comprises a milling device including a milling roll assembly and a milling disc assembly, wherein the milling roll assembly comprises a milling roll and a milling roll sleeve, and a lining plate is arranged in the milling disc assembly; the width of the milling roll sleeve is at least increased by 10mm on the original basis, the thickness of the lining plate is at least increased by 20mm, and an wrap angle of the milling roll is at least reduced by 38.45 degrees. Compared with the prior art, the medium-speed vertical mill has the beneficial effects that on the basis of a conventional ZGM medium-speed coal mill, the milling curve is optimized, the milling efficiency is improved, and the service life of the improved complete machine is substantially prolonged; by utilizing a hydraulic variable loading system, a hydraulic oil pipeline system and a rotary separator are optimized, and by arranging a water injector, the operation stability of the medium-speed vertical mill for milling the petroleum coke is guaranteed; the technical scheme can completely meet the milling requirement of the petroleum coke, and indexes of a ground product are that the fineness R90 is less than 1.5% and the moisture Mpc is less than 1%.

Description

technical field [0001] The invention relates to a medium-speed vertical mill, in particular to a medium-speed vertical mill applied to grinding petroleum coke. Background technique [0002] Conventional ZGM medium-speed coal mills are generally used for grinding grindability coefficient HGI=40~100, total moisture Mt=8~40%, product fineness R 90 =2~40% of the material, such as the grinding material is petroleum coke with special properties, because of its grindability coefficient HGI=35~50, moisture Mt=10%, and its product grinding requirements need to reach the fineness R 90 <1.5%, moisture Mpc<1%, the conventional ZGM medium-speed coal mill cannot meet the requirements of use, so the conventional ZGM medium-speed coal mill needs to be technically improved according to the characteristics of petroleum coke to meet its grinding requirements. [0003] The Chinese invention patent with the patent number ZL201110118720.4 discloses a wear-resistant split roller sleeve. The...

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Problems solved by technology

However, this utility model does not have the advantages of a dynamic and static combined rotary separator, and fails to organically combine free vortex and forced vortex, and cannot achieve stable and balanced grading flow field, and is not suitable for medium-speed vertical mills for grinding petroleum coke

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