Composite suspending agent for producing roller sleeve and disc lining of vertical mill

Abstract

The invention relates to a composite suspending agent for producing a roller sleeve and a disc lining of a vertical mill, in particular to a composite suspending agent for producing a roller sleeve and a disc lining of a vertical mill, which bear plough wear accompanied with impact, deformation fatigue wear and brittle fracture. The composite suspending agent comprises the following components in percentage by mass: 0.10 to 0.60 percent of RESiFe, 0.05 to 0.40 percent of NbFe, 0.05 to 0.40 percent of VFe, 0.05 to 0.40 percent of TiFe, 0.05 to 0.20 percent of BFe, 0.20 to 1.00 percent of Cr20Mo iron shot and the balance of Fe. The straight runner is positioned at the bottom of the suspending cup. Due to the cooling, instantaneous inoculation and deterioration effects of the suspending agent, the whole cross section structure of a roller sleeve casting is refined, impurities tend to be distributed spherically, and density is increased, so that mechanical property and wear resistance are improved.

Description

technical field [0001] The present invention relates to a composite suspending agent for producing roller sleeves and disc linings of vertical mills, more specifically, relates to a vertical mill roller sleeve and disc linings that withstand plowing wear accompanied by impact, deformation fatigue wear and brittle fracture compound suspending agent. Background technique [0002] In industries such as cement and electric power, large-scale high-efficiency and energy-saving vertical roller mills are increasingly widely used. As the core components and main wearing parts of the roller sleeve and disk lining, their service life directly affects the production efficiency of the vertical mill. The vertical mill adopts the principle of material bed grinding to grind materials. Its working principle is that the relative movement between the disc lining and the roller sleeve caused by the rotation of the disc lining results in continuous rolling of the material. When the roller slee...

AI Technical Summary

Problems solved by technology

At present, the service life of high chromium molybdenum cast iron roller sleeves and disc linings at home and abroad is generally about 7000h, while the maintenance cycle of cement production lines is generally 8000h, so when the maintenance period is not full, the vertical mill roller sleeves and disc linings must be replaced. This will result in hundreds of thousands of lost production

Therefore, the roller sleeves and disk linings currently produced are far from meeting the requirements of cement production plants for their service life.

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