High-temperature grease and preparation method thereof

Abstract

The invention relates to a high-temperature grease and a preparation method thereof, which are widely applied to equipment bearings of production lines in steel mills and steel works. The high-temperature grease contains the following components in weight parts: 45 to 81.5 parts of high-viscosity mineral oil, 4 to 10 parts of polyurea, 10 to 30 parts of high-base number calcium petrolem sulfonate, 1 to 3 parts of transforming agent, 1 to 3 parts of anti-rust agent, 1 to 3 parts of extreme-pressure additive, 0.5 to 1 part of antioxidant, and 1 to 5 parts of thickening agent. The high-viscosity mineral oil is 150BS. The high-temperature grease has higher dropping point, does not turn thin or has lower thinning degree after meeting water; the antirust performance is as good as the new grease after meeting water; and the extreme-pressure performance thereof is reduced by a lower degree or does not reduce after meeting water.

Description

technical field [0001] The invention relates to a high-temperature lubricating grease and a preparation method thereof, which are widely used in equipment bearings of rolling mills and production lines of steelmaking plants. Background technique [0002] Most of the equipment bearings in the production lines of rolling mills and steelmaking plants are lubricated with dry oil, and the working conditions are harsh. The temperature of the steel billet is generally 800-1000 °C, and there is a large amount of cooling water or rolling emulsion to wash away and dust to erode the equipment bearings. [0003] The lubricating greases used in these high-temperature and water-rich parts are generally aluminum-composite greases, lithium-complex greases, and urea-based greases. Due to the limited water resistance of these greases, there are three disadvantages: thinning and loss, bearing rust, and extreme pressure drop. Ordinary extreme pressure grease will be thinned and lost under the...

AI Technical Summary

Problems solved by technology

[0004] These unfavorable conditions such as watery, dusty, and heavy loads have a great impact on the bearings of rolling equipment, and the cost of replacing spare parts is also staggering. Therefore, higher requirements are placed on the performance of the lubricating grease used in the bearings.