Hexagonal boron nitride base slide plate lubricant and preparation method thereof

Abstract

The invention discloses a hexagonal boron nitride base slide plate lubricant and a preparation method thereof. The hexagonal boron nitride base slide plate lubricant comprises the following components in parts by weight: 20 to 50 parts of hexagonal boron nitride powder, 1 to 4 parts of carbon black, 0.5 to 2 parts of bentonite, 2 to 5 parts of alpha-high temperature alumina powder, 3 to 9 parts of silica sol, 1 to 3 parts of white emulsion, 1 to 5 parts of carboxymethylcellulose sodium, 0.1 to 0.5 part of tween, 0.5 to 1.5 parts of glycol, and 0.1 to 0.5 parts of antiseptic, the balance being water. The preparation method of the hexagonal boron nitride base slide plate lubricant comprises the following technology steps: (1) adding silica sol, white emulsion, carboxymethylcellulose sodium, tween, glycol, antiseptic and water into a high-speed mixer so as to obtain a pre-prepared solution; (2) then adding hexagonal boron nitride powder, carbon black, bentonite, and alpha-high temperature alumina powder into the pre-prepared solution, and stirring so as to obtain the hexagonal boron nitride base slide plate lubricant.

Description

technical field [0001] The invention relates to a sliding board lubricant for a sliding nozzle, in particular to a water-based lubricant capable of improving the surface lubrication and high-temperature oxidation resistance of a sliding board, and belongs to the field of lubricants. Background technique [0002] The sliding nozzle is a set of devices installed at the bottom of the ladle (or tundish) to control the flow of molten steel, including the upper and lower nozzle bricks and the upper and lower sliding plates. The combined flow control system of the brick makes the operation of the steel pouring process simple, safe, reliable, accurate flow control, faster ladle turnover, and reduces the consumption of refractory materials. [0003] In the sliding nozzle system, the slide plate is the most critical part, which is determined by its special use conditions. Specifically: (1) It needs to be in contact with high-temperature molten steel for a long time; (2) Under the con...

AI Technical Summary

Problems solved by technology

[0004]At present, graphite powder is the main raw material of skateboard lubricants used in China. Although graphite has a very high melting point (>3000°C) and excellent lubricating properties, Its biggest disadvantage is its poor resistance to high temperature oxidation. In the air, when the temperature exceeds 400°C, obvious oxidation will occur, which will lead to a sharp consumption of the graphite lubricating coating on the surface of the slide.