Refractory brick with low coefficient of linear expansion and preparation method thereof
A technology of linear expansion coefficient and refractory bricks, which is applied in the field of low linear expansion coefficient refractory bricks and its preparation, can solve the problems of low refractoriness and large linear expansion coefficient of refractory bricks, and achieve improved refractoriness, low volume expansion, and excellent comprehensive performance effect
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[0015] A low linear expansion coefficient refractory brick, made of the following raw materials by weight (kg): white cement 51, desulfurized petroleum coke slag 20, granite pegmatite tailings 37, maleic anhydride-acrylic acid copolymer 6, aluminum titanate 12. Asbestos tailings 32. Foundry waste sand 18. Yellow phosphorus slag 25. Lithium silicate 8. Lithium feldspar 18. Crystal stone waste 23. Boiler ash 19. Alginate triethanolamine salt 8.
[0016] A method for preparing refractory bricks with a low coefficient of linear expansion, comprising the following steps:
[0017] (1) Mix granite pegmatite tailings, asbestos tailings, yellow phosphorus slag, crystal stone waste, and boiler ash evenly, crush them, pass through a 120-mesh sieve, calcinate at 810°C for 2.5h, cool to room temperature, and dry at 600r / min Ball mill for 25 minutes, then add the ball-milled powder into a sulfuric acid solution with a mass fraction of 25% according to the solid-to-liquid ratio of 1:4, heat ...
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