Siliceous refractory mortar with excellent high-temperature performance

Abstract

The invention discloses siliceous refractory mortar with excellent high-temperature performance. Powder of the siliceous refractory mortar is prepared by mixing 20-50% of waste silicon brick powder with the particle size of 0.5-0 mm, 15-35% of quartz powder with the particle size of 0.3-0 mm, 25-45% of quartz powder with the particle size of 0.088-0 mm, 1-3% of silicon carbide dust extraction powder, 1-3% of silica micropowder, 1-1.5% of dextrin, 0.1-0.5% of carboxymethyl cellulose, 0.05%-0.2% of a mineralizing agent, and adding water accounting for 27-30 wt% of the powder by mass. The silicondioxide content of the siliceous refractory mortar provided by the invention is greater than or equal to 94%, raw clay, sodium bentonite and the like are not added, the content of aluminum oxide is low, the content of low melt is low, and the refractoriness under load is high. And meanwhile, the waste silicon brick powder is added, so that secondary utilization of resources is realized, and the waste silicon brick powder basically exists in a phosphorus quartz phase, is good in volume stability, is matched with the built silicon brick material, is good in adhesion in a high-temperature use environment, and does not fall off from the surface.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to a siliceous refractory mud with excellent high-temperature performance. Background technique [0002] In the prior art, siliceous refractory mud is mainly used in high-temperature kilns such as various coke ovens and hot blast stoves to build siliceous refractory bricks. For example, in modern coke ovens, the amount of silica bricks used reaches 60-70% of the entire refractory product, so the amount of silica refractory mud used in the process of building silica bricks also reaches 3% of the total amount of silica bricks. -5% or so. The siliceous refractory mud used in coke ovens needs to have a high load softening temperature point, high thermal conductivity, good thermal shock resistance, and high temperature volume stability. In the process of long-term high-temperature use, the poor-quality siliceous mud and silica bricks are not sintered into a whole at high ...

AI Technical Summary

Problems solved by technology

[0004] CN200710062483.8 discloses a kind of siliceous refractory mud powder, adopts waste silica brick powder, silica, clay, collocation each raw material different particle size prepares the siliceous refractory mud that matches with silica brick material; The brick material does not match the problem, but the addition of raw clay, the introduction of alumina impurities, and other low-melting substances have an impact on the softness of the load

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