A kind of siliceous refractory mud with excellent high temperature performance

Abstract

The invention discloses a siliceous refractory mud with excellent high-temperature performance. The powder composition is as follows in terms of mass percentage: waste silica brick powder 0.5-0mm, 20-50%; quartz powder 0.3-0mm, 15-35%; quartz powder 0.088-0mm, 25-45%; silicon carbide dusting powder 1-3%; silica micropowder 1-3%; dextrin 1-1.5%; carboxymethyl cellulose 0.1-0.5%; ~0.2%; mixed with water accounting for 27~30wt% of the powder. The siliceous refractory mud provided by the invention has a silicon dioxide content greater than or equal to 94%, does not add raw clay, sodium bentonite, etc., has low alumina content, low low melt content, and a high load softening temperature point. At the same time, the addition of waste silica brick powder realizes the secondary utilization of resources, and the waste silica brick powder basically exists in the phosphorous quartz phase, which has good volume stability and matches the material of the silica bricks. noodle.

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 various high-temperature kilns such as 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 whole refractory products. Therefore, the amount of siliceous 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 slurry used in coke ovens needs to have a high softening temperature point under load, 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 i...

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

Images