Submerged arc furnace flue vacuum insulation pipe with compound fireproof pouring material layer

Abstract

The invention provides a submerged arc furnace flue vacuum insulation pipe with a compound fireproof pouring material layer. The vacuum insulation pipe comprises a steel pipe main body, wherein a vacuum cavity and a pouring material containing cavity are formed in the pipe wall of the steel pipe main body; the shape of the vacuum cavity and the pouring material containing cavity is corresponding to the shape of the steel pipe main body; the vacuum cavity and the pouring material containing cavity are coaxial. The pouring material containing cavity is filled with the compound refractory pouring material which is uniformly stirred after adding water. The compound refractory pouring material is made of the following components in parts by weight: 10-15 parts of corundum, 10-15 parts of mullite, 10-15 parts of silicon carbide, 5-10 parts of silica fume, 15-20 parts of magnesite, 10-15 parts of graphite, 10-15 parts of alumina micro powder, 2-10 parts of phenolic resin, and 3-10 parts of carbon nano tube; permeation holes are formed on the inner pipe wall of the steel pipe main body; the permeation holes are communicated with the pouring material containing cavity; thus, the compound refractory pouring material can be permeated from the permeation holes, and the compound fireproof pouring material layer is formed.

Description

technical field [0001] The invention relates to the technical field of pipe insulation, in particular to a vacuum insulation pipe for flue gas of a submerged arc furnace with a composite refractory castable layer. Background technique [0002] Existing flue gas insulation pipelines of submerged arc furnaces mostly use simple insulation materials for pipeline insulation. Because the insulation materials do not have strength, the pipelines will be sucked flat during long-term operation; at the same time, due to the falling off of insulation materials, the reduction The temperature of the flue gas is lowered, so that the power generation efficiency of the waste heat of the flue gas is significantly reduced. Contents of the invention [0003] In view of this, it is necessary to provide a submerged arc furnace flue gas vacuum insulation pipe with a composite refractory castable layer that has a good thermal insulation effect and a long service life. [0004] A submerged arc fu...

AI Technical Summary

Problems solved by technology

[0002] Existing flue gas insulation pipelines of submerged arc furnaces mostly use simple insulation materials for pipeline insulation. Because the insulation materials do not have strength, the pipelines will be sucked flat during long-term operation; at the same time, due to the falling off of insulation materials, the reduction lower flue gas temperature, the efficiency of flue gas waste heat power generation is significantly reduced

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