Permanently-stable heat insulating brick for limekiln

Abstract

The invention relates to a permanently-stable heat insulating brick for a limekiln. The heat insulating brick comprises, by mass, 20-30 parts of flint clay, 20-30 parts of ceramsite, 5-10 parts of clay, 10-15 parts of floating beads and 20-30 parts of Portland cement; a mass part ratio of flint clay with the particle size being less than 1 mm to flint clay with the particle size being 3-5 mm is 1:1; and a mass part ratio of ceramsite with the particle size being less than 1 mm to ceramsite with the particle size being 1- 3 mm and ceramsite with the particle size being 3-8mm is 1:2:3. The permanently-stable heat insulating brick has the advantages of high refractoriness, high strength and high heat insulating performance, can be used to replace clay bricks and a heat insulation layer which are outside a limekiln working layer high aluminum bricks, forms a permanent layer and a heat insulating layer through one-time masonry, is simple to use, and is permanently stable.

Description

technical field [0001] The invention relates to the technical field of refractory materials, in particular to a permanently stable heat-insulating brick for a lime kiln. Background technique [0002] Lime kiln, vertical furnace body, continuous feeding, used to calcine limestone, make limestone decompose into quicklime CaO and carbon dioxide CO under high temperature conditions 2 The kiln lining is generally divided into four layers, including the working layer, permanent layer, heat insulation layer and shell steel plate in sequence from the inside to the outside. Because there is no brick product that can satisfy both refractory and thermal insulation properties in the prior art , so the masonry of the permanent layer and the insulation layer needs to be carried out step by step. Usually, clay bricks are used as the permanent layer and an insulation layer is added. The masonry process is relatively complicated. Contents of the invention [0003] In order to solve the ab...

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Problems solved by technology

[0002] Lime kiln, vertical furnace body, continuous feeding, used to calcine limestone, make limestone decompose into quicklime CaO and carbon dioxide CO under high temperature conditions 2 The kiln lining is generally divided into four layers, including the working layer, permanent layer, heat insulation layer and shell steel plate in sequence from the inside to the outside. Because there is no brick product that can satisfy both refractory and thermal insulation properties in the prior art , so the masonry of the permanent layer and the insulation layer needs to be carried out step by step. Usually, clay bricks are used as the permanent layer and an insulation layer is added. The masonry process is relatively complicated.

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