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A kind of low thermal conductivity heat insulation brick and preparation method thereof

A technology of low thermal conductivity and thermal insulation bricks, applied in the field of refractory materials, can solve the problems of short service life, large thermal conductivity and high self-weight of anti-peeling high-alumina bricks, achieve thermal insulation effect and excellent service life, and reduce the self-weight of equipment. Effect

Active Publication Date: 2018-04-20
郑州瑞泰耐火科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In order to solve the problems of existing high-strength alkali-resistant bricks and anti-flaking high-alumina bricks with short service life, high self-weight and large thermal conductivity, the purpose of the present invention is to provide a low thermal conductivity heat insulation brick and its preparation method

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  • A kind of low thermal conductivity heat insulation brick and preparation method thereof

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Embodiment 1

[0014] A low heat conduction heat insulation brick, its raw material compatibility is as follows: it is composed of a working layer and a heat insulation layer, the work layer and the heat insulation layer are bonded with a low heat conduction high temperature adhesive, and the heat insulation layer is a normal temperature compressive strength ≥ 0.5MPa Nano-microporous heat insulation board, the working layer is made of aggregate, powder, nano-powder, high-temperature reinforcing agent plus binder, the sum of aggregate, powder, nano-powder, and high-temperature reinforcing agent is 100wt%, and the binder Accounting for 4wt% of the sum of aggregate, powder, nanopowder, and high-temperature reinforcing agent; the aggregate is: 15wt% of high-alumina aggregate with a particle size of 0-1mm, 30wt% of high-alumina aggregate with a particle size of 1-3mm, 15wt% of high-alumina aggregate with a particle size of 3-5mm; the powder is: 30wt% of high-alumina fine powder with a particle siz...

Embodiment 2

[0022] A low heat conduction heat insulation brick, its raw material compatibility is as follows: it is composed of a working layer and a heat insulation layer, the work layer and the heat insulation layer are bonded with a low heat conduction high temperature adhesive, and the heat insulation layer is a normal temperature compressive strength ≥ 0.5MPa Nano-microporous heat insulation board, the working layer is made of aggregate, powder, nano-powder, high-temperature reinforcing agent plus binder, the sum of aggregate, powder, nano-powder, and high-temperature reinforcing agent is 100wt%, and the binder Accounting for 5wt% of the sum of aggregate, powder, nanopowder, and high-temperature reinforcing agent; the aggregate is: 10wt% of high-alumina aggregate with a particle size of 0-1mm, 20wt% of high-alumina aggregate with a particle size of 1-3mm, 20wt% of high alumina aggregate with a particle size of 3-5mm; the powder is: 37wt% of high alumina fine powder with a particle siz...

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Abstract

The invention belongs to the technical field of refractory materials, and in particular relates to a heat-insulating brick with low thermal conductivity and a preparation method thereof. It consists of a working layer and a heat insulating layer, which are bonded with low thermal conductivity high temperature adhesive. The heat insulating layer is a nano-microporous heat insulating board with a compressive strength at room temperature ≥ 0.5MPa. The working layer is composed of a particle size of 0‑ 1mm high-alumina aggregate, high-alumina aggregate with a particle size of 1-3mm / / high-alumina aggregate with a particle size of 3-5mm, high-alumina fine powder with a particle size of <0.074mm, nano-powder, high-temperature reinforcing agent and binder . The average volume density of the product of the present invention is far lower than that of high-strength alkali-resistant bricks and anti-stripping high-alumina bricks, which can greatly reduce the self-weight of equipment; and the thermal insulation effect and service life are better than alkali-resistant bricks, which can achieve better energy-saving and emission-reduction effects .

Description

technical field [0001] The invention belongs to the technical field of refractory materials, and in particular relates to a heat-insulating brick with low thermal conductivity and a preparation method thereof. Background technique [0002] At present, most of the cement plant tertiary air ducts, calciners, preheaters, preheating cyclones and other medium and high temperature parts in the market are still lined with high-strength alkali-resistant bricks, and the insulation layer is calcium silicate board. The initial effect of this scheme is good, but with the prolongation of the use time, the local temperature is prone to be too high, resulting in the deformation of the wall pipe, and the subsidence and collapse of some refractory bricks, which seriously affects the normal operation of the cement kiln. Contents of the invention [0003] In order to solve the problems of existing high-strength alkali-resistant bricks and anti-flaking high-alumina bricks with short service l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/66B32B9/04B32B7/12B32B33/00
Inventor 袁林李全有李沅锦曹伟郑建立
Owner 郑州瑞泰耐火科技有限公司