High-temperature heat-insulation refractory mortar

A refractory mud and high temperature technology, applied in the field of heat-insulating refractory materials, can solve the problems of difficult maintenance of heat-insulating coating materials, endangering the physical and mental health of on-site workers, polluting the environment, etc., achieving easy baking, not easy to precipitate, and improved adhesion Effect

Active Publication Date: 2014-11-19
SINOSTEEL LUOYANG INST OF REFRACTORIES RES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the environmental pollution caused by the ceramic fiber paper material of the existing thermal insulation layer, which endangers the physical and mental health of the workers on site. At the same time, it provides a light-weight, environmentally friendly, Inorganic high-temperature heat-insulating refractory mud with good heat insulation performance, convenient construction and long shelf life

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The high-temperature heat-insulating refractory mud involved in this embodiment has solid powder components and mass percentages: 30% (0.5-1mm) of alumina hollow balls, 45% (100 mesh) of floating beads, 5% (325 mesh) of fused silica powder ), bentonite 20% (325 mesh); after weighing the powder, pre-mix it in the sand mixer for 10 minutes, then add 50% of the powder weight water and 15% of the powder weight phosphoric acid solution, the phosphoric acid solution concentration is 30%, mixed into a uniform slurry by stirring, suitable for manual application process.

Embodiment 2

[0022] The high-temperature heat-insulating refractory mud involved in this embodiment, the raw material components and mass percentages are: 20% (0.5-1mm) of alumina hollow balls, 50% of floating beads (100 mesh), 20% of fused silica powder (325 mesh), Bentonite 10% (325 mesh); after weighing the powder, pre-mix in the sand mixer for 10 minutes; then add 80% of the powder weight water and 10% aluminum dihydrogen phosphate solution, aluminum dihydrogen phosphate solution The concentration is 50%, and 0.1% citric acid is added, stirred and mixed into a uniform slurry, which is suitable for dipping process.

Embodiment 3

[0024] The high-temperature heat-insulating refractory mud involved in this embodiment, the raw material components and mass percentages are: 10% (0.2-0.5mm) of alumina hollow balls, 60% of floating beads (100 mesh), and 10% of fused silica powder (325 mesh) , bentonite 20% (325 mesh); after weighing the powder, pre-mix it in the sand mixer for 10 minutes; then add water and 15% aluminum dihydrogen phosphate solution accounting for 150% of the powder weight, and aluminum dihydrogen phosphate solution The concentration is 60%, and 0.3% citric acid is added, stirred and mixed to form a uniform slurry, which is suitable for spray coating process.

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Abstract

The invention discloses high-temperature heat-insulation refractory mortar and solves the problem of environmental pollution, short material shelf life, inconvenient construction maintenance or the like due to wrapping of the outer surface of an existing refractory material with a layer of heat preservation material. A preparation method of the high-temperature heat-insulation refractory mortar comprises the following steps: fully mixing aluminum oxide hollow spheres, floating beads, molten quartz powder and bentonite according to a weight part ratio in a sand mixer, adding a proper amount of water, inorganic bonder and foamer, and stirring to obtain the mortar. The high-temperature refractory mortar acts on the surface of the refractory material in a manner of dipping, spraying or coating, and is superior to existing ceramic fibers in linear shrinkage, porosity and thermal conductivity at 1200 DEG C. The high-temperature heat-insulation refractory mortar is simple in preparation process, diverse in construction process, light, environment-friendly and long in shelf life; after acting on the surface of the refractory material, the high-temperature heat-insulation refractory mortar is convenient to maintain, good in heat preservation effect and stable in use performance, and the normal operating temperature exceeds 1200 DEG C.

Description

technical field [0001] The invention belongs to the technical field of heat-insulating refractory materials, and mainly relates to a high-temperature heat-insulating refractory mud. Background technique [0002] During the service of most refractory products, the working surface is a hot surface, and the other end is a cold surface, which is in direct contact with the outside air. Usually, the temperature difference between the cold and hot surfaces is relatively large. From the perspective of energy saving, the heat loss is serious, resulting in low energy efficiency; for the material itself, due to the existence of temperature gradients, large thermal stress will be generated inside the structure, which has become an important factor leading to material damage. Based on the above reasons, a thermal insulation layer is compounded on the outer surface of the refractory material, especially for the refractory material that plays a structural support role, the material is usua...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C04B38/02
Inventor 钱凡刘国齐张伟马渭奎杨文刚于建宾马天飞姜欣
Owner SINOSTEEL LUOYANG INST OF REFRACTORIES RES
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