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A high-strength micro-expansion thermal insulation material

A thermal insulation material and micro-expansion technology, which is applied in the field of refractory materials, can solve the problems of failure to meet the performance requirements of the thermal cylinder lining, volume shrinkage, and low strength, so as to improve the thermal insulation effect and service life, and improve the compressive strength and strength. high effect

Inactive Publication Date: 2016-03-30
武钢集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional lightweight insulation materials generally have low strength, and most of them shrink in volume after being fired at high temperature, which cannot meet the performance requirements of rotary kiln, hot air pipeline and other hot cylinder linings

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Prepare 35 parts by weight of scorched gem aggregate with a raw material particle size of 1mm or more and 3mm or less, 25 parts by weight of scorched gem aggregate with a raw material particle size of greater than 0 and less than 1mm, and 5 parts by weight of andalusite aggregate with a particle size greater than 0 and less than or equal to 1mm, 2 parts by weight of 200 mesh kyanite fine powder, 20 parts by weight of alumina hollow spheres, 2 parts by weight of perlite, 6 parts by weight of alumina powder, 4 parts by weight of silica powder, 1 part by weight of high alumina cement, super polyphosphoric acid 0.01 parts by weight of sodium water reducing agent (external), 8 parts by weight of aluminum dihydrogen phosphate binder (external), and 2 parts by weight of water (external). After being evenly mixed, it is poured on the spot or made into preforms and dried on the spot.

[0018] The compressive strength of the sample after drying at 110°C is 20.2MPa, the compressive s...

Embodiment 2

[0020] Prepare 30 parts by weight of burnt gem aggregate with a raw material particle size of 1mm or more and 3mm or less, 15 parts by weight of burnt gemstone aggregate of more than 0 and 1mm mesh, and 5 parts by weight of andalusite aggregate of 1mm or more and 3mm or less , 7 parts by weight of andalusite aggregate greater than 0 and less than or equal to 1mm, 10 parts by weight of 200 mesh kyanite powder, 16 parts by weight of alumina hollow spheres, 6 parts by weight of perlite, 2 parts by weight of vermiculite, fine alumina powder 3 parts by weight, 2 parts by weight of silica powder, 4 parts by weight of high alumina cement, 0.1 parts by weight of sodium superpolyphosphate water reducing agent (additional), 4 parts by weight of aluminum dihydrogen phosphate binder (additional), 4 parts by weight of water (Plus). After being evenly mixed, it is poured on the spot or made into preforms and dried on the spot.

[0021] The compressive strength of the sample after drying at 11...

Embodiment 3

[0023] Prepare 30 parts by weight of scorched gem aggregates of 1mm or more and 3mm or less, 10 parts by weight of scorched gem aggregates of greater than 0 and 1mm, and 10 parts by weight of andalusite aggregates of 1mm or more and 3mm or less , 5 parts by weight of andalusite aggregate greater than 0 and less than or equal to 1mm, 12 parts by weight of 200 mesh kyanite powder, 3 parts by weight of alumina hollow spheres, 15 parts by weight of perlite, 5 parts by weight of vermiculite, fine alumina powder 1 part by weight, 4 parts by weight of silica powder, 5 parts by weight of high alumina cement, 0.15 parts by weight of sodium superpolyphosphate water reducing agent (extra), 3 parts by weight of aluminum dihydrogen phosphate binder (extra), 5 parts by weight of water (Plus). After being evenly mixed, it is poured on the spot or made into preforms and dried on the spot.

[0024] The compressive strength of the sample after drying at 110°C is 13.6MPa, the compressive strength ...

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PUM

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Abstract

The invention provides a high-strength micro-expansion thermal insulation material, which comprises the following components: 20-60 parts by weight of coke gemstones, 5-15 parts by weight of andalusite, 2-12 parts by weight of kyanite, and 3 parts by weight of alumina hollow spheres. 20 parts by weight, 2-15 parts by weight of perlite, 1-6 parts by weight of alumina micropowder, 1-4 parts by weight of silica micropowder and 1-6 parts by weight of high alumina cement. The thermal insulation material of the invention has high strength at normal temperature and after burning, good thermal insulation performance, and slightly expanded volume after burning at high temperature. After the inner lining of the rotary kiln, hot air pipeline and other high-temperature cylinder parts is built, it is closely bonded to the furnace shell under the conditions of drying and high-temperature firing, so as to reduce the damage of the furnace lining structure caused by the gap between the inner lining and the furnace shell after shrinkage, and improve The insulation effect and service life of the furnace lining.

Description

technical field [0001] The invention relates to the field of refractory materials, in particular to a high-strength micro-expansion thermal insulation material. Background technique [0002] For rotary kilns, hot air pipelines and other horizontal cylinders at high temperatures, it is required that after the refractory lining is built, the overall volume will expand slightly under hot working conditions, so that the combination of the refractory lining and the shell of the cylinder is more perfect. It is tight, reducing the damage to the overall structure of the lining caused by the gap between the two due to volume shrinkage. At the same time, it has high strength to withstand scouring and extrusion stress, ensuring the overall life of the kiln. Traditional lightweight insulation materials generally have low strength, and most of them shrink in volume after being fired at high temperature, which cannot meet the performance requirements of rotary kiln, hot air pipeline and o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/66
Inventor 张洪雷王悦徐国涛
Owner 武钢集团有限公司