High-strength micro-expansive heat preservation material

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

Inactive Publication Date: 2014-07-23
WUHAN IRON & STEEL (GROUP) CORP
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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 raw materials with particle size greater than or equal to 1mm and less than or equal to 35 parts by weight of burnt gemstone aggregate, greater than or equal to 1mm and less than or equal to 25 parts by weight of burnt gemstone aggregate, greater than 0 and less than or equal to 1mm and 5 parts by weight of andalusite aggregate, 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 micropowder, 4 parts by weight of silica micropowder, 1 part by weight of high alumina cement, super polyphosphoric acid 0.01 parts by weight of sodium water reducer (additional), 8 parts by weight of aluminum dihydrogen phosphate binder (additional), 2 parts by weight of water (additional). After mixing evenly, cast on-site molding or make prefabricated parts and dry them on-site for masonry.

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

Embodiment 2

[0020] Prepare raw materials whose particle size is 30 parts by weight of burnt gem aggregate greater than or equal to 1 mm and less than or equal to 3 mm, 15 parts by weight of burnt gem aggregate greater than or equal to 1 mm and less than or equal to 1 mm, and 5 parts by weight of andalusite aggregate greater than or equal to 1 mm and less than or equal to 3 mm , 7 parts by weight of andalusite aggregate greater than 0 and less than or equal to 1 mm, 10 parts by weight of 200 mesh kyanite fine 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 micropowder, 4 parts by weight of high alumina cement, 0.1 parts by weight of sodium superphosphate superplasticizer (additional), 4 parts by weight of aluminum dihydrogen phosphate binder (additional), water 4 parts by weight (additional). After mixing evenly, cast on-site molding or make prefabricated...

Embodiment 3

[0023] Preparation of raw materials: 30 parts by weight of burnt gemstone aggregate greater than or equal to 1mm and less than or equal to 3mm, 10 parts by weight of burnt gemstone aggregate greater than or equal to 1mm and less than or equal to 1mm, 10 parts by weight of andalusite aggregate greater than or equal to 1mm and less than or equal to 3mm , 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 fine 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 micropowder, 5 parts by weight of high-alumina cement, 0.15 parts by weight of sodium superphosphate superplasticizer (additional), 3 parts by weight of aluminum dihydrogen phosphate binder (additional), 5 parts by weight of water (plus). After mixing evenly, cast on-site molding or make prefabricated parts and dry the...

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Abstract

The invention provides a high-strength micro-expansive heat preservation material comprising the following components in parts by weight: 20-60 parts of flint clay, 5-15 parts of andalusite, 2-12 parts of kyanite, 3-20 parts of alumina hollow balls, 2-15 parts of perlite, 1-6 parts of alumina micro powder, 1-4 parts of silicon dioxide micro power and 1-6 parts of high-alumina cement. The heat preservation material provided by the invention is high in strength and good in heat preservation performance under normal temperature and after being sintered, and is micro-expansive in volume after being sintered under high temperature. The heat preservation material can be tightly adhered to a furnace shell after being constructed on a liner of a high-temperature cylinder part such as a rotary kiln, a hot air pipeline and the like under the condition of drying and high-temperature sintering, so that the furnace lining structure damage caused by a gap formed between the liner and the furnace shell after the liner is shrunk can be reduced, the heat preservation effect of a furnace lining can be improved, and the service life of the furnace lining can be prolonged.

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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IPC IPC(8): C04B35/66
Inventor 张洪雷王悦徐国涛
Owner WUHAN IRON & STEEL (GROUP) CORP
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