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Preparation method of lightweight anorthite based thermal insulation material

A thermal insulation material, light calcium technology, applied in the field of thermal insulation materials, can solve the problems of casualties, property, loss, etc., and achieve the effect of protecting the environment, high porosity, and good thermal stability

Inactive Publication Date: 2014-07-23
HEFEI KESIFU SAFETY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the fires of building exterior wall insulation materials in Nanjing Central International Plaza, Harbin Jingwei 360-degree Twin Star Building, Jinan Olympic Sports Center, Beijing CCTV New Site Affiliated Cultural Center, Shanghai Jiaozhou Teacher's Apartment, and Shenyang Dynasty Wanxin Building all caused serious damage. Casualties and property losses, resulting in adverse effects

Method used

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  • Preparation method of lightweight anorthite based thermal insulation material
  • Preparation method of lightweight anorthite based thermal insulation material
  • Preparation method of lightweight anorthite based thermal insulation material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Add 80 parts by mass of fly ash and 20 parts by mass of gypsum into the ball mill tank, add 0.8% sodium hexametaphosphate and 1.2% water glass (modulus 3.5), add an appropriate amount of water, and prepare a solid phase content of 30 % slurry, and ball milled for 24 h, the speed of the ball mill was 180 r / min. Add 0.8% sodium lauryl sulfate to water and foam for 4 min to obtain a uniform foam. Afterwards, mix the ball-milled slurry with foam, stir evenly with a stirrer, pour it into a gypsum abrasive tool, and let it stand for 4 hours before demoulding. After drying at room temperature for 24 h, the green body was dried in a drying oven at 100 °C for 24 h, and then sintered at 1100 °C. First, the temperature was raised to 500 °C at a rate of 2 °C / min and kept for 1 h; then the temperature was raised to 1100 °C at a rate of 5 °C / min and kept for 2 h; finally, the temperature was cooled to 500 °C at a rate of 5 °C / min; The furnace is cooled to room temperature to obtain...

Embodiment 2

[0030] Put 85 parts of fly ash and 15 parts of gypsum into the ball mill jar, add 0.8% gum arabic and 1.2% water glass, add an appropriate amount of water, prepare a slurry with a solid phase content of 30%, and ball mill for 24 h . Add 1.2% sodium lauryl sulfate to water and foam for 5 min to obtain a uniform foam. Afterwards, mix the ball-milled slurry with foam, stir evenly with a stirrer, pour it into a gypsum abrasive tool, and let it stand for 4 hours before demoulding. After drying at room temperature for 24 h, the green body was dried in a drying oven at 100 °C for 24 h, and then sintered at 1100 °C. First, the temperature was raised to 500 °C at a rate of 2 °C / min and kept for 1 h; then the temperature was raised to 1100 °C at a rate of 5 °C / min and kept for 2 h; finally, the temperature was cooled to 500 °C at a rate of 5 °C / min; The furnace is cooled to room temperature to obtain a lightweight anorthite-based insulation material.

[0031] The resulting lightweigh...

Embodiment 3

[0033] Add 80 parts of fly ash, 12 parts of limestone and 8 parts of waste glass powder into the ball mill jar, add 1.0% gum arabic and 1.0% water glass, add an appropriate amount of water, and prepare a slurry with a solid phase content of 35% material and ball milled for 24 h. Add 1.2% sodium lauryl sulfate to water and foam for 4 min to obtain a uniform foam. Afterwards, mix the ball-milled slurry with foam, stir evenly with a stirrer, pour it into a gypsum abrasive tool, and let it stand for 4 hours before demoulding. After drying at room temperature for 24 h, the green body was dried in a drying oven at 100 °C for 24 h, and then sintered at 1100 °C. First, the temperature was raised to 500 °C at a rate of 2 °C / min and kept for 1 h; then the temperature was raised to 1100 °C at a rate of 5 °C / min and kept for 2 h; finally, the temperature was cooled to 500 °C at a rate of 5 °C / min; The furnace is cooled to room temperature to obtain a lightweight anorthite-based insulati...

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Abstract

The invention discloses a preparation method of a lightweight anorthite based thermal insulation material. The preparation method of the thermal insulation material comprises the steps of material mixing, foaming, blending, grouting, demoulding, drying and sintering. The porosity of the obtained thermal insulation material is 85-95%, the volume density is 150-380 kg / m3, the thermal conduction coefficient is 0.04-0.06 W / (m.K), and the compressive strength is 0.48-0.97 MPa, or the compressive strength is 0.53-1.13 MPa. The thermal insulation material prepared according to the invention takes anorthite as a main crystalline phase, so that the thermal insulation material has low thermal conductivity, low specific gravity, good thermal stability, creep resistance and erosion resistance. The preparation method disclosed by the invention is simple and easy to operate, low in cost, energy-saving and environmental friendly, and suitable for industrialized production; adopted raw materials are industrial wastes such as fly ash, gypsum, waste glass, and therefore, the preparation method has extremely high economic and social significances.

Description

technical field [0001] The invention belongs to the technical field of thermal insulation materials used in civil engineering, and in particular relates to the preparation of a light anorthite-based thermal insulation material. Background technique [0002] Fly ash is one of the largest industrial wastes in my country. With the rapid development of the power industry, the total amount of fly ash emitted by coal-fired thermal power plants has increased year by year. In 1995, the amount of fly ash discharged reached 125 million tons. In 2000, it was about 150 million tons, and by 2010 it reached 300 million tons. , causing enormous pressure on my country's national economic construction and ecological environment. However, my country is a country with limited resource reserves per capita. The comprehensive utilization of fly ash, turning waste into wealth and harm into profit, has become an important technical and economic policy in my country's economic construction. Pollutio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/22C04B35/622C04B38/10
Inventor 李晔陆松程旭东龚伦伦
Owner HEFEI KESIFU SAFETY TECH
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