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Method for manufacturing high-strength low-heat conduction coefficient xonotlite heat-insulating material

A low thermal conductivity, xonotlite technology, applied in ceramic products, applications, household appliances, etc., can solve the problems of low thermal conductivity, difficult xonotlite crystals, difficult to produce, etc., to achieve uniform material and high strength Effect

Inactive Publication Date: 2015-03-25
王民艳
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The traditional production method of xonotlite insulation material is to mix the siliceous material and the calcareous material according to the ca / si ratio (molar ratio) under the steam condition of saturated steam at 180°C-210°C and pressure at 1.8-2.2mpa. Synthesis between 0.9-1, due to the influence of raw materials and temperature and pressure, it is difficult to completely obtain xonotlite crystals, and it is even more difficult to produce calcium silicate with low thermal conductivity;

Method used

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  • Method for manufacturing high-strength low-heat conduction coefficient xonotlite heat-insulating material

Examples

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Effect test

Embodiment 1

[0055] A method for making a xonotlite type thermal insulation and fireproof board with high strength and low thermal conductivity comprises the following steps:

[0056] 1. The siliceous raw material body and the calcium raw material are prepared according to the Ca / Si ratio (molar ratio) of 0.5 to make a slurry;

[0057] 2. Pre-react the slurry obtained in step 1, the reaction time is 3 hours, and the reaction temperature is 30°C, so that it can fully form the tobermorite slurry;

[0058] 3. Add the slurry colloid obtained in step 2 to the active-repellent material to thicken and increase the activity

[0059] 4. The slurry obtained in step 3 is re-mixed, and the Ca / Si ratio (molar ratio) is 0.8, so that it can fully form the xonotlite composition;

[0060]5. Pour the slurry obtained in step 4 into a high-temperature and high-pressure reactor for synthesis. The steam temperature used is 180°C, the steam pressure is 1.8mpa, and the reaction time is 2 hours to ...

Embodiment example 2

[0064] A method for making a xonotlite type thermal insulation and waterproof board with high strength and low thermal conductivity comprises the following steps:

[0065] 1. The siliceous raw material body and the calcium raw material are prepared according to the Ca / Si ratio (molar ratio) of 1.1 to make a slurry;

[0066] 2. Pre-react the slurry obtained in step 1, the reaction time is 120 hours, and the reaction temperature is 120°C, so that it can fully form the tobermorite slurry;

[0067] 3. Add the slurry colloid obtained in step 2 to an active-repellent material to thicken and increase activity;

[0068] 4. The slurry obtained in step 3 is re-mixed, and the Ca / Si ratio (molar ratio) is 1.1, so that it can fully form the xonotlite composition;

[0069] 5. Pour the slurry obtained in step 4 into a high-temperature and high-pressure reactor for synthesis. The steam temperature used is 400°C, the steam pressure is 3.6mpa, and the reaction time is 10 hours to o...

Embodiment example 3

[0073] A method for making a xonotlite type thermal insulation and fireproof board with high strength and low thermal conductivity comprises the following steps:

[0074] 1. The siliceous raw material body and the calcareous raw material are prepared according to the Ca / Si ratio (molar ratio) of 0.8 to make a slurry;

[0075] 2. Pre-react the slurry obtained in step 1, the reaction time is 30 hours, and the reaction temperature is 60°C, so that it can fully form the tobermorite slurry;

[0076] 3. Add the slurry colloid obtained in step 2 to an active-repellent material to thicken and increase activity;

[0077] 4. The slurry obtained in step 3 is re-mixed, and the Ca / Si ratio (molar ratio) is 0.9, so that it can fully form the xonotlite composition;

[0078] 5. Pour the slurry obtained in step 4 into a high-temperature and high-pressure reactor for synthesis. The steam temperature used is 300°C, the steam pressure is 3mpa, and the reaction time is 4 hours to obtain an extrem...

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Abstract

The invention discloses a method for manufacturing a high-strength low-heat conduction coefficient xonotlite heat-insulating material. The method comprises the following steps: (1) mixing a siliceous material body and a calcareous material body according to the ca / si ratio (mole ratio) of 0.6-1.2; (2) carrying out pregelatinization reaction on a mixed body obtained from the step (1) to obtain a tobermorite colloid body; (3) adding the colloid body obtained from the step (2) to a thickening and activating material; (4) remixing the colloid body obtained from the step (3) according to the Ca / Si ratio (mole ratio) of 0.7-1; (5) injecting the colloid body obtained from the step (4) into a dynamic reaction kettle for reaction to obtain a porous fine poriform xonotlite extremely-light slurry body; (6) adding 1%-15% of fiber bodies to the slurry body obtained from the step (5), adding 1%-100% of inorganic diffusing colloid bodies, adding a right quantity of foam-stabilizing materials and foaming materials, and sufficiently stirring; and (7) carrying out compression moulding forming on a colloid slurry body obtained from the step (6), and drying. The heat-insulating material produced through the method disclosed by the invention has the characteristics of high strength, low heat conduction coefficient and uniformity in material.

Description

technical field [0001] The invention relates to a method for making a xonotlite calcium silicate plate with high strength and low thermal conductivity. The product is mainly used for heat preservation and fire prevention of building exterior walls and interior walls and heat preservation and energy saving of industrial furnaces. Background technique [0002] The traditional production method of xonotlite insulation material is to mix the siliceous material and the calcareous material according to the ca / si ratio (molar ratio) under the steam condition of saturated steam at 180°C-210°C and pressure at 1.8-2.2mpa. Synthesis between 0.9-1, due to the influence of raw materials and temperature pressure, it is difficult to completely obtain xonotlite crystals, and it is even more difficult to produce calcium silicate with low thermal conductivity; [0003] After many years of production tests, the present invention has created the following technology for production, so that xono...

Claims

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Application Information

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IPC IPC(8): C04B38/02C04B32/00
CPCC04B28/18C04B2111/28C04B2201/32C04B14/062C04B20/0048C04B38/02C04B40/024C04B40/0263C04B2103/48C04B2103/65
Inventor 王民艳
Owner 王民艳
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