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High-strength fire-resistant thermal insulation material

A refractory thermal insulation and high-strength technology, applied in the field of thermal insulation materials, can solve the problems of affecting the thermal insulation and overall stability of the furnace lining, adverse pouring construction due to strong water absorption, and structural deformation of the kiln lining, etc., and achieve unique waterproofness and integrity. Continuous, excellent thermal insulation performance

Active Publication Date: 2014-07-30
内蒙古包钢利尔高温材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, aluminum silicate ceramic fiber boards or fiber blankets are often used as insulation materials between the refractory lining and iron shell of kilns at temperatures above 800 °C. However, fibrous insulation materials generally have a loose and porous structure, and strong water absorption is not conducive to pouring construction. In addition, crystallization will occur after long-term use at 800-1000°C, which will make the fibers brittle and pulverized, causing the insulation layer to collapse and become thinner, which will cause the kiln lining structure to deform, loosen, and bricks will fall off. Aluminum leakage phenomenon, used as the insulation layer between the refractory lining and the iron shell of the rotary kiln, ladle, tundish, torpedo car, etc., will easily cause the surface temperature to rise in the middle and later stages, and the iron shell will deform, affecting the heat preservation and overall stability of the furnace lining

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Step 1. Preparation of expanded vermiculite: After slowly heating flake vermiculite from room temperature to 800°C, quickly put it into a heating furnace heated to 1000°C for high-temperature roasting and puffing, and after puffing, the expanded vermiculite material is obtained by crushing and winnowing and grading ;

[0030] Step 2, preparation of matrix: put 2% clay, 2% refractory cement, and 1% dextrin into the mixed powder matrix obtained by mixing in a mixing equipment for 60 minutes;

[0031] Step 3, select 95% of the expanded vermiculite material prepared in step 1, then add a binder that accounts for 30% of the total weight of the initial material and stir, and add a waterproofing agent that accounts for 6% of the total weight of the initial material after stirring evenly. Stir well and moisten; then add the mixed powder prepared in step 2 and mix well;

[0032] Step 4: Prepare shaped products of various required sizes by conventional machine press molding, dry...

Embodiment 2

[0035] Step 1. Preparation of expanded vermiculite: After slowly heating flake vermiculite from room temperature to 800°C, quickly put it into a heating furnace heated to 1000°C for high-temperature roasting and puffing, and after puffing, the expanded vermiculite material is obtained by crushing and winnowing and grading ;

[0036] Step 2, preparation of matrix: put 5% clay, 3% refractory cement, and 2% dextrin into the mixed powder matrix obtained by mixing in the mixing equipment for 50 minutes;

[0037] Step 3, select 90% of the expanded vermiculite material prepared in step 1, then add a binder that accounts for 28% of the total weight of the initial material and stir, and add a waterproofing agent that accounts for 5% of the total weight of the initial material after stirring evenly. Stir well and moisten; then add the mixed powder prepared in step 2 and mix well;

[0038] Step 4: Prepare shaped products of various required sizes by conventional machine press molding, d...

Embodiment 3

[0041] Step 1. Preparation of expanded vermiculite: After slowly heating flake vermiculite from room temperature to 800°C, quickly put it into a heating furnace heated to 1000°C for high-temperature roasting and puffing, and after puffing, the expanded vermiculite material is obtained by crushing and winnowing and grading ;

[0042] Step 2, preparation of matrix: put 8% clay, 5% refractory cement, and 2% dextrin into the mixed powder matrix obtained by mixing in a mixing equipment for 40 minutes;

[0043] Step 3, select 85% of the expanded vermiculite material prepared in step 1, then add a binder that accounts for 28% of the total weight of the initial material and stir, and add a waterproofing agent that accounts for 5% of the total weight of the initial material after stirring evenly. Stir well and moisten; then add the mixed powder prepared in step 2 and mix well;

[0044] Step 4: Prepare shaped products of various required sizes by conventional machine press molding, dry...

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Abstract

The invention discloses a high-strength fire-resistant thermal insulation material. A preparation method of the high-strength fire-resistant thermal insulation material comprises the following steps: preparing a shaped product with the required size by using expanded vermiculite, clay, refractory cement and dextrin as initial materials and adding a waterproof agent and a binding agent in a mechanical pressing forming manner, wherein a nano-modification organic silicon rubber solution is used as the waterproof agent, and the binding agent is an inorganic binding agent, drying, carrying out heat preservation, and baking at a high temperature, thus obtaining the high-strength fire-resistant thermal insulation material. The high-strength fire-resistant thermal insulation material has the advantages of good structure and volume stability, high strength, low cost, simple process, convenience for construction and baking, environmental protection, safety and the like.

Description

technical field [0001] The invention relates to a thermal insulation material, in particular to a high-strength refractory thermal insulation material with expanded vermiculite, clay, refractory cement and dextrin as initial materials. Background technique [0002] In the industrial field, for all kiln bodies and furnace bodies that are higher than normal temperature, especially high-temperature kilns and high-temperature furnaces, in order to prevent heat loss, insulation materials are used in the furnace body or kiln body. At present, aluminum silicate ceramic fiber boards or fiber blankets are often used as insulation materials between the refractory lining and iron shell of kilns at temperatures above 800 °C. However, fibrous insulation materials generally have a loose and porous structure, and strong water absorption is not conducive to pouring construction. In addition, crystallization will occur after long-term use at 800-1000°C, which will make the fibers brittle and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/34C04B20/06
Inventor 张克强王国田吴爱军张艺缤崔明奎王磊
Owner 内蒙古包钢利尔高温材料有限公司
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