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High strength nanophase ceramic composite insulation material and preparation method thereof

A technology of nano-ceramics and heat-insulating materials, which is applied in the manufacture of converters, etc., and can solve problems such as failure to reach the temperature of the furnace shell, cracking, and short service life.

Inactive Publication Date: 2012-06-27
SHANGHAI GUOKE CHEM NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the thickness of the asbestos board is 20mm, the surface temperature of the furnace shell can only drop to 405°C, which is very close to the creep temperature of the furnace shell material, and the purpose of cooling the furnace shell cannot be achieved.
In addition, when used at 600°C, the asbestos sheet is prone to pulverization and cracking, and its service life is short

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The raw material components and weight ratios used are: 180 parts of floating beads, 30 parts of silica fume, 50 parts of potassium titanate whiskers, inorganic binder (195 parts of potassium silicate, 90 parts of sodium silicate + curing agent fluorosilicon 9 parts of sodium dihydrogen phosphate, 6 parts of aluminum dihydrogen phosphate) 300 parts, 300 parts of silica gel, 5 parts of titanium dioxide, 10 parts of kaolin, 10 parts of diatomaceous earth, 52 parts of three layers of aluminum silicate fiber grid cloth.

[0024] The preparation method is:

[0025] 1) Preparation of inorganic binder: Weigh potassium, sodium water glass, curing agent sodium fluorosilicate and aluminum dihydrogen phosphate, first crush and grind the bulk sodium fluorosilicate, and then mix with aluminum dihydrogen phosphate Gradually add to a stirring container filled with water glass and stir until the sodium fluorosilicate and aluminum dihydrogen phosphate are dissolved for later use;

[00...

Embodiment 2

[0032] The raw material components and weight ratios used are: 150 parts of floating beads, 30 parts of silica fume, 50 parts of potassium titanate whiskers, inorganic binder (195 parts of potassium silicate, 90 parts of sodium silicate + curing agent fluorosilicon 9 parts of sodium phosphate, 6 parts of aluminum dihydrogen phosphate) 300 parts, 300 parts of silica gel, 5 parts of titanium dioxide, 10 parts of kaolin, 10 parts of diatomaceous earth, 90 parts of 5 layers of aluminum silicate fiber mesh cloth.

[0033] Preparation:

[0034] 1) Preparation of inorganic binder: Weigh potassium, sodium water glass, curing agent sodium fluorosilicate and aluminum dihydrogen phosphate, first crush and grind the bulk sodium fluorosilicate, and then mix with aluminum dihydrogen phosphate Gradually add to a stirring container filled with water glass and stir until the sodium fluorosilicate and aluminum dihydrogen phosphate are dissolved for later use;

[0035] 2) Preparation of silica ...

Embodiment 3

[0041] The raw material components and weight ratios used are: 120 parts of floating beads, 30 parts of silica fume, 60 parts of potassium titanate whiskers, inorganic binder (195 parts of potassium silicate, 90 parts of sodium silicate + curing agent fluorosilicon 9 parts of sodium phosphate, 6 parts of aluminum dihydrogen phosphate) 300 parts, 300 parts of silica gel, 5 parts of titanium dioxide, 10 parts of kaolin, 10 parts of diatomaceous earth, and 108 parts of aluminum silicate fiber mesh cloth.

[0042] 1) Preparation of inorganic binder: Weigh potassium, sodium water glass, curing agent sodium fluorosilicate and aluminum dihydrogen phosphate, first crush and grind the bulk sodium fluorosilicate, and then mix with aluminum dihydrogen phosphate Gradually add to a stirring container filled with water glass and stir until the sodium fluorosilicate and aluminum dihydrogen phosphate are dissolved for later use;

[0043] 2) Preparation of silica gel: adding potassium titanate...

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Abstract

The invention discloses a high strength nanophase ceramic composite insulation material which comprises the following raw materials in parts by weight: 120-180 parts of floating beads, 10-50 parts of siliceous dust, 35-60 parts of potassium titanate whisker, 500-600 parts of silicone gel, inorganic bond or mixture of silicone gel and inorganic bond, 5-24 parts of titanium dioxide, 8-12 parts of kaoline, 10-16 parts of kieselguhr and 50-108 parts of alumina silicate fibre mesh cloth. The nanophase ceramic composite insulation material has high compressive strength, small heat conductivity factors, high temperature resistance of 800 DEG C to 1000 DEG C, very high compressive deformation rate, light material volume weight as well as good economic benefic and social benefit.

Description

technical field [0001] The invention relates to a nano-ceramic composite thermal insulation material, in particular to a high-strength thermal insulation material which can be used in a steelmaking converter and a preparation method thereof, belonging to the technical field of new materials. Background technique [0002] Ordinary thermal insulation materials are mostly powder, glass fiber, aluminum silicate fiber, etc., and their thermal conductivity is mostly around 0.1. Ordinary thermal insulation materials have low strength and high brittleness. They are easily broken and lose their function when encountering equipment movement or complex stress working environment (such as the thermal insulation lining of steelmaking converters). The compressive strength of ordinary aluminum silicate fiberboard is between 0.4 and 1.5MPa, and the compressive strength of lightweight mullite thermal insulation board reaches 3MPa, but the thermal conductivity is high, reaching 0.3w / m.k, and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/66C21C5/44
Inventor 初梅军于志杰郭延勇
Owner SHANGHAI GUOKE CHEM NEW MATERIAL
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