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High-strength fireproof heat-preserving castable

A technology of refractory heat preservation and castables, which is applied in the field of refractory materials, can solve the problems of increased equipment weight and volume, increased material consumption and cost, and large heat capacity of kiln lining, and achieves increased contact specific surface area, reduced cost, insulation good heat effect

Inactive Publication Date: 2017-09-26
张静芬
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the use of high-temperature kilns, in order to ensure the thermal insulation effect of the kiln and improve the service life of the kiln lining, a combination of heavy bricks and light refractory materials is often used to build the kiln lining, resulting in a large heat capacity and reduced thermal efficiency of the kiln lining.
Because traditional lightweight energy-saving materials have the defects of large porosity, high water absorption, relatively low strength, and poor thermal insulation and energy-saving effects, they cannot be directly used in the working layer, and must be built with multi-layer refractory materials, which also increases the diameter of the pipe. This results in increased equipment weight and volume, increased material consumption and cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A high-strength refractory and heat-preserving castable, including the following components, raw materials and parts by weight: 50 parts of 1-8mm light magnesia dolomite, 10 parts of perlite raw ore, 10 parts of 1-0mm light Bonnet, 200 mesh light leaf 5 parts of paraffin powder, 10 parts of 325 mesh light mullite fine powder, 5 parts of silicon micropowder, Al with a particle size of 2~3μm 2 o 3 5 parts of micro powder, 3 parts of aluminate cement, 5 parts of 0.25-1.5mm vitrified microspheres, 0.31 part of sodium hexametaphosphate, 0.3 part of explosion-proof fiber.

[0017] Prepare the castable according to the following steps: add various raw materials in the plan to the mixer and mix them, add aluminum chloride solution accounting for 12% of its weight and stir evenly, pour the stirred materials into the mold, vibrate and shape, and bake after 24 hours of curing , when the temperature reaches 100°C, keep it warm for 4 hours, and when the temperature reaches 450°C, ...

Embodiment 2

[0019] A high-strength refractory and heat-preserving castable, including the following components, raw materials and parts by weight: 55 parts of 1-8mm light magnesia dolomite, 5 parts of perlite raw ore, 10 parts of 1-0mm light Bonnet, 200 mesh light leaf 5 parts of paraffin powder, 5 parts of 325 mesh light mullite fine powder, 5 parts of silicon micropowder, Al with a particle size of 2~3μm 2 o 3 5 parts of micro powder, 3 parts of aluminate cement, 5 parts of 0.25-1.5mm vitrified microspheres, 0.31 part of sodium hexametaphosphate, 0.3 part of explosion-proof fiber.

[0020] Prepare the castable according to the following steps: Add various raw materials in the plan to a mixer and mix them, add 11% aluminum chloride solution and stir evenly, inject the stirred materials into the mold, vibrate and form, and bake after curing for 24 hours. Keep it warm for 4 hours at 100°C, and hold it for 8 hours when the temperature reaches 450°C, then it can be put into use.

Embodiment 3

[0022] A high-strength refractory and heat-preserving castable, including the following components, raw materials and parts by weight: 53 parts of 1-8mm light magnesia dolomite, 5 parts of perlite raw ore, 10 parts of 1-0mm light Bonnet, 200 mesh light leaf 5 parts of paraffin powder, 5 parts of 325 mesh light mullite fine powder, 5 parts of silicon micropowder, Al with a particle size of 2~3μm 2 o 3 5 parts of micro powder, 3 parts of aluminate cement, 5 parts of 0.25-1.5mm vitrified microspheres, 0.31 part of sodium hexametaphosphate, 0.3 part of explosion-proof fiber.

[0023] Prepare the castable according to the following steps: Add various raw materials in the plan to a mixer and mix them, add 11% aluminum chloride solution and stir evenly, inject the stirred materials into the mold, vibrate and form, and bake after curing for 24 hours. Keep it warm for 4 hours at 100°C, and hold it for 8 hours when the temperature reaches 450°C, then it can be put into use. .

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Abstract

The invention discloses a high-strength fireproof heat-preserving castable. The castable is prepared from the following components in parts by weight: 50 to 55 parts of 1 to 8 mm light-weight konite, 5 to 10 parts of perlite raw ore, 10 to 25 parts of 1mm to 0mm light-weight Bonite, 5 to 10 parts of 200-mesh light-weight pyrophyllite powder, 5 to 10 parts of 325-mesh light-weight mullite fine powder, 5 to 10 parts of silica powder, 5 to 10 parts of Al2O3 micro powder with a particle size of 2 to 3 micrometers, 3 to 8 parts of aluminate cement, 5 to 10 parts of 0.25 to 1.5 mm glass beads, 0.31 part of sodium hexametaphosphate, and 0.3 part of explosion-proof fibers. The low heat-conduction fireproof energy-saving castable is obtained by virtue of the steps of stirring, uniformly mixing, oscillating molding, maintaining and baking and has the characteristics of light weight, high strength, low heat conduction coefficient, high temperature resistance, low water absorption rate and good compactness.

Description

technical field [0001] The invention relates to the technical field of refractory materials, in particular to a high-strength refractory and thermal insulation castable and a preparation method thereof. Background technique [0002] In blast furnaces, hot blast stove pipes, etc., in order to ensure the temperature of high-temperature gas during transportation, refractory materials must be built in the pipes. In the use of high-temperature kilns, in order to ensure the thermal insulation effect of the kiln and improve the service life of the kiln lining, a combination of heavy bricks and light refractory materials is often used to build the kiln lining, resulting in a large heat capacity and reduced thermal efficiency of the kiln lining. Because traditional lightweight energy-saving materials have the defects of large porosity, high water absorption, relatively low strength, and poor thermal insulation and energy-saving effects, they cannot be directly used in the working lay...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/043
CPCC04B35/043C04B2235/3217C04B2235/3222C04B2235/3418C04B2235/3427C04B2235/3463C04B2235/3481C04B2235/447C04B2235/5208C04B2235/77C04B2235/96C04B2235/9607
Inventor 张静芬
Owner 张静芬
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