Low-density thermostable high-alumina lightening casting material

A light-weight castable, high-temperature-resistant technology, applied in the field of unshaped refractory materials, can solve problems such as the inability to meet the use requirements of advanced burner equipment

Active Publication Date: 2007-10-31
上海彭浦特种耐火材料厂有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, generally speaking, the bulk density is less than 1.35g/cm 3 The long-term service temperature of high-quality lightweight castables can only be b

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Al 2 o 3The mass percentage is 57.5%, CaO is 5.8%, and the specific ratio is 12% of 5-3mm lightweight mullite aggregate, 22% of 3-1mm lightweight mullite aggregate, and 1-0mm lightweight mullite aggregate Stone aggregate 4%, 2 Micronized 4%, α-Al 2 o 3 Micro powder 6%, pure calcium aluminate cement 20%, paper fiber 0.5%, organic fiber 0.2%.

[0040] Firstly weigh according to the above ratio, pre-mix the fiber and some fine powder less than 1.0mm, and then mix it with other granular materials, and fully break up the fiber.

Embodiment 2

[0042] Al that provides low density, high temperature resistant lightweight castables 2 o 3 The mass percentage is 50.8%, CaO is 3.7%, and the specific ratio is 7% of 5-3mm lightweight mullite aggregate, 28% of 3-1mm lightweight mullite aggregate, and 1-0mm lightweight mullite aggregate Stone aggregate 6%, 2 Micropowder 8%, α-Al 2 o 3 Micro powder 5%, pure calcium aluminate cement 13%, paper fiber 0.5%, organic fiber 2.0%.

[0043] Firstly weigh according to the above ratio, pre-mix the fiber and some fine powder less than 1.0mm, and then mix it with other granular materials, and fully break up the fiber.

[0044] project

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Abstract

The invention discloses a high-alumina lightweight injecting material with low density, low heat conductivity and stable high temperature volume and preparing method, which comprises the following steps: allocating mass percent with 26-55% lightweight mullite skeletal material, 5-20% floating pearl, 3-10% quartz, 10-25% blue spar, 2-10% silica micronized flour, 2-10% alpha-Al2O3, 10-25% pure alumina cement and 0. 5-5% fiber; getting the product. This invention possesses low volume density, small heat conductivity at 1000 deg. c and good high temperature volume stability, which can be used for long-period under 1400 deg. c.

Description

technical field [0001] The invention relates to a high-quality high-aluminum lightweight castable with low density, low heat conduction, stable volume at high temperature and a preparation method thereof, which can be used as a working lining of a burner for a long-term service temperature up to 1400°C, and belongs to the field of amorphous refractory materials. Background technique [0002] Lightweight castables have been widely used in various industrial kilns and burners, but due to the contradiction between heat insulation, strength and high temperature resistance, the bulk density is usually less than 1.35g / cm 3 High-quality lightweight castables are used as insulation layers in applications above 1300 °C. The traditional masonry method is composed of one layer of insulation layer and one layer of high-temperature-resistant heavy refractory material. This double-layer structure not only increases the inner lining The thickness will bring load to the device, and the cons...

Claims

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Application Information

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IPC IPC(8): C04B35/66C04B14/06C04B14/04C04B7/32
Inventor 赵玲娣王礼玮杨玲刘红波
Owner 上海彭浦特种耐火材料厂有限公司
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