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Powder composition for heat insulating castable and heat insulating castable using same

A castable and composition technology, which is applied in the field of thermal insulation castables and powder compositions for thermal insulation castables, can solve the problems of high thermal insulation and high thermal conductivity, and achieve the effects of excellent thermal insulation and low environmental load.

Active Publication Date: 2016-08-03
旭硝子セラミックス株式会社
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In addition, there is a refractory material containing hollow alumina as a fiber-free high heat-resistant and heat-insulating castable (refer to Patent Document 3), but the high thermal conductivity does not meet the needs of high heat insulation

Method used

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  • Powder composition for heat insulating castable and heat insulating castable using same
  • Powder composition for heat insulating castable and heat insulating castable using same
  • Powder composition for heat insulating castable and heat insulating castable using same

Examples

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Embodiment

[0069] Hereinafter, examples of the present invention (Examples 1 to 8) and comparative examples (Example 9) will be described. In addition, the present invention is not limited to these embodiments.

[0070] [Preparation of refractory lightweight aggregate]

[0071] The inner diameter of the furnace is 800mm, the height is 600mm, and the inner volume of the furnace is 0.6m. 3 The arc melting furnace is used as a test furnace and 500kVA is used as a transformer. In addition, the lining refractory material of the melting furnace uses Al 2 O 3 An electroformed refractory material with a content of more than 97%.

[0072] As Al 2 O 3 The raw material uses Bayeralumina with a purity of 99.3% or more as ZrO 2 The raw materials are fused zirconia cullet with a purity of 99.5% or more, and these raw materials are mixed into the specified composition to obtain the final Al 2 O 3 Composition and ZrO 2 The composition became the ratio (mass %) of Table 1 and it was made into a molten raw mate...

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Abstract

The present invention provides a powder composition for a heat insulating castable having higher heat resistance than conventional ones, having excellent heat insulating properties, and being lightweight and having low thermal conductivity, and a heat insulating castable using the same. A powder composition for a heat-insulating castable, which is a powder composition for a heat-insulated castable comprising alumina-zirconia hollow particles and high-alumina cement, wherein the alumina-zirconia hollow particles contain 67-99% by mass range of Al 2 o 3 , ZrO in the range of 1 to 33% by mass 2 , and their total amount is more than 96% by mass.

Description

Technical field [0001] The present invention relates to a powder composition for an insulating castable with low thermal conductivity suitable as a lining insulating layer of an industrial furnace such as a heating furnace, and an insulating castable using the powder composition. Background technique [0002] Generally, industrial furnaces such as heating furnaces are lined with amorphous refractories on the inner side of the outermost casing (also called iron sheet). The lining of the unshaped refractory material usually starts from the side close to the furnace shell and is made into a three-layer structure of thermal insulation board, thermal insulation castable, and refractory castable in order. [0003] Among them, adiabatic castables have been pointed out in recent years that the environmental deterioration caused by global warming has reduced CO 2 In order to save energy, it is desired to improve its performance due to the necessity of the emission. Especially in the iron fi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/66C04B38/02
Inventor 加藤田一平
Owner 旭硝子セラミックス株式会社