Powder composition for refractory castable and refractory castable equipped therewith

A technology of refractory castables and compositions, which is applied in the field of powder compositions for refractory castables and refractory castables. It can solve the problems of high destructive strength and achieve high destructive strength, low thermal conductivity, light weight and thermal conductivity.

Inactive Publication Date: 2012-05-02
旭硝子セラミックス株式会社
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the existing refractory castables are composed of dense structures

Method used

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  • Powder composition for refractory castable and refractory castable equipped therewith
  • Powder composition for refractory castable and refractory castable equipped therewith
  • Powder composition for refractory castable and refractory castable equipped therewith

Examples

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Embodiment

[0052] Hereinafter, examples of the refractory castable of the present invention are used as examples (Example 1 to Example 3, Example 5 to Example 7) and examples of conventional refractory castables are used as comparative examples (Example 4 and Example 8). . In addition, this invention is not limited to these Examples.

[0053] Preparation of Lightweight Refractory Aggregate

[0054] The inner diameter of the furnace is 800mm, the height is 600mm, and the inner volume of the furnace is 0.6m 3 The electric arc melting furnace is used as a test furnace, and a 500kVA one is used as a transformer. In addition, the lining refractory material of the melting furnace uses Al 2 o 3 Electroformed refractories with a content of more than 97%.

[0055] as Al 2 o 3 The raw material uses Bayer alumina (Bayer alumina) with a purity of 99.3% or more as ZrO 2 Fused zirconia cullets with a purity of 99.5% or more are used as raw materials, and these raw materials are mixed into a ...

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Abstract

The invention provides the powder composition for a refractory castable and a refractory castable equipped therewith. The powder composition for refractory castable is high in breaking strength, light in weight and low in thermal conductivity. Alumina-zirconia hollow particles are adopted as the essential ingredients of the powder composition for a refractory castable. The alumina-zirconium hollow particles comprise 67-99 % of Al2O3 by mass and 1-33 % of ZrO2 by mass with the total mass thereof over 96%.

Description

technical field [0001] The present invention relates to a powder composition for a refractory castable and a refractory castable using the same, and particularly relates to a powder composition for a refractory castable suitable for forming inner lining layers of industrial furnaces such as heating furnaces and a refractory castable using the same. Background technique [0002] Generally, industrial furnaces such as heating furnaces are lined with monolithic refractories inside the outermost casing (casing) (also called iron sheet). The lining of this monolithic refractory material is usually made into a three-layer structure consisting of heat insulating plates, heat insulating castables, and refractory castables in order from the side close to the furnace shell. [0003] However, in recent years, environmental degradation caused by global warming has been criticized, and in order to reduce CO 2 In order to save energy and reduce consumption, it is expected to improve its ...

Claims

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Application Information

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IPC IPC(8): C04B35/66
Inventor 野田和也邹敏
Owner 旭硝子セラミックス株式会社
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