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Inorganic fibre block

A technology of inorganic fibers and ceramic fibers, applied in the field of inorganic fiber blocks, can solve the problems of high cost, increase in cost, increase in the proportion of ceramic fibers, etc., and achieve the effects of cheap manufacturing, small shrinkage, and high heat resistance

Inactive Publication Date: 2011-05-11
ITM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, when the bulk density is increased, the cost increases due to the increase in the proportion of ceramic fibers
[0008] In addition, alumina fiber shrinks less than ceramic fiber at high temperature and has excellent heat resistance, but it is far more expensive than ceramic fiber

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Thickness 33mm, bulk density 0.13g / cm 3 The alumina-silica-based ceramic fiber felt was heated at 1000°C for 10 minutes. Precipitation of mullite was confirmed by XRD. Lay up 13 sheets of this felt, compress it, and sew it with cotton thread to make a bulk density of 0.17g / cm 3 , 300 × 300 × 300mm inorganic fiber block. After heating this inorganic fiber block at 1200° C. for 24 hours, the shrinkage rate was 0.6%.

Embodiment 2

[0027] Thickness 33mm, bulk density 0.15g / cm 3 The alumina-silica-based ceramic fiber felt was heated at 1000°C for 10 minutes. Precipitation of mullite was confirmed by XRD. Lay up 12 sheets of this felt, compress it, and sew it with cotton thread to make a volume density of 0.20g / cm 3 , 300 × 300 × 300mm inorganic fiber block. After heating this inorganic fiber block at 1200° C. for 24 hours, the shrinkage rate was 0.4%.

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PUM

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Abstract

The invention provides an inorganic fibre block, which is formed with crystallized ceramic fibers obtained by heat treatment. The inorganic fibre block does not comprise aluminum oxide fibers.

Description

technical field [0001] This invention relates to an inorganic fiber block formed using a heat-treated ceramic fiber mat. Background technique [0002] Inorganic fiber products are often used as refractory and heat insulating materials for the inner lining of industrial furnaces. One of the inorganic fiber products is an inorganic fiber block. [0003] Most of the inorganic fiber blocks used for lining the furnace are produced by the following two methods. One is to cut the felt into small pieces of the same size, and stack these small pieces to form a laminate; the other is to bend a long and thin felt to form a laminate, and compress the laminate at the same time. A method of fixing into a prescribed shape by tying or sewing. [0004] As the material of the mat, amorphous ceramic fibers or crystalline alumina fibers are generally used. Compared with ceramic fibers, alumina fibers are more used in high temperature furnaces. [0005] Generally, inorganic fiber blocks shr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
Inventor 根本孝司
Owner ITM CO LTD