High corundum furnace tube

A high corundum furnace and furnace tube technology, applied in the field of refractory materials, can solve the problems of limited high temperature resistance, easy melting, affecting service life, etc., and achieve the effect of relieving internal stress and increasing content

Inactive Publication Date: 2016-03-30
CHANGXING RONGJUN REFRACTORY EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most of the furnace tubes on the market are made of stainless steel, but this kind of furnace tube is not resistant to high temperature and is easy to melt. For this reason, there are corundum furnace tubes on the market, but generally only contain about 80% white corundum, and the high temperature resistance is limited. , and the thickness of white corundum is relatively uniform, resulting in poor wear resistance and compactness of the furnace tube, which seriously affects the service life

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] A high corundum furnace tube is produced through the following steps: (1) Mixing: Stir and mix 92% white corundum and 5% clay evenly, and add 3% alumina powder during the stirring process to form a billet ; The white corundum is a mixture of particles of different thicknesses made from the liquid formed by melting alumina powder at a high temperature of 2200 ° C. The specifications of the particles are 12 mesh, 24 mesh, 46 mesh, 70 mesh, and 120 mesh and 320 mesh, the clay uses kaolin. (2) Rolling: put the blank formed above on the punching machine for rolling; (3) Tamping forming: use manual, pneumatic or electric hammer to compact the blank, and add materials in layers during ramming. The maximum moisture content of the billet is controlled within 5%, and the critical particle size of the billet is larger than that of machine pressing; (4) Drying: put the above-mentioned formed furnace tube into a ventilated place and dry naturally for 24 hours; (5) High temperature s...

Embodiment 2

[0012] A high corundum furnace tube is produced through the following steps: (1) Mixing: Stir and mix 90% white corundum and 2% clay evenly, and add 8% alumina powder during the stirring process to form a billet ; The white corundum is a mixture of particles of different thicknesses made from the liquid formed by melting alumina powder at a high temperature of 2200 ° C. The specifications of the particles are 12 mesh, 24 mesh, 46 mesh, 70 mesh, and 120 mesh and 320 mesh, the clay uses kaolin. (2) Rolling: put the blank formed above on the punching machine for rolling; (3) Tamping and forming: use manual, pneumatic or electric hammer to compact the mud and form it, and add materials in layers during ramming and forming , the maximum moisture content of the billet is controlled within the range of 6%, and the critical particle size of the billet is larger than that of machine pressing; (4) Drying: put the above-mentioned formed furnace tube into a ventilated place and dry natura...

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PUM

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Abstract

The present invention relates to fireproof materials, in particular to a high corundum furnace tube. The furnace tube is sintered by 90%-95% of white corundum, 2%-7% of kaolin clay and 2%-4% of alumina powder at a high temperature; the white corundum is mixed by particles prepared from a liquid which is smelted by the alumina powder at the high-temperature of 2200 DEG C; and the specification of particles comprises 12 meshes, 24 meshes, 46 meshes, 70 meshes, 120 meshes and 320 meshes. By adopting the technical scheme, by using white corundum particles of different thicknesses to be mixed, the white corundum content is increased, and the internal stress of the furnace tube generated by expansion or contraction of the furnace tube materials in heating or cooling processes is alleviated; and the explosion probability of the furnace tube is reduced, and the service life of the furnace tube is prolonged.

Description

technical field [0001] The invention relates to refractory materials, in particular to a high corundum furnace tube. Background technique [0002] The purpose of the furnace tube is as the lining of various experimental electric furnaces, mainly to separate the heating element from the substance to be burned, to close the heating area and to place the substance to be burned. Furnace tubes have a wide range of applications, involving high-temperature test and analysis equipment in various industries, such as: coal test and analysis equipment, metallurgical powder test and analysis equipment, chemical glass industry test and analysis equipment, etc. At present, most of the furnace tubes on the market are made of stainless steel, but this kind of furnace tube is not resistant to high temperature and is easy to melt. For this reason, there are corundum furnace tubes on the market, but generally only contain about 80% white corundum, and the high temperature resistance is limited...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
Inventor 金钢良
Owner CHANGXING RONGJUN REFRACTORY EQUIP CO LTD
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