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High-temperature andalusite push plate and preparation method

A technology of andalusite and push plate, which is applied in the field of andalusite push plate and its preparation, which can solve the problems of high-temperature calcination and short service life of the push plate, and achieve the effects of reducing porosity, prolonging service life, and eliminating volume shrinkage

Inactive Publication Date: 2014-03-12
长兴宏业高科高温耐火材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the defects that the above-mentioned push plate is not long in service life, cannot be calcined at high temperature, and will shrink under calcination, and provide a high-temperature andalusite with low production cost, high flexural strength, long service life and high production efficiency Push plate and preparation method

Method used

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  • High-temperature andalusite push plate and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] By weight percentage as:

[0031] Andalusite particles 36%, of which 1mm andalusite particles 32.4% and 0.25mm andalusite powder 3.6%

[0032] White corundum powder 25%, of which 0.25mm white corundum powder 18% and 0.075mm white corundum powder 7%

[0033] Fused mullite powder 23%

[0034] Aluminum oxide powder 12%

[0035] Suzhou No. 2 kaolin 4%

[0036] Add 0.05% sodium methylcellulose as a binding agent, and the process steps are as follows:

[0037] Stir the above-mentioned raw material components evenly in a vertical stainless steel mixer according to the weight percentage, then put them into a horizontal Jiaolong machine for extrusion, store the trapped materials at room temperature for 10 days, and use them after cold pressing with a 500-ton press, and use them after natural drying The 16m-long high-temperature pusher oil kiln is calcined at 1550°C and kept for 8 hours.

Embodiment 2

[0039] By weight percentage as:

[0040] Andalusite particles 44%, of which 1mm andalusite particles 39.6% and 0.25mm andalusite powder 4.4%

[0041] White corundum powder 34%, of which 0.25mm white corundum powder 24% and 0.075mm white corundum powder 10%

[0042] Fused mullite powder 8%

[0043] Aluminum oxide powder 8%

[0044] Suzhou No. 2 kaolin 6%

[0045] Add 0.03% polyvinyl alcohol as a binding agent, and the process steps are as follows:

[0046] Stir the above-mentioned raw material components evenly in a vertical stainless steel mixer according to the weight percentage, then put them into a horizontal Jiaolong machine for extrusion, store the trapped materials at room temperature for 10 days, and use them after cold pressing with a 500-ton press, and use them after natural drying The 16m-long high-temperature pusher oil kiln is calcined at 1560°C and kept for 7 hours.

Embodiment 3

[0048] By weight percentage as:

[0049] Andalusite particles 50%, of which 1mm andalusite particles 45% and 0.25mm andalusite powder 5%

[0050] White corundum powder 22%, of which 0.25mm white corundum powder 24% and 0.075mm white corundum powder 10%

[0051] Fused mullite powder 15%

[0052] Aluminum oxide powder 8%

[0053] Suzhou No. 2 kaolin 5%

[0054] Add 0.07% maltodextrin as a binding agent, and the process steps are as follows:

[0055] Stir the above-mentioned raw material components evenly in a vertical stainless steel mixer according to the weight percentage, then put them into a horizontal Jiaolong machine for extrusion, store the trapped materials at room temperature for 10 days, and use them after cold pressing with a 500-ton press, and use them after natural drying The 16m-long high-temperature pusher oil kiln is calcined at 1580°C and held for 6 hours.

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Abstract

The invention relates to a high-temperature andalusite push plate and a preparation method. The preparation method comprises the following steps: sintering andalusite, white corundum, mullite, alumina micro powder and kaolin are used as main raw materials, and according to different weight percentage, the high-temperature andalusite push plate is prepared by sequentially performing mixing, ageing mixture, formation, drying and high-temperature sintering on the main raw materials. The high-temperature andalusite push plate overcomes the defects that the existing push plate has shorter service life, poor stability and low rupture strength, has the advantages of low apparent porosity, high rupture strength, fewer impurities and long service life, and can be recycled for more than 98 times at higher temperature.

Description

technical field [0001] The invention belongs to the technical field of refractory material preparation, and mainly provides an andalusite push plate and a preparation method. Background technique [0002] Push plate is a movable partition, which is often used in the preparation of refractory materials, especially widely used in the production of kiln products that require high-temperature calcination by using push plate kiln. The push plate kiln is a continuous heating and sintering equipment. According to the process requirements of the sintered products, the required temperature zone and power are arranged, and the products to be sintered are placed directly or indirectly on the push plate that is resistant to high temperature and abrasion. The product placed on the push plate is moved by the propulsion system according to the technological requirements of the product, and the sintering process of the product is completed in the furnace. In the process of completing this ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
Inventor 陈新源
Owner 长兴宏业高科高温耐火材料有限公司
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