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Composite roll outer periphery material and preparation method thereof

A composite roll and outer ring technology, which is applied in the field of high temperature resistant fiber composite roll outer ring material and its preparation, can solve the problems of easy wear and cracking, short service life, etc., and achieve good extrusion resilience, long service life, surface smooth effect

Active Publication Date: 2012-11-07
NINGBO VULCAN TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

And the currently used asbestos fiber rollers are easy to wear and crack under high temperature (above 1100°C) conditions, and have a short service life (less than 3 months), which brings troubles of frequent roller replacement to production and becomes a bottleneck in the production of high-temperature furnaces

Method used

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  • Composite roll outer periphery material and preparation method thereof
  • Composite roll outer periphery material and preparation method thereof
  • Composite roll outer periphery material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Accurately weigh the following raw materials: 400 grams of high alumina fiber, 250 grams of CA-50 aluminate cement, 250 grams of kaolin, 60 grams of alumina micropowder, 20 grams of silica micropowder, 20 grams of kyanite, plus flocculant ( Cationic polyacrylamide) 7.0 g, water 15000 ml, mixed by mechanical stirring for about 30 minutes, until the slurry has good fluidity and good dispersibility on the hand, stop stirring.

[0044] The above slurry is subjected to vacuum filtration on a suction filter, and the upper and lower surfaces are required to be flat, and then taken out for machine press molding. After press filtration, the moisture content of the product is controlled at about 20-30%. After taking out the mold, carry out dry curing in the shade for 24 hours, and then bake in an environment of 110°C for 8 hours.

[0045] as attached figure 1 Shown: the dried green body is punched into a ring on a punching machine (i.e., the outer ring 2 of the high-temperature-re...

Embodiment 2

[0047] Accurately weigh the following raw materials: 450 grams of high alumina fiber, 270 grams of CA-50 aluminate cement, 315 grams of clay, 45 grams of alumina micropowder, 22.5 grams of silica micropowder, 22.5 grams of kyanite, plus flocculant ( Cationic polyacrylamide) 7.5 grams, water 16000ml, mixed by mechanical stirring method for about 30 minutes, until the slurry has good fluidity and good dispersibility on the hand, stop stirring.

[0048] Filter the above slurry on a filter press with a pressure of 0.6~1.0MPa. The upper and lower surfaces are required to be smooth, and the moisture content of the product after the filter is controlled at about 20~30%. After taking out the mold, carry out dry curing in the shade for 24 hours, and then bake in an environment of 110°C for 8 hours. Put the dried green body on the heat-resistant steel roll core, and use a lathe for metal processing to trim the billet to prepare a high-temperature-resistant and long-life composite roll. ...

Embodiment 3

[0050] Accurately weigh the following raw materials: 374 grams of polycrystalline mullite fiber, 225 grams of CA-70 aluminate cement, 225 grams of kaolin, 75 grams of alumina micropowder, 18.7 grams of silica micropowder, 18.7 grams of kyanite, Add 7.0 grams of flocculant (cationic polyacrylamide) and 15,000 ml of water, mix them with mechanical stirring for about 30 minutes, and stop stirring until the slurry has good fluidity and good dispersibility.

[0051] Filter the above slurry on a filter press with a pressure of 0.6~1.0MPa. The upper and lower surfaces are required to be smooth, and the moisture content of the product after the filter is controlled at about 20~30%. After taking out the mold, carry out dry curing in the shade for 24 hours, and then bake in an environment of 110°C for 8 hours. Put the dried green body on the heat-resistant steel roll core, and use a lathe for metal processing to trim the billet to prepare a high-temperature-resistant and long-life compo...

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Abstract

The invention discloses a composite roll outer periphery material which comprises 10-80 parts of high-aluminum fibers or polycrystalline mullite fibers, 5-40 parts of CA-50 or CA-70 aluminate cement, 5-40 parts of clay or kaoline, 0-9 parts of silicon oxide or aluminum oxide micro-powder, 0.5-5 parts of silica micro-powder, 0.5-5 parts of kyanite, 0.2-5.0 parts of flocculants and 1000-4000 parts of water. The invention further discloses a preparation method of the composite roll outer periphery material, and the method includes: dispersing the high-aluminum fibers or the polycrystalline mullite fibers in water, and then adding the residual raw materials to stir for 5-60 minutes; and forming by means of pressure filtration or suction filtration, drying in shade and conserving for 8-72 hours, and curing for 2-48 hours at the temperature of 80-160 DEG C. The composite roll outer periphery material has the advantages of service life longer than six months, no asbestos fibers, resistance to high temperature of 1200-1500 DEG C, anti-oxidation, high abrasive resistance, good thermal shock resistance and excellent nodulation resistance.

Description

technical field [0001] The present invention relates to a high temperature resistant fiber composite roll outer ring material and a preparation method thereof, in particular to a high temperature resistant long life composite roll suitable for fiber compounding used in heat treatment furnaces such as stainless steel, silicon steel sheets, galvanized sheets, etc. Outer ring material and its preparation method. Background technique [0002] Bottom rolls of continuous heat treatment furnaces for silicon steel, stainless steel, and galvanized sheets in the metallurgical industry are used for a long time in a reducing atmosphere or a weak oxidizing atmosphere at a high temperature of 800~1200°C. Therefore, not only the hearth roll is required to have high high temperature strength, but also it is required to have good chemical stability, wear resistance, and no nodules on the surface in a reducing atmosphere or a weak oxidizing atmosphere, so as to ensure that the silicon steel s...

Claims

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Application Information

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IPC IPC(8): C04B35/66
Inventor 邬国平周渭良杨勇辉王圈库戚明杰
Owner NINGBO VULCAN TECH CO LTD
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