Alumina Ceramic Ball
99 High Alumina Support Media is equal Denstone® 99 Support Media. It is inchemical composition99+% alpha alumina and a maximum0.2wt% SiO 2 . Because of its highalumina content and low silica (SiO2 ), it’s a very excellent and ideal product for high temperature and steam applications, such as secondary reformers in ammonia processing, where leached silica will coat downstream equipment or foul the catalyst bed.99 High Alumina Support Media has very excellent thermal properties, with its high density high-temperature resistance 1550℃, also it’s a good choice for heat retention or equilibration media.For its superior chemical resistance, it’s suitable forapplications in olefin processes, such as ethylene dryers, where there’s the polymerization problem.
Mainly Usage:
1. Heat treatment furnace and toughened furnace
2. Inner liner tube and heating tube in electric furnace
2. Inner liner tube and heating tube in electric furnace
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Chemical competent
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Al2O3
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≥99.5%
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SiO2
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<0.2%
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Fe2O3
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<0.1%
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Alkaline matter
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<0.1%
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Density
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3.9 g/cm3
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Hardness
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9 M
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Water absorption
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<0.1%
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Ruptures trength
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>2000kg/cm2
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Gas tightness
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Kept for ten minutes at negative pressure of 1.3Kpa.
The pressure drop is less than 0.3Kpa. |
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Thermal tolerance
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Insert the pipe into the furnace at a depth of 20mm.
Heat to 1600ºC and maintain for 30 minutes. |
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Alkali tolerance
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In the Na2CO3 solution of 2N concentration, boil for
15 hours with the weight loss not greater than 20mg/dm2. |
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Volume resistance
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>9*10(5) Ω·cm/1600ºC
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Breakdown voltage
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20kv/cm |
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Expansion coefficient
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8*10(-8)
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Temperature for use
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Long-term: 1600ºC Short-term: 1800ºC
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Chill and abrupt heat
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1500ºC~room temperature not cracking thrice.
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Features:
1.Great mechanical strength
2.High softening temperature
3.Good resistance to thermal impact
4.Small thermal expansion coefficient
5.Good chill and abrupt heat properties
6. Resistance to acid and alkali corrosion
2.High softening temperature
3.Good resistance to thermal impact
4.Small thermal expansion coefficient
5.Good chill and abrupt heat properties
6. Resistance to acid and alkali corrosion
Application:
Electric appliance industry
Automotive industry
Mechanical industry
Engineer industry
Automotive industry
Mechanical industry
Engineer industry
