| Product description : |
(1) Introduction
The inert alumina ceramic ball is broadly utilized as the covering or supporting materials of the catalyst in the reactors and the packing in the columns in such varied areas, for example, petroleum, chemical industry, chemical fertilizer, natural gas, and environmental protection etc. There are lots of merits for it, for instance, the stronger resistance to high temperature and high pressure, lower ratio of the moisture absorbing, more stable chemical properties, and so on. It is capable of enduring the corrosion of acid, alkali, and organic solvent. In addition, it can also bear the rapid transitions of temperature during the operation. In fact, its principal functions are to accelerate the distribution of gas or liquid, and support or protect the active catalyst, which especially has the relevantly lower mechanical strength.
(2) Chemical Compositions
Chemical compositions Content
Al2O3 (Standard value +4) %
Al2O3+SiO2 ≥92%
Fe2O3 <1%
(3) Physical and chemical properties
Main crystal phases
Al2O3
Property Feldstar Feldstar-mullite Mullite Mullite-corundum Corundum
20-25 25-45 45-70 70-90 >90
Bulk density, (g/cm3) 1.3-2.0
Water sorption, （%） <3 <1
Acid resistance（%） >98
Alkali resistance（%） >80 >82 >85 >90 >95
Spalling resistance（℃） >250 >300 >500 >700 >800
Refractoriness(℃) >1300 >1400 >1500 >1600 >1700
Crushing strength, KN/particle ?6 >0.40 >0.45 >0.6 >0.7 >0.8
?8 >0.7 >0.8 >0.9 >1.0 >1.2
?10 >0.9 >1.0 >1.2 >1.5 >1.8
?13 >1.2 >1.3 >1.6 >1.8 >2.0
?16 >1.5 >1.6 >1.8 >2.3 >2.6
?20 >1.8 >2.0 >2.3 >2.8 >3.20
?25 >2.5 >2.8 >3.2 >3.6 >4.0
?30 >2.8 >3.0 >3.5 >4.0 >4.5
?38 >4.0 >4.5 >5.0 >5.5 >6.0
?50 >6.0 >6.2 >10.0 >10.5 >11.0
?60 >8.0 >8.5 >11.0 >12.0 >14.0
?75 >13.0 >11.0 >12.0 >14.0 >15.0
Note: It may only be provided as the reference for the bulk density, and it is not as the evidence of check.
(4) Main specifications and types
a) Specifications and allowable deviation of diameter
Unit：mm
Diameter? 3 6 8 10 13 16 20 25 30 38 50 65 75
Allowable deviation ±1.0 ±1.5 ±2.0 ±3.0
The product of other specifications can also be prepared according to customers' requirement.
b) Assortments
In accordance with the content of inert Al2O3 from 25% to 95%, there are 17 assortments on every 5% as a grade.
ITEM No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17
AL203 content, (%) <25 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 >95
(5) Notice to ordering goods.
a) When ordering goods, customers should introduce the radical situations of the equipment,
including the sizes of reactors, and the operational temperature etc.
b) Customers should provide the specification, types, and the total content of Si, Al related to the required product.
c) As the inert ceramic ball belongs to the natural tight stacking in the reactors, customers should consult with our technological staff to determine the amounts according to the practical loading volume, and remain 15-20% margins
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