Inert alumina ceramic ball
Inert alumina ceramic ball is widely used in many fields,such as petroleum,chemical engineering,fertilizer,smelting, medical treatment and environmental protection.Being the covering and supporting material and tower packing for catalyst in the reactor,ceramic ball has the feature of high temperature and plessure resistance,low water absorption,and stable chemical performance.It can not only resist the corrosion from the acid,alkali and other organic solvent,but also the temperature change in production process.The main role of ceramic ball is to increase the distributing spot of gas or liquid,also support and protect the activated catalyst with low strength. |
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（1） Main technical indices |
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feldstar |
feldstar mullite |
mullite |
mullite corundum |
corundum |
20-25 |
25-45 |
45-70 |
70-90 |
＞ 90 |
Heaping density（g/cm3） |
1.4-2.0 |
water absorption（%） |
＜ 3 |
＜ 1 |
Acid resistance（%） |
＞ 98 |
Alkaline resistance（%） |
＞ 80 |
＞ 82 |
＞ 85 |
＞ 90 |
＞ 95 |
Temp. urgent change resistance℃ |
＞ 250 |
＞ 300 |
＞ 500 |
＞ 700 |
＞ 800 |
Fire resistance℃ |
＞ 1300 |
＞ 1400 |
＞ 1500 |
＞ 1600 |
＞ 1700 |
Compressive strength
KN/pellet |
φ6 |
＞ 0.40 |
＞ 0.45 |
＞ 0.6 |
＞ 0.7 |
＞ 0.8 |
φ8 |
＞ 0.70 |
＞ 0.8 |
＞ 0.9 |
＞ 1.0 |
＞ 1.2 |
φ10 |
＞ 0.90 |
＞ 1.0 |
＞ 1.2 |
＞ 1.5 |
＞ 1.8 |
φ13 |
＞ 1.2 |
＞ 1.3 |
＞ 1.6 |
＞ 1.8 |
＞ 2.0 |
φ16 |
＞ 1.5 |
＞ 1.6 |
＞ 1.8 |
＞ 2.3 |
＞ 2.6 |
φ20 |
＞ 1.8 |
＞ 2.0 |
＞ 2.3 |
＞ 2.8 |
＞ 3.2 |
φ25 |
＞ 2.5 |
＞ 2.8 |
＞ 3.2 |
＞ 3.6 |
＞ 4.0 |
φ30 |
＞ 2.8 |
＞ 3.0 |
＞ 3.5 |
＞ 4.0 |
＞ 4.5 |
φ38 |
＞ 4.0 |
＞ 4.5 |
＞ 5.0 |
＞ 5.5 |
＞ 6.0 |
φ50 |
＞ 6.0 |
＞ 6.2 |
＞ 10.0 |
＞ 10.5 |
＞ 11.0 |
φ60 |
＞ 8.0 |
＞ 8.5 |
＞ 11.0 |
＞ 12.0 |
＞ 14.0 |
φ70 |
＞ 13.0 |
＞ 11.0 |
＞ 12.0 |
＞ 14.0 |
＞ 15.0 |
Remarks:Heaping density data is just for the reference, instead of examining basis. |
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（2）Main performance indices |
Item |
Unit |
Specification |
Composition |
Content |
Remarks |
specific gravity |
g/cm3 |
2.2-2.4 |
Al2O3 |
30-85% |
1、Al2O3 and SiO2 content ≥92%
2、Al2O3 and SiO2two ingredients heights may request the fresh host according to the user.
3、 Heaping density data is just for the reference, instead of examining basis. |
Water absorption |
% |
≤ 1 |
SiO2 |
7-65% |
Thermal conductiveity |
Kcal/mh℃ |
≥ 0.7 |
Fe2O3 |
＜ 0.5 |
Heat resistance |
℃ |
1300-1500 |
Ca0 |
＜ 1.5 |
Specific heat |
Cal/g℃ |
0.15-0.2 |
Na2O |
＜ 1.5 |
Quenched experiment |
℃ |
20-800 Never crack in three times |
MgO |
＜ 1 |
Acid resistance |
% |
≥ 99 |
K2O |
＜ 2.5 |
Alkaline
resistance |
% |
≥ 82 |
others |
tittle |
Hardness |
Mohs |
≥ 6.5 |
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Appearance |
White or yellow pellets |
（3）Variety of inert alumina ceramic ball
In terms ofAl2O3 content,Inert alumina ceramic ball can be divided into 17 varieties,from 25% and with a gap of 5%. |
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Variety |
1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
9 |
10 |
11 |
12 |
13 |
14 |
15 |
16 |
17 |
Contents of Al2O3（％） |
＜25 |
25 |
30 |
35 |
40 |
45 |
50 |
55 |
60 |
65 |
70 |
75 |
80 |
85 |
90 |
95 |
＞95 |
Remarks:Technological indices can be customized to meet user requirements. |
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（4）Specifications and varieties |
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Diameter (mm) |
3 |
6 |
8 |
10 |
13 |
16 |
20 |
25 |
30 |
38 |
50 |
65 |
75 |
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Diameter permit difference (mm) |
±1.0 |
±1.5 |
±2.0 |
±3.0 |
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Remarks:Technological indices can be customized to meet user requirements. |
High alumina ball
Ceramic grinding ball of high alumina has many advantages,including high density,high mechanical strength and great wearability.It belongs to a economical,widely-using and non-metallic grinding medium.This product is mainly used in mechanical,electronics and spaceflight.Also,it can be used in fertilizer,chemical engineering and other fileds.In addition to the spherical shape,we can made into the parts of pipe,ring,stick,beam and plate,in terms of the customer's requirements.
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chemical composition |
Physical feature |
Composition |
Content |
Item |
Unit |
Index |
Al2O3 |
80-90% |
Specific gravity |
g/cm3 |
2.8-3.5 |
SiO2 |
3-17% |
Thermal conductivity |
cal/g ℃ |
0.17-0.20 |
MgO |
0.5% |
Compressive strength |
kg/cm2 |
> 1500 |
Fe2O3 |
0.3% |
Hardne Hardness ss |
mohs |
≥7 grade |
Ca0 |
0.2% |
Wear loss |
% |
0.05 |
Na20 |
0.1% |
Water absorption |
% |
< 1 |
Others |
tittle |
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Remarks:Any technological indices can be produced as per user requirements. |
| Wearable ceramic ball |
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Wearable ceramic ball is widely applied in hydrogenation cracking, distillation of hydrogenating body, alkyl ,catalytic and reconstructive device and drying tower in refinery.Also used in callback of light oil in oilfield,treatment of various chemical drainage,translating stove in fertilizer factory,activated division equipment,hot air furnace and sulphuric acidic translater etc.
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(1)Main performance indices
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Item |
Quota |
Contents of Al2O3 |
55-65-95% |
Specific gravity |
2.7-2.8-3.7g/cm3 |
Hardness |
≥8.5 mohs |
Compressive strength |
≥1690MPa |
Water absorption |
≤0.2% |
Wear ability |
0.05% |
（2）Varieties and application of ceramic ball
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Type |
Application |
Size |
Hole-opening ceramic ball |
Catalytic carrier of high flux with low resistance |
Ø1-2mm，Ø2-4mm，Ø3-6mm
Ø5-10mm，Ø10-15mm，
Ø15-20mm，Ø20-25mm，
Ø25-30mm Ø30-40mm，
Ø50-60mm，Ø60-80mm |
Porous ceramic ball, pillar |
Catalyst for oil impurity filtering |
Heat-accumulating ceramic |
Heat-accumulating packing of air unit |
Fireproof ceramic ball
Fireproof ceramic ball can be divided into ordinary ceramic ball and high alumina ceramic ball.The ordinary ceramic ball is suitable for the translater and converter in sulphuric acid and fertilizer industries.And the high alumina one fit for hot air furnace,heating & converting furnace and other devices in used and steel industries.
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Item |
Index |
Remarks |
Compression resistance |
≥500kg/cm2 |
Any technological indices can be produced as per user requirements |
Soften temperature with weight |
≥1450℃ |
Fire resistance℃ |
≥1770℃ |
Void volume |
≤21 |
Thermal shrinkage |
≤0.1% |
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