Cerapor® Ceralu® Al2O3 foam ceramic filters have been used successfully for more than three decades in aluminum continuous casting and in the continuous casting of aluminum alloys for filtering and cleaning aluminum. They are available in two special variants. When selecting a filter, in addition to porosity, you should also consider the flow rate of the metal, the total tonnage cast per filter, the cleanliness of the metal before the filter, the preheating of the filter, and its chemical composition. Ceralu® filters are available in all standard porosities. In addition to standard sizes, Drache also offers the manufacture of customer-specific filter designs, so that the right Drache filter is available for every casting process. We would be happy to advise you on the selection of the appropriate filter for your flow rates and casting tonnage, taking into account individual process parameters such as the inclusion content of the melt.
Our Cerapor® Ceralu® Al2O3 foam ceramic filters are manufactured using certified, quality-tested processes.
Special characteristics
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Drache products are characterized by a wide range of properties and applications, from different filter sizes to special chemical resistances. All filters are available in different porosities.
Filter is ready to be used
To all aluminium alloys including those with high magnesium content and aerospace alloys
Mechanically strong at room and application temperature.
All filters are available in the sizes ranging from 9“ to 26“
The Cerapor Ceralu AL2O3 filter is available with two different gaskets —expanding seal and fiber gasket.
We will be happy to provide consultation for your demand for a customized filter size.
Feel free to contact us at any time!
The Cerapor® Ceralu® HF filter is particularly suitable when very high metal flow rates are required, which are no longer feasible or only difficult to achieve with conventional foam ceramic filters.
Drache Cerapor® Ceralu HF filters are available in the standard sizes 15“, 17”, 20,“ and 23” (but not 26″) with a porosity of PPI 40, 50, or 60.
The Cerapor® Ceralu® duplex filter combines two different porosities: the pores are coarser on the top side and finer on the bottom side.
The capacity of a Drache duplex filter is identical to that of a standard filter of similar size with a porosity corresponding to the average of the two porosities of the duplex filter. For example, a 17“ PPI 30/50 duplex filter has a similar capacity to a 17” PPI 40 standard filter.
All values are nominal values in kg/min; the actual flow rate may vary within a certain range.
| Filter | 9" | 12" | 15" | 17" | 20" | 23" | 26" | Double 23" | Double 26" |
|---|---|---|---|---|---|---|---|---|---|
| PPI 25 F25 | 83 | 169 | 240 | 324 | 479 | 698 | 978 | 1396 | 1956 |
| PPI 30 F30 | 73 | 146 | 209 | 293 | 438 | 584 | 789 | 1168 | 1578 |
| PPI 40 F40 | 63 | 109 | 146 | 219 | 334 | 480 | 695 | 960 | 1370 |
| PPI 50 F50 | 43 | 84 | 125 | 168 | 250 | 334 | 448 | 668 | 896 |
| PPI 60 F60 | 35 | 68 | 100 | 134 | 200 | 268 | 360 | 536 | 720 |
All values are nominal values in ton.
| Filter | 9" | 12" | 15" | 17" | 20" | 23" | 26" | Double 23" | Double 26" |
|---|---|---|---|---|---|---|---|---|---|
| PPI25 F25 | 12 | 25 | 36 | 49 | 70 | 105 | 147 | 210 | 294 |
| PPI 30 F30 | 11 | 22 | 31 | 43,9 | 65,6 | 87,6 | 118,3 | 172 | 236 |
| PPI 40 F40 | 9 | 16 | 22 | 32,8 | 50,1 | 72,0 | 104,3 | 144 | 288 |
| PPI 50 F50 | 6 | 13 | 19 | 25,1 | 37,5 | 50,1 | 67,1 | 100 | 200 |
| PPI 60 F60 | 5 | 10 | 15 | 20,1 | 30,0 | 40,1 | 54,0 | 80 | 108 |
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