High-Alumina bricks
High-Alumina bricks - TRIAL
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High-alumina bricks are produced on the base of the top quality calcinated fireclay, andalusite, bauxite, aluminium oxide, fused corundum, refractory clays and kaolins.
Two different technological processes – dry and semi-dry pressing are applied for the manufacturing.
This is carried out on computer controlled production lines.
High-alumina bricks are intended for linings of aggregates operating at elevated temperatures in various industrial branches.
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| TRIAL | Refractoriness | Chem. composition | Bulk density | Apparent porosity | Cold crushing strength | Refractoriness under load | |
|---|---|---|---|---|---|---|---|
| Signature | (SK) | Al2O3 (%) | Fe2O3 (%) | (g*cm–³) | (%) | (MPa) | (0C) |
| AT90K | 192/40 | 90 | 0,50 | 2,90 | 20,0 | 60,0 | 1660 |
| AT80BC | 177/35 | 80 | 2,00 | 2,80 | 18,0 | 80,0 | 1480 |
| AT80B | 177/35 | 80 | 2,00 | 2,80 | 18,0 | 80,0 | 1480 |
| AT65A | 182/37 | 65 | 1,00 | 2,50 | 18,0 | 60,0 | 1580 |
| AT60A | 179/36 | 60 | 1,30 | 2,45 | 16,0 | 50,0 | 1550 |
| AT55A | 177/35 | 55 | 1,60 | 2,40 | 16,0 | 60,0 | 1500 |
| AT50V | 175/34 | 50 | 1,60 | 2,20 | 20,0 | 40,0 | 1420 |
| AT45V | 175/34 | 45 | 2,00 | 2,15 | 20,0 | 25,0 | 1400 |
Identification marking of refractory bricks:
| a | b | c | d |
|---|---|---|---|
| AT | 80 | B | C |
- AT – high-alumina dense brick
- 80 – Al2O3 content in %
- A – andalusite-based
B – bauxite-based
K – corundum-based
V – high-alumina aggregate-based - C – with addition of Cr2O3
Dimensional tolerances:
| Sorte | Dimension < 150 mm | Dimension > 150 mm |
|---|---|---|
| AT | + 2,0 mm | + 1,5 % |
Other quality features to be agreed between the customer and the supplier.
Rectangular shapes:
| Labeling Refrasil | International labeling | Dimensions (l×b×h) in mm |
|---|---|---|
| C25 | NF2 | 250x123x65 |
| C25/76 | NF2-76 | 250x123x76 |
| 2C25 | 2D | 250x250x65 |
| P20 | NF2-20 | 250x123x20 |
| P30 | NF2-30 | 250x123x30 |
| P40 | NF2-40 | 250x123x40 |
| P50 | NF2-50 | 250x123x50 |
| P100 (PP1) | NF2-100 | 250x123x100 |
| V | 2B | 250x187x65 |
| C23 | NF1 | 230x114x65 |
| C23/19 | NF1-19 | 230x114x19 |
| C23/25 | NF1-25 | 230x114x25 |
| C23/38 | NF1-38 | 230x114x38 |
| C23/52 | NF1-52 | 230x114x52 |
| C23/60 | NF1-60 | 230x114x60 |
| C30 | NF3 | 300x148x65 |
| C30/100 | NF3-100 | 300x148x100 |
Side arches:
| Labeling Refrasil | International labeling | Dimensions (h×c×a/b) in mm |
|---|---|---|
| K6 | 2H6 | 123x250x68/62 |
| K10 | 2H10 | 123x250x70/60 |
| K16 | 216 | 123x250x73/57 |
| K26 | 2H26 | 123x250x78/52 |
Wedges arches:
| Labeling Refrasil | International labeling | Dimensions (h×c×a/b) in mm |
|---|---|---|
| D4 | 2G4 | 250x123x67/63 |
| D6 | 2G6 | 250x123x68/62 |
| D10 | 2G10 | 250x123x70/60 |
| D16 | 2G16 | 250x123x73/57 |
| D26 | 2G26 | 250x123x78/52 |
| 2D4 | 2GG4 | 250x250x67/63 |
| 2D6 | 2GG6 | 250x250x68/62 |
| 2D10 | 2GG10 | 250x250x70/60 |
| 2D16 | 2GG16 | 250x250x73/57 |
| 2D26 | 2GG26 | 250x250x78/52 |
Other shapes to be agreed between the customer and the supplier.