Fireclay bricks which Al2O3 content is generally more than 40%, and the Fe2O3 content is less than 2.0～2.5%.
Fireclay bricks which Al2O3 content is generally more than 40%, and the Fe2O3 content is less than 2.0～2.5%. The clinker in the ingredients is 65-85%, and the bound clay is 35-15%. The crushed combined clay and finely ground clinker are mixed and milled, and then mixed with granular clinker to make semi-dry mud, high-pressure molding, fired at about 1400 ℃, the performance is better. Clay bricks are weakly acidic at high temperatures and slightly less resistant to alkaline slag erosion, but increase with increasing Al2O3 content.Thermal stability is better than silicon brick, magnesium brick etc.
| Items | Behaviors | ||
| ZGN-42 | GN-42 | ||
| Al2O3 , % ≥ | 42 | 42 | |
| Fe2O3≤ | 1.6 | 1.7 | |
| Refractoriness, ℃ ≥ | 1760 | 1760 | |
| Refractoriness under load(0.2MPa) °C ≥ | 1450 | 1430 | |
|
Permanent Linear Change % ≤ |
1450℃,3h |
+0 -0.2 |
+0 -0.3 |
| Apparent Porosity,% ≤ | 15 | 16 | |
| Cold Crushing Strength, Mpa ≥ | 53.0 | 42.0 | |
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