Πιστοποιήσεις:
- Aristotle University of Thessaloniki for Refractoriness
- CE.RE.CO for Refractoriness
- Istituto di Ricerche Agrindustia for Food Contact Suitability
- Democritos Institute for Absence of Asbestos
- T.U.V. Austria-Hellas for Quality Management System (ISO 9001:2008)
| CHEMICAL COMPOSITION – FIREBRICKS | |||
| DATA | FIREBRICKS ROKA REFRACTORIES | INTERNATIONAL STANDARDS | |
| SiO2 | 72,40% | 40-75% | |
| AI2O3 | 17,50% | 15-45% | |
| CaO | 0,29% | 0-0,7% | |
| Fe2O3 | 1,32% | 0-6% | |
| K2O | 3,43% | 0-4% | |
| MgO | 0,53% | 0-0,7% | |
| Na2O | 1,07% | 0-2% | |
| TIO2 | 0,95% | 0-2,8% | |
| MECHANICAL PROPERTIES – FIREBRICKS | ||
| Shapes and Dimenssions | 165kgf/cm2=16,18MPa | |
| Bending strength | 8,81MPa | |
| Cold crushing strength | 62,82Mpa=640,76kgf/cm2 | |
| Porosity | 7,2% p.w. | |
| Specific weight | 2,12gr/cm3 | |
| P.C.E. | >1100oC | |
| Thermal expansion | <1% | |
