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Περιγραφή

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%
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