70% Alumina Refractory Checker Brick from China
70% alumina refractory checker bricks are perforated bricks with 70% Al2O3 content, used in regenerator chambers of glass furnaces to promote heat recovery. These high-fired ceramic blocks meet Chapter 69 firing requirements and are classified as refractory constructional goods.
Duty Rate — China → Canada
0%
Import Tips
• Verify the alumina content is above 50% by weight and that the bricks are fired after shaping
• Provide a certificate of analysis to confirm composition
• Ensure the bricks are for constructional use in furnaces, as other refractory articles may be classified differently