Phosphate-Bonded High Alumina Bricks from Mexico
Phosphate-bonded high alumina refractory bricks use phosphoric acid binders fired to develop mullite-phosphate bonds for abrasion resistance in cyclone burners. Enhanced strength at elevated temperatures. HTS 6902.90.10 classification.
Duty Rate — Mexico → United States
10%
Rate breakdown
9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
Import Tips
• P2O5 content declaration for chemical analysis
• Bond development temperature curve documentation
• Avoid water contact pre-installation advisory labels