Zircon-Based Gunning Refractory Mix
A dry refractory powder of zircon flour and clay binders for pneumatic gunning onto furnace walls. Falls under HTS 3816.00.20.50 as other refractory concretes, ideal for quick maintenance in glass and aluminum melting furnaces up to 1750°C. Provides excellent corrosion resistance against molten glass.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If pure zircon sand or flour without binders
Unbound zircon is classified as natural sands/minerals in Chapter 25.
If pre-applied as cast or molded furnace linings
Shaped refractory products shift to Chapter 69 subheadings.
If high-silica variants misread as silica gels
Silica-based chemicals without refractory context fall under inorganic chemicals.
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Import Tips & Compliance
• Zircon content (>60%) must be certified; provide abrasion and thermal shock test data
• Gunning-grade particle size distribution specs prevent confusion with general zircon powders
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