Leucite Sand Substitute
Screened leucite particles (0.1-2mm) used as foundry sand substitute in metal casting molds due to high thermal stability. Classified HTS 2529.30.00 as sized but unworked leucite for industrial application. Angular grains provide superior mold strength versus silica sand.
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More Specific Codes
This product may fall under a more specific subheading:
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If used as natural silica substitute regardless of mineralogy
Functional classification as silica sands may supersede mineral name.
If pre-bonded into refractory shapes
Manufactured refractory articles of Chapter 69.
If sold as generic graded sand
Chapter Note prioritizes 2517 for graded aggregates.
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Import Tips & Compliance
• Include sieve analysis certification showing specific size fraction for foundry use
• Declare as 'refractory mineral' not construction sand to avoid 2517
• Test for respirable crystalline silica (<0.1%) for foundry safety compliance
Related Products under HTS 2529.30.00
Nepheline Syenite Powder
Finely ground nepheline syenite used primarily as a fluxing agent in ceramic and glass manufacturing to lower melting temperatures. This natural aluminosilicate mineral falls under HTS 2529.30.00 as unprocessed nepheline syenite in powdered form, distinct from synthetic materials. It provides silica, alumina, and alkalis essential for glaze and body formulations.
Leucite Ore Concentrate
Concentrated leucite (potassium aluminosilicate) ore extracted from volcanic deposits, used in specialty ceramics and as a potassium source in fertilizers. Classified under HTS 2529.30.00 as crude or beneficiated leucite, not chemically altered. Its high potash content makes it valuable for glass batch formulations.
Nepheline Syenite Lumps
Coarse lumps of nepheline syenite rock, typically 2-10 cm, mined for crushing into flux material for porcelain and tile production. Falls under HTS 2529.30.00 as unworked nepheline syenite, suitable for direct industrial processing. Low iron content ensures clean burning in white ceramics.
Feldspar-Nepheline Syenite Blend
Natural blend of nepheline syenite and feldspar (30-70% nepheline content) used in sanitaryware and electrical porcelain production. Classified under HTS 2529.30.00 due to dominant nepheline syenite characteristics and flux properties. Provides balanced vitrification for high-strength ceramics.
Leucite Crystals for Research
Hand-selected leucite crystals from volcanic deposits, used in geological research and as reference standards in mineralogy labs. HTS 2529.30.00 covers these unworked natural leucite specimens under 2.5g each. Ideal for X-ray diffraction analysis due to perfect cubic habit.
Micronized Nepheline Syenite Filler
Ultra-fine (<10 micron) nepheline syenite powder used as functional filler in paints, coatings, and plastics for matting and reinforcement. Still classified under HTS 2529.30.00 as physically processed (ground) but chemically unchanged mineral. Inert, low oil absorption enhances coating performance.