Zirconium Oxide and Calcium Fluoride Stabilizer
High-purity mixture of zirconium oxide (zirconia) and calcium fluoride for stabilizing foundry mold coatings against molten metal corrosion. HTS 3824.99.39 for inorganic foundry preparations combining ceramic oxides and fluorides. Essential for casting reactive alloys like titanium.
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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 pure calcium fluoride only
Individual fluorides without zirconia classify separately in Chapter 28
If with organic fluorocarbon additives
Organic fluoride compounds shift to different chemical mixture subheading
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Import Tips & Compliance
• Certify zirconia purity >99% with trace analysis; comply with fluoride emission regulations; use F-class fire-rated packaging
Related Products under HTS 3824.99.39
Calcium Chloride and Sodium Silicate Foundry Binder
A mixture of calcium chloride and sodium silicate used as a binder in foundry mold preparation to harden sand molds for metal casting. This product falls under HTS 3824.99.39 as a mixture of two or more inorganic compounds prepared for industrial foundry applications, not elsewhere specified. It provides strong adhesion and heat resistance during casting processes.
Sodium Silicate and Potassium Silicate Mold Binder
Liquid binder combining sodium silicate and potassium silicate for core production in metal foundries, offering rapid setting and high-temperature stability. Classified under HTS 3824.99.39 as a specific mixture of inorganic silicates designed for foundry mold/core binding, distinct from single-compound preparations. Enables precise casting of complex metal parts.
Zircon Flour and Sodium Hexametaphosphate Slurry Additive
Mixture of finely ground zircon (zirconium silicate) flour and sodium hexametaphosphate used as a deflocculant and binder stabilizer in foundry slurries for investment casting. HTS 3824.99.39 applies to this inorganic compound blend prepared specifically for mold-making processes. Improves slurry fluidity and shell strength in precision casting.
Bentonite Clay and Calcium Hydroxide Core Sand Additive
Powdered mixture of bentonite clay (aluminosilicate) and calcium hydroxide designed to enhance green strength and collapsibility of foundry core sands. Falls under HTS 3824.99.39 as a prepared blend of inorganic compounds for foundry mold/core production. Critical for producing defect-free metal castings.
Graphite Powder and Sodium Lignosulfonate Dispersant
Specialty mixture of micronized graphite powder and sodium lignosulfonate for coating foundry molds, providing lubricity and release properties. Although containing organic lignosulfonate, classified under HTS 3824.99.39 when inorganic graphite predominates in foundry preparations. Prevents metal adhesion during casting.
Alumina Silicate and Borax Flux Mixture
Fused mixture of alumina silicate and borax (sodium tetraborate) used as a binder flux in ceramic shell foundry cores. HTS 3824.99.39 covers this inorganic compound blend specifically prepared for high-temperature foundry bonding applications. Enhances thermal shock resistance.