Electro-fused Magnesia 98% Purity
High-purity electro-fused magnesia produced by melting magnesite in an electric arc furnace at temperatures exceeding 2800°C, resulting in a dense crystalline structure. Classified under HTS 2519.90.10.00 as fused magnesia, ideal for refractory linings in steelmaking due to its high resistance to slag and thermal shock.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If chemically precipitated rather than thermally fused
Synthetic magnesium oxide from chemical precipitation processes falls under inorganic chemicals in Chapter 28, not natural mineral products.
If not dead-burned and retains >40% CO2 as natural magnesite
Uncalcined or lightly calcined magnesite with significant carbonate content remains classified as raw mineral under 2520, not processed magnesia.
If chemically modified for specific industrial catalysts
Magnesia chemically treated with fluxes or binders for catalyst preparation moves to prepared chemical products in 3824.
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Import Tips & Compliance
• Verify certificate of analysis confirming >95% MgO content and fused production method to avoid reclassification as precipitated magnesium oxide under 2816.10
• Include mill test reports documenting sintering temperature (>1600°C for dead-burned) and bulk density to demonstrate compliance with fused/dead-burned definitions
Related Products under HTS 2519.90.10.00
Dead-burned Magnesia DBM-95
Dead-burned magnesia sintered at 1700-2200°C from calcined magnesite, achieving low reactivity and high hydration resistance with 95% MgO content. Falls under HTS 2519.90.10.00 as sintered magnesia, essential for basic refractory bricks in cement kilns and non-ferrous metal furnaces.
Fused Magnesia FM-P 99.5% for EAF
Premium fused magnesia with 99.5% MgO purity, electric arc fused for electric arc furnace (EAF) refractories, featuring exceptional corrosion resistance. HTS 2519.90.10.00 classification applies to this fused magnesia product used in high-purity steel production.
Sintered Magnesia 92% with Iron Oxide
Dead-burned magnesia containing 92% MgO with controlled iron oxide additions for enhanced sintering, used in basic oxygen furnace refractories. Properly classified in HTS 2519.90.10.00 as sintered magnesia permitting small quantities of other oxides added before sintering.
Large Crystal Fused Magnesia 97%
Fused magnesia featuring large periclase crystals (>100μm) for superior thermal stability in ladle refractories, 97% MgO purity. HTS 2519.90.10.00 covers this fused magnesia critical for secondary steelmaking.
Dead-burned Magnesia 0-100mm for Rotary Kilns
Coarse-grained dead-burned magnesia sized 0-100mm for rotary kiln linings in cement production, featuring low bulk density for thermal insulation. Classified under HTS 2519.90.10.00 as sintered magnesia for heavy-duty refractory applications.