Zircon Silicate powder is generally found inland of ancient coastlines, some of which can be found very far inland, where the heavier mineral sands formed hardened deposits. These deposits are typically mined via dry or wet (dredge) mining techniques. Typical Chemical Analysis: ZrO2+HfO2 65.5-66.5% Fe2O3 0.04-0.07% TiO2 0.15-0.19% Al2O3 0.40-0.90% P2O5 0.06-0.09% SiO2(Total) 32.2-33.2% Free SiO2(as quartz) 0.25-0.45% U 200-230PPM Th 150-170PPM Physical Properties Refractive index:1.93 to 2.01 Specific Gravity:4.6-4.71g/cm3 Mohs Hardness:7.5-8 Melting point:2340-2550 Properties High refractive index High melting point High spatial and thermal stability at elevated temperatures Low coefficient of linear expansion - good resistance to thermal shock Moderate to high thermal conductivity Low wettability by molten metal Clean and round grains, which can be bonded at little cost and with little material Binding ability with all organic and inorganic moulding sand binders Chemical stability Low solubility in molten silica or silicates Good dielectric properties Packing:30/40kgs PVC bags+1mt big bag Main Applications Foundry,ceramics, chemicals, glass, refractory, abrasive washing/cleaning/blasting and nuclear industry etc Available sizes:60-100mesh 80-120mesh 100-200mesh 200-325mesh 200mesh 325mesh 2000mesh
Chemical Analysis ä½Silica SiO2 61.30 % ä½Magnesium Oxide MgO 33.50 % ä½Alumina Al2O3 0.10 % ä½Iron Oxide Fe2O3 0.15 % ä½Lime CaO 0.30 % ä½Magn. Proef Max. 0.009 % ä½Loss on Ignition [at 1050 oC] 4.63 %. Physical Analysis ä½Density (ISO 787/10) 2.75 g / ml ä½Bulk Density (ISO 787/11) 0.70 g / ml ä½Loose Bulk Density 0.40 g / ml ä½Hardness (Mohs) 1 ä½Refractive Index 1.75 ä½BET Surface Area 5.6 m2 / g ä½Oil Absorption 35 íV 40 g / 100 g ä½HCL Soluble Content ( Acid ) max. 1.50% ä½pH (ISO 787/9) 8 ä½Moisture Content (ISO 782/2) < 0.2 % ä½Whiteness (Wit. R íV 457) > 96.5 % ä½Whiteness (Wit. R íV 457) 150oC > 97 % ä½Mesh Size 700 Mesh. 50 kg. bags.
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