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synthetic cryolite

Posting date : Apr 02, 2009

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CHEMICAL | Organic ch

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29-

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Synonym: Sodium fluoroaluminate Molecular formula: Na3AlF6 Molecular weight: 209.94 1> Properties: it is crystalline white powder. Slightly soluble in water, density 2.95-3, melting point 1000 o C, easily absorbing water and become damp, decomposed by strong acids like sulfuric acid and hydrochloride, then producing hydrofluoric acid and relevant aluminum salt and sodium salt. 2> Uses: mainly used in flux of electrolytic aluminum, pesticide, flux of ceramic colors, anti-rubbing filling agent of resin and rubber, electrolytic liquid for production of iron alloy rimmed steel and furnish of emery wheel. 3> Packing: package can be 25/50/ 1000kg plastic woven bags with shrink film, or according to customer's requirements. 4> Specifications: GB4291-1999 Ingredient Super First grade Second grade F%≥ 53 53 53 Na% ≥ 32 32 32 Al≥ 13 13 13 H2O%≤ 0.4 0.5 0.8 SiO2≤ 0.25 0.36 0.4 Fe2O3%≤ 0.05 0.08 0.10 SO4%≤ 0.7 1.20 1.30 P2O5%≤ 0.02 0.03 0.03 CaO%≤ 0.10 0.15 0.20 Ignite on 550oC≤ 2.5 3.00 3.00