Synthetic Cryolite/Sodium Aluminum Fluoride /Cryolite Bath/ Sodium Cryolite
Cas NO.: 13775-53-6
Appearance : white crystalline powder or a sandy-size granularity
Packaging : In 25kg/50kg plastic woven bag lined with high pressure polyethylene plastic bag
Minimum Order : 20ton
Shipping Port : TIANJIN

Product's Description
Cas NO.: 13775-53-6
Appearance : white crystalline powder or a sandy-size granularity
Packaging : In 25kg/50kg plastic woven bag lined with high pressure polyethylene plastic bag
Minimum Order : 20ton
Shipping Port : TIANJIN
Introduction:physical characteristics: The product is a white crystalline powder or a sandy-size granularity, and a pinkish crystalline powder or a sandy-size granularity as well. Sp.gr.2.95—3.01g/cm3, melting point about 1000 centigrade, specific heat 1.056j/gcentigradeat 18—100centigrade. It’s slightly soluble in water, but insoluble in anhydrous hydrogen fluoride. The content of its crystal water will be decreased while the increasing of the molecular ratio, therefore its loss on ignition will be also decreased while the increasing of the molecular ratio. After the paste of synthetic cryolite with different molecular ratio dehydrates, the loss on ignition at 800centigrade will appear 10.34%, 6.22% and 2.56% when the molecular ratio reaches 1.74, 2.14 and 2.63 reactively.The size distribution can be sandy (80mesh), powder (200mesh, 325mesh), granular (0-10mm). Other items can be specified according to special requirement.
Specification:
Molecular Formula Na3AlF6 Molecular Weight 209.94
Properties It is a colorless monoclinic crystal, but often appears off-white, pompadour, straw yellow or black due to impurities. It has relative density of 2.9-3.0, mp 1000. It is slightly soluble in water, and its aqueous is acidic. It decomposes to release poisonous HF gas while meeting sulfuric acid.
Usages It’s mainly used as a flux in the aluminum smelting by fused-salt electrolysis; also an opalizer in the manufacture of enamel; an opacifier and auxiliary solvent of glass and enamel; an insecticide of crops; a flux in aluminum alloy casting; and in the production of ferrous alloy and effervescing steel; as well as a wear-resistant filler for resin and rubber-boned abrasive wheels.
Specification Parameter Superfine Grade1 Grade2
Fluorine (F) ≥ 53 53 53
Aluminum (Al) ≥ 13 13 13
Sodium (Na) ≤ 32 32 32
Silicon Oxide (SiO2) ≤ 0.25 0.36 0.40
Ferric Oxide (Fe2O3) ≤ 0.05 0.08 0.10
Sulfate (SO42-) ≤ 0.7 1.2 1.3
Calcium Oxide (CaO) ≤ 0.10 0.15 0.20
Phosphorus Pentoxide (P2O5) ≤ 0.02 0.03 0.03
Water (H2O) ≤ 0.4 0.5 0.8
Ignite on 550oC≤ ≤ 2.5 3.0 3.0
Packing In 25kg/50kg plastic woven bag lined with high pressure polyethylene plastic bag.