200 mesh cryolite sodium aluminum fluoride CAS 15096-

52-3 for flux

Sodium fluoroaluminate is a white crystalline powder or a sandysize granularity, and

a pinkish crystalline powder or a sandy-size granularity as well. Sp. Gr.

2.95_3.01g/cm3, melting point about 1000° C, specific heat 1.056j/g° C at 18_100°

C. 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 800° C will appear 10.34%, 6.22% and 2.56%

when the molecular ratio reaches 1.74, 2.14 and 2.63 reactively.

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.2.953.01g/cm3, melting

point about 1000C, specific heat 1.056j/gC at 18100C. Its 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

800C will appear 10.34%, 6.22% and 2.56% when the molecular ratio reaches

1.74, 2.14 and 2.63 reactively.

Its 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.