High sodium molecular ratio Cryolite hexafluide for Metal 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.
It is mainly used as a flux in the aluminium 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 aluminium alloy casting; And in the
production of ferrous alloy and effervescing steel.
1. MF : NaF
2. CAS NO. : 7681-49-4
3. Mol wt : 41.99
4. Appearance : white crystal or powder
5. HS Code : 2826192010
Specification for Industrial Grade :
Items Industrial Grade
Content ( NaF ) 98% min
Water Insoluble Matters 0.70% max
Free Acid ( HF ) 0.10% max
Free Alkali ( Na2CO3 ) 0.50% max
Sulfate ( SO4 ) 0.30% max
Silicate ( SiO2 ) 0.50% max
Moisture ( H2O ) 0.50% max
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It is a white crystalline powder or a sandy size granularity as
Properties:still named sodium fluoaluminate. It is a white crystalline powder
or a sandy size granularity as well. Melting point about 1000ºC. It
is insoluble in anhydrous hydrogen fluoride, but slightly in water.
Uses: It is mainly used as a flux in the aluminium 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 aluminium alloy casting;and in the production of
ferrous alloy and effervescing steel.
Packing: 25kg/woven bags with inner plastic lining, or as the request of
CHEMICAL COMPOSITION (%)
Loss on Drying(500~550°C,1h)
Package can be 25/50/1000kg plastic woven bags with shrink film, or
according to customer’s requirements.
The size distribution can be sandy (80mesh~100mesh), powder
(200mesh~325mesh), granular (0~10mm).The molecular proportion can
be specified (during 1.0~3.0) according to special requests.Other
items can be specified according to special requirement.