Cryolite

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℃, 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. 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

Ignite on 550℃ ≤

2.5

3.00

3.00

CaO% ≤

0.10

0.15

0.20

冰晶石(氟铝酸钠)

1) 分子式：Na3AlF6
2) 分子量：209.94
3) 性质：

冰晶石是一种结晶性的白色粉末。微溶于水，密度2.95～3，熔点约1000℃，易吸水受潮，能被硫酸、盐酸等强酸分解，生成氢氟酸和相应的铝盐和钠盐。

4) 用途：

主要用于电解铝的助熔剂，农作物的杀虫剂，搪瓷釉药的助熔剂，树脂、橡胶的耐磨填充剂，铁合金沸腾钢生产的电解液及砂轮的配料等。

5) 技术指标：执行国家GB/T4291-1999标准

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
Ignite on 550℃ ≤	2.5	3.00	3.00
CaO% ≤	0.10	0.15	0.20