Synthetic (Sodium) Cryolite (Sodium Fluoroaluminate)
1. Basic indicators
Molecular formula: | Na3AlF6 |
Cas No.: | 15096-52-3 |
Appearance: | White, off-white, yellow powder or granular |
H.S Code: | 28263000 |
2. Technical specifications
Grade | Chemical Composition (%) |
F | Al | Na | SiO2 | Fe2O3 | SO42- | CaO | P2O5 | H2O |
≥ | ≤ |
CH-1 | 52 | 12 | 33 | 0.36 | 0.08 | 1.0 | 0.20 | 0.03 | 0.40 |
CM-1 | 53 | 13 | 32 | 0.36 | 0.08 | 1.0 | 0.60 | 0.03 | 0.40 |
The size distribution can be sandy (80mesh), powder (200mesh, 325mesh), granular (0-10mm). Other items can be specified according to special requirement. |
3. Application
Aluminium- metallurgy: as component of fluxing agents, protective and refining salts
Production of abrasives: as active filler in resin bonded abrasives for metal treatment
Production of enamel, glazing frits and glass: as flux and opacifying agent
Production of soldering agent: as component for fluxing agents
Production of welding agents: as component of welding rod coatings and welding powders
Blasting and pyrotechnics: for fireworks
Metal surface treatment: as component in pickling pastes for stainless steel
4. Packing and storage
Packing: Double coated plastic woven bag, 25 / 50kg net; 1000kg jumbo bags.
Storage: Dry, ventilated, moisture proof.
六氟铝酸钠（冰晶石）
冰晶石又名六氟合铝酸钠或氟化铝钠，分子式为Na3AlF6，白色细小的结晶体，无气味，溶解度比天然冰晶石大，比重为3，硬度2~3，熔点1009摄氏度，易吸水受潮。冰晶石主要用作铝电解的助熔剂，橡胶、砂轮的耐磨填充剂，搪瓷乳白剂，玻璃遮光剂和金属熔剂，农作物的杀虫剂等。Hall—Heroult法是用冰晶石为基的氟化物熔体作溶剂的以生产金属铝的方法，迄今为止还没有发现另一种化合物可以代替冰晶石的。这是因为冰晶石除了能够溶解氧化铝以外还具有其它一些不可缺少的性质，如不含比铝更正电性的元素，稳定性好，在一般条件下不分解、不挥发、不潮解，熔点高于铝，导电性好，节约电量等。
