CAS#13775-53-6 (Cryolite) has a molecular formula of Na3AlF6 and is a white crystalline powder manufactured from fluorite, sulfuric acid, aluminum hydroxide and sodium carbonate. CAS#13775-53-6 (Cryolite) is used to replace natural cryolite minerals. Natural cryolite is very rarity, and it has almost depleted.

Similar terms:

sodium fluoaluminate, sodium aluminum fluoride, sodium fluoroaluminate, trisodium hexafluoroaluminate, sodium hexafluoroaluminate, sodium aluminofluoride, aluminum sodium fluoride, kryolith, kryocide, ice spar.

Cryolite CAS No. 15096-52-3 / Species
According to the ratio of its sodium fluoride to aluminum fluoride, cryolite can be divided into high molecular weight cryolite and low molecular weight cryolite. Most of the electrolytic aluminum plants in China use low-molecular-weight cryolite with a molecular ratio of 1.8 to 2.2 as the electrolyte for aluminum electrolysis. Since the use of high molecular weight is superior to low molecular weight cryolite in environmental protection and economic benefits, China’s electrolytic aluminum plants are generally beginning to use polymer cryolite as the electrolyte for aluminum electrolysis. Cryolite can be divided into sand-shaped cryolite, granular cryolite and powdered cryolite according to its physical properties.

Cryolite CAS No. 15096-52-3 / Cryolite
A, the characteristics of sand-shaped cryolite are:
1.Low melting point, fast melting speed, can shorten the time to enter normal working state.
2.Molecular ratio can be adjusted in a larger range, can adapt to different requirements of the ratio of cryolite molecules in different periods of electrolytic cell.
3.Low water content, low fluorine loss.
4.Granular, good fluidity, conducive to transportation;
5. Easy to obtain raw materials, low production costs.
B, the characteristics of granular cryolite are:
1.Good fluidity, dust pollution, suitable for mechanized blanking.
2.High yield in electrolytic production, can reduce the cost of electrolytic aluminum.
3.Molecular ratio between 2.5 and 3.0, especially suitable for the opening of electrolytic aluminum.
4.Particles Mostly 1~10mm.
C, the characteristics of powdered cryolite are:
1.Can achieve higher particle size, usually more than 200 mesh;
2.Molecular ratio can reach 1.75~2.5, with good adjustability;
3. Ultra-fine products, 325 mesh pass rate is 98% or more, can meet special industries requirements for cryolite.

Cryolite CAS No. 15096-52-3 / Polymer ratio
1. The molecular ratio is high and can be stabilized between 2.8 and 3.0; the main content is high, the impurity content is low, and the actual yield is high.
2. The use of polymer in the new start-up tank has the advantages of smoother level, slower shrinkage, and gentle change of molecular ratio than the cryolite electrolyte, which is beneficial to the stable maintenance of the electrolyte component; uniform absorption of sodium by the cathode is beneficial to prolong the life of the electrolytic cell; Small, easy to control; less volatile loss, can effectively improve on-site operating conditions.
3. It can save a lot of sodium fluoride or soda ash and reduce production costs.
4. The state has three types of sand (80 mesh), powder (200-325 mesh), and granular (0-10 mm).
Granular cryolite (0-10mm): mainly used as a flux for aluminum electrolysis, especially suitable for electrolytic aluminum opening and normal production.

1. The molecular ratio can be arbitrarily adjusted between 1.0 and 2.8.
2. The main content is high and the impurity content is extremely low, which is suitable for the normal production of aluminum electrolysis and can partially replace AlF3 for aluminum electrolysis production.
3. The state is sand (80 mesh), powder (200-325 mesh), granular (0-10mm), and can provide different particle size products according to user requirements. The differences between different state product applications are as follows:

Powdered cryolite (200-325 mesh)
This product is mainly used as a flux for aluminum electrolysis, and is also suitable for wear-resistant fillers for resin grinding wheels, metal flux glass sunscreens, enamel whitening agents, and the like. The method of adding when using is simple and easy to operate.

Sandy cryolite (80 mesh)
Sand-shaped cryolite, which is made by national patent technology, has been jointly developed by many fluoride salt experts and electrolytic aluminum experts. The product has been tested by the National Light Metal Quality Supervision and Inspection Center, and all performance indicators have met or exceeded the national standard for cryolite. The product has the characteristics of low melting point and fast melting speed. Can shorten the working time. The sand-like cryolite particles are large and have good fluidity. Most of the particles are concentrated in 240 mesh-80 mesh, which is convenient for mechanization and automatic cutting.

Granular cryolite (0-10mm)
This product is a new generation of green environmental protection products developed by Polyfluoropoly Company according to the requirements of cryolite in the international market. Mainly used as a flux for aluminum electrolysis. The high yield in electrolytic aluminum production can reduce the cost of electrolytic aluminum; it has the advantages of good fluidity and no dust pollution, and is suitable for mechanized cutting.

Cryolite CAS No. 15096-52-3 / The main purpose
Natural production is sparse and usually manufactured by hand. The utility model is mainly used as a flux for aluminum electrolysis; it is also used as an anti-wear additive for grinding products, which can effectively improve wear resistance, cutting, cutting force, prolonging the service life and storage time of the grinding wheel; flux of ferroalloy and boiling steel, non-ferrous metal Flux, cast deoxidizer, olefin polymerization catalyst, and emulsifier for glass anti-reflective coating, enamel emulsifier, glass opalescent agent, flux filler for ceramics, pesticides for pesticides, etc.

Cryolite CAS No. 15096-52-3 / Industrial quality requirements
Cryolite is the largest used in the aluminum industry. The annual consumption in the world is about 700,000 tons. In 1999, the market sales volume of Chinese cryolite was about 130,000 tons. As a flux for electrolytic aluminum smelting, cryolite must meet certain requirements in terms of sodium-to-aluminum molecular ratio, impurity content, and water content.
First, the ratio of sodium to aluminum in cryolite should be as high as possible. The higher the molecular ratio, the higher the current efficiency of electrolytic aluminum smelting, the less the fluorine loss, the smaller the environmental pollution, and the higher the polymer cryolite is suitable to industries other than the aluminum industry
Secondly, the content of impurities such as silicon oxide, iron oxide and phosphorus pentoxide in cryolite is low. The presence of these impurities directly affects the quality of aluminum ingot and the current efficiency of aluminum smelting.
Third, the water content of cryolite should also be as low as possible, and the presence of water will increase the consumption of cryolite.
Product Name: Sodium Fluoroaluminate / Synthetic Cryolite
CAS No.:159096-52-3
Mol File:159096-52-3mol Na3AlF6 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. Na3AlF6’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.
Na3AlF6 is also known as sodium hexafluoroaluminate or sodium aluminum fluoride. Its molecular formula is Na3AlF6, white fine crystal, odorless, solubility is larger than natural cryolite, specific gravity is 3, hardness is 2~3, melting point is 1009 degrees Celsius, easy to absorb water. Get wet. Na3AlF6 is mainly used as a flux for aluminum electrolysis, a wear-resistant filler for rubber and grinding wheels, an enamel whitening agent, a glass sunscreen and a metal flux, and an insecticide for crops. The Hall-Heroult method is a method in which a cryolite-based fluoride melt is used as a solvent to produce metal aluminum. To date, no other compound has been found to replace cryolite. This is because Na3AlF6 has other indispensable properties besides being able to dissolve alumina, such as elements that do not contain more positive electrical properties than aluminum, and are stable.
Good in nature, does not decompose under normal conditions, does not decompose, does not deliquesce, melting point is higher than aluminum, good conductivity, saving electricity, etc.


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