Overview of cryolite: Cryolite is a mineral, sodium hexafluoroaluminate (Na3AlF6), white monoclinic system (109 degrees Celsius), slightly soluble in water. Molten cryolite can dissolve alumina, which is used as a flux in electrolytic aluminum industry and as a shading agent in the manufacture of ivory glass and enamel. Cryolite is a halide mineral, which is sodium aluminum fluoride. Colors range from colorless and transparent to white, but also light brown, reddish and brick red. Glass luster to grease luster. Cryolite has many metallurgical uses, and can also be used in many other fields, such as glass and ceramic manufacturing, grinding, pesticides and so on. Cryolite, molecular formula Na3AlF6, or 3NaF. AlF3 is a double salt of sodium fluoride and aluminum fluoride. Mainly used as flux for aluminum electrolysis, wear-resistant filler for rubber and grinding wheel, opacifier for enamel, opacifier for glass and metal flux. In addition to the above sodium cryolite, there are potassium cryolite (K3AlF6) and lithium cryolite (Li3AlF6). Potassium and lithium cryolite have not found suitable industrial use, so cryolite generally refers to sodium cryolite. Natural cryolite is usually monoclinic and transforms into tetragonal crystal at 565℃~600℃. Most of them are dense and granular, with specific gravity of 2.9~3.0 and hardness of 2.5~3.0 and 3.5~4.0, depending on their crystallization. Artificial cryolite is a white powdery crystal with a specific gravity of 2.95~3.0, a hardness of 2~3 and a melting point of about 1000℃. The west coast of Greenland is the main producing area of cryolite, which was mined in 1987. At present, sodium hexafluoroaluminate for industrial use is artificially synthesized from fluorite. The scientific name is sodium fluoroaluminate, also known as sodium cryolite, or cryolite for short. The molecular formula of physical and chemical properties of 1. cryolite, with molecular weight of 209.94, is a complex or double salt, which is white, off-white, yellow powder or crystalline particles due to impurities, with melting point of 1025℃, bulk density of 0.6~ 1.0g/L and true density of 2.95 ~ 3. Second, it 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 the wear resistance, machinability and cutting force of grinding wheels and prolong the service life and storage time of grinding wheels; Fluxes for ferroalloys and boiling steel, fluxes for nonferrous metals, deoxidants for casting, catalysts for olefin polymerization, emulsifiers for glass antireflection coatings, enamels, opacifiers for glass, fluxes for welding materials, fillers for ceramic industry, pesticides and other industrial enterprises. Third, application advantages: 1, compared with cryolite electrolyte, the polymer used in the new start-up tank has the advantages of more stable liquid level, slower shrinkage and gentle change of molecular ratio, which is conducive to the stable maintenance of electrolyte components; The cathode absorbs sodium evenly, which is beneficial to prolong the service life of the electrolyzer; The electrolysis temperature is reasonable, the change is small, and it is easy to control; The volatilization loss is less, which can effectively improve the field operation conditions. 2, the dosage of sodium fluoride or soda ash can be greatly saved, and the production cost can be reduced. 3. The adding method is simple and easy to operate. Four. Quality implementation standard GB/4291-1999 Grade Chemical Composition% Super Grade (A) Grade I (B) F53 53al1313Na 32 32 SiO 2 0.25 0.36 Fe2O3 0.05 0.08 SO 4&; Sup20.71.0p2o5 0.020.03H2O 0.40.5 Loss on ignition (550℃) 2.5 3.0. The product code is B03 10240 1, and the product CAS registration number is 13775-53-6. In addition to industrial cryolite, there is also a special cryolite for abrasives on the market, which is mainly suitable for the abrasive/flux industry, and the product is pure white powder. Not suitable for electrolytic aluminum, 30% customer feedback in welding industry will produce smoke. This product was first developed by Kunming Songhai Trading Co., Ltd. and popularized in the market, which occupies a certain position in grinding wheel enterprises at home and abroad.

High molecular weight cryolite

Standard sample

Features:

1, the polymer ratio is stable between 2.8 and 3.0; High main content, low impurity content and high yield. 2. Compared with cryolite electrolyte, the polymer used in the new start-up tank has the advantages of more stable level, slower shrinkage and gentle change of molecular ratio, which is beneficial to the stable maintenance of electrolyte components; The cathode absorbs sodium evenly, which is beneficial to prolong the service life of the electrolyzer; The electrolysis temperature is reasonable, the change is small, and it is easy to control; The volatilization loss is less, which can effectively improve the field operation conditions. 3, the dosage of sodium fluoride or soda ash can be greatly saved, and the production cost can be reduced. 4. There are three states: sandy (80 mesh), powdery (200-325 mesh) and granular (0- 10mm).

-Powdered cryolite (200-325 mesh)

This product is especially suitable for slotting electrolytic aluminum, and also suitable for wear-resistant filler of resin grinding wheel, metal flux glass opacifier, enamel opacifier and so on. When in use, the adding method is simple and easy to operate.

Sandy cryolite (80 mesh)

Sandy cryolite is developed by many fluoride salt experts and electrolytic aluminum experts, and has national patent technology. The products have been tested by the National Light Metal Quality Supervision and Inspection Center, and all the performance indexes have reached or exceeded the national standard of cryolite. The product has the characteristics of low melting point and fast melting speed. The time for entering the normal working state can be shortened. Sandy cryolite has large particles and good fluidity, most of which are concentrated in 240 -80 mesh, which is convenient for mechanized and automatic blanking.

-granular cryolite (0 0- 10/0mm)

Mainly used as a flux for aluminum electrolysis, especially suitable for slotting and normal production of aluminum electrolysis. High output 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 blanking. This product is a new generation of environmental protection products developed by polyfluoride company according to the requirements of the international market for cryolite. Polymer cryolite is a new product independently developed by polyfluoride company, which is listed as a national high-tech product.

Ordinary cryolite

Product features:

1, and the molecular ratio can be adjusted arbitrarily between 1.0-2.8. 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. There are three states: sandy (80 mesh), powdery (200-325 mesh) and granular (0- 10mm), and products with different particle sizes can be provided according to users' requirements. The application differences of products in different states are as follows:

-Powdered cryolite (200-325 mesh)

This product is mainly used as flux for aluminum electrolysis, and also suitable for wear-resistant filler of resin grinding wheel, metal flux glass opacifier, enamel opacifier, etc. When in use, the adding method is simple and easy to operate.

Sandy cryolite (80 mesh)

Sandy cryolite is developed by many fluoride salt experts and electrolytic aluminum experts, and has national patent technology. The products have been tested by the National Light Metal Quality Supervision and Inspection Center, and all the performance indexes have reached or exceeded the national standard of cryolite. The product has the characteristics of low melting point and fast melting speed. The time for entering the normal working state can be shortened. Sandy cryolite has large particles and good fluidity, most of which are concentrated in 240 -80 mesh, which is convenient for mechanized and automatic blanking.

-granular cryolite (0 0- 10/0mm)

This product is a new generation of environmental protection products developed by polyfluoride company according to the requirements of the international market for cryolite. Mainly used as flux for aluminum electrolysis. High output 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 blanking.