Synthetic Cryolite For Casting | 15096-52-3

Cryolite is used in casting at present. Cryolite is also especially used in the production of ductile iron. The main instructions are as follows:

1. Sprinkle on the surface of molten iron, the amount is 0.1% -0.3%, and its role is to remove slag and cover all.

Cryolite can dilute the slag so that it can be collected and removed.

Cryolite decomposes when heated (more than 1011℃) to generate aluminum fluoride (AlF3) gas, which can protect the surface of molten iron and prevent oxidation, but this gas is harmful to the human body.

2. The surface of the wet cavity is covered with cryolite powder, which effectively prevents the occurrence of subcutaneous pores.

After the pouring, there is a cryolite melt layer on the metal-mold interface, which can dissolve the water vapor reduction reaction at the interface, which reduces the base required for hydrogen evolution in the interface molten iron layer to form the bubble core;

The aluminum fluoride gas produced by the decomposition of the lower cryolite can protect the interfacial ferroelectric layer from different chemical reactions at the interfacial layer, preventing the interfacial ferromagnetic layer from absorbing hydrogen.

Cryolite physical properties: sodium hexafluoroaluminate, molecular formula Na3AlF6, molecular weight is 209.94, belongs to complex, it is impossible to be double salt, Na + ion and [AlF6] 3- ion exist after dissolution.

Non-toxic, white, off-white, yellow powder or crystalline particles due to impurities, its melting point is 1025℃, bulk density is 0.6 ~ 1.0g / L, true density is 2.95 ~ 3.05g / cm3, heat generation is 225KJ,

The specific gravity is 2.75 ~ 3.00g / cm3, the heat of fusion is 107KJ, colorless monoclinic crystals, the appearance is almost cubic, and the pure product is colorless. It is usually off-white, light yellow, light red, and black due to impurities.

It is often a dense block that is not suitable for division. Its luster is transparent and moist, its stripes are white, and it has a glass luster.

Easily absorb water and moisture, slightly soluble in water, the aqueous solution is acidic, and it releases toxic HF gas when it meets sulfuric acid.

Generally used as a flux for aluminum smelting, pesticides for crops, as a flux for ceramic glazes, and as an opalescent agent; it is also used to produce opalescent glass, and it can also be used as an electrolyte for the production of aluminum alloys, iron alloys, and boiling steels, and for grinding wheels, Ingredients etc.

Package: 25KG/BAG or as you request.

Storage: Store at a ventilated, dry place.

Executive Standard: International Standard.