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Production of Aluminium Fluoride

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2019/12/17 13:45
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   Aluminium fluoride (AlF3) is an inorganic compound used primarily in the production of aluminium. This colorless solid can be prepared synthetically but also occurs in nature as minerals rosenbergite and oskarssonite.

   Aluminium fluoride is the chemical compound with the formula AlF3. It has the consistency of a white powder. AlF3 is refractory, in strong contrast to the other halides of aluminium.

   Adding aluminium fluoride to the production process of primary aluminium lowers the consumption of electricity required in the smelting process and there by considerably contributes to the reduction of production costs of aluminium. Aluminium producers (smelters) are the main users of aluminium fluoride.

   Aluminium fluoride is used in many industrial processes. It is one of the minor constituents added to the electrolytic cells during the production of metallic aluminium. Aluminium fluoride is used in turning alumina into aluminium.

Produces high-density aluminium fluoride through the following process:

1.fluorspar (CaF2) reacts with sulphuric acid (H2SO4) in externally heated rotary kilns, generating hydrofluoric acid (HF) gas and calcium sulphate (CaSO4);

2.the HF reacts with dry aluminium hydrate Al(OH)3 in five fluidised bed reactors to produce high density aluminium fluoride.

   Aluminium fluoride is available in bulk (silo trucks or bulk vessels) or bagged in 1 MT big bags, 1.5 MT big bags, 15, 25 or 50 kg paper bags on pallets.

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