Potassium Aluminium Fluoride (PAF) Potassium Aluminium Fluoride is an inorganic salt used in numerous industrial applications. PAF is also known as: Potassium Cryolite, Potassium Tetrafluoraluminate, Kalium Aluminium Fluorid, KAlF, KAlF4/K3AlF6 Potassium Aluminum Fluoride is a commercial purity fused inorganic salt. It has useful properties and is used in a number of industrial applications. The compound is used as salt flux in the smelting of � secondary aluminium to maximize metal recovery, to reduce or remove the magnesium content of liquid aluminium alloys and as filler in the manufacture of abrasives. PAF is also present  in additives  for the metals industry  as a fluxing agent to accelarate  dispersion after addition.