Potassium fluoaluminate (potassium cryolite) plays a role in the aluminum and aluminum processing industry.

In the smelting process of aluminum and aluminum alloy, to prevent the oxidation of melt and remove inclusions, it is often achieved by adding fluxes.
The former is to melt the surface and a layer called the flux of covering agent, a layer with a certain thickness is formed after melting the density of the liquid layer, can prevent oxygen infiltration, to prevent the oxidation of aluminium, significantly reduce burning loss;
Which is adding a certain amount of refining agent to melt, they can make the inclusions such as Al2O3 with aluminum melt separation and floating in the melt slag formation and be able to remove above, and they can absorb a certain amount of hydrogen in the melt, so have a dual role of removing impurity to hydrogen refining agent.
The coating agent and the refining agent of aluminum and aluminum alloy melt are mainly composed of chlorine salt and fluorine salt.

With elpasolite (aluminum fluoride acid potassium), make the aluminum melt with the increase of the interfacial tension between flux and the flux of volatile and hygroscopicity, cover more close-grained, and refining capacity to a certain extent, so it has good covering, separation, refining the integrated process performance, widely used in addition to the high content of magnesium alloy aluminium and aluminium alloy.