Molten aluminium refining have performed for alkali, hydrogen and inclusion removal in the holding furnace. The chlorine gas used for molten aluminium refining makes the environment worse, therefore, the use of it tends to reduce globally. Recently solid fluxes have been applied in a cast house as the chlorine gas free technique. This report has described the physical and chemical properties of various solid fluxes and these components, also has explained for the removal mechanism of alkali, hydrogen and inclusion. The refining performance of solid fluxes was compared with the conventional chlorine gas injection. By using of solid fluxes, the high refining performance and the reduction of emissions by one order of magnitude are accomplished.
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