Internal recycling of magnesium scrap

Clean feeders can be directly melted in the melting furnaces. Because of oxides and other inclusions, the possible amount of recycling is limited. Specialised equipment for exact analytical and metallographical control is necessary. 

Here the scrap is treated and recycled at a separate recycling-plant on-site at the foimdry. Two techniques may be applied  

Fluxless re-melting Re-melting of Mg scrap under a covering gas in a hearth type furnace applicable only to class 1 scrap. Advantages are the low additional investment and low energy consumption 

Salt re-melting Re-melting of Mg scrap under a salt cover. Is applicable to the processing of all scrap classes except used fluxes and sludge (not treated). If only class 1 - 2 scrap is used, HP (high purity) magnesium alloys may be produced. 

Both techniques can be used to produce Mg-ingots or molten metal for liquid charging. 

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