Melting and casting units

Copper and copper alloys are generally melted in crucible furnaces. These furnaces generally operate within the following ranges  

Medium frequency induction furnaces are also used with silica or alumina linings. 

All data per tonne of casting sold, data in kg unless stated differently  

For copper alloys, the amount of particles emitted greatly depends on the zinc content of the alloys. As a guide the values in Table 3.30 show the relationship between the quantity of particles emitted and the zinc content. 

The production of refractory waste is 8 - 9 kg/tonne of molten metal for induction melting and 7.5 kg/tonne of molten metal for oil-fired hearth type furnaces. 

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