Scrap recyling furnaces

Multi-chamber furnaces with integrated fume treatment facilities and heat recovery to preheat the input material are supplied to the secondary aluminium industry. The systems are suitable for recycling contaminated aluminium in an environmentally sound manner, meeting or exceeding the strictest clean air legislation also with respect to dioxine emissions. Charging can take place at three places in this particular furnace:

Ingot materials to establish the molten metal heel at start-up or to correct alloys or enhance melt rate can be charged on the dry ramp in the heating chamber where the burners are installed, baled or loose light gauge scrap can be charged to the enclosed side well chamber where-as small scrap pieces such as edge trimmings, punch scrap, chips etc. can be charged in the charge well.

Metal circulation between the chambers is either by an electromagnetic pump or a mechanical pump to suit every particular application and budget. Charging to the side well chamber can be by a special charging machine that seals entirely against the furnace so that no fumes can escape into the building whilst charging and all fumes are processed in the integrated thermal oxidizing system and subsequently are vented to the atmosphere via the fume filtration plant.

Furnace melt rates can be up to 10 tons per hour depending on charge mix and bath contents (typically between 50 and 100 tons of liquid metal).