Latest developments in recycling aluminum dross and scrap using tilting rotary furnaces
The latest developments in aluminum recycling using tilting rotary furnaces (TRF) taking as
reference a new 30 000 TPY secondary plant in France.
plant is equipped with two 12 tonne TRF for melting general commercial scrap and a 7.5 tonne TRF
marily used for melting aluminium dross together with two 30 tonne refining/holding furnaces, swarf dyer,
ting equipment and automated ingot stacker. The paper also compares the new plant with the owner’s
inal plant that is equipped with traditional fixed axis rotary furnaces (FARF).
ckground history: The SNR company was founded about 40 years ago on a site 50 km to the west of
is in St Arnoult. The plant is equipped with:
3 fixed axis rotary furnaces. Unit capacity: 7,500kg. Melting under salt bath
1 Holding/refining furnace: Capacity: 20,000 kg
1 linear ingot casting machine: Capacity: 6,000 kg/h
1 Swarf dryer: capacity 2,000 kg/h
The annual production capacity at St Arnoult is at present approximately 15,000 tonnes and each shift
operates with 11 people. The plant specialises in gravity and pressure die alloys.
It is impossible for a company to remain ‘static’ even in (some would say especially in) the present
economical climate and the SNR company took the decision to increase their production volumes
considerably to meet a very strong demand from the automotive sector.
The company could not grow further on their original site and so after 3 years of research, reflection
and equipment comparisons SNR took the decision to locate their second aluminium refinery at
Prémery, 250km south of Paris, on a ‘brownfield’ site previously operated by Bostik (the glue
manufacturers). SNR have invested 7 million euros in the new plant.
The company’s objectives in giving itself the opportunity to design a plant on a ‘clean sheet’ were:
to create a coherent, high performance production tool
to be able to process the whole range of commer