DROSRITE™ System: Salt-Free Recovery of Metal from Aluminium and Zinc Drosses
Aluminium and Zinc production is highly energy intensive, and as such the recycling of residues such as dross is very attractive economically and environmentally. However, in the case of Aluminium dross, the conventional recycling process using a gas or oil-fired RSF is thermally inefficient and environmentally unacceptable due to the resultant production of salt cakes and CO2. The generally acceptable alternative is to use, a more efficient air-plasma torch and graphite arc salt-free processes, but this process has its own drawbacks as it requires highly skilled operators and is capital intensive.
By contrast, PyroGenesis’ DROSRITE™ process is extremely energy efficient, extracting heat from energy in the process residue. As such, it does not require any external heat source such as a plasma torch, an electric arc or a gas or oil burner.
See the list of the DROSRITE advantages:
- Salt-free process
- Low capital cost
- Low operating cost
- Single operation
- High energy savings
- No residue (no salt cake)
- Up to 10% more metal recovery
- Dross skimming monitoring
- No inventory of dross
- Zn plant increased metal production
- Removal of chlorides in Zn residues
In addition to all of the above advantages, using DROSRITE also provides an extra bonus:
DROSRITE eliminates up to 1.4 tonne of CO2 which would be produced otherwise when using RSF to treat every tonne of Aluminium dross! The corresponding CO2 credit for a 10,000 tpa dross plant varies world wide but is an additional revenue stream not available from other technologies.
A portable DROSRITE system is available for demonstrating the benefits of this technology at your facility.