Low-temperature oxyfuel combustion technology is uniquely designed for the challenges that exists within the aluminium industry to boost capacity, with uniform furnace temperatures to avoid hot spots, reduce fuel consumption, improve yields and reduce emissions. The combustion occurs under a diluted oxygen concentration by mixing the furnace gases into the combustion zone. This slows down the oxyfuel combustion reactions and results in lower flame temperatures, comparable to those of airfuel technology, which are below the point at which thermal NOx is created.
The mixing of furnace gases into the flame also disperses the energy throughout the entire furnace for uniform heating and more efficient melting. The dispersed flame contains the same amount of energy but with a much more effective distribution. The overall result is more homogenous heating and melting, enabling not only a higher power input and thus higher melt rates, but also reduced formation of dross and NOx emissions.