Inert and neutral mineral residue is minimised and ready to be reused or disposed of, thus minimising pollution to air, water and soil. No additional impurity removal or precipitation stages are needed. In recent studies, the alkaline leach process has also shown reduced environmental impact compared with other technologies, Metso says. Based on the Life Cycle Impact Assessment, the process can provide an up to 40-60% reduction in water consumption, as well a reduction in the acidification and eutrophication impact. The compact process also minimises plant footprint and embedded carbon, according to Metso.
