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Reduced CO2 emissions, thanks to optimized zinc fuming treatment of copper slag
In collaboration with Boliden, Swerim has successfully recreated a pilot-scale version of the fuming process at Boliden's Rönnskär smelter. A trial set-up will be used to optimize and improve the efficiency of the process in order to reduce the CO2 footprint.
Boliden works on an ongoing basis to improve the various processes used at their smelter, all in order to increase yields and minimize climate impact.
Better yield via coal injection
One of the processes used in the Rönnskär copper smelter is so-called zinc fuming, whereby zinc is removed from the slag from primary smelting via injection of coal and air. This process generates a significant share of Rönnskär's carbon dioxide emissions, something which Boliden will now remedy.
Less CO2 footprint, thanks to greater process efficiency
Johan Stenman, Swerim.
Swerim has conducted a series of trials to recreate the prevailing conditions in Boliden's process in pilot scale. The experimental set-up will be used to test which parameters can be adjusted in order to achieve better process efficiency and reduce the amount of coal used in the process.
"It's going to be very exciting to be part of this journey and contribute to a more sustainable industry," says Johan Stenman, research engineer at Swerim.