Telge Återvinning
Customer case: Ragn-Sells Heljestorp
Progress in metal recycling through unique cooperation
By applying extremely high magnetic forces, it is now possible to sort out small and weakly magnetic particles such as precious metals from slag ash.
- "Now we can sort out metals such as aluminum, zinc, lead and even precious metals such as gold and silver from even the finest fractions, which means that the recycling rate increases," says Bernt Jansson, section manager at Ragn-Sells.
Bernt Jansson from Ragn-Sells in Heljestorp.
Ragn-Sells' Heljestorp treatment plant is located outside Vänersborg and handles large amounts of slag ash from boilers. For several years, Norditek and Ragn-Sells have worked in close and long-term cooperation to develop the handling of slag ash. Slag gas is a residual product from the nearly 300 plants in Sweden that supply electricity and district heating. The ash from the incineration of waste and biofuel often contains large amounts of metals.
The collaboration between Norditek and Rang-Sells is behind the new opportunity to increase the recycling rate of precious metals from ash, which brings potentially large environmental benefits.
Maximizing the recovery rate from slag ash
When Norditek delivered an eddy current separator to Heljestorp, the recovery rate for slag ash could be further increased. The eddy current separator then became part of a unique overall solution by providing the process with an opportunity to extract metals from even the finest fractions.
- "Now we can sort out metals such as aluminum, zinc, lead and even precious metals such as gold and silver from even the finest fractions, which means that the recycling rate increases," says Bernt Jansson, plant manager at Heljestorp.
Previously, metals could not be extracted from fractions below three millimeters, but thanks to the new eddy current separator, this is now possible.
Norditek has also supplied the previous technology, which has now been supplemented with the new eddy current, enabling a maximized recycling rate.
Long-term cooperation
The goal of the long-term work has been to constantly increase the recycling rate of metals. - In order to get the most out of Our technology, long and frequent dialogues are needed, and Ragn-Sells has really invited this, says Daniel Carlberg.
An estimated 1.2-1.4 million tons of bottom ash is produced annually from the approximately 40 plants in Sweden that burn mixed waste, and this ash contains 10-15% magnetic metals and 1.5-2% non-magnetic metals. The new technical solution for extracting metals therefore represents an important potential for recycling.
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