Integrated recycling of non-ferrous metals at boliden ltd. Ronnskar smelter

摘要

The Ronnskar smelter has wide experience inthe field of recycling of non-ferrous metals. Today,smelting and refining from primary and secondary rawmaterials are integrated in a complex flow sheet.Boliden operates a lead flash smelter, a lead refinery,a copper smelter and refinery ,a sulphuric acid andsulphur dioxide plant ,a slag fuming plant and preciousmetal plant at its Ronnskar smelter in the North ofSweden. The Business Area Smelter Operations alsoincorporates Boliden Bergsoe, Sweden's lead-acidbattery recycler, and Norzink, Norway, where recycledzinc accounts for more than 20% of it's production. Rawmaterials for the Ronnskar smelter include concentrates,ashes, slags, metallic scrap, electronic scrap andelectric arc furnace (EAF) steel-making dust. This paperbriefly decsribes current operations and illustratescurrent measures to improve productivity. Limits torecycling as experienced by a non-ferrous smelter areillustrated. The deportment of critical elementscontained in raw materials is also discussed.