A number of valuable by-products such as sulfuric acid, iron silicate, selenium, and lead are produced during the smelting process at Aurubis.
When high-quality copper and copper products are produced from concentrates and recycling materials, additional products are also recovered at Aurubis. Some of them – such as iron silicate and selenium – are processed and sold at Aurubis subsidiaries. Sulfuric acid and lead are two products that are directly marketed by the Aurubis sites.