Residue recycling technologyMetallurgy
Ecological awareness and responsibility, increasingly stringent environmental regulations and the more and more critical supply of raw materials make the application of new metal recovery processes a priority. Today the steel industry produces by-products, which are not fully valued. One of them is the sludge produced by the wet gas cleaning system of the blast furnace, with a high lead and zinc content.
Taking up this environmental challenge, Paul Wurth developed the CIROVAL® technology, a hydrometallurgical process designed to selectively remove the zinc and lead in order to recycle the entire quantity of blast furnace sludge back to the blast furnace route.