|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||REWAS 2022: Recovering the Unrecoverable
||Recovery of Copper, Iron and Alumina from Metallurgical Waste by Use of Hydrogen
||Casper Van Der Eijk, Halvor Dalaker
|On-Site Speaker (Planned)
Substituting carbon with hydrogen is one of the few ways metal production can potentially become truly free of CO2 emissions. Moreover, the metallurgical industry produces significant amounts of waste. The present work presents a circular concept that is based on increasing waste recovery by the use of hydrogen in two example cases: bauxite residue and copper smelter slags. The common theme is to use hydrogen to selectively reduce iron and copper, making it possible to extract these metals. Through a series of pyro and hydrometallurgical steps, as well as mechanical separation, it is also possible to recover secondary valuables like alumina, molybdenum, cobalt, nickel, zinc and scandium. The final remaining residues can be valorised as building materials for a truly zero-waste concept. The project is a cooperation between 4 universities, 5 companies and one research institute. It is funded by the EU through the Horizon 2020 program.
||Aluminum, Copper / Nickel / Cobalt, Recycling and Secondary Recovery