Hydrogen reduction of bauxite residue and selective metal recovery Ganesh Pilla, Stergi V. Kapelari, Tobias Hertel, Bart Blanpain, Yiannis PontikesDepartment of Materials Engineering, KU Leuven, Kasteelpark Arenberg 44, 3001 Leuven, Belgium Abstract: Bauxite residue (BR) is an industrial by-product generated during the production of alumina from bauxite ores in the Bayer process. BR is environmentally […]
Recovery of Copper, Iron, and Alumina from Metallurgical Waste by Use of Hydrogen Abstract: Substituting carbon with hydrogen is one of the few ways metal production can potentially become free of CO2 emissions. Moreover, the metallurgical industry produces significant amounts of waste. The present work presents a circular concept that will be pursued in the HARARE […]
Hydrogen as reductant – What does that mean? Metals exist in the earth’s crust mainly as oxides. It means that every metal atom is attached to one or more oxygen atoms. They form very strong bound, like a marriage. To break these bounds, we need a reductant to steal the oxygen atoms from the metal atoms. Normally carbon is used […]
Let’s talk about Red Mud (Bauxite Residue) Global annual production of red mud (bauxite residue) is about 150 million tonnes. It contains raw materials for the production of iron, silicon and aluminium, and is dumped as waste in spite of the availability of recycling technologies. This is because it is cheaper to dump bauxite residue as […]