By Alton Tabereaux, Contributing Editor. Bauxite residue is an insoluble solid waste by-product generated after the digestion of gibbsitic bauxite ore with sodium hydroxide at elevated temperature and pressure in the Bayer process for the extraction of alumina. During the digestion process, aluminum minerals react with caustic soda process liquor to form soluble sodium aluminate […]
Hydro’s Alunorte alumina refinery signed a contract with Wave Aluminium to build a plant in Brazil that will work to address the challenges of bauxite residue — also known as red mud. The new plant will process bauxite residue, aiming to recover commercially valuable materials. Bauxite residue is generated after the bauxite ore has been processed […]
The International Committee for Study of Bauxite, Alumina and Aluminium (ICSOBA) announced that its 40th International Conference and Exhibition will be held in Athens, Greece, on October 10–14, 2022. As a hybrid event, delegates will be able to access presentations online. The host sponsor will be Mytilineos, which owns and operates Aluminium of Greece, the […]
Hydro has developed and implemented a new method for the final disposal of bauxite residue (also known as red mud), which the company has been testing at its Mineração Paragominas bauxite mine in the northern state of Pará, Brazil. This pioneering technology, called Tailings Dry Backfill, replaces the need for raising and building new dams […]
In 2015, China produced just over half of the world’s aluminum and its demand for bauxite has been increasing year-on-year, according to a report from Roskill Information Services. Following Indonesia’s decision to implement a ban on the export of unprocessed ores, China turned to Malaysia in an attempt to fill the void in its bauxite […]
