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 […]
alumina
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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 […]
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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 […]
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Rio Tinto has partnered with the Australian Renewable Energy Agency (ARENA) to study whether hydrogen can replace natural gas in alumina refineries to reduce emissions. Rio Tinto will conduct a A$1.2 million feasibility study, equally funded with ARENA through a A$580,000 grant, into using clean hydrogen to replace natural gas in the calcination process of […]
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The International Aluminium Institute (IAI) has released its annual global statistics for both primary aluminum and alumina production, covering the year 2020. The latest dataset is available on the IAI website. Primary Aluminum Production The IAI data shows that Covid-19 did not lead to a reduction in global aluminum production in 2020. Production in China […]
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Editor’s Note: On August 3rd, 1888, Austrian chemist Karl Josef Bayer working in Saint Petersburg, Russia was granted German patent 43977 for his invention involving a process for the production of aluminum hydroxide. At the time, his invention was used by the textile industry that made use of aluminum hydroxide as a dye fixative. Other […]
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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 […]