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The Bayer process is the principal industrial means of refining bauxite to produce alumina (aluminium oxide) and was developed by Carl Josef Bayer. Bauxite, the most important ore of aluminium, contains only 30–60% aluminium oxide (Al2O3), the rest being a mixture of silica, various iron oxides, and titanium dioxide. The aluminium oxide must be further purified before it can be refined into aluminium.
Norsk Hydro ASA is a Norwegian aluminium and renewable energy company, headquartered in Oslo. It is one of the largest aluminium companies worldwide. It has operations in some 50 countries around the world and is active on all continents. The Norwegian state owns 34.3% of the company through the Ministry of Trade, Industry and Fisheries. A further 6.5% is owned by Folketrygdfond, which administers the Government Pension Fund of Norway. Norsk Hydro employs approximately 35,000 people. Eivind Kallevik has been the CEO since May, 2024, following Hilde Merete Aasheim.
Manapōuri Power Station is an underground hydroelectric power station on the western arm of Lake Manapouri in Fiordland National Park, in the South Island of New Zealand. At 854 MW installed capacity, it is the largest hydroelectric power station in New Zealand, and the second largest power station in New Zealand. The station is noted for the controversy and environmental protests by the Save Manapouri Campaign against raising the level of Lake Manapouri to increase the station's hydraulic head, which galvanised New Zealanders and was one of the foundations of the New Zealand environmental movement.
Vedanta Limited is an Indian multinational mining company headquartered in Mumbai, with its main operations in iron ore, gold and aluminium mines in Goa, Karnataka, Rajasthan and Odisha.
National Aluminium Company Limited is an Indian public sector company having integrated and diversified operations in mining, metal and power. Presently, the Government of India holds a 51.28% equity stake in NALCO, while the Ministry of Mines has administrative control over the company.
Aluminium recycling is the process in which secondary commercial aluminium is created from scrap or other forms of end-of-life or otherwise unusable aluminium. It involves re-melting the metal, which is cheaper and more energy-efficient than the production of virgin aluminium by electrolysis of alumina (Al2O3) refined from raw bauxite by use of the Bayer and Hall–Héroult processes.
Aluminium in Africa originates from bauxite, and within Africa is primarily found in Guinea, Mozambique and Ghana. Guinea is by far the biggest producer in Africa, and is a world leader in bauxite production.
United Company Rusal is the world's second largest aluminium company by primary production output. It was the largest until overtaken by China Hongqiao Group in 2015. Rusal accounts for almost 9% of the world's primary aluminium output and 9% of the world's alumina production. Rusal was founded by major Russian industrialist Oleg Deripaska.
METKA ATE is the business unit of the Greek company Mytilineos S.A., undertaking the construction of large-scale projects in the sectors of energy, infrastructure and defence.
Aluminium smelting is the process of extracting aluminium from its oxide, alumina, generally by the Hall-Héroult process. Alumina is extracted from the ore bauxite by means of the Bayer process at an alumina refinery.
Aluminium of Greece is an aluminium producing company in Greece. It was founded in 1960 by a conglomerate including French aluminium producer Pechiney. Its headquarters are in Marousi, Athens. Its production plant is located at Agios Nikolaos, near Distomo in Boeotia, on the north coast of the Gulf of Corinth. The site combines proximity to the large bauxite deposits of Boeotia and Phocis and sea transportation facilities, with unobtrusive integration into the surrounding area. The annual production capacity of this industrial complex is : 800,000 tonnes of alumina and 165,000 tonnes of aluminium.
The Tiwai Point Aluminium Smelter is an aluminium smelter owned by Rio Tinto Group (79.36%) and the Sumitomo Group (20.64%), via a joint venture called New Zealand Aluminium Smelters (NZAS) Limited.
En+ Group plc is a green energy and metals company. It has a controlling stake in Rusal, one of the world's largest aluminum producers outside of China. EN+ was founded by Oleg Deripaska
The mineral industry of Russia is one of the world's leading mineral industries and accounts for a large percentage of the Commonwealth of Independent States' production of a range of mineral products, including metals, industrial minerals, and mineral fuels. In 2005, Russia ranked among the leading world producers or was a significant producer of a vast range of mineral commodities, including aluminum, arsenic, cement, copper, magnesium compounds and metals, nitrogen, palladium, silicon, nickel and vanadium.
The second-largest mineral industry in the world is the mineral industry of Africa, which implies large quantities of resources due to Africa being the second largest continent, with 30.37 million square kilometres of land.With a population of 1.4 billion living there, mineral exploration and production constitute significant parts of their economies for many African countries and remain keys to economic growth. Africa is richly endowed with mineral reserves and ranks first in quantity of world reserves for bauxite, cobalt, industrial diamond, phosphate rock, platinum-group metals (PGM), vermiculite, and zirconium.
Torstein Dale Sjøtveit is a Norwegian business executive. Torstein is currently executive chairman of Freyr AS, a Norwegian company aiming at establishing a 32 GWh Giga factory for lithium battery cells in Mo I Rana Norway.
South32 Limited is a mining and metals company headquartered in Perth, Western Australia. It was spun out of BHP Billiton on 18 May 2015. It is listed on the Australian Securities Exchange with secondary listings on the Johannesburg and London Stock Exchanges.
Red mud, now more frequently termed bauxite residue, is an industrial waste generated during the processing of bauxite into alumina using the Bayer process. It is composed of various oxide compounds, including the iron oxides which give its red colour. Over 97% of the alumina produced globally is through the Bayer process; for every tonne (2,200 lb) of alumina produced, approximately 1 to 1.5 tonnes of red mud are also produced; the global average is 1.23. Annual production of alumina in 2023 was over 142 million tonnes resulting in the generation of approximately 170 million tonnes of red mud.
China Hongqiao Group Limited is a company founded in 1994 that specializes in the production of aluminium. Hongqiao is currently the second largest aluminium producer in the world after Chinalco. It is listed on the Hong Kong Stock Exchange with stock code 1378, and is incorporated in George Town, Cayman Islands.
Protergia is the biggest private company for the production and supply of electricity and natural gas in Greece. It is a subsidiary and is 100% owned by the Metlen Energy & Metals.
