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Reddish-brown bauxite Bauxite with US penny for comparison QEMSCAN mineral maps of bauxite ore-forming pisoliths. Bauxite (/ ˈ b ɔː k s aɪ t /) is a sedimentary rock with a relatively high aluminium content. It is the world's main source of aluminium and gallium.
Bauxite forms by the weathering of aluminum-rich and silica-poor rocks in hot, humid, climates, at places with good drainage. Under the proper conditions, weathering disintegrates the aluminium silicate minerals, and dissolves and removes the silica, creating bauxite. The mined US bauxite deposits have all been in the southeastern United States.
Reynolds Metals created the first high-speed, gravure-printed foil, aluminum bottle labels, heat-sealed foil bags for foods and foil-laminated building insulation paper. In 1940, Reynolds Metals began mining bauxite (aluminum ore) in Bauxite, Arkansas, and opened its first aluminum plant near Sheffield, Alabama, the following year. In 1947, the ...
The US imported nearly all the bauxite (the only commercial aluminum ore) used in producing primary aluminum. For years, the US has produced less than 1% of the bauxite used to make aluminum. The US also imported 33 percent of the aluminum that was used in 2014. Of the imported aluminum, 63% came from Canada. [1] [19]
Bauxite is a raw material used primarily in the production of aluminium. The bauxite ore is refined into alumina before being smelted into aluminium. [3] Australia is known for its high-grade ore, especially in the Weipa and Gove deposits. [2] The quality of bauxite ore is determined by its available alumina (Al 2 O 3) content.
Boehmite or böhmite is an aluminium oxide hydroxide (γ-AlO(OH)) mineral, a component of the aluminium ore bauxite. It is dimorphous with diaspore. It crystallizes in the orthorhombic dipyramidal system and is typically massive in habit. It is white with tints of yellow, green, brown or red due to impurities.
The company bought out the local producers of the ore, including the General Bauxite Company. Pittsburgh Reduction would go on to incorporate as the Aluminum Company of America , or ALCOA. Production of the ore rose rapidly, growing from 200,000 short tons (180,000 t) in 1914 during World War I , to 560,000 short tons (510,000 t) by war's end ...
Alumina is extracted from the ore bauxite by means of the Bayer process at an alumina refinery. This is an electrolytic process, so an aluminium smelter uses huge amounts of electric power; smelters tend to be located close to large power stations, often hydro-electric ones, in order to hold down costs and reduce the overall carbon footprint ...