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Boehmite requires > 240°C for digestion. Diaspore requires the highest temperatures of all, 260–280°C. Digestion temperatures are due to the chemistry of the hydrated aluminas. Gibbsite is a trihydrate, and the OH bonds are relatively weak. Boehmite is an oxy-hydroxide, which is a much stronger bond.
In this study, we present the main findings from microstructural and mineralogical studies and their implications for the genesis of bauxite/laterite in Mainpat plateau. Megascopic studies showed reddish laterite to off-white bauxite. Strong hydrolytic action formed small oolites and large pisolites with sizes of 1–2 cm in diameter. Pisolites …
Bauxite Photos and Premium High Res Pictures - Getty Images. 1,166 Bauxite Premium High Res Photos Browse 1,166 bauxite stock photos and images available, or search for bauxite mine or bauxite mining to find more great stock photos and pictures. Related searches: bauxite mine bauxite mining bauxite mineral bauxite tailings bauxite ore of …
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Bauxite (Fig. 1.33) is formed by surface weathering of clay rocks around the tropical region and composer of aluminum oxide (Al (OH) 3 ). It contains 15%–25% aluminum and only ore used for commercial extraction for aluminum. The bauxite occurs as near-surface layers and usually mixed with clay minerals, iron oxide, and titanium dioxide.
Bauxite minerals (gypsum, Al2O3.3H2O; boehmite, Al2O3.H2O; diaspore, Al2O3.H2O) are formed by various geological conditions and geometric configurations. In general, they are observed as residual deposits of weathering products formed on or close to the surface of the earth under tropical or subtropical weathering conditions. Bauxite deposits have …
baux·ite / ˈbôksīt / • n. an amorphous clayey rock that is the chief commercial ore of aluminum. It consists largely of hydrated alumina with variable proportions of iron oxides. DERIVATIVES: baux·it·ic / ˌbôkˈsitik / adj. The Oxford Pocket Dictionary of Current English bauxite views 1,726,919 updated Jun 08 2018 bauxite XIX. — Fr., f.
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