In its mineral form Bauxite, Aluminium is the most abundant metal in the earth's crust. Bauxite contains one of a variety of hydrated aluminium oxides (gibbsite, boehmite or diaspore), which are often expressed as Al2O3xH2O but are more commonly regarded as impure Al2O3. Bauxite is claylike and earthy, and ranges in colour from white to deep brown or red according to the nature and quantity of its components. The major impurities in Bauxite are iron oxides (goethite & hematite), silicon dioxide, the clay mineral kaolinite as well as small amounts of anatase (TiO2). Consequently, its composition varies considerably with alumina constituting from about 50% to about 70%. Aluminium content can be accurately and precisely determined over a broad analytical range simultaneously along with Si, Fe, Mn, Ti, Zr and up to 20+ other elements. Item Specification Color: Brown, yellow / light red Granularity: 0-1/1-3/3-5/5-8 mm, 200/325 mesh Application: Aluminium/Precision Casting/Refractory Density: 4.3 g/cm3 Hardness: 1-3 Fe2O3 Content: 3.0% Max CaO Content: 0.2 Max Package: 25 kg/bag Payment terms: T/T L/C
Details Commodity: bauxite Grade: 42% to 45% max 45% . Grade commitment: 42%. Price: usd 41/- fob from dighi port (india) Quantity: 2, 00, 000 mt in current season. Advance: usd 1, 085, 000 against commitment of 200, 000, mt.
Bauxite Ores
Total Quantity: 100,000MT+ per month Origin: Guinea Payment terms: Letter of Credit Shipping terms: FOB Price: On request Inspection: Loading port by SGS or any other reputed agency Delivery: Monthly basis based on buyerâ??s request Product specs: Al2O3: 44% Min SiO2: 3% Max Fe2O3: 25% Max TiO2: 4% Max Free Moisture: 10% Max
Bauxite is an aluminium ore and is the main source of aluminium. This form of rock consists mostly of the minerals gibbsite Al(OH)3, boehmite ?-AlO(OH), and diaspore a-AlO(OH), in a mixture with the two iron oxides goethite and haematite, the clay mineral kaolinite, and small amounts ofanatase TiO2. Bauxite was named after the village Les Baux in southern France, where it was first recognized as containing aluminium and named by the French geologist Pierre Berthier in 1821. Bauxite Formation Lateritic bauxites (silicate bauxites) are distinguished from karst bauxite ores (carbonate bauxites). The early discovered carbonate bauxites occur predominantly in Europe and Jamaica above carbonate rocks (limestone and dolomite), where they were formed by lateritic weathering and residual accumulation of intercalated clays or by clay dissolution residues of the limestone. The lateritic bauxites are found mostly in the countries of the tropics. They were formed by lateritization of various silicate rocks such as granite, gneiss,basalt, syenite, and shale. In comparison with the iron-rich laterites, the formation of bauxites depends even more on intense weathering conditions in a location with very good drainage. This enables the dissolution of the kaolinite and the precipitation of the gibbsite. Zones with highest aluminium content are frequently located below a ferruginous surface layer. The aluminium hydroxide in the lateritic bauxite deposits is almost exclusively gibbsite.
Bauxite, rock largely composed of a mixture of hydrous aluminium oxides. Bauxite is the principal ore of aluminium. bauxite. Related Topics: ore laterite gibbsite boehmite diaspore. Gibbsite (alumina trihydrate), boehmite, and diaspore (alumina monohydrates) are the main ore minerals. Bauxite is a high-aluminum-content rock. Bauxite - Cement Grade Specification Parameters Percentage AL O : Min 36% Fe O : 34% SiO : 6% LOI : 20% Moisture 8% Size 0 to 100 mm Origin Maharashtra, India.
Parameters Percentage AlO Min 40 Humidity approx 8 FeO 10 24 SiO 6 14 TiO 8 12 Low Alkali Na2O 0658 K2O 060 Granulometry 0 100mm Origin Turkey
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