Bauxite is also called bauxite or bauxite. Its main component is alumina, which is a hydrated alumina containing impurities and is a kind of earthy mineral. White or off-white, brown or light red due to iron. Density 3.45g/cm3, hardness 1~3, opaque, crisp. Extremely hard to melt. Insoluble in water, soluble in sulfuric acid, sodium hydroxide solution. It is mainly used for aluminum smelting and refractories.
|
Grade
|
Al2O3 %
|
Fe2O3 %
|
TIO2 %
|
K2O+Na2O %
|
CaO+MgO %
|
Bulk density g/cm3
|
|
50-60
|
50-60
|
≤3.0
|
≤4.0
|
≤0.3
|
≤0.5
|
≥2.45
|
|
60-70
|
60-70
|
≤3.0
|
≤4.0
|
≤0.3
|
≤0.5
|
≥2.65
|
|
75
|
75min
|
≤3.0
|
≤4.0
|
≤0.3
|
≤0.5
|
≥2.70
|
|
80
|
80min
|
≤3.0
|
≤4.0
|
≤0.3
|
≤0.5
|
≥2.80
|
|
85
|
85min
|
≤2
|
≤4.0
|
≤0.3
|
≤0.5
|
≥3.00
|
|
86
|
86min
|
≤2
|
≤4.0
|
≤0.3
|
≤0.5
|
≥3.10
|
|
87
|
87min
|
≤2
|
≤4.0
|
≤0.3
|
≤0.5
|
≥3.20
|
|
88
|
88min
|
≤1.8
|
≤4.0
|
≤0.25
|
≤0.5
|
≥3.25
|
|
90
|
90min
|
≤1.8
|
≤4.0
|
≤0.25
|
≤0.5
|
≥3.30
|
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