一、Main features
The chemical composition of Rutile mainly includes: TiO2, 60% Ti, sometimes containing Fe, Nb, Ta, Cr, Sn, etc; Its name comes from the word 'Rulle'; From Latin Rutilus, it means red, which symbolizes the color of Rutile.
Its main characteristics are: identified by its square columnar shape, twin crystals, and color; It can be distinguished from cassiterite; Insoluble in acids, adding sodium carbonate for melting can dissolve in silicic acid. If hydrogen peroxide is added, the solution can turn yellow.
Because it was formed under high temperature conditions, it mainly occurs in rutile bearing quartz veins of Metamorphic rock series and Pegmatite veins. In addition, it occurs in Igneous rock as accessory minerals, and also in Gneiss in granular form; Due to its high chemical stability, Rutile often turns into placer after rock weathering.
Rutile, as a accessory mineral, occurs in granite, Pegmatite, Gneiss, mica schist, Eclogite and other rocks, as well as in Sedimentary rock or sediments in the form of detritus or placer ore. Rutile is mainly used to extract titanium and make white pigments.
二、Physical property data
White powder.
A soft, odorless and tasteless white powder with strong covering and coloring power, and a melting point of 1560~1580 ℃. Insoluble in water, dilute Mineral acid, organic solvents, oil, slightly soluble in alkali, soluble in concentrated sulfuric acid. When heated, it turns yellow, and when cooled, it turns white again. Rutile type (R type) has a density of 4.26g/cm3 and a refractive index of 2.72. R-type titanium dioxide has good weather resistance, water resistance, and resistance to yellowing, but its whiteness is slightly poor. The density of the acute titanium type (Type A) is 3.84g/cm3, and the refractive index is 2.55. Type A titanium dioxide has poor light resistance and is not resistant to weathering, but has a good whiteness. In recent years, it has been found that nanoscale ultra-fine titanium dioxide (usually 10-50 nm) has semiconductor properties, high stability, transparency, activity, and dispersion, non-toxic properties, and color effects.
三、Main purpose
Used in industries such as paint, ink, plastic, rubber, paper, chemical fiber, etc; Used for welding electrodes, extracting titanium, and manufacturing titanium dioxide. Titanium dioxide (nanoscale) is widely used in white inorganic pigments such as functional ceramics, catalysts, cosmetics, and photosensitive materials. It is one of the strongest coloring agents among white pigments, with excellent covering power and color fastness, suitable for opaque white products. Rutile type is especially suitable for outdoor plastic products, which can give products good light stability. The sharp titanium type is mainly used for indoor products, but with a slight blue light, high whiteness, strong covering power, strong coloring power, and good dispersibility. Titanium dioxide is widely used as a pigment in paints, paper, rubber, plastics, enamel, glass, cosmetics, inks, watercolors, and oils, as well as in metallurgy, radio, ceramics, and welding electrodes
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