Tungsten Ore(10%) Mining and Processing to Tungsten Ore(65%) in Nigeria-I
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- Category: Tungsten Information
- Published on Monday, 17 August 2015 17:47
Tungsten, also known as wolfram, is a chemical element with symbol W and atomic number 74. The word tungsten comes from the Swedish language tungsten directly translatable to heavy stone.
Tungsten is a grayish-white lustrous metal, which is a solid at room temperature. Tungsten has the highest tensile strength. It has excellent corrosion resistance and is attacked only slightly by most mineral acids.
Tungsten(W)is a metal with a wide range of uses, the largest of which is as tungsten carbides in cemented carbides. Cemented carbides(also called hardmetals)are wear-resistant materials used by the metalworking, mining, and construction industries.
Tungsten metal wires, electrodes, and/or contacts are used in lighting, electrical, electronic, heating, and welding applications. Tungsten is also used to make heavy metal alloys for armaments, heat sinks, and high-density applications, such as weights and counterweights; superalloys for turbine blades; tool steels; and wear-resistant alloy parts and coatings.
Tungsten composites are used as a substitute for lead in bullets and shot. Tungsten chemical compounds are used in catalysts, inorganic pigments, and high-temperature lubricants.
Global tungsten demand has increased on average by 2.7% per annum since 2008, although estimates suggests that this will slow to 2.6% per annum in the years to 2018 as its direct use in lighting applications diminishes.
Representing 12% of total demand in 2013, tungsten used in lighting applications is forecast to decline by around 5% per annum in the year to 2018. the drop-off in demand is caused by the replacement of incandescent bulbs by fluorescent and LED bulbs in both industrial and domestic applications. On a positive note, however, these new lighting products require greater volumes of refractory tungsten alloys indirectly in their manufacture, boosting demand in the alloy sector.
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