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Coltan mining and ethics Jump to navigation Jump to search Coltan and have spiked much higher in the past when supplies were scarce In 2006 Australia Brazil and Canada produced 80 of the world s and tin No standards are set or enforced for mining operations and devising safety procedures is the responsibility of mine operators
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Tantalum ores are recognized mainly in Australia Canada Brazil and central Africa with some additional quantities create in Southeast Asia and in China There is also anxiety in exploration for this element in a diversity of regions of the world such as Canada Egypt and Saudi Arabia
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Nov 28 2016 ethical and social issues surrounding the mining of columbite–tantalite coltan Coltan comes from three sources as a by product of tin slag 20 of supply tin mines recycling 30 of supply and mines 50 of supply in this order although historically Canada and Ethiopia have also been
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Coltan mining and ethics Coltan is a metallic and Malaysia The Thai and Malaysian coltan industries are based on tin mining of which coltan is a byproduct While these countries do have small coltan reserves they remain essentially untapped China China is Asia s largest coltan producer and the world s largest coltan refiner with at least a third of the world s coltan being
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NIOBIUM ORES Niobium mostly occurs as an oxide and in combination with tantalum Pyrochlore Na Ca 2Nb 2 O6F and columbite Fe Mn Nb Ta 2 O 6 are the major mineral ores of niobium which constitute niobate tantalate iron and manganese in definite proportions Pyrochlore usually occurs in carbonatites and in pegmatite derived from alkalic rocks combined with zirconium titanium
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