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coltan mining in sierra leone 4 9 4426 Ratings The Gulin product line consisting of more than 30 machines sets the standard for our industry We plan to help you meet your needs with our equipment with our distribution and product support system and the continual introduction and updating of products
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Venezuela emerges as new source of 'conflict' minerals Black-market coltan likely making its way to high-tech manufacturers supply it s used in everything from smart phones to smart bombs By Emilia Diaz-Struck Joseph Poliszuk 2 00 am March 4 2012 Updated 12 19 pm May 19 2014 Miners weigh the stones with their hands to
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Coltan Facts Coltan What You Should Know What is Coltan Coltan is short for Columbite-tantalite a black tar-like mineral found in major quantities in the Congo The Congo possesses 80 percent of the world s coltan When coltan is refined it becomes a heat resistant powder that can hold a high electric charge The properties of refined
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coltan mining equipments 'Coltan' a term unique to Central Africa is an abbreviation of columbo-tantalite the name given to an ore containing both niobium and
