202463 · The Democratic Republic of the Congo is among the world's richest countries in natural resources. An estimated US$24 trillion worth of mineral deposits remain untapped, including the world's largest coltan and cobalt reserves; 74 % of the world's cobalt comes from Congolese mines. This silvery blue metal is used inter alia to produce lithium …
view more2007423 · In this article, we have updated and extended the refinery investment cost curves presented in Gary and Handwerk’s “Petroleum Refining: Technology and Economics.
view more2016925 · When prices for coltan rose to a height in November 2000, the rebels installed a monopoly to siphon off all revenue of the coltan exports in their area, providing them with the necessary resources to finance their war. In some cases, the army even brought in political prisoners to dig the coltan for them.
view moreColtan is a mixture of columbite and tantalite, both valuable tantalum ores. Useful in capacitors throughout history for many high tech and electronic devices. Category. Minerals. Produced by. Mining. Consumed by. Refinery. Avg sell price.
view more201234 · It's used by almost everybody in smart phones and consumer electronics, and there is no simple way to keep conflict coltan out of the stream of legitimate minerals used by manufacturers.
view more2018130 · As coltan mining is not predominantly industrial scale in Africa, there remains significant, easily accessible supplies of tantalite bearing ores on the continent. Artisanal mining in the Africa coltan industry is currently a very cost-efficient system for extracting this mineral.
view moreSee a map of which countries and learn about under what conditions coltan, tungsten and tin are reportedly produced with forced and/or child labor.
view moreBased on over 30 years' experiences in design, production and service of crushing and s
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