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Nigeria: World Bank Approves $150 Million to Enhance Mining .Apr 14, 2017 . The World Bank's Board today approved a $150 million credit to enhance the contribution of the mining sector to the Nigerian economy.animasi conical ball millmethod of mining in nigeria,Mining in Nigeria: overview | Practical LawMay 1, 2015 . This article highlights some of the key legal issues commonly associated with the exploration and extraction of mineral resources in Nigeria.