The World Bank-supported mining legislation was introduced to attract investment into copper and cobalt projects from global miners including Glencore Plc, Freeport-McMoRan Inc. and China Molybdenum Co. Gécamines claims country has not benefited from it.
China told the WTO it would stop accepting certain types of foreign solid waste, including metals, in 2018 if they didn't meet stricter impurity thresholds.
Zinc hit its highest in more than a decade on Friday as concerns over market tightness persisted, while copper hit a two-week low as Chinese investor interest was muted with the Lunar New Year holidays looming.
