Zambia Imports of niobium, tantalum, vanadium or zirconium ores and concentrates from Congo was US$3.48 Thousand during 2022, according to the United Nations COMTRADE database on international trade. Zambia Imports of niobium, tantalum, vanadium or zirconium ores and concentrates from Congo - data, historical chart and statistics - was last updated on May of 2024.