Zambia Exports of coke, semi-coke of coal, of lignite, of peat; retort carbon to Congo was US$376.07 Thousand during 2022, according to the United Nations COMTRADE database on international trade. Zambia Exports of coke, semi-coke of coal, of lignite, of peat; retort carbon to Congo - data, historical chart and statistics - was last updated on May of 2024.