Zambia Exports of coke, semi-coke of coal, of lignite, of peat; retort carbon to South Africa was US$346 during 2009, 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 South Africa - data, historical chart and statistics - was last updated on May of 2024.