Copperbelt Katanga Mining African Copperbelt's Top Mining News. Breaking News. The DRC exported in the first half of 2021 a volume of million carats of diamonds for a value of 65 million USD. Outotec integrates finegrinding solutions into plant unit. Zambia mines minister takes aim at Konkola liquidation.
The process of producing cement and its followon product concrete are shown schematically in Fig. . The raw material, mainly limestone, is crushed in ball mills, passed through an electrostatic precipitator, stored, preheated, and reacted in a hightemperature rotary kiln which yields clinker.