CEMENT MANUFACTURING IN RWANDA

• Quarrying and crushing stage Primary raw material for cement manufacture is calcium carbonate (limestone) quarrying limestone crushing limestone CIMERWA • Obtained from the quarry first, removal of overburden then, rock is blasted loaded into trucks and transported to the crusher • A multistage crushing process reduces the rock to stone less than 25mm in diameter • About 1.5 tons of limestone is needed to produce one ton of cement cement storage and prehomogenization of raw material process-technology clinker storage pulverized coal kiln D secondary additives cement mills ■mining iron ore sand filter preheating pulverized coal calcination-burning raw meal to clinker cooling cement storage raw mill PPC raw meal homogenization cement dispatch bags bulk bulk bulk/bags 18

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