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Review of Calcium Carbonate Production in CIS Calcium carbonate CaCO3 occurs naturally as one of polymorphous modifications – calcite mineral. It is a common substance found in rocks (chalk, limestone and marble). In recent years, the total worldwide natural CaCO3 production capacity has been growing by 9% and today it is estimated at 80m tonnes. The world market of chemically obtained CaCO3 (precipitated calcium carbonate) in 2007 made up 13m tonnes.
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