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Patent US6491751 - Method for manufacturing cement using a raw .
Dec 10, 2002 . A method is provided for manufacturing cement from a raw material mixture which . supplying the mixture of raw materials to a raw mill; .. 21, Broyage, "High Efficiency Vertical Mills For Cement Clinker and Slag," Ciment, . on Slag, National Institute for Transport and Road Research, South Africa, Feb.