Abstract: A method for producing multi-component cements with the following procedural steps: one component B of the multi-component cement is ground in a grinding installation MB; Portland cement is ground as component A in a cement grinding installation MA; the mechanically discharged grinding stock of the grinding installation MB is supplied to the inlet of a dynamic classifier with adjusted separation cut; the Portland cement is also supplied to the inlet of the dynamic classifier of the grinding installation MB, and the oversized material of the dynamic classifier of the grinding installation MB is recycled to the inlet of the grinding installation MB, whereas the fine product of the dynamic classifier forms the multi-component cement.

Abstract: A method for the production of Portland slag cement and blast furnace cement by two-step grinding, comprising the following steps: a) Portland cement clinker is charged into a first mill for preliminary grinding, the cement mill (24), b) the delivery material of the cement mill is supplied directly and/or via an intermediate reservoir into the inlet of a dynamic classifier, c) slag meal or slag grit is additionally supplied into the inlet of the dynamic classifier, d) oversized material discharged from the dynamic classifier is supplied for pulverising into the inlet of a second mill, e) the delivery material of the second mill is fed into the inlet of the dynamic classifier, and f) sulphate carrier is supplied either to the first mill, to the inlet of the dynamic classifier or to the inlet of the second mill, and g) the fine material of the dynamic classifier is supplied to a reservoir.