Abstract: A method of separating different constituents of a fine fraction that is produced in a prior method for separating a concrete for deconstruction. The method allows the reuse of these different constituents in the production of a new cement and/or of a new concrete, the fine fraction including sand and at least 30% by mass of hydrated cement paste.

Abstract: A method of separating different constituents of a fine fraction that is produced in a prior method for separating a concrete for deconstruction. The method allows the reuse of these different constituents in the production of a new cement and/or of a new concrete, the fine fraction including sand and at least 30% by mass of hydrated cement paste.

Abstract: Disclosed is a clinker production plant including: a preheating unit; a calcination unit; a kiln; and a cooler. The calcination assembly includes a calcination reactor for calcination by combustion of a solid so-called alternative fuel. The calcination reactor is arranged such that at least part of the combustion fumes from the kiln pass partly through the calcination reactor before entering the preheating unit, and a tertiary gas flow including air leaving the cooler passing at least in part through the calcination reactor before entering the preheating unit. The calcination reactor includes a system for controlling the residence time of the alternative solid fuel.