This paper presents results of laboratory investigations on the technological behavior of the raw mix containing slag steel (a non-carbonated waste) as a partial substitute of clay, compared with typical raw mix (containing limestone, clay and pyrite cinder). It followed the influence on the grindability and burnability of the two raw mixtures and the characteristics of obtained clinkers. Also, were estimated theoretical heat consumption and CO₂ emissions generated by the formation of the two clinkers. Finally, it assessed the influence of steel slag on physical and mechanical properties (water demand, setting time, soundness, compressive strength) of cement obtained by grinding clinker with gypsum up to o fineness of approx. 3500 cm²/g as compared with reference cement. The presence of steel slag introduced in the raw meal promoted better raw mix burnability. Being a non-carbonated source of lime (it contains calcium oxide bonded as silicates and alumino-silicates forms), it allows a reduction of both thermal requirement and emission of CO₂ at clinker manufacture.