Currently, there is a considerable increase in cement consumption, alongside a growing concern with environmental issues in the industrial process. In order to mitigate the impacts caused by the consumption of raw materials and CO2 emissions in the atmosphere, a laboratory study was conducted in which ladle furnace slag (LFS) from the steel industry was used in the manufacture of Portland cement clinker. The aim of this paper is to evaluate the quality of the clinker and CO2 emissions generated by adding ladle furnace slag (LFS) to the raw meal used in clinker production. Thermogravimetric analyses were performed to quantify the CO2 emissions generated by mixtures with and without LFS, based on the evaluation of their decomposition at increased temperatures. The clinkers produced were evaluated qualitatively by X-ray diffraction and optical microscopy. The results demonstrated that clinker produced with LFS had CO2 emissions 16,51% lower than those of the control clinker, made only with pure reagents. The results of the mineralogical analysis and optical microscopy in reflected light were satisfactory, showing evidence of improved raw mix burnability with LFS.
Portland cement clinker; Ladle furnace slag; CO2 emissions; Co-processed
