The current market requires steel industries best quality steels through processes that cause less impact to the environment. The main barrier to the quality of Brazilian steels is due to little knowledge, if compared to the large steel players in the refining process, especially in the preparation of synthetic slag. Thus, in this work, the objective is to recycle the waste generated in the marble production by applying it in the steel production line as a slag component. The study will involve the replacement of the lime as usual applied, by the marble waste, which has in its composition a great amount of CaO and some MgO, that cause less wear in the reactors' refractory material. The materials used will be characterized using the following techniques: chemical analysis, particle size analysis, specific surface area, X-ray diffraction, scanning electron microscopy (SEM ) and analysis of micro-regions by EDS . Synthetic slags have been formulated in order to check the efficiency of each on the desulfurization. These mixtures were added in a bath of steel at 1600° C and that the variation of S content was studied over time.
News published in Agência FAPESP Newsletter about the scholarship: