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Marble waste recycling: lime replacement for marble waste in synthetic DESULFURIZING slags

Grant number: 14/06916-0
Support type:Scholarships in Brazil - Master
Effective date (Start): September 01, 2014
Effective date (End): August 31, 2015
Field of knowledge:Engineering - Materials and Metallurgical Engineering
Principal Investigator:Jorge Alberto Soares Tenório
Grantee:Jorge Luís Coleti
Home Institution: Escola Politécnica (EP). Universidade de São Paulo (USP). São Paulo , SP, Brazil
Associated research grant:12/51871-9 - Study Center for Technology in Waste Solid Treatment and Recycling - SCTWSTR, AP.TEM


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.

Academic Publications
(References retrieved automatically from State of São Paulo Research Institutions)
COLETI, Jorge Luís. Use of marble waste and boron oxide in desulfurizing synthetic slags for steels.. 2015. Master's Dissertation - Universidade de São Paulo (USP). Escola Politécnica São Paulo.

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