Proceedings of the Ironmaking, Iron Ore and Agglomeration Seminars

Title

VALUE IN USE OF PASEK DUNITE IMPROVING THE RETURN SINTER FINES

Authorship

Arroyabe, tor Elorriaga Fernandez de; Rubio, Javier Martinez; Garcia, Pamela Diaz

Arroyabe, tor Elorriaga Fernandez de

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Rubio, Javier Martinez

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Garcia, Pamela Diaz

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DOI

10.5151/2594-357X-33158

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Abstract

The purpose of Sinter plants is to heat iron ore fines along with fluxes and coke fines or coal, to produce a semi-molten mass that solidifies into porous pieces of sinter with the needed size and strength. Fluxes used in the sintering process need to have an appropriate size distribution and TI to avoid generation of fines, which could reduce the productivity of the Sinter. Besides, a homogeneous chemical composition and high absorption characteristics are necessary to control the basicity and to combine the flux with P, S, Si, etc, respectively. PASEK Dunite is an ultramaphic rock exploited in the north of Spain with a basic chemical classification, being olivine and serpentine its principal minerals. It is a very homogeneous and hard stone and its main characteristics are: high hot and cold resistance to mechanical stresses, softening and melting points of a flux not of a refractory material. In addition, due to its mechanical and chemical properties, less fines are generated in the sintering process and during the handling and transportation to the blast furnace, improving the productivity of these processes. In this way, the use of PASEK Dunite allows increasing the homogeneity structure of sinter, reducing the percentage of return fines and improving the Sinter productivity.

Keywords

Fluxes; Dunite; Sinter; Return Fines; Magnesium Silicate