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Abstract

The aim of this research is to improve the heat consumption of a sintering mix consisting of Lorraine ores and highgrade ores at the rate of 15 to 25% by a lowering of the sintering temperature without affecting the quality level of the sinter. The method followed deviates from conventional operating procedures. By a modification of the grain size of the ore components of the mix to a greater fineness and by means of the appropriate combination of different size ranges of the ores, it is attempted to lower the sintering temperature. Laboratory tests focussing upon the mechanisms of the granulation process of material particles emphasise the positive aspects of the greater fineness of the ores, especially of the Lorraine ores because of their particular bonding and thermo-chemical properties. Potgrate sintering tests show that the stepwise reduction from 12 mm to 2 mm of the mesh size for grinding and screening of the ores composing a standard mix generates extensive modifications of the sintering characteristics: - decrease of productivity; - reduction of heat consumption, particularly pronounced with fine grained mixes; - improvement of the cold strength and especially of the reducibility of the sinter. It is demonstrated that the lowering of the heat consumption is a consequence of the decreased level of the sintering temperature.

Additional information

Authors: HOFMANN P, ARBED Recherches, Esch-sur-Alzette (LU);DIDERICH G, ARBED Recherches, Esch-sur-Alzette (LU)
Bibliographic Reference: EUR 12977 FR (1990) 80 pp., FS, ECU 7.50
Availability: (2)
ISBN: ISBN 92-826-1726-2
Record Number: 199011769 / Last updated on: 1994-12-02
Category: PUBLICATION
Original language: fr
Available languages: fr