Study of the intrinsic properties of iron ores and additions in order to develop rational rules for composition of blends
The mineralogy and principal structures encountered in the rich minerals used at present in Europe are described, together with the classical structure of the principal types of strata. Detailed analyses of the ores most representative of the European market are given (chemical analysis, grain-size distribution, mineralogy and description of structures). The attention of the user is drawn to possible fluctuations in deliveries of the same ore and to the sometimes significant variations in the proportions of phases within different grain-size classes in the same ore. Different easily quantifiable parameters are defined for the granulation potential, which permit ores to be compared. Having described the material transport mechanisms which control granulation, two models are presented for the prediction of the cold permeability of the blend. It is shown that the combination of ores chosen allows the achievement of correct granulation and a blend with better permeability than that of the basic constituents taken in isolation. A laboratory method for the measurement of the reducibility of larger particules of ore is described. Softening and fusion of the constituent materials of the sinter blend are studied.
Bibliographic Reference: EUR 11460 FR (1988) MF, 140 pp., ECU 8, blow-up copy ECU 17.50
Record Number: 198910299 / Last updated on: 1994-12-01
Original language: fr
Available languages: fr