Pc. Pistorius et Wf. Van Der Vyver, Significance of pressure, temperature and reaction rate events in a blast furnace simulation test, ISIJ INT, 40(11), 2000, pp. 1067-1072
The condition of iron ore samples in blast furnace simulation rests accordi
ng to the REAS procedure was determined by interrupting the test at differe
nt stages close to the maximum in the pressure drop across the sample bed.
While the onset of the pressure increase does agree with liquid formation (
melting of fayalite), the increase in the pressure drop appears to be relat
ed to sample compaction (softening). Elimination of pores formed by reducti
on (rather than lubrication by liquid) appears to be the main factor affect
ing compaction. The first strong temperature arrest is not associated with
melting of the slag phase, but rather with the onset of (endothermic) direc
t reduction.