392 



Fig. 7. 



Another possibility' is this that the Just inentioned intersection 

 does take phice in the stable region, and tlien the situation of tlie 

 lines is represented in fig. 8. ') 



Fig. 8 



It will be pretty easy to decide experimentally which of these 

 two tignres represents what really takes place. We will draw the 

 attention on the fact that the transition point of iron is intensionally 

 not considered here. 



The Blast- Furnace Process. 



What precedes gives time a snrvey of the three-phase lines and 



1) It is clear that when FejOa and FejOi become miscible above a definite 

 temperature in all proportions, the line for FegO^ +- Fe203 + G ends abruptly. 



