44 Transactions of the Royal Canadian Institute 



Products of Runs 



It was found that by observing reasonable precautions the above 

 charge smelted satisfactorily in the electric furnace used, producing 

 ordinary grades of pig-iron and fluid slags. Four runs have been made 

 and the products analysed. The slag and pig-iron from the first run 

 are number Gl and G2 respectively; G3 (slag) and G4 (iron) from the 

 second run and so on. In the fourth run (samples G7 and G8) the charge 

 was fed too rapidly into the furnace with the consequence that the 

 crucible was chilled and only an imperfect separation of iron and slag 

 took place, part of the reduced iron, including a small amount of slag, 

 remaining "frozen" on the bottom of the furnace after pouring, and a 

 small percentage of "sponge metal" remaining in the slag, as indicated 

 in anajysis G7, where a normal amount of the ferrous oxide determined is 

 recorded as such and the remainder of the iron assumed to be in the 

 metallic state. 



Analysis of Slag from Runs 



102. 3%o 



(a) Average iron blast-furnace slag, after Bradley Stoudhton.^ 



(b) Average iron blast furnace slag, after Feild & Royster.^ 



(c) Slag from Mclntyre furnace, Adirondacks.* 



In the above table the composition of regular blast-furnace slag and 

 of the slag produced in a typical and successful commercial operation 

 with a titaniferous ore, are given for comparison. It will be noted that 



iStoughton, Bradley. — "Metallurgy of Iron and Steel," 1908, p. 37. 

 *Feild & Royster. — "Slag Viscosity Tables for Blast-furnace Work." — as above, 

 p. 17. 



'Rossi, A. J., as above. 



