The Smelting of Titaniferous Iron Ores 



43 



Hardwood charcoal, as prepared by the Standard Chemical, Iron 

 and Lumber Co. was used as reducing agent. It analysis was assumed 

 to be that of the average hardwood charcoal, with 1 per cent, or less of 

 ash.^ 



To provide a basis for charge calculations, some slags that had proved 

 satisfactory in former tests were analysed, with results as follows. 

 These tests had been run in an empirical way, without a complete 

 analysis of the materials used. 



Slags from Former Tests 



FeO 



SiOa 



CaO 



MgO 



AI2O3 



TiOa. 



MnO. 



C... 



98.02% 98.47% 



The furnace charge was simply calculated as below. The amount of 

 ash in the charcoal was taken as too small to be considered under the 

 circumstances. It will be noted by reference to the analyses of slags 

 produced from this charge as determined later that they approximate 

 fairly closely to the slags as calculated. 



Fe 



Si02 



CaO 

 MgO 

 AI0O3 

 TiOa 



100 lbs. Ore 

 Contains 



48.27 lbs. 



7.40 



3.42 



4.73 



5.81 

 11.80 



In Pig Iron 



47 lbs. 

 5.3 



Remainder in 

 Slag 



1.6 lbs. (FeO) 



2.1 



3.4 



4.7 



5.8 



11.8 



20 lbs. 

 Sand 



13.8 

 2.1 

 0.5 

 1.6 



Total in 

 in Slag 



1.6 lbs. 

 15.9 



5.5 



5.2 



7.4 

 11.8 



47.4 lbs. iOO.O% 



Composi- 

 tion of 

 Slag 



3.4% 

 33.5 

 11.6 

 11.0 

 15.6 

 24.9 



^Johnson, J. E., as above, page 50. 



