The Smelting of Titaniferous Iron Ores 49 



the ore in the proportions in which they would appear in the slag, if 

 self-fluxing. Ores I, II and III were sampled by Mr. Pope only across 

 those parts of the deposits that did not include any large proportion of 

 rock-forming crystals and it is probable that by including some of the 

 marginal phase of the deposits, the proportions of the slag-forming 

 ingredients can be adjusted to suit exactly the requirements of the slag. 

 If these determinations of self-fluxing ores should prove on more 

 extended trial, to be correct, there will be a new field opened for the 

 prospecting and development of titaniferous iron ore. The marginal 

 parts of these ore deposits are known to merge gradually into rock in 

 many cases, and in some cases on record these marginal rocky parts 

 greatly exceed in tonnage the parts composed of pure titano-magnetite 

 or ilmenite. Where this self-fluxing ore reaches 40 per cent, in iron, 

 the furnace burden will be equal to or higher than the average North 

 American blast-furnace burden in iron content. It seems probable 

 that some of these deposits will provide an pre of self-fluxing composition 

 that will run considerably over 40 per cent, in iron. 



CONCLUSIONS 



The data and speculations set forth above have led to the following 

 conclusions: 



1. There has been demonstrated the use, in the electric furnace, of 

 a slag consisting essentially of titania, silica and alumina, whereby 

 titaniferous iron ores can be satisfactorily reduced to pig-iron. 



2. The smelting temperatures are not above those in use with the 

 ordinary iron blast-furnace. 



3. It is not yet proved that this process is applicable to the blast 

 furnace, but the evidence up to the present shows that this will be the 

 case. 



4. The experiments to date show that there is a considerable range 

 of composition through which this slag can be usefully employed; but 

 the limits have not yet been determined. 



5. The use of this slag seems particularly adaptable to titaniferous 

 ores that are high in silica, and consequently self-fluxing. There are 

 large deposits of this class of ore with a suitably high iron content, that 

 have up to the present been considered as of no immediate or prospective 

 value. 



6. It is recommended that the temperature-viscosity relations of this 

 slag be studied by means of the method devised by the United States 

 Bureau of Mines, as an aid in effecting chemical control of the smelting 

 operation. 



Kingston, May 15th, 1920. W. M. Goodwin. 



