154 NEW YORK STATE MUSEUM 



The Lake Sanford ores carry about 15 per cent Ti0 2 on the 

 average. They are probably the most regular in titanium content 

 and highest in iron of the Adirondack ores. By employing them 

 in mixture in the proportions of say 1 to 2 or 1 to 3, the titanium 

 of the ore charge could be brought down to three per cent or less. 

 Their low phosphorus and sulfur would make them specially valu- 

 able for that purpose. 



Another feature which may promote the use of the ores from 

 that locality is their amenability to concentration, whereby the 

 titanium can be reduced by at least a third of the total, or to less 

 than 6 per cent probably as maximum limit. To the courtesy of 

 F. E. Bachman, General Manager of the Northern Iron Co., the writer 

 is indebted for information concerning an experimental run made 

 upon Lake Sanford ores at the Mineville magnetic concentrating 

 plant within the past year. A 40 ton sample was passed through 

 one of the mills and the concentrates showed the following per- 

 centages: Fe, 60.60 per cent; Ti0 2 , 9.66 per cent (equivalent to 5.8 

 per cent Ti). The tailings from the treatment gave: Fe, 42.84 per 

 cent; Ti0 2 , 32.22 per cent. A sample of the concentrates recrushed 

 so as to pass through a 16 mesh screen and reconcentrated by 

 hand showed the following percentages on analysis: 



Fe 63 



Si0 2 1.08 



Ti0 2 ../ 525 



A1 2 3 5.65 



Another sample was crushed through a 40 mesh screen and sub- 

 jected to separation under water with a hand magnet. Analyses 

 of the concentrates are given below: No. 1 is by A. S. McCreath & 

 Son, and No. 2 by P. W. Shinier. 



1 2 



Fe 65.35 64.69 



Mn 186 



Si0 2 14 



Ti0 2 5.32 6.49 



A1 2 3 2.76 2.59 



CaO .05 • 



MgO 76 



P .012 -0045 



S .041 



While it would scarcely be practicable, perhaps, to crush the ore 

 to a size that would permit a reduction of the titanium to the 



