Iron-Ore Concentration, No. 5. [Volume: 8, Issue: 6, 1890, pp. 349-353]

No. 6.]

CHARCOAL IRON WORKERS.

353

The following analyses of brown hematite ores before and after
jigging are presented.
Ore before jigging-metallic iron, 31.72. Insoluble residue, 48.82.
Same ore after jigging-metallic iron, 51.465. Insoluble residue, 15.3.
Ore before jigging-metallic iron, 43.20. Insoluble residue, 26.40.
Same ore afterjigging-metallic iron, 50.59. Insoluble residue, 16.53.
Where phosphorus exists as apatite it is often reduced by washing and jigging the ore, thus bringing some non-Bessemer hematites
nearer to, or within the Bessemer limit.
We had hoped in this issue to have given late results of concentration by magnetic separators, but at the request of parties interested we defer this data until the average of longer runs can be
given. We may, however, note that considerable progress is being
made towards placing concentrates on the market as a regular
source of iron-ore supply, and some excellent results have been
obtained.
The new plant at the Croton Mines, New York, is now in operation, using the Buchanan and Croton Magnetic Separators; the concentrating works near Bechtelsville, Pennsylvania, is now separating
a very lean magnetite by the use of the Edison Separator, and at
Michigamme, Michigan, the Wenstrom Magnetic Separator is being
worked to utilize a large dump pile. A large concentrating plant
is in course of erection in New Jersey, two others are approaching
completion in northern New York, and a third is being remodelled
in southern New York.
Before the close of the year 1890 we believe that works will be
in operation capable of producing an aggregate of 1000 tons of ironores daily, concentrated by magnetic methods.
MR. ALEXANDER POURCEL has, it is reported, succeeded, at
the new basic open-hearth steel works of Bell Brothers, in producing from Middlesbrough pig-iron, carrying 1.7 per cent. of silicon
and as much phosphorus, steel with as low as 0.03 per cent. of
phosphorus. The lining of the furnace is of chrome-ore.