This Analysis proves, that the concentrated ore-sand (magnetite) is a very high graded iron-ore, (78.45 °/0 iron-oxydes with 57.15 0 0 iron) very pure, as it is almost free from copper, sulphurand phosphorus.
On account of its powder-form, as well as the high titanium-alloy, it was until recently considered unfit for the manufacture of iron, according to existing methods.
This iron-sand (crude ore) which contained 75 0 „ of magnetite and 25 •/. of gangue was reduced to a pig-iron, free from titanium and a slag, rich in titanium, for the first time in an electro-thermical process demonstrated in the Laboratory of Electro-metallurgy of Professor Dr. W. Borchers at Aix-la-Chapelle (Germany) on the 12thof December 1906 (See Official Report, page 18 19 and 22 23) explained and discussed by Mr. J. W. Richards, at the Eleventh General Meeting of the Electro-Chemical Society in Philadelphia Pa. May 4, 1907, President Carl Hering in the chair.
This part of Borchers' total process of utilizing titaniferous iron-ores (including iron-sands) was worked out by Professor Borchers and his students more than 8 years ago.
It was published in 1902. (Borchers nevv process see page 9).
The following Analysis of the metal and of the slag, shows exactly the result of this process.
Laboratoire de M. L. Campredon a Saint-Nazaire le 26&31 Déc. 1906. Echantillons de fonte (pig-iron):
Manganèse Soufre . . Phosphore Silicium
néant ou traces