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iron ore resources.
245
"svartmalmer" (magnetic iron ores) and "blodstenar" (hematites).
With regard to the different qualities of ores the Swedish iron ores are
divided as follows:
ores low in phosphorus, with less than O’Ol % of phosphorus, for
high-quality-production by the acid Bessemer and Martin processes,
ores moderate in phosphorus, with a phosphorus-content exceeding O’ol % but
less than 0"06 %, suitable for refining by the Lancashire process, and
ores rich in phosphorus, with more than 0’06 % of phosphorus, available only
for refining by basic processes.
The Swedish iron ores are as a rule titanium-free or very low in titanium.
Only at Taberg in Småland and at Ruoutevare in Lappland as well as in a few
other minor deposits there occurs ore rich in titanium.
Photo. Th. Gehrman, Hedemora,
Shaft Head-house and Ore Bins, Klackberg Mine, Norberg.
In the mining districts of Central Sweden there occur both magnetic iron
ores and hematites; the latter are, as a rule, "torrstenar", whereas the magnetic
iron ores are principally "engående" och "biandmalmer". In Central Sweden the
ores in most of the deposits are low, or moderate, in phoshorus; however,
Central Sweden has also large supplies of ores rich in phosphorus with about 1 %
of phosphorus, as, for instance, at Grängesberg and its vicinity.
In the Lappland ore fields magnetic iron ore occurs in predominant quantities,
although hematite also occurs in considerable quantities, as at Gällivare,
Svap-pavara, and Ekströmsberg. The ore of the Lappland ore fields is generally high
in phosphorus, from 1 to 3 % and upwards, but there also occur ores low in
phosphorus in several of the ore fields (as, for instance, at Gällivare, Kirunavara,
Tuolluvara, Leveäniemi, Mertainen).
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