The weekly tribune. [volume] (Great Falls, Mont.) 1891-1894, 1893-02-24
VAST ARE HER RESOURcEl'
A Peep at One of the New
Developments of
the Il. 4 VI.
Making Pure Copper Here Bv the
Wonderful ElectrOlytic
Process.

any notion of the vastness of the Bos'
ton e. Montana plant at Black Eagle
falls. Fewer still are keeping pace with
its growth. Roughly speaking, citizens
know that there is a great smelter there,
but the gigantic dimensions of the in
are like unknown lands to the majority
of citizens here, though they live but a
few miles from the plant itself.
Mr.. III. Il. Caullield, the shrewd and
scientific young New Highlander who
has just completed the olcctrolytic works
for refining the pig copper produced at
the smelter, will leave for the east today
over the Great Northern, and kindly
showed a tribune reporter over the new
words yesterday. Mr.. Cauliield is not
more than IS years old. but he is. per-
haps, possessed of some of the most i'm
pOTtant secrets OF copper r~elining-se-
crcrs which enable him 10 save all the
gold and silver from these base ores in
stead of having those precious metals go
into the Golfers of the Welsh retincrs.
IT is said that lie learned some Of these
secrets from working as a boy in the
Welsh refineries, whittier he went for
the express purpose of mastering this
important art. lie has certainly estab-
lished here "a refining plant that is a
marvel Of simplicity, economy, and eff
feCtiveness.
Many things had to be done before such
a plant was possible. There must be a
practically ineXhaustible supply of ore
available to begin with, and then must
come the work of the concentration and
smelter. the casting of the copper in
pigs containing all the other metals car
ried in the ores, and a certain percentage
of impurities. The refining process
alone will be touched on in this article.
As is generally knowp, the Montana
copper ores are among the richest in the
world, the ores running up to ten per
cent or more in copper, while the natur-
al Upper of the Lake Superior region is
considered very rich when it reaches
three per cent. But the Montana ores
also contain paying quantities of silver
and gOld-tnat is to say. quantities that
are worth saving although not sufficient
to pay for mining them for their own
sakes alone. The other metals which
must be removed before the copper can
be turned out chemically pure are traces
,.o,;. ,,+i,,,,. IN ,rnp ,pJ b;u.
oartL
The electrolytic process is a comb
nation Of chemicals and electricity. So
to speak, the first is the medium and the
last the agent. TO the layman 1t is a
mystery and Il marvel, and even the SCI.
{ entitic man who plans the whole thing
and puts it into operation has only q
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