Los Angeles herald., 1908-07-27
GREATER VALUE
THAN GOLDFIELD
DISCOVERY WILL ELIMINATE
ROASTING PROCESS
THREE-DoLLAR ORE MAY NOW BE
MILLED AT PROFIT
Wonderful Invention Just Tested at
GoIdfieId viii Render Mines In
dependent of Railroads
and Shelters

GOIDFIELD. July 26.-A discovery of
vastly greater Importance than the
finding of gold in Goldfield or the un-
earthing of fabulous mountains OF
high grade. is announced by Manager
Mackenzie of the Consolidated Mines
company, through the discovery OF
method of treating sulpnide ores thae
insures the extraction of 80 per cent Oh
their precious contents without having
to roast the ores. The latter form OF
treatment is used today all over the
world. and no later than last week one
Of the greatest mill experts of the
country predicted that the Gold1eld
mills would be failures, owing 10 the
fact that the management had not
mace any provision for roasting the
ores.
Manager Mackenzie does not at
tenlpt to conceal the process, which Is
protected by patent, but takes pride IN
telling the results of the experiments
that were conducted before the process
was fully determined.
By means of this discovery ore run
ming as low as SO ton can be handleo
at a profit Every mine can treat It's
own ore, and every miner with little
capital can install a plant that VIII
render him independent of smelters
and railroads The find is little short
of the tranSmutatiOn of base meIaiS
to gold, as it brings into the market
tens of thousands of tons of rock tnat
would otherwise be worthless II is
estimated that the process Will net the
Consolidated alone pront Oh Slz,Uuo
a day, or over 100000 per annum,
for this single company. When the
same principle is applied to the mines
of the world it opens up vista OF
wonderful possibilities.
Miners to Reap Benefit
Il is one of the discoveries that will
reyolutionize the treatment OF refrac-
tory ores, and thousands of mines con-
tanning fair values, but of a refractory
nature, throughout the world, will reap
the benefit All over the country are
mines where in evidence is refractory
ore that cannot be treated by amalga-
nation or cyaniding. The cost Oh
TRANSFORMATION and smelling charges
precludes the possibility of shipping to
the smelters. 1t looks as though that
condition of affairs has come to an
end and that 1t is no longer necessary
to depend on railways and shelters for
the conversion of gold into bullion right
at the mine.
Ever since ]. H. Mackenzie took
charge of the Consolidated he has been
conducting experiments, with the OBJ
ject in view of finding out if there was
acid process. He engaged the best
metaIlurgists in the country, and for
months laboratory tests were carried
on at the Combination mill by A. G.
Hutchinson. 1t was found that fifty
pound lots yielded to the treatment in
such a manner that surprised all those
who were in on the secret. Last week
the old Kincaid mill was equipped for
more extensive tests of concentrates.
This has been going on for ten days at
the rate of ten tons a day. The big
plant under the secret process turned
out a greater success than the labora-
tory tests.
Solution of Four Hours
Concentrates that assay at the rate
of 5000 a ton yielded 80 per cent of the
assay value after having been in the
solution for four hours. This was on
stuff that was not supposed to be
amenable to treatment by cyaniding.
The other $50 in the ore will not be
lost. All that will be required is longer
treatment, and superintendent Hutch
inson is of the belief that the tailings
will not assay better than 81. The
process is as cheap as the ordinary
cyaniding on oxide ore.
Application for a patent on the pro-
cess was filed nearly month ago, and
until that is secured those connected
with the discovery are keeping quiet
about the details. The men who have
made application for this patent are
experienced mining and mill men who
nave conducted their tests in such an
elaborate and careful way that they
cannot be mistaken.
The new process is a wonderful step
in the forward movement of metal
lurgy, and especially in the treatment
of refractory ores without roasting.
As one of experience both in mining
and gold extraction said, 1.-THE world is
ours, and the greatest discovery that
has been made in Goldfield is one that
will be known throughout the globe in
a. very short time"