Gilpin observer., 1912-09-19
NEW MILL FOR
G|LP|N'S ORES

The ore producer of the county
Moulton-Adams ore treatment plant
Is to be erected at once and will be
in complete operation by May list,
next. The sampling and separation
plant will be operated at Black Hawk
the finishing plant at Denver. This
Is the elimination Of IA years study
and experiment in determining the
most economical method of treatment
Of the class Of ores that the mills Of
tho county are unable to handle at
a profit to the producer, they being
too complex In their makeup for
either the smelters or mills to handle
with profit.
This process mill will handle
class OF ores. that are not available
to present mill or smelter conditions,
and will not in any way compete or
prejudice the present milling or
smelling plants available, as 1t aims
to cover a field in metallurgy that
has long been neglected, viz the re-
covery OF values from complex ores
that has heretofore baffled the ef-
forts OF mining men. At least a mil
lion tons OF this class of ore is in
mines Of the county. while half this
amount Is already mined and piled
on the many dumps Of the camp.
The American Metals Producing
company has been formed to exploit
and put in operation the new plants
with E. S. Moulton and G. w. Adams
in charge as managers.
A brief summary Of the process is
Of interest at this time. 1t covers
the complete extraction OF all the
metal values in the ores, including
the sulphur. Ores containing zinc will
not be penalized for their zinc con-
tent, the gold and silver values be-
ing settled for regardless of the CON-
plex condition that may surround
them. The company relies largely on
the base metals for the cost of op-
Grating the plant, charging as low as
S1.00 per ton for sampling and treat
ment on class Of ores.
Copper and lead values will be paid
for at the market price of same. In
the recovery OF the metal content
nitro-calcium solution will be used.
The gold and silver are extracted
after the removal Of the sulphur. zinc
and copper. This is effected by a
combination of the well known ANAL
gamation process and an entirely new
method. In the condition to which the
PULP is brought at this stage 1t is
found that $50 OF the gold will anal.
gamate directly on copper plates,
coated with mercury. in the ordinary
manner. The remainder is in such
readily when passed into this new
nitro-calcium solution.
Cyaniding will also effect a good
extraction OF the gold and silver
values. and up to the present time
was superior to and cheaper than any
other process. However. this new
nitro.calcium method Is decided ad-
vance beyond the most improved cya-
hiding. The extraction Is made much
quicker and at about one-half the
cost for chemicals. The final precipi-
tation OF the gold and silver from
the solution is accomplished by an
entirely new and simple method
which does away with the zinc shaw.
ings. or zinc dust. and the trouble
some reduction Of the precipitates
afterward.
With the success Of this plant, mil
lions Of tons OF valuable ore running
from $3.50 to $500 per ton in value
will be available Immediately for min.
Ing and shipment, thus adding mater.
tally to the gold and silver output Of
the county. The erection and install
lation OF the new plant will be wntch.
ed with interest. The initial capacity
will be 100 tons per day, the COM
pany purchasing the ores outright as
is the present method at the local
samplers.