Tonopah bonanza. [volume] (Butler City [i.e. Butler], Nev.) 1901-1909, 1906-09-01
GRADING FOR
MONTANA MILL
The Big Mine to Have a A-Stamp
Plant Capable Of Treating
100 Tons Of Ore Per Day


On Tuesday the grading for the Mon
tana-Tonopah mill was begun. Specifi-
cations for machinery for the mill have
been placed with several big engineer
ing firms and bids will be closed on
September l. The contract for the
complete equipment of the plant will be
let by September 10. The mill will be a
little more than 100 yards north of the
office. 1t will take up large space, as
a double concentration process will be
used and will take in the spur-track
that runs up to the Montana.
The mill will have s batteries with
stamps to battery. They will be
placed in the upper end of the mill and
will act as crushers only, there being no
no amalgamation process used. The
ore now in the mine will be hoisted to
second level of the gallows frame,
whence it will fall into ore bins below.
Passing through the bins, the ore will
fall to the ground level and will be
taken up by conveyor and carried to
the supply bins of the mill just above
the stamps. After passing through the
batteries the ore will go over a number
Whitley concentrating tables, on which
the first concentration of pyrities will
be made. This product and that of the
later concentration will be shipped, and
for this purpose car will be installed
to carry the concentrates to the freight
car.
The residue after passing over the
tables will be conducted to the secondary
crushers, system of rollers and tubes.
Here it will be reduced sufficiently to
pass over yet another set of tables,
where the final concentration will be
made, and the product of which will be
conveyed to the car. The remainder
OF the pulp will now pass over the cut
where the spur-track will enter the mill
and will go to the cyaniding plant
below, where the extraction of all the
remaining values will take place. inst
beneath the future site of the cyaniding
plant there is a sharp dip in the ground
and there will be plenty of room for an
enormous dump of tailings.
The mill will be supplied with water
by the big pipe of the Tonopah United
Water Company which crosses the fiat
just below the mine. The water used
to carry the ore through the mill and
the water used for cyaniding will be
made available for use over and over
again by means Of settling tanks.
Part of the mill will be directly over
the milling-ore dump which has been
accommodating for the last five years.
Mark B. Kerr intends to bring this ore
to the mill by bottoming the dump, thus
saving the trouble and expense of in
stalling separate hoist. The motive
power for the mill will be electricity
throughout and it is the intention of the
management to do some custom work
if the capacity of the mill is sufficient
to treat all their own ore as well. 1t is
not thought probable that this will be
the case. There is enough ore already
blocked out and on the dumps to keep
the mill going steadily for the next two
years if not another pound of ore were
stopped in that time. As each stamp is
calculated to handle four tons per day
(of three shifts, the mill will be able
to treat l60 tons every "a hours.
The new two-drum hoist arrived
Wednesday and is in course of erection.
1t will be worked by electricity, with a
secondary steam plant similar to that
in use at present. The installation of
the new hoist will not mean the COM
plete discarding of the present one,
as it will be retained for use in case of
such as an accidental one
to the new engine.