Tonopah bonanza. [volume] (Butler City [i.e. Butler], Nev.) 1901-1909, 1904-01-02

MeSSrS. WI. 4 DOoo anu AlOA - ~
Cone, and now in process of printing,
promises not only to be a big success,
but to successfully solve the question
of treating all those Tonopah ores
which are responsive to milling.
This mill is being installed at the in
stance Of the original leasers, who,
c~uriously enough, were the men that
gave the camp its initiation into the
ranks OF the producers. This is q
noteworthy comment on the energy
and push Of those intrepid pioneers.
The present installation comprises
two fve-stamp batteries with the
usual accessories accompanying a So
called continuous process mill. Found
ations, however, have been laid for
two additional batteries. It's present
estimated capacity is fifty tons per
twenty-four hours. The.mill building
is Of steel construction throughout,
sheeted and rooted with galvanized
corrugated iron. All foundations,
both Of the building and the machin-
ery, are concrete. There is no wood
in any part of the structure, except
ing the platforms, doors and window
frames.
The ore is received on a platform
at the head of the mill, whence it
passes to q 9x15 rock crusher. Here
it is broken to about the size of a
walnut. Thence the ore is passed
up an elevator which discharges into
an ore bin so located that automatic
feeders supply the stamps. From
this point all material travels by
gravity. The ore bin is constructed
OF steel and cement.
AS already stated there are two
fi%ve-stamp batteries. The stamps
weigh 1860 pounds and will make 102
drops per minute, crushing to a 20
mesh. Modern practice seems to be
gradually retiring the light stamps,
and adopting ones weighing from 1906
to 1900 pounds.
From the stamp mortars the pull
discharges into two Huntington mills
-one mill to each stamp battery
The Huntington's regrind to an 81
mesh. At the tail of the Hunting
tons, three separators have been in
stalled, the functions of which are Il
separate out about so per cent o
the water in the pulp and pass i
back for reuse to the battery tanks
One OF the novel and thorough,
modern features of the mill is it
stamp battery. 1t is technical
ly known as the "Pachuca
stamp battery, and as installed her
seems to typlfy the final elimination
in the evolution Of stamp batteries
From the old square timber staml
with its iron shoe to the Pachuci
stamp battery was a long step. TIL
forms and styles that contributed t
the evolution Of this department G
milling we're as varied, inefficient an
cumbersome as then we're mechanic
and foundries to make them. TIL
salient features embodied In the Pa
chuca battery are that they hav
concrete foundations, instead of tn
built-up wooden foundations, the hay
low mortars with the stamp head
close to the lower guides, just as it
good practice to put the journal OF
shaft as close to the pulley as poss
BILE. They are also equipped wit
Incorporated latch fingers and tn
whole mounted upon a steel l bear
cantilever frame.
The design and construction of th
stamp battery is in harmony wit
the best principles Of engineerin
and are the results Of the traine
engineer who has seer the requir,
ments of the battery, rather tina
the design Of the foundry mechani,
From the Huntington mills ii
pulp passes down to a grinding an
mixing pan, driven by a vertic,
shaft actuated by belt from tt
counter shaft. The entire series
ten pans and settlers are similar
and each Independently driven,
that n one of hes eries NAV wbt