Tonopah bonanza. [volume] (Butler City [i.e. Butler], Nev.) 1901-1909, 1905-11-04

In the last issue OF the Mining and
Engineering Journal, 5. A. Worcer-
ter describes the new mill to be built
for the Tonopah Mining Company, as
follows:
The Tonopah Mining Company's
mill is TO be located at Goldield juno
ton. about Is miles from the mines,
the ore will be delivered to the bin at
the crushing and sampling plant in
trains of standard-gauge dump cars,
the railroad being owned by the
Tonopah Mining Co. (Which is also
erecting a large electric power plant
for furnishing current to mines and
millsl.
Ore from the bin gate falls to the
No. u crusher; and, when crushed,
it is elevated to the revolving screen
with IL in. perforatiuns. All over
size divides ia two spouts to the No.
A crushers, which deliver to the same
elevator as the No. "a crusher.
When the material passes the Hin.
perforations, it is sampled by the
first Vein sampler, the rejection
passing to the mill conveyor, and the
sample (about ~ passing to the
rolls, which reduce it to about in
This hin. product passes to the sec
oud Vein sampler, which takes a IL
sample and sends its rejection also
to the mill conveyor (about $50 feet
long,, which delivers the ore on the
longitudinal conveyor operating over
the bins of the 100. stamp mill.
A sell. propelling travelling tripper
delivers the ore to any bin desired
Bin gates and Challenge feeders de-
liver the ore to 10 stamp batteries of
l050-pound stamps, with apron-front
mortars having cast iron bases and
concrete foundations. The batteries
are provided with the simple back
knee frame, and are driven in two
sections Of 80 stamps each by $50
horse power induction motors located
on the main floor. A swinging belt
tightener is used for each l0.stamp
battery. and the motor belts, driven
with the slack side Oh top, n tight
eued by moving the motor on its base.
This stamp mill drive is simple and
efficient. Self oiling bearings are
used throughout the plant.
The pulp from the stamps (which
drop 100 times per minute and crush
in cyanide solution) passes to 10
coarse classifers in which the coarser
product is re ground in five 5ft.
Huntington mills, to 80 60 mesh
This pulp then joins the fines from
the classi6ers and is elevated by the
60.foot sand wheel TO the twenty fine
classiders arranged in pairs. The
coarser sands from the upper 10 are
re-classified in the lower ones, and
the slime from all goes to the 8 slime
watts with agitators, while the sand
from the lower cones passes to one or
other of the two sand collecting tanks
(33 by s ft,), to which they are deliv-
cred by the Buffers revolving dis
tributor. Each of these collecting
tanks has three slime gates; when
filing the tank, the water and slime
pass over to d 81 inch Premier sand
pump, and are raised to a fine classi
fer. This sends its slime to the
appropriate tanks and returns any
fine sand to the collecting tank.
After draining Ia the collecting
tank, the sand is excavated by an
automatic machine and delivered to
the central belt conveyor; this in
turn delivers to a centrifugal distrib.
utor placed over any desired teaching
tank. Both excavator and distrib.
utor travel on rails the whole length
of the two lines Of tanks and can be
used over any desired tank After
teaching, excavating and re.distrib-