The Goldfield news and weekly tribune. [volume] (Goldfield, Nev.) 1911-1947, 1917-12-29
MINES INSURE OUTPUT
CONTINUED from rage oneJ

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installed lately and the Plant is now
treating $50 tons of ore daily, the
product being taken from the mine
and from the mill dump near the
collar of the shaft. All power for
hoisting ore and operating the mill
is supplied by electricity, generated
in the company's power plant by oil
burning engines.
A high-powe- hosting engine will
shortly replace the present hoist and
will be operated by air from the cleo
trically driven compressor. Manager
Brady a new departure in
connection with the storing of COM
pressed air, involving the use of a
150-foot cross-cut as an air retainer.
This cross-cut will be sealed by
means of a concrete bulkhead, in
such a manner that a single pipe
will serve for charging and supply.
In every department the mill
equipment is of the most approved
and up-to-date design, and the pro-
cess of treatment, straight cyanida-
ton, is characterized by the greatest
simplicity in operation. From the
shaft the ore is dumped by automat-
ic skips into a 150-ton steel, n
bottom bin, feeding automatically
through a crusher and grizzly to the
main 70-foot belt c%onveyor, which
delivers 1t to a similar feed bin,
whence 1t passes to the 6 by a ball
mill, driven by a direct 75-horse-
power motor. The discharge from
the ball mill is elevated to classifi-
ers, the oversize going to two 4 by
16 tube mills and the overflow to
the Dorr thickeners. The process is
continuous for the oversize, which
follows circuit, finally passing to
the agitators.
Cheap fuel Is an important fac
tor for economy in generating mo-
tive power for the entire plant. The
2Ov-horsepower semi-Diesel engine,
driving a 12O-kilowatt generator, OPP
crates on "a gravity Standard Oil
Calol, while the engine generating
power for the hoist and compressor
runs on "tops." The oil is stored
in tanks at a safe distance from the
mill and is delivered to the engine
by gravity. Every possible safeguard
against fire is provided and the
power plant is housed in a building
of corrugated iron on structural
steel.
Deep Shaft Being Sunk
The main incline shaft of the Sill
vermines property Is nearing a
depth of 700 feet, where a station is
to be cut for the purpose of explor-
ing the ore-channel. Sinking will
then continue to reach the perma-
nent water level, and it Is not likely
that another station will be cut I'M
til this point is attained, as it is
desired by Manager Brady to open
and explore as soon as possible the
sulphide zone and to determine the
character of the orebodies on deep
levels. Lateral work is in progress
from the station on the 5O0-foot lev
ell, where the vein Is shown to be
of great width and to contain large
bodies of excellent mill ore. Levels
above this are also being explored
and ground is being broken rapidly,
as under the present system each of
the jackhammer drills is used in
two working faces daily.
1t is expected that the initial
cleanup of the Silvermines mill Will
establish the complete success of
the enterprise and show a high ex-
traction of the gold and silver con
tent of the ore. The ore is a clean
silver chloride, carrying FREQ gold;
it is found in large bodies on all
levels that have been opened and it
is estimated that the ore now brok-
en- in the mine and on the mill dump
will more than pay for all mill and
mine installation. Provision has
been made for weighing and samp-
ling custom ores and the company
will spare no effort to handle the
output of all other mines in the dis
trict, in order that development may
be stimulated on other properties.
The capacity of the plant can be in
creased without difficulty to 800
tons daily.
other mines in the Hornsilver dis
trict which have produced ore for
shipment or which have pay ore in
sight include the Orleans. Silver
King, Hornsilver, lara, Helen and