The Salt Lake tribune. [volume] (Salt Lake City, Utah) 1890-current, 1910-09-27
Details of Machinery Which
Has Just Been Placed in
Commission.
SWISS PUMPS ARE
FEATURE FOR UTAH
CentenniaI-Eureka Now Ready
TO Give Sulphide Zone a
Thorough Test.

task that is now confronting the officials
OF the United States Smelling. Refining
and Mining company In sounding the wa
ter level OF the Centennial Eureka prop
erty OF Tintic. The management has
just rounded out successfully. after sew
eral weeks hard work, the installation
of much new equipment, all which Is
now in commission. In g. general way the
public is familiar with what this equip
mcnt consists Of The following para
graphs give a more detailed description
than has yet been released by the COM
pany, the facts being given. In compli-
ance with the request OF The Tribune.
Monday. by the local officials.
IL VIII be recalled that the Holden
tunnel was driven several months ago
for the purpose OF allowing moro eco
nomical extraction OF ores, a more eco
nomical avenue for incoming mine sup
pies and 10 save approximately 500 foet
OF pumping of water from the depths OF
the mine, This tunnel is 2207 feet in
length. and cuts the main Centennial Eu-
reka shaft 585 feet below the collar OF
the shaft and thirty-five feet below the
with electricity throughout. and is laid
with f5-pound rails. having a grade OF
only four-tenths of ! per cent
The improvements. in addition to this
tunnel, consists OF ore bins at the juno
ton of the tunnel and shaft, eXcavated
in solid rock, and having d capacity OF
100 tons; an electric tramline from these
bins 10 the loading bins or chutes at the
the 200O-foot level Is the pump station
and new pumps, The water is pumped
a distance OF approximately 100 feet to
the tunnel Near the mouth OF the tun-
mel an electric power plant has been con-
structed for furnishing power for the
pumps and other equipment. In addition
10 the power plant is a transformer sta
ton. which is connected with the trans
mission lines of the Knight Power com
pany Among the other improvements on
The surface are new mill and ware
house.
From the cars in which the ore Is
hoistcd IL is dumped into the tunnel bins.
in which there are four compartments
for the different grades OF ore. The ore
Is drawn through compressed air oper-
ated gates into the gable -bottomed tun-
mel cars. These cars are of steel and OF
hye-ton capacity each. They are han
died in trains of from six to seven cars
each by a five-ton General Electric To-
comotive on a three foot gauge track TO
the leading chutes on the surface. The
voltage used is go volts. The chutes
AT the surface arc so designed that the
tunnel cars can dump their loads direct
ly Into the shipping cars.
The pumps are in duplicate, OF tho tur-
bine Type. They arc made in Win
terthur. Switzerland. by Sulzer Bros,
highest class machinery in Europe, When
water in considerable quantity was
struck In the mine. the important uucs-
tion TO decide was the type OF pump re-
nuired. There were the various types
to select from. steam. compressed air re-
cproca ting, electric driven reciprocating
and electric driven centrifugal or tur~
olne pumps The compressed air driven
pumps were not considered because OF
their low efficiency; the steam type was
not seriously considered on account OF
the difficulties caused by conducting
steam down the great distance through
Inn haf he oil,
between the electric driven plunger and
the turbine pumps. After careful con
sideration the latter were selected.
The principal point raised against the
viding the pumping lift into two Sec
tions, thus requiring a series OF two
pumps 10 elevate the water. 1t was rec
ognized that the mechanical efficiency
OF the plunger pump for the conditions
would be higher, al least while the
equipment was new; however. when all
things were considered. the turbine
pumps had the advantage. Tho princi-
pal advantages of this type were high
efficiency of the high-speed motors which
could be used; the absence u valves and
a multitude OF packinGs and gears.
Each pump has nominal capacity OF
300 gallons per minute. against total
head OF 170o feet. The pumps are in
Two sections. each section. being mount
the meter placed between them One
unit serves as a spare, and In
an emergency both can be operated Civ
Ing a capacity OF 1000 gallons per min
ute. The motor is a general electric |
make, rated 400 horsepower. al 1900 rev |
olutions per minute. operated by a three |
phase 4OOo-volt current. The pumps have
thirteen stages, five OF which arc in one !
section and eight In another. The motor |
drives the pump sections through hcxi- |
bic couplings The impcllers and guide
Eanes are made OF highly finished bronze,
The thrust In the pump shafts is re-
sisted by hydraulic thrust bearings. Each
pumping unit has the following overall |
dimensions; Length. 10 feet; width. 5
these pumps permits the construction of !
a very small station. The company has |
used the same type of pumps in It's
Mexico properties, and considers them |
much better made and OF higher efri-
cheney than similar pumps made In this |
steel pipe which is located in the pipe !
OF the shaft The lower |
100 feet arc Of one-half inch thick |
ness, while The upper part is three eigh,hs
cast steel and the pipes are expanded |
into them. AT tho Holden tunnel level /
the water discharges into a wooden laun- |
der which Is used for conducting 1t to the !
surface.
In every respect the power plant is Of |
modern construction. and OF a very cf- I
hcient type. II IS divided into boiler and |
engine rooms. The building is of steel |
and the roof is corrugated steel In the 4
boiler room are three a25 horsepower /
Sterling boilers in individual settings |
The boilers are operated at 175 pounds
steam pressure. and they are equipped !
with American stokers. Tho coal used
Is dumped from the railway cars into /
hoppcrs beneath tho track. from these
il is brought by belt conveyors To a 900
ton storage bin. The latter is at a suf-
iiclent elevation To enable the coal TO
be drawn into a push-car and trans
ferred to the stokers.
In the engine room is the engine zen
orator unit. switchboard motor generator
EXETER. engine EXETER motor generator
for the trolley line. feed pumps. feed
water heater and dry vacuum pump.
The engine generator consists OF n 400
kilowat electric generator mounted on
the shaft OF 650-horsepower Ball and
Wood engine. The uni, makes $50 revo-
utlons per minute and the current is
al 1000 volts.
The switchboard Is so designed that
power can be distributed TO the different
machines and accurately measured II
also Is so arranged that power can be
taken from the transmission line of the