The Salt Lake tribune. [volume] (Salt Lake City, Utah) 1890-current, 1909-06-01
MAMMOTH MINE IS
FINELY EQUIPPED
Enormous Ore Bodies Being
Mined on Large and Econom-
icaI Scale.
UNIQUE FEATURE OF
THE NEW TRAMWAY
Smelter and Converter Both
Operating in Very Satisfac-
tory Manner.

The Los Angeles Mining Review has
an interesting description OF the Nam
moth properties in the Shasta copper
belt of California in its last issue, the
company being an auxiliary company
TO the United States company OF Utah.
The article follows;
This mine is located near Nennctt on
the Southern Pacific line, and has been
a steady producer since IL was opened
up In 1905. The bodies are OF i'm
mensc size and average from 3 to II
per cent copper and s. in gold and sill
Yer, The mining method pursued is 10
drive main tunnel and run cross drifts.
The lode Is removed In slices and tim
hers installed TO support the roof while
been entirely extracted the roof is al
lowed 10 collapse. From the Various
levels the ore is sent by chutes TO the
main tunnel, which is 500 feet long. and
Whence To the bins, from which IL is
loaded into cars and taken 10 The steam
e!ectric-gravity tramway. This incline
descent OF 100 feet. The gravity tram
way is double tracked throughout, the
elevation and terrific descent rendering
1t hazardous TO attempt the passing Of
the loaGed cars at the center, practice
generally in vogue.
The mine is located l3 GOO feet from and
300 feet above the plant. Two standard
gauge cars of twenty tons capacity arc
operated on the incline the tremendous
brake energy generated being absorbed
by driving a compressor. The incline
is provided with massive terminal ma
chinery and everything has been done 10
lessen the strain. An aerial tram line
was formerly used but proved inadequate,
and the new tramway has answered
every imposed demand In an eminently
satisfactory manner
The smelter is located al kcnnctt. and
embraces two blast furnaces. 50XlSO
inches at the tuyercs; three blast fur
naces with tuyere dimension of 42xlS0
inches; converter department and other
equipment The plant originally COM
prised the three smaller furnaces, ana
the two large ones were placed In COM
mission in 1905 in order to handle the
steadily increasing tonnage. The fur
ances are provided with water -iaclctcd
tops. which prevents heavy mcrustation
and attendant freezing. The light crust
constantly forming in the tops drops back
in the furnace in thin scales. instead of
accumulatinS as is the case when brick
from the furnace bottoms 10 the charge
floor ana are built in vertical sections.
The two end Jackets extend from the fur
iacketed top is also used in place or the
regulation brick hood. The water Jacket
ing of the Mammoth furnaces : very
complete. extending from the floor
10 the take down. provided fo,' cs-
cape OF the gases.
The settlers OF the two new furnaces
arc sixteen feet in diameter, each FUR
nished with an intermittent tap. The
settlers for the three old furnaces have
diameter OF six feet The matte flows
in continual stream into pan couvcyors.
which are automatically transported 10
the converter stands. There are TWO
compressor stands and eight aGH150 inch
shells. The large number of shells have
been provided In order that the highest
efficiency might be maintained in keep
ing both stands in operation. The stands
and molten metal are handled by TWO
Morgan overhead electric cranes having
span of fifty feet with a main hoist
N fifteen tons capacity and two auxiliary
hoists OF fifteen tons capacity. The
powerful blast for converter practice is
supplied by q 10. ono cubic foot NordbeYg
blowing engine with a pressure OF fif-
teen pounds 10 the square inch II is
operated by 150-horSepowcr General
Electric motor. rAceivins power from the
wires Of the Northern California Electric
Power company.
The Stag from the settlers is received
in slae-pots and hauled by electric loco
motives to the Stag dump Tho tracks
and dump are located At level eisht
the movement Of the Stag trains without
interfering with active smelling.
supporting stack 200 feet high and elgh-
teen feet in diameter. Tho main dust
chamber is 200 feet long with section
a area OF 4oI square feet, and is built
toms. The old dust cha mber is also used
and gives an additional length OF 2oo
feet and sectional area Of 40 square
feet. Owing 10 the large siz" OF the
chambers a remarkably close saving OF
the dust is effected; The. dust drops
ming directly Tia and is taken 10 an
elevator and raised 10 the storage bin.
From here IL Is delivered To a belt-con-
reyor which discharges into the bridquet-
ting department. The converters are
served by the old 15ofoot stack. which
is OF stcel and seifsustaining.
The power department comprises six
Connersville blowers with a capacity of
l24 cubic feet Of air per revolution. with
135 revolutions made per minute. Tho
blowers are operated by electricity from
motors. The electrical installation con-
sists of three General Electric motors
with a capacity OF $50 horsepower: three
Westinghouse motors Of 200 horsepower
capacity: two electric motors OF 100
horsepower. and the General Electric
motor that drives the Ncrdbere blower.
The total indicated capacity Of the ma in
pcwerhouse Is 230o horsepower. while
tcralIy To the total amount Of power
generated. The current is received .di-
rect from the wires Of the. Northern
California Power company, whose plant
Is situated in the high Siorrns,
Pyrte smelling Is used with from ia
per cent coke in the charge About 80
per cent silica and considerable lime
stone is also used The silicious ores
come principally from the Quartz Hill
mine al Old Dgsings and the limestone
from Holt Gregg's quarry, The quarry
Is cona@cted with the the plant by ,,sr an cleo
and Mammoth smeiter are joined by q
gauge steam railway The ore
from the mines is transported to the re-
running over the h!ns and discharginp
directly into them. The ores of tho
Quartz Hill mine carry about 20 per ccnt
silica and 81 in gold. The mine Is helo
under lease BY the Mammoth company
and is the largest producer OF slliciou:
ores in Shasta county.
Daniels the Tailor--All tho boy.