The Salt Lake herald. [volume] (Salt Lake City [Utah]) 1870-1909, 1897-10-31
HOW ORE IS EXTRACTED FROM TIE MOUNTAIN SIDE IN Ed


a mans fist and from the lower set of
rolls drops into an elevator or endless
conveyor. which carries the pieces up
to the top of another part of the build
! ing, and dumps them into shaft lead
| ing down to three more sets of rolls
set directly beneath one another As
| the rock passes through these rolls the
! latter are found to be placed nearer
and nearer together, until with the
| last or third set, the two rolls COM
posing it are set tightly against each
other so that when the rock ultimately
! passes Trough, it has been reduced to
dust.
! One of the remarkable features of this
| immense crushing plant is that the
crushing done by the largest, or what
are known in EDISON as the giant
rolls. is not the direct result of the
energy of the steam engine. The rock
is really crushed by momentum. For
| instance, the engine which operates the
| 100-ton rolls is of less than 100 horse
/ power. 1t has Just power enough to
! cause the big rolls to revolve at ter
! rife speed, but more than this it can
not do. If any obstruction-a rock, for
instance-should come between the rolls
a patent clutch by which the engine is
connected TO the rolls at once causes
| the engine to let so its hold The mo-
mentum of the rolls, however. carries
them around ana the rock is crushed
by this stored-up energy The same en-
ergy, if applied directly from the en-
CINE. would necessarily have to be much
greater than it is. and at the same
time the shock of the obstruction COM
ing between the rolls would jar the
engine to pieces in a short time In
fact it may be said that the work OF
ore separation would not be CONNER
cial success we're it not for the utili-
zation of three natural forces-momen-
tum, magnetism and graYlty-paomeh-
tum to crush the rocks, gravity to take
the place of expensive machinery in
separating ore, and magnetism to draw
the fine particles of ore from the sand.
a MILE OF MAGNET FACES
One of the features of Edison
is the great number of endless
chain elevators which connect the
buildings with one another AS the ore
passes through each building, it is car
ried or to the next automatically in
these endless elevators After it leaves
the crushing plant, it is carried to the
top of the magnet house and dumped
into space to find its way through
many sieves of varying mesheS and
past many magnet faces OF varying
strength before it ultimately falls in
the cellar of the building and into an
other elevator which carries the greatly
changed product to the next depart
meat There is over a mile OF magnet
faces in the magnet house me ore
drops down through long chuteS. On
The way down it passes the magnet
faces Directly under each magnet face
is a side chute leading off in direc-
ton of its own. and directly above
each magnet face is sieve. AS the orc
comes dowa, if fine enough to pass
through the sieve, it continues its
course; if not, it rolls Off the sieve into |
a chute at the bottom of which there is |
n conyeyor which carries it back to the !
rolls to be recrushed. If the product |
goes through the sieve. the magnet |
draws the ore from the sand. the sand !
passing straight down to an elevator !
which carries it out of the building and |
dumps it into huge sand pile.
The falling sand presents a very |
beautiful sight A stream of it. SHIN I!
mering and shining in the sunlight. de- |
ecends AID mixes with the great cone
piled up beneath. Nothing could |
be more beautiful than this gorgeous |
cataract of powdered rock falling like !
a veil. and noiselessly adding to the |
great mass below Nor is 1t useless |
accumulation. II is sold for various |
purposes to builders and manufacture |
OrS. WGO Scth III lDpiS SsA3SAAS NAieAii ]
they do the sand of the seashore or OF
The bank Seashore or bank sand has
in the course of centuries, lost it's edges,
because the particles have constantly
rubbed against one another. Broken
rock sand, however. is very sharp. and
for cement and lime work is very de-
sirable.
SIX HUNDRED EXPERIMENTS
The pure ore is now allowed to drop |
downward and pass through room |
where blowers rid 1t of any dust |
which may have accompanied it on
IT'S travel. After leaving the blower |
room it is really a stream of pure, |
finely divided iron ore. which drops /
int, csnveyors and is carried to a |
store house, which holds 5000 tons.
Here it may rest temporarily, or il |
may pass ON by means of other con- |
yeyers TO the mixing house 1t cannot |
be smeFted in the form of iron dust 7
The force Of the blast would blow It I
from the furnaces. 1t must be made /
into briquettes, and in order to do TINS /
1t must be mixed with some adhesive
substance which Will prevent it from (
disintegrating when brought under the |
action of the furnace The mixing