The copper era., 1903-03-19


=. Sterling boilers The water for
boilers and mill work will be forced
from wells near the river by an cleo
trically operated triplex pumps OF 800
gallons capacity per minute. The
9xlj Blake crush Is operated al the
ore bins. It reduces the ore TO egg
size and finer. From the cru-her the
material is carried by Robins belt
convcyor 22O feet to the foot OF an ele-
vator at the head OF the mill. 1t i
thence delivered to trommcls OF four
sizes. viz, 5-S, 5-l6, 3l6 and inch.
The oversize from the first size from
mel passes to set OF lGx36 rolls; the
oversize from the other three goes to
Jigs Of various sizes. The undersizcs
from the first three trommels each 90
TO a set OF jigs suited to its size. The
finest trommel undersize goes TO
hydraulic classifier, which is divided
into four apartments by which four
sizes are made that pass. to the finer
Jig. All the jig tailings, from 5-lG-
inch down are regrOund in the Hunt
ingtOn mills, whose screens are l-2JX!
inch size. The Huntington product
passes to twelve tables. There are six
other tables which handle the overflow
material from the cla,-iiers. The
tables which handle the coarsest from
the classifiers have corrugated sur
face, the others being straight-faced
belts. The final overflow water i set
tied and clarified in tank G0xl2 feet
in size, with fifteen divisions. The
settings here are drawn off at the bot
tom and the clearer water is pipcd
back TO the head OF the mill again
The ores to be handled comprise
copper and iron pyriteS and copper
glance. 1t is expected to concentrate
about FIVE tons into one ton. The jig
products will be in six sizes. The
other product will be from the tables.
These Jig aud table concentrates will
be mixed the smelter charge floor with
copper oxides and carbonates which
come direct from the mine. The
tables in the mill consist Of eighteen
Fruc vanners and two Standard tables,
both styles to be used for the same
class OF work-that is, there will be no
recOncentration.
Both smelter and conccntrator will
doubtless be in operation within the
next thirty days. The smelter pro-
duct will be Il copper matte, which
will be sent to the plant of the Ari-
zona Copper Company to be resmelted
and converted. II. ). Anderson is now
manager OF the Shannon Copper CoTa
pany. The mine Of the Shannon Cop
per Com pany is near Metcalf, which is
about seven miles north from Clifton.
The latter place is on the San Fran
cisco river where Chase creek empties
into it. Metcalf is on Chase creek and
the Shannon mine is on Il mountain
spur between Chase creek aud King
gulch. The Arizona Copper Com
inch Suage, extends from Clifton mp
Chase creek to Metcalf ON this line
regular trains are run. doing passen-
ger and freight traffic, besides hauling
the ore from the y. c. company mines
and that from the shannon mine to the
smelters at and below Clifton.
The ore is conveyed from the Shan |
non mine to the shipping bins on the /
railroad at the bottom of Chase eulrh. /
The incline is LOO feet in length, the /
vertical distance between the lower !
and upper terminals being 500 feet |
This incline is a surface tramway with .
three tracks over which about 1000 /
tons Of ore could be lowered daily. I
Ten-tOn cars, attached To cables. opcr- /
ate hereon by gravity, the loaded car
down pulling an empty up. At the I
heading of this incline is a set of load /
ing bins which receive ore from the f.
main doIbIe track tunnel in the mine. /
At point on the incline, l6S feet be- /
ow the head, are other bins which /
receive ore from the lower tunnel that .
by trackage with those bins. /
Thus the ore from the two main tun- /
nels is conveyed direct to bins which (
unload into the incline cars.
The main double track tunnel is .
about 500 feet below the apex Of the !
mountain. It. runs 200 feet and ter .
inmates at the surface on the opposite
side of the mountain. From this tun-
mel drifts have been run in all direc-
,ions, many of them to the surface
Sy this method the ore has been thor
>ughly blocked out and exposed. Also
rom this level many raises have been
made TO the surface and Slopes opened,
Ill the ore thus mined being passed
through chutes to the main double
rack tunnel. The stopped out ground
5 timbered up l2xl2 square sets. One
'tope showed an ore body 3l9 feet wide
1t one point. At the same place the
'tope was worked out thirteen sets
nigh. All this work shows an irregu-
ar formation. with almost every
'ariety of copper ore, which exists in
pockets, kidneys, chimueys and shoots.
This mountain, which is opened from
III sides, has Gaping OF hematite OF
'arying thickness which is said tu ,
Iverage about - per cent iron. This
: especially valuable as a flux at the
meltor. Within the iron Gaping are
he regular pockets of copper carbon
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