Bisbee daily review., 1912-11-10
Operations At CANANEA IS
RELATED BY DR.. RICKETTS,
-Cananea Splendid SuccessIn Annual Report Greene
and Growth Of That Property is Set Forth-Various
Mines of Company Have Continued TO Disclose Rich
Values as Development Has Proceeded.
COST OF PRODUCTION Is STEADILY LOWERED

4, win average nearer I per cent
The Overs. GIT mine has maintained
la steady production and much more
| first class smelling ore has been de-
veloped than was expected. At the
same time. this ore has come within
| the limits of the main ore zone. ana
| during the year the amount of ore
| developed has not equnled the amount
of ore than has been extracted from
the mine. Development in this mine
has net been pressed. but during the
| cnm:ng wear a further geological study
OF ore occurrence . III be made and
| development work will be rore ex
tenslve i is also Intended 10 leyelop
the old Esperanza ore body. which
contains concentratii& ore OF rather
how grade, hut WHICH should be profit
| able under present conditions The
veta .rande mine win &c oIen2c and
mining operations resumed daring the
latter part of the coming ye1r. For the
year -.Il il has been .t,lc The Kirk
mile during the year PRO ,aced about
q. ,0Gn tons Of ore. most o. which was
of a $ melting sr:Ce. There are no new
Developments OF importance in this
mine. The Cobre Grande Tine has
produced q notable quantity of ore
/ for converter lining and for smelling.
The old ore body is not adapted to
concentration. Rew body of concen-
trating ore has been found TO the
west II is of good grade. but appar-
emily not of large extent.
The tendency for the future is to-
ward lower grade matte. and | am
endeayoring to develop ores low in
sulphur 10 help raise the grade OF
the natte. With this aim in view
fouT-ffths interest in the Superior Bo-
nailza mine, situated near InIuris. So
nora. .ii.s recently bes:i bought. This
mine eds a .'iiciOus ore containing
sralI .iTantitias CT copper and notable
inanti,ies OF .I'7. Tails class OF ore
is needed to assist in fa'siLis the
rra,e OF the IgStte and Ia furnish
flux Ter the irca.
Cost Of Mining
The cost OF mining for the Cananea
Consolidated Copper company in 1911
was $2.46 per ton. as against S2.75,
S2.22. s2I3 and 1928 FOR the four
previous periods. Considering the fact
that the amount OF first-class smelling
ore VIII ch requires a certain amount
of selection and hand sorting, has
largely increased, consider this
cost as most satisfactory. The ton.
mage produced and the segregated
costs for mining at the various mines
are shown in the foregoing table.
The amount of development work
driven totaIed 51.7S4 II. of which SOC
IT, was shaft and 9S11 fl. was raises
4 s.~ty he
for the completed work was about IS.
The Concentrations.
The wooden tgs of Mill No. 2,
which have been in service for about
eight years, have rotted out, owing TO
the acid character of the water. Dur
ing the year almost all of these jigs
have been replaced by reinforced con
crete iigs, the cost of which has been
charged 10 operating expenses. Other
work has been done in the way Of
putting in drag classifieTs 20 separate
coarse sand from slime and very fine
sand without the use OF water. Many
small improvements have been made,
but none OF great magnitude.
During the year 52S.ll2 wet tons OF
ore was milled OF this, 5l5.199 wet
tons was produced from the COM
panys mines. and ll3,213 wet tons
was produced from the Cananea Du-
luth mine. The former had a concen-
tration ratio of 2.4O into 1. and the
latter a concentration ratio of SIT
into !. The operating and repair cost
was S0.UT6 per wet ton, giving a
total cost for the year of s0.722, The
average saving OF the copper in the
ore IN concentrate was 1853 per cent.
The new impoundjng dam for tail
ing is serving most satisfactorily, and
every pound OF failing. whether slime
or sand, is being saved, and there
can be no question but that the re-
elamation Of clear water from the tail
. ing pond is OF more value than the
cost of impounding the failing. The
concen'rators are In most excellent
condition. and in fully as good a state
OF repair as they have ever been in
their history
Mining and Reduction
The copper costs for the past yea
we're az follows:
Per ID Of
copper
Gross costs, (. o. b. Cananea SO.s956s
marketing, etc ........ 0.01343
Total costs ............ $0.10e1l
Credit:
Value of precious
metals .SOOl55S
Miscellaneous rev
enues go. Co.. 0.904s4
Total credits 49,. .0-0iS23
Total cost. cue copper sold .so.ososs
Construction ...-- ....--.. o.00fo5
y009s4S
The total cost Of pipipg aud treat
/ ing Q ton OF ore. Including every
Confined on Page .