The Eureka sentinel. [volume] (Eureka, Nev.) 1902-current, 1922-03-04
NEW MILLING PROCESS
FOR EUREKA DISTRICT
Metallurgical Staff of John H.
Hammond Reported to
Have Worked Il Out

Nevada Mining Press: After al
most two years marking time, with
shipments and development reduced
to a small scale, Eureka appears to
be on the verge Of an era Of great
activity on a solid basis. The most
important single item bearing on the
accomplishment at an early date OF
big things In the district is the re-
ported working out of a process for
the treatment of the carbonate lead
silver ores of the mines by direct fo-
tation. While nothing definite has
been given out, is known that for
more than a year metallurgists nm
anced by John Hays Hammond have
been working on ores from various
Eureka mines, and 1t is stated in min
ing circles that q process has been
perfected which will be introduced
soon at one of the Eureka mines.
TWO MINES PLAN MILLS
That reduction works of some type,
or types, will be built in Eureka this
year Is assured. The Eureka-Holly
has announced that chang
es will be made in its pilot mill as
soon as weather conditions make 1t
practicable to undertake the work.
The Uncle Sam mine in the south end
of the district has worked out a COM
bination of concentration, fiotation
and c~yanidation and officials state
that finances have been provided to
build a mill at the mine. Three eng
ineers reporting on the Eureka-Croe-
sus last year recommended that the
company build a smelter of sufficient
capacity to treat its own and custom
ores. Notwithstanding this recon-
mendation, 1t is understood that the
directors favor milling the low-grade
ores.
LARGE DEPOSITS MILL ORE
There is probably no mining Sec
ton anywhere in this country that
has anything like the huge tonnage
of low-grade ore developed which ex-
lists in the Eureka mines. There are
literally hundreds of thousands of
tons of oxidized lead-silver ore in the
old mines, in place, as stope fills, and
on dumps. 1t is recognized that the
real profits of mining must come from
the treatment of the low-grade, rath-
er than from selective mining and
the shipment of high-srade. Both
the Eureka-Croesus and Eureka-Hol-
Iy companies shipped a certain
! amount of high-grade while develop
ing but the last increase In freight
, rates, higher smelter charges and
lower prices for lead made this prac-
tice like swapping dollars. The Hol-
ly has closed down and is now prepar-
ing to try out the new mill process.
Croesus, released from its
former extravagant management, has
been reorganized and is believed to
be in good financial condition. Re-
ports from New York indicate that
the company will soon adopt a plan
for reduction works.
SECURES HAMBURG NINE
The Uncle Sam mine In the Pros
pect Mountain section has made rap
i'd strides in development during the
past year and recently acquired the
old Hamburg mine, an adjoining
property that produced heavily many
years ago. The main adit Is being
advanced to get under the old Ham
burg workings which should be
reached in about 60 days. In the
meantime the company has opened
deposit of shipping ore in the tunnel
and is raising in the orebody to con
meet with the Schneider shaft fol
ventilation. The better grade of ore
extracted in this work will be shipped
when road conditions permit hauling
to Eureka. The company has beer
we'll financed to date and has an ex-
cellent plant at the tunnel, installed
before Winter set in.
The New York office of the Eureka
Prince Mining Co. has announced thai
new officers have been elected and
that work will be resumed at the
mine ON Adams Hill early In the
Spring.