The Eureka sentinel. [volume] (Eureka, Nev.) 1902-current, 1912-06-01
MINERAL HILL MILL OPERATING
The Consolidated Mines Company
Starts New Mill With a Large
Tonnage of Ore

north Of here in Eureka County, this
week, and through the kindness of s. O.
Pratt, president Of the Mineral Hill
Consolidated Mines Company, obtained
the following information concerning
the operations of this company in that
once thriving mining camp:
New Company Takes Ooer Property
The largest producers among the old
mines were taken owe by the Mineral
Hill Consolidated Mines Company six
years ago next August. and considerable
development work has been done since
that time. The mines we're opened in
the early 70's. and produced something
over S6. 900, 900 in values during the time
they were her worked. The ore was
taken out through open cuts. and q depth
of not more than 100 feet was reached.
The new work has beer lone on q much
more extensive scale. One tunnel Of
TAB feet and another of $40 feet have
been driven for the purpose of getting
out the ore more readily, besides other
development work having been done.
Upraises have been made at several
points tapping the ore bodies. and when
operations commence the ore will be
tax en- out through these tunnels.
At the time this company took over
the property 1t included an old mill. store
buildings. bunk houses and other build
ings that had been used by the former
operators. All Of these were in a more
or less dilapidated condition. Nothing
of consequence was done toward re-
modelling the mill and repairing the
buildings until last September, when a
crew of men was put at work in prepar.
alton for extensive operations. Since
that time over 600 tons of freight has
been hauled from Palisade, a distance
of 30 miles, most of it being machinery
for the mill. The company has put mp
a new boarding house, rebuilt several
of the other buildings and erected two
houses. six cabins, and have two other
new houses under way. The railroad
is being depended upon to haul the
freight as far as Mineral Station, and
the company now has over 80 tons Of
supplies at Palisade awaiting shipment.
Large Tonnage Ready for Reduction
When the operation of the old MILL
was discontinued there was q consider
able tonnage of ore remaining unworked
and the new developments have in
creased the quantity to about 10000
tons now ready for the mill. The ore
will be handled through the tunnels and
transferred to the mill by means of a
gravity tramway, over a distance Of
about 1000 feet. About 800 feet of the
tramway is trestle work, some Of which
is A feet in height. The tramway has
been constructed with the greatest care,
and is one of the most substantial of it's
class to be seen in any of the mining
camps Of the State. The cars weigh
about one ton each and have a capacity
of three tons. The car that comes down
loaded will draw the empty car back to
the mine ore bins.
The tramway cars deliver the ore to
two gyratory crushers, the crushed ore
falling into ore bins of 600 tons capacity.
Four Challenge feeders are used to take
the ore from the bins to the stamps and
rolls. The 10 old stamps used by the
former operators have a capacity of
about 30 tons, and the rolls, which are
of the rev Cornish make and will grind
to four mesh, have a capacity of $50 tons
daily. The product of the stamps and
rolls is delivered to two No. 6 Monad.
mock Chilean mills, where it is further
p~ulverized to 80 mesh. This product
then goes to the ten Wiley concentrat'
ing tables, where about 40 per GEM OF
the values are taken but in the concen-
trates. The tailings are then lifted by
a centrifugal pump to two Dorr CLASH
fiers in the top of the concentrating
building, where a separation Of the sands
and shines is made. The sands run by grav
ity through an automatic distributor In
to the sand tanks, at which point eva.
hide solution is introduced and the
usual method of sand filtration follows.
There are six of these sand tanks, each
being 5x15 feet. The slime product
taken from the Dorr classifiers is de-
livered to a Dorr thickener, where the
pulp is de watered. The baby tank OF
the building is l2x35 feet.
The dewatered pulp is run through a
launder to a three steel agitation tank,
l0x15 feet, and agitated by compressed
air in cyanide solution for about sz
hours. Following this operation. an
other centrifugal pump delivers the agi'