Custer chronicle. [volume] (Custer City, Black Hills, D.T. [S.D.]) 1880-1890, 1888-11-03

forwarded land have il in my posses
sion a pamphlet giving a full descrip-
ton of the process, which is patented,
and at present used in many Of the
mines of Australia, and also IN Denver,
Colorado. 1t is called the Newnery-
Nautin process, and is guaranteed to
save 80 per cent of the gold and silver in
the ore, providing it is not smelling ore;
that is, ore carrying an excess OF lead.
| have read the description of the
process very attentively, and having
had some experience IN the working OF
ores of different character, | am prepared
to give it as my opinion that the process
ms described, is well calculated to make
a perfect success of our ores in and
around Custer and the Southern Hills.
The correspondence has reached a point
where the company are now ready TO
put our ores to the test. and they ask
that We serd 100 pounds Of ore samples
from mines that are large enough to
guarantee Il sufficient quantity to supply
a j0-ton plant with ore continuously.
They propose, should the ore prove rich
enough, and of sufficient quantity, to
! erect a plant OF that capacity we fur
nishing sufficient and suitable ground
for mill site. They desire to know also
| what the facilities are for wood and
! water, the cost of charcoal, the g%eologi-
cal formation in which the veins occur,
etc. 1t is required that the ore carry a
value IN gold and silver Of SIS per ton.
1t matters but little, according to their
representation, what the combination
| of base mineral may be: the process
takes it all ont. With your permission
| will nov read a few extracts from the
treatise describing the process.
Following is the extracts read:
In the Newbery-Vautin process the
manner of dealing with q material o II
tanning the metal is simple. The princi-
pal parts Of the machine are iew-a
hopper, c~hlQrinating barrel, teaching vat
or filter, reservoir for the liquid from
the filter, and the Observation-Disclosures.
The hopper is above the chlorination
barrel into this the crushed and roast
ed ore or talllngs are poured. The barrel
il made of iron, lined with lead, this
again with prepared wood it is sutlici-
emily strong to bear a pressure of 100
lbs. TO the square inch. In form il is
cylindrical, and in the centre are two
valves directly opposite To each other.
One valve Is sufficiently large TO allow
tie pouring in of a stream of tailings
sand the other is smaller, and is for
the introduction Of the compressed air.
The barrels vary in size according to
the quantity of ore required to be treat
Ell. The charge falls from the hopper
through the larger valve, when the re-
CURED amount is poured in chlorine
producing chemicals are added, com
monty chloride of lime and suiphuriC
acid sufficient water is introduced 50
that tle mass may assume a selni-llquid
state. The valve cover Is then screwed
down, and the barrel turned half round,
so that The small valve Is uppermost.
To this Ii attached an lndiaruDber pipe,
leading from an aIr-punlp. n com
pressed AIR Is forced in until a pressure
of about 90 los to the square inch is
reached, when the va'ye Is screwed
down and the hose disconnected. By
means of Il iriction-whcel, the barrel is
set revolving at a speed of about ten
revolutions to the minute; this brings
the chloride Of lime and snlphuric acid
into combination, and produces the gas,
which under the pressure now in the
barrel becomes liquid. and mixes with
the water, so that Il strong solution OF
chlorine Is in a continual state of agita-
ton through the ore. The gold con-
tanned in the ore, from its contact with
the chlorine solution, forms into Il
chloride of gold, and being soluble i'm
water, it becomes absorbed by the
LIQUID in The barrel. The time occupied
in reducing the gold to this state varies
according to the size of the gold grains
and the nature of the ore; with very
fine gold one hour should be sufficient,
bat in particular cases four hours may
be necessary. The ChlDrinatOr being
stopped, the hose is again attached, and
the compressed air, mixed With gas, al
lowed TO escape into lime water, to
prevent the inhalation Of amy disagree.
able flmes. The large valve Is then re-
moved, and the barrel set revolving as
before at every downward turn 1t dis
charges Il portion of its contents into a
shoot leading TO the leaching-vat below.
When almost all It's contents are dis.
charged a few buckets of water are
thrown in, which by the revolution OF
the vessel are sWirled around, thus com
pletely washing into the t~ilterali remain
ing solution. The filter is ar iron vessel,
lined with lead, with Il double bottom
to the lower part of this u pipe is con
neCted, leading to Vacuum-pump. When
the ore from the chlorinator has filed
the filter, the air is drawn from between
the double bottoms OF the latter, which
causes very rapid filtration. The filter
ell liquid is drawn off through n pipe
into a vat II continuous stream Of water
is kept playing upon the tailingS in the
filter, which by the suction is drawn
through them, so that all the chlorides
are washed out. To prevent any clog
ging of the material, the action of the
exhaust-pump is made intermittent.
The solution rs it runs to the vat being
continually tested, it is easy TO know
when the work is completed, then the
water is cut off. and the pump stopped.
The filtration generally occupies about
one hour. The stuff in the filter is
tipped into a truck running on a line of
rails below, by which means it is run to
the tailing-heap.
The liquor drawn from the filter con
tains gold in solution, lime, magnesia,
copper, zinc, &c, according to the nature
of the ore, also in all instances it retains
a greater or less proportion Of free
chlorine; this being a deterrent to the
decomposition Of gold chlorides, it be-
comes necessary to dispel it, which is
| .ln1n NV hlnutnn mir or Gtaupn thr,n,pb