Tonopah bonanza. [volume] (Butler City [i.e. Butler], Nev.) 1901-1909, 1907-08-31
'BOSQUI PROCESS
IS GREAT SUCCESS
GREAT ECONOMY IN TIME Avn
BIG SAVING OF
VALUES.

The success Of the Montana Tono
pah mill has been thoroughly demon
strated, and F. l.. Bosqui, the do
signer, will leave for Goldfeld fiji.
morning, and from Goldfeld taka
passage for San Francisco this even
ing.
The mill has attracted the atten.
ton of a great many mill author,
ties who have visited the Montan.
Tonopah during the past week. ana
with n accord have pronounced The
plant perfect in every detail. Ro.
cause of the inability of the Nevada
Power Company to furnish sufficient
power, there are but twenty stamns
of the forty, the full capacity Of tbo
mill, running, The power companv
Is putting in a new line as fast a.
the work can be performed, and tbis
will be for the accommodation of tho
mines in camp, independent of powe,
that is furnished to the city.
When the forty stamps are drop.
ping, it will mean an output from the
mine of two hundred tons every
twenty-four hours. At present, with
twenty stamps dropping, the outnut
Is n hundred tons a day, or about
five tons to the stamp. The mill has
taken about a year for its construc.
tion, and the cost has been a little
over 100000.
The construction of the mill was
a greater undertaking than the ma
jority of people have any idea of.
There was a great deal to be over.
come before success could be obtain.
ed. The character of the ore made
It necessary that a great many tests
be made an dthe matter was finally
put into the hands Of f. L. Bosoui
one of the best cyanide men in the
United States. After he got hold of
II, he was six months making his
tests, At the end Of that time he
submitted them to the company and
they were officially accepted. The
Montana Tonopah ore differs from
that of the Tonopah Mining Com
pany, the former being sulphides and
the latter oxidized. The ore of the
Montana carries anthony, arsenic
and zinc, and 1t is necessary to con
centrate very thoroughly in order to
make the cyanide process effective.
In the plant Of the Montana Tono-
pah teaching in tanks is done away
with entirely, and all the indications
from the results of tests and the op-
erations in the mill are that eighty
five to ninety per cent can be saved
in twenty-four hours from this ore.
which would require by teaching,
from ten to fifteen days. Tube mill
ing. which Is included in this sys-
tenn, while it has been practiced else
where, this, so far as is known, is
the first instance where 1t has been
applied to ore carrying so much sill
yer. The average grade of the ore
is twenty inc of silver and about
81 in gold. Thus the value of the
ore coming through the mill would
be about 1850.
The ore is elevated from the crush
er to the mill bins by a belt con
veyor, after it has passed through a
No. . Gates and further reduced 10
a No. 2 and a No. 8 Gates crusher.
The ore is concentrated on Whitley
tables and passed through two 5x22
feet Gates tubemills. 1t is then re.
concentrated before passing to the
cyanide plant, having been reduced
to about $50 mesh, and the conceE-
trates practically removed. The
concentrates go to the smelter. The
slimed ore is treated with a cyanide
solution in six Hendryx agitators for
twenty-four hours, after which is K
filtered in a Buffers vacuum filter,
and the solutions leaving the filtered
ore precipitated on zine dust in the
Merrill precipitating presses. All the
gold and silver extracted in the cy-
anide plant Is by this means precipl-
tated on the zinc dust and held in
these presses.
In the construction of the mill,
great credit for the fine work is due
to John Horgan, chief of construc-
ton for the Montana Tonopah, ard
the satisfactory wiring of the build
ings for the electric power is due 70
the work of Leon Cummins of the
Nevada Power Company.