Gilpin observer., 1909-08-05
LOOKING FOR
A MILL SITE
WORK ON CYANIDE PLANT WILL
BE COMMENCED As SOON As
SUITABLE LOCATION CAN BE
FoUND-MoNEY FOR PROJECT
PRACTICALLY ASSURED.

Not a moments time has been lost
by Messrs. Draper and Alsdorf, who
have been working perslstentIy on
the cyanide proposition since announ-
cement was made In the Observer
several weeks ago that exhaustive
experiment had demonstrated that
the ores Of GiIpIn county are amen
able to eyanIdatlon and that steps
would be taken toward the early con-
struetion Of a plant. The work thus
far accomplished by these gentlemen
and their associates, though Of a
preliminary nature, has been re-
suItant Of much good and they have
had sufficient assurance from fInan-
cial sources to induce them to give
the selection Of 4 miIisite their i'm.
mediate attention.
The bulk Of the mine owners Of the
county have taken a decided interest
in the proposition and are lending
every encouragement. Or. Traphaeen,
professor in metaIIurgy at the School
Of Mines, has made q trip to Central
to investigate the proposition. It 10
presumed that he was sent here by
prospective Investors. He expressed
himself az satisfied with the feasibiIi-
ty Of the cyanide practice intended
and said he could sanction every
thing said In the reports Of the min
Ing engineers covering the proposed
plant.
Money for the erection Of the mill
seems to be absolutely assured. East
Interested but the promoters want
the local operators II possible to erect
and control the mill. II the project
cannot be financed among the mine
ownsrs and operators Of the county
outside capital, Of course, will be en-
listed.
Engineers strout and Gross who
assisted Draper and AIsdorf in their
tests are In the city aiding in the
selection Of a miIlsite. They antiei-
pate that the location Of the mill will
be agreed upon and that excavation
will be started within thirty days.
II Is very likely that work will also
he started within the next month on
the pole line to extend from a point
where the Hydro-EIeetrie company
wires enter the county to the plant.
Il 10 estimated that six months will
be required after the commencement
on construction work until the mill
10 completed and ready for opera
tion.
Some idea Of the practice to be
adopted and the equipment Of the
mill 10 found In the report Of Messrs.
Strout and Gross, In which is sub
nitted preliminary plans and an esti-
mate Of the cost Of 4 3oo-ton plant
which Il 10 proposed to erect:
"These plans call for heavy rapid
drop stamps, which might be con.
sidered another innovation, possibly te
be met with criticism; they have,
however, the advantage Of 4 large
reduction, which must be the aim In
all successful milling operations. The
advocates Of the old style, light, slow
drop stamp being essential to rseov.
cry by amaIoamatlon on GiIpin ores.
have not the slightest foundation 70
base their arguments on; the ten.
deney In modern practice being to
ward heavy stamps, Increasing In
their duty without proportional In
crease In stamp cost; II 10 Of inter
est In this connection to note that
South African practice 10 the use ot
1900 pound stamps, bringing the
stamp duty to approximately 9 tons
per stamp per "a hours.
1.-THE fact that the gold that 10 n
all susceptible to amalsam alton, Il
most readily %, the plate length oi
12 feet a. used by your company
has been duplicated In these plans;
the fact that any fine gold passing
this length Of plates will be rseovsrs'
In the following cyanide process
adds to the safety Of the design In
total.
"oood concentration not being pos
slbls without good classification pre-
esdins, the Richards eiassIfIer, which
combines email space, large eapaeIt,
and effective work, has been lneIud
ed a. 4 necessary feature, the sllms'
from which, 90 At once to the slimt
eyanIdation process, doing away viii
slime concentration, which 10 nsvsI
quite satisfactory; the eoarssr ma
tsriaI going to the whitley eenesntra