Gilpin observer., 1909-10-28
Casio MILL
IS OPERATING

Adjustments at the new Casio
mill on Winnebago hill, owned and
operated by Alfred Anderson, were
perfected last week and the plant is
now in steady operation and running
at capacity Of 25 tons a day. Ore
from the Caste has been run and last
week 5O-ton trial on Druid ore was
made. The ore was $500 stuff and
there was no showing on the copper
but it concentrated we'll, going two
into one, the concentrates assaying
$1,000 to the ton. The Horn table,
which worked the shines, saved IA
ounces silver to the ton and "a
ounces of fine gold. The gold would
have been lost without the sinner as
that would have followed the water.
This week the mill Is making test
run on dirt from the o. X. mine.
This is ore that has been handled by
other mills but would not pay. 1t is
not only ore of low grade but the
values are mainly in copper and sill
yer and will be a good test for the
new mill. 1t will determine what the
plant can do with silver and copper,
which has been a difficult problem
for mills Of less modern construction.
II the method of ore treatment be-
ing followed by the Casio will save
the values of the o. X. dirt, then 1t
is virtually a settled fact that the o.
X. company will put up similar
plant to handle their own product.
Preparations are being made to run
the Casio dump. A track Is being
laid from the dump to the mill and
the car used to convey the dirt will
be pulled by an electric driven cable.
The dump assays $500 to the ton.
Where this ore can be had without
the expense OF mining. Mr.. Anderson
says it can be made to pay fairly well.
That such low grade dirt (Which has
been classed as worthless) can be
treated at a profit by a mill in this
county is almost unbelievable.
The method OF handling ore by this
new mill is entirely different from
that Of any other in operation in the
county, although the principle may be
similar. The ore is treated more
thoroughly with the purpose of saw
irs the values from the time 1t is
fed into the crusher until the shines
are relieved OF every particle OF
metal.
The ore is crushed to half inch
into the bin right under the crusher
It passes through McFarlane gate
10 an automatic feeder. which feeds
direct to the Denver Quartz mill, a
new machine of recent invention
This mill has six rolls Of 800 pounds
each which revolve at the rate OF AZ
revolutions per minute. These rolls
run in groove or round mortar
crushing on three sides. Surrounding
these rolls is a screen Is feet in cir
cumference and two feet high. The
mill discharge is eight feet After be
ing crushed to a 40 mesh the ore
passes over an SIS feet copper plate
and then passes through two Swair
classifiers, the course being delivered
to two Swain tables and the shines
to the Horn sinner, which has giver
better satisfaction. according to the
mill men, than any sinner ever intro
duced into Gilpin county. The water
after 1t has passed over the tables
is consigned to three large settling
tanks and is then pumped back into
the mill to be used over again. b,
this arrangement very little water 1!
required.
Numerous mine operators and mil
men have visited the Casio mill ant
pronounce 1t by far the completes
they have yet seen in operation II
this district. Mr.. Anderson has ex
pended quite sum OF money will
ro assurance of the mill being q praC
teal success other than what the pre-
l!minary tests and experiments show
ed. He Is well pleased with the plan
and is confident his money has beei
wisely invested. His mill will saw
from 30 to 95 per cent and mil
that can do that in this camp Is GO
ing to make money for the mill own
er and save money for the mine oper
at