Fergus County argus. [volume] (Lewistown, Mont.) 1886-1946, 1899-10-18
Cor. stockton, MARKET snd Els .
Sss Frsaciscs. Gel.

and a cyanide plant was put in in
1893.
The crushing part Of this old mill
was a rock breaker and a Gillian
mill, where the wheels revolved on
stationary aXles, the bed travelling
under the wheels. the crushed ore be-
ing scraped back and forth over a
slotted cast iron portion OF the bed
about One foot wide outside of the
solid portion. over which the large
crushing wheelsrevolved. Thiscrusher
Is said to have handled satisfactorily
thousands of tons Of ore a year, and
would easily crush 100 tons Il day to
such Size as was deemed necessary for
successful teaching.
some difficultyin precipitation was
found when the mill first started, but
this was finally overcome and the
plant has been in operation almost
continually since, though it has had
Il very checkered career, principally
because of bad management. Some
years ago the property fell into the
hands of u New York SPECTATOR.
who soon wrecked the entire propo-
rltlt'I1. II tII'Il WI iltO u ItN'INtl -
hands. This gentl"man-Mr. Wood
bury-had a business head on him
and he operated the property. max
ing n financial success OF his trust.
T.. w. King, who had put in the
water works and the first electric
light plant at Great Falls, with l.. u.
Phelps, n banker OF that city, pur-
chased the property and n it fo-
some time. In August. 1898. they
parted with n two-thirds interest to
the Great Northern Mining Il Devel
opment Co, Mr.. King being retained
as manager. A new mill was con
structed at the mine. 1t il the larg-
est, finest mill In the state treating
ore by cyanide direct. The machin-
cry md engine room il 56XS4 feet, the
tank room 32x1S0 feet, solution room
16x30 feet, and the room occupied by
the extractors and for cutting down
the product by sulphuric acid 32y44
feet.
The ore enters the mill in cars d.
rect from the mine, the main ore bin.
back of the mill, as shown, being l9X33
feet, 26 feet high. From here it falls
onto an endless belt which conveysit
to a No. 5 Gates crusher. 1t passes
thence to n revolving dryer of the
usual type. The fuel used is coal, OBJ
tanned from a mine three miles dis
tant, but the company expects soon
to open a mine of its own within TX
miles. The coal costs So n ton, and
$50 pounds are required to dry 100
tons. The cost for drying il 2h rents
per ton, and the ore leaves the dryer
carrying 4 per cent moisture. The
dry ore il then elevated to the top Of
the mill, where ii falls on a grizzly.
Such ore as passes this grizzly goes
direct into the ground ore bin, which
has a capacity Of 100 tons. The ore
which does not pass the grizzly now
goes to two Gates rolls, each l5x30
inches, the oarse To one and the fine
to the other. The crushed ore then
passes to revolving trommels. from
whence such as passes A-inch round
holes il elevated to the c~rushed-ore
bin and the rejection goes again to
the rolls.
The teaching room contains six steel
watts, each ~ feet in diameter by 3
feet high. They are charged from the
~crushed-ore hin by an iron car driven
by n wire cable, and 30 minutes il all
the time required to load a vat with
the usual chargeof 70tOns. Seventy
two hours are given to each vatfrom
the time of n filling to the next.
OF this time II hours are required for
emptying. The leacled ore il dis
charged from the watts. through "A hole
in the center OF the bottoms, to cars
which are conveyed to the dump by
endless rope. On account of the pres
ence OF considerable kaolin and tale
in the ore and the scarcity OF water
sluicing is not deemed ad visable, hut
a mechanical contrivance for moving
the tailings by machinery IL beingex -
perimented with in an endeavor to
save shoveling and expedite the emp
tying Of the watts.