The Wallace miner. [volume] (Wallace, Idaho) 1907-current, 1918-05-02

H. A. Guess, and soon afterward
others were put in at the Greenhill-
Cleveland and at the Morning mills,
properties Of the Federal company.
These were all single-spitz Janney
machines equipped with litter pipes.
but instead of scrapping these mach
ines, as was done at several other
places because the litter pipes would
not elevate anything except slime from
the bottom of the cells, the Federal
company remodeled it's Janney mach
ines along the lines suggested by Mr..
Guess at the Federal mill at Flat river,
Mo-, took out the lifters and connect
ed the spitz-boxes with the impeller
chambers by 6-inch pipes. The pipes
lead from the bottom Of the spitz-box
of each cell to point directly under
the impeller shaft of that compart-
ment, at which point there is sufficient
suction to draw any granular feed that
Is likely to get into a flotation mach
inc. Some time later double-spitz
Janney machines were added at the
Hercules mill to handle the granular
slime, and about year ago the jan
ney pyramid machines were installed
at the Interstate Callahan mill near
the head Of Nine Mile canyon
Since 1914 a number of flotation
machines have been evolved in the
district itself. At the Hercules mill
machine was devised with series
of small air-lifts that lead off from
a central header over the top of the
cell, Callow box without the pneu-
matte bottom. At the end Of this
roughing cell is small Independent
cleaner cell equipped with a Callow
pan to produce the froth. Along this
cleaner" cell runs longitudinal trav-
cling belt having scrapers for skim
ming off the top of the froth as fast as
1t rises. This machine avoids the in
conveniences that result from the
binding of the cloth on Callow pneu
matte machines, and it also does away
with the interference in the operation
of the plant that occurs in a small in
stallation when a machine has to be
shut down to change bottoms. The
pipe" machine has the disadvantage
that the adjustment of the air going
to one of the pipes throws the whole
set out and requires the readjustment
of the other pipes. The work of the
cell, as a consequence, depends upon
millman.
CaIlow Tests at failing Mills.
At one of the Crerar-Hewitt failing
mills Callow cell feet wide by 1e
feet long. with flat bottom and other
notifications, is being used. At the
!, Tamarack mill air-lift columns have
been added to spitz for a collector
and a machine of promise has been
evolved. At the Bunker Hill & Sui
livan mill the Bunker Hill machine is
used. This machine consists of spit2
collecting chamber with Y Inch GEN.
trifugal pumps connected to it and
, used to circulate the pulp through the
cells into which the spitz or V-box is
divided. The pumps are constructed
with special bushings so as to min
mize the wear on the shafts. The
upkeep on this flotation machine is
consequently not so large as might al
first be thought. The machine has
the advantage that it has less vio-
lent and more closely comfortable
action than have some Of the others
The other distinguishing feature Of the
Bunker Hill machine is the use in each
cell Of travelling belt carrying scrap
ers that drag the top froth up an in
clined lip in discharging it. This re-
suits in the production of clean con-
centrate without close attention on the
part of the attendant. The machine
has also a positive regulation Of the
water level and an air life discharge OF
the tailings, SO that there is not the