The Salt Lake tribune. [volume] (Salt Lake City, Utah) 1890-current, 1911-06-26
SALT LAKE TRIBUNE MONDAY MORNING, JUNE &c. 1911
TECHNICAL SIDE Of
JAN|VEY CLASS|F|ER
New Mill Equipment Being Used
by Many Companies of
the West.

One OF the recent improvements in ore
dressing bearing the Utah brain ma rll
Is the Richards-Janney classifier which
Is coming into extensive use throughout
the ore concentrating west. In the En-
eineering and Mining Journal is given
technical description OF this cassifier
which doubtless will prove OF interest 10
the western mill men. This follows.
This classifier is made up Of a series
VI rectangular compartments OF success
INeS Increased size and stepped down
Sradually from the feed end. The COM
pInauon OF side inclination and stepped
Gown successive compartments creates a
DIVISION between each TWO compa rtments
! ne iower part of each compartment is
inverted cone and constitutes the settling
chamber Attached to the bottom OF
each compartment is cylindrical sort
ing chamber. the lower end of which Is
attached 10 the hydraulic chamber. Be-
tween the hydraulic and sorting chambers
-, d "cil protected glass sight tube.
Inc hydraulic chamber is in the nature
OF tee OF rectangular section and Is
tapped for the hydraulic inlet. This inlet
IL governed by gate valve with an indi-
Gator, showing the position OF the valve.
a large Hanged end. tapped TO receive the
inner valve-seat bushing. Attached 10
lhis Hanged end is an Inverted cone
shaped retarding chamber. the apex OF
which is tapped TO receive the outer
bushing. The retarding chamber is pro
Flded with an air cock.
y vertical sideboard extends the full
length OF the clsssifier on top. the feed
met and overflow outlet being a few
inches below the top OF the sideboard
AboNe each compartment and well sup
ported BY framing is a cast-iron box with
housing for the driving mechanism. The
bearing of the spindle is securely at
lached to the base of the bar and extends
DOWNWARD through the supporting frame
The spindle is hollow. extends downward
INTO the center of the sorting chamber
ana carries a series OF sorting blades
~ y, worm wheel is Tiveted TO the upper end
OF The spindle and engages with worm
on the main horizntsl shaft. Cams are
attached on top or the worm wheel TO
raise and lower the valve rod intermit-
tently.
The valve rod extends through the hol-
low spindle and is fitted at the lower end
with rubber valve. which seats on the
inner bushins in the hydraulic chamber
a bushns in the upper end of the spindle
holds the valve rod central An arm Is
ntted TO the upper end or the valve rod
and IN engaging with the, cams on the
worm wheel opens and closes the dis
charge valve.
The ease or the replacement OF parts
rs a feature OF the classlfier. The valve
roo can be removed entirely. The spindle
or sorting blade shaft can be raised out
OF lis compartment and vlocked up for
Internal inspection. The inner bushing
can be reached easily by removing the
retarding chamber.
The worm shaft revolvcs from so 10 90
rpm, The hydra ulIc water is turned on
the feed enters the classifier. the sort
ins-plade shaft turns and loosens the
pulp without any raising the waive rod
opening the valve. releasing the mate
rial through the inner bushing into the
retardinS chamber. The retarding cham
Der fills with sand. and the valve drops
closing the inner husins. The material
flows steadily from the retarding cham
Der, through the outer bushing. and
when tho chamber Is empty. the .classi-
fier Is ready for the next cycle
These claSsfiers are being made nv
The Aliis-ChalmerS company and have
been Installed at the Magma and Arthur
plants OF the Utah Copper company. at
the, Ray Consolidated and the Lettlc Bel
mill