E Q U I P M E N T G A L L E RY
Magnets Remove Grinding
Media Metal from Ore
Eriez claims its trunnion magnet separators
effectively remove up to 98% of grindingmedia steel balls and ferrous chips from
milled ore in SAG or ball mill operations.
By eliminating these potentially destructive
pieces, damage to downstream equipment
is significantly reduced. Positioned at the
downstream end of the mill, the trunnion
magnet consists of an arc of permanent
magnets surrounding almost half of a blind
trunnion extension. As the trunnion rotates, the magnetic circuit attracts and
holds the steel balls to the inner surface of
the trunnion. The steel balls are carried to
the top of the trunnion where the magnetic arc terminates, thereby releasing the
balls, which fall into a hopper and chute.
Given mill capacity, ball size and other
parameters, Eriez will select and specify
the appropriate construction features for
its trunnion magnet installations.
www.eriez.com
Measurement for Hightemperature Storage Vessels
BinMaster Level Controls introduced the
3DLevelScanner HT for measuring volume
and mapping material surfaces in bins,
tanks and silos with high temperatures.
This new model of the 3DLevelScanner has
an operating temperature range of up to
356°F (180°C) to accommodate high temperatures that may be present when material has been heated in the production
process before it is conveyed into storage
silos. The device measures the material
level in multiple locations in the vessel and
estimates the volume, and is claimed to be
ideal for use where there are multiple challenges such as excessive dust or high
www.e-mj.com
humidity, as well as
in very large silos
where the material
surface in the bin is
irregular and difficult to measure.
The sensor sends
pulses in a 70°
beam angle, taking
multiple measurements from the
material surface and
continually mapping
the material surface
to detect changes in
level, account for
uneven surface topography, and calculate a highly accurate volume estimate for the contents of the silo. The
3DLevelManager software reports the lowest and highest points detected and the
average level based upon a weighted average of all of the measurements detected in
the bin. For the MV and the MVL models a
color, graphical representation indicates
where high and low spots exist in the silo.
www.binmaster.com
MARCH 2013 • E&MJ; 85