Chemical Engineering February 2022 - 16

Focus
Focus on Particle Sizing
Learn more than just particle
size with this imaging unit
The Hydro Insight (photo) is a dynamic-imaging
accessory for
this
Malvern Panalytical
Haver & Boecker Niagara
company's Mastersizer 3000 particle-sizing
instrument. Through realtime
particle imaging, this tool helps
users to see beyond particle size -
powering more in-depth materials
research and exciting scientific advances.
Sitting alongside the Mastersizer
3000 laser-diffraction system,
the Hydro Insight provides live
particle images by combining Vision
Analytical's dynamic imaging expertise
with this company's flow-cell
technology. Based on these images,
it also generates quantitative data
on particle shape, alongside particle-size
data from the Mastersizer
3000. The combination of high-resolution
imaging with high-range laser-diffraction
data provides a more
comprehensive overview of materials
than laser diffraction alone, says
the company. - Malvern Panalytical
B.V., Almelo, the Netherlands
www.malvernpanalytical.com
Flexicon
Gericke USA
Elliptical movement for
high-moisture screening
This company has engineered a
new, elliptical-motion Niagara XLClass
vibrating screen (photo) for a
Brazilian iron-ore producer. The new
technology handles screening applications
with high-moisture content,
and can easily handle capacities
up to 3,500 ton/h while minimizing
water usage. The XL-Class runs in
an elliptical motion of up to 6 × g
in a high-moisture iron-ore screening
application to ensure stratification
in all phases of screening. The
new vibrating screen also features
a robust elliptical exciter drive that
offers a bearing life up to 75,000 h.
Iron ore contains up to 15% moisture,
and often behaves like a pasty,
clay-like material, prone to blinding
on a screen deck. The elliptical
motion and increased acceleration
of the XL-Class ensures that the
material is stratifying without blinding
or contamination. The ellipticalmotion
XL-Class vibrating screen is
available in a wide range of sizes,
in either a single module or tandem
16
Sizing-dispensing system for
abrasive bulk materials
A newly introduced sizing-dispensing
system (photo) for abrasive materials
receives, scalps, stores and
dispenses sand, rutile, zircon and
other dense, abrasive materials
on-demand, free of dust. Fed by a
pneumatic conveying line, the system
is equipped with an integral cyclone
that separates incoming solids
from the air stream. A rotary airlock
isolates the pneumatic system from
atmospheric pressure and meters
material into a vibratory sifter that
discharges on-size particles into a
surge hopper. With extended vertical
sides, the surge hopper stores up
to 19 ft3 (540 L) of material, enabling
the system's flexible screw conveyor
to dispense material when needed,
while reducing the number of on-off
cycles required for the independent
pneumatic-delivery system to replenish
the hopper with material. The
enclosed 10-ft (3-m) conveyor, with
curved, rigid carbon-steel tubing and
heavy-duty round-wire screw, can
handle a broad range of free-flowing
and non-free-flowing bulk materials,
from large particles to fine powders,
including
products that pack and
seize, with no separation of blends.
- Flexicon Corp., Bethlehem, Pa.
www.flexicon.com
Centrifugal sifters achieve
high throughput
GS centrifugal sifters (photo) automatically
separate powders, granules
and other dry, bulk materials into two
product streams at a throughput rate
up to 300% higher than common
flat-deck sieves on the same footprint
using identical screens, materials
and cut points, says the company.
Featuring a proprietary design with a
rotating paddle assembly, the sifters
direct fine particles through a mesh
screen and divert oversized particles
to the discharge using only centrifugal
force and gravity. The centrifugal sifters
typically achieve 99.9% efficiency,
versus 85% efficiency for flat-deck
CHEMICAL ENGINEERING WWW.CHEMENGONLINE.COM
FEBRUARY 2022
design. -Haver & Boecker Niagara,
St. Catharines, Ont., Canada
www.haverniagara.com
http://www.haverniagara.com http://www.malvernpanalytical.com http://www.flexicon.com http://WWW.CHEMENGONLINE.COM
Chemical Engineering February 2022

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