37
d
&
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MAY-JUNE 2015
AGGREGATE
WASHING
eliminating the requirement for settling
ponds.”
TheprojectCDE completed inStuttgart
for FeessErdbau in2014 (see box story)
included several innovations – this iswhere
its newR-Series primary screeningunitwas
introduced. TheR2500was employedon
this project. CDE’s rangeof Infinity screens
for aggregates and recyclingoperations has
alsobeen significantlydeveloped in recent
months and the companyhas been awarded
apatent for the Infinity rangebasedon the
unique constructionof the sidewallswhere
there are zerowelds. Theseprovide a stronger
screen that requires less power togenerate the
same acceleration and therefore results in a
significant reduction in thepower required
tooperate the screen. This range includes
severalmodels including5x1.5m and6x
1.8mdouble and tripledeckdry and rinsing
screens. The Infinity screendesign system
has alsobeen introduced to its range of
dewatering screens and there are threenew
screens available in this range.
Finally anewAquaCell thickenermodel
has been introducedwhose footprint is in the
formof two12.2m (40 ft) containers stacked
on topof eachother on site. This significantly
reduces space andCDE’s new sludge
concentrator ensures a consistent sludge is
delivered to the sludgemanagement phase
that optimises performance of the system.
■
Washing goes compact
Haver & Boecker has introduced the Tyler
Hydro-Clean, which is available in three
sizes covering the 18 to 360 tonnes per
hour range.
Material as large as 150mm is fed
into a rotating vertical drumwhere it is
cleaned with high-pressure water jets at
pressures at up to 2,000 psi (140 bar).
The system can use asmuch as 90%
recycled water from previous washes and
removes clay particles as small as 63
microns.
The system is very compact compared
to traditional washing systems and Haver
& Boecker says it also uses significantly
less water and energy than traditional
systems. The company says the ideal
application is clay-heavy material deposits,
and the combination of rotation, high
pressure water and the aggregates
rubbing against each other makes for a
superior clean because clay particles are
more easily dislodged from hard-to-reach
parts of the stone.
Haver &Boecker’s Tyler Hydro-Clean is said to be
smaller, lighter andmore energy andwater efficient
than traditional aggregateswashing systems
Wash plants typically reuse up to 95% of thewater
used in the process
Collecting organicwaste – the
washing process floats off lighter
components of thewaste feed,
including paper, plastics andwood
