Impact Classifier Mills
Powerful for Sharp Top Cuts
Impact classifier mills serve for dry fine and finest grinding
of brittle materials with a hardness of up to 3 Mohs.
The impact fine sizing mill ICM combines the efficient
impact milling with the efficient classification in a single
The fed materials are thrown by the milling tools at a
speed up from 60-130 m/s into the liner and are afterwards
size reduced. Following the ground material is
transported to the integrated classifier for separation.
The fineness is then infinitely adjustable over the classifier
revolution speed. Particles that are too large are
rejected by the classifier and returned to the milling
zone for continued size reduction.
The throughputs for the 25 diverse sizes are between
The advantages of the ICM impact classifier mills are
found in the creation of a steeper particle size distribution,
the proven DD Direct Drive Concept, the heavy
duty design as well as the easy handling and cleaning.
The scope of application covers powder coatings
including chemical products up to food and sweets.
A New Generation
for Pendulum Mills
The pendulum mill, a type
of roller mill, is suitable for fine
grinding and drying while grinding
of minerals, clays, pigments
and chemical products.
The mill comprises of mill housing
and a rotor with a crosshead and
pendulum, which rotates with a
circumferential speed up from
6-8 m/s around the vertical miller axle. Centrifugal
forces, which are thereby utilized, have the effect of
crushing the materials between the grinding rollers
and grinding ring.
A rotating shovel is positioned in front of every pendulum,
which carries the fed milling material from the mill
base into the grinding zone between the grinding rollers
and the grinding ring.
Both the coarse and the fine milled materials are then
carried by the air flow from the grinding zone to the
classifier wheel, which can be continuously adjusted to
the required particle size. The coarse product is
displaced by the classifier and falls back into the
"First over the Line - is the Winner"
NEUMAN & ESSER started in the 1930's to also
become involved in milling equipment manufacturing.
When looking back it was a clever step to take,
because NEA Grinding and Classifying Systems
belong today to the leading manufacturers of
pendulum roller mills and impact classifier mills.
Close to 80 years experience in mechanical processing
technology and the continuous dialogue
with clients form the principles for the high performance
and quality level of NEA milling and classification
Client close and innovative power paired up with
flexibility underlines the continuous readiness for
The product program comprises today of impact
classifier mills, pendulum mills as well as cyclone
collectors and air separators for coarse and fine
Tests are implemented in the spaciously dimensioned
test center, so that a safe mill and system
dimensioning is facilitated for the client production
After Sales Service and individual solutions for the
modernization and retrofit of existing grinding
systems complete the product range.
on the other
with the air
is separated by a filter. The capacity for the 10 mill
sizes range from 100 up to 80,000 kg/h.
A promising new development is the "PM Direct Drive".
With this mill, access to the interior component parts
is greatly simplified, so facilitating a substantial
shortening of maintenance-induced shutdown times.
Classifier head and the upper mill housing can be automatically
opened by means of swiveling device. This
facilitates a speedy exchanging of milling rotors with a
diverse individual number of pendulums. With this new
concept the gearbox and clutch are no longer required
because the milling rotor is driven directly by a motor.
In January 2009 there were a total of 5 patent application
registrations made for this concept.
Cyclone Classifier Mark III
for Highest Requirements
Air classifiers are separating solid
materials according to their varying
sinkage speeds in the air flow.
Classifying technology is on the
advance, because the air separator
offers advantages with reference to
product fineness and solid material
Currently a classification of solid materials
with particle sizes of up to less than 5 μm is possible
at throughputs of up to 22,000 kg/h.
The newly patented cyclone classifier CSF Generation
III is usually operated as an inline-air separator downflow
the grinding system.
The milling and the first cut at the coarse end of the particle
size distribution takes place in the grinding equipment.
The cyclone classifier then takes over an effective
second cut in the fine grain sector. The high sharpness
of cut of the NEA design increased the product
yield by up to 30%. Alternatively with conventional
yields, a higher product quality can be achieved, which
means a lower fine dust proportion is realized.
The cyclone classifier is available in 25 diverse sizes.