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Grinding and Classifying Systems 

NEA Classifiers for Fine and Finest Products


The particle size distribution of pulverized materials is a decisive factor for the properties. When manufacturing these materials, a precisely defined particle size is achieved by crushing and subsequent separation by size, the so-called classification. Normally, classification takes place after crushing in a mill. Although classification can by all means be integrated in the mill itself, the use of an external downstream air separator is common practice.

NEUMAN & ESSER has already developed and constructed air separators since 1931. Based on several decades’ experience in classifier construction, the latest, most efficient NEA classifier technology generation considerably shifts the traditional benchmarks related to selectivity, yield and energy efficiency. Therefore, unexpected advantages not deemed possible are generated at the customer’s, which are expressed in qualitatively higher value products, an increased quantity produced, and reduced costs.

NEA classifiers serve to classify solids by particle size and density but can also be used to separate individual components from a mixture of substances. Here, the process uses the speeds of differently sized and weighted solid particles in an air flow and divides the feed material into fine material on one side and coarse material on the other side.

Highly Efficient Classification, Flexible Use

The latest generation NEA classifiers excel with maximum pre-dispersion and harmonized flow conditions over the entire classifying zone. As a result, customers realize extremely high fine material yields with minimum pressure loss and energy requirements.

NEA classifiers can both be used in independent classifying systems and combined with the mist diverse grinding systems. It goes without saying that they can be combined with all NEA mills, but also with ball mills and further mill types. The combination of your mill with NEA classifiers significantly increases the yield and achieves considerably more precise separating cuts.

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