Grinding and Classifying Systems 

NEA Classifiers for Fine and Superfine 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 grinding and subsequent separation by size, the so-called classification. Normally, classification takes place after grinding in a mill. Although classification can be integrated in the mill itself, the use of an external downstream air separator is common practice.

NEUMAN & ESSER has already developed and built air separators since 1931. Based on several decades of experience in classifier design, the latest, most efficient NEA classifier technology generation substantially moves the traditional benchmarks related to particle size, yield and energy efficiency. Unexpected advantages formerly impossible are generated for the customer, which are expressed in qualitatively higher value products, an increased quantity produced, and reduced costs.

NEA classifiers can classify solids not just by particle size and density, but can also be used to separate individual components from a mixture of substances. Based on different solid densities and particle sizes of the product components, the process can separate individual components out of a product mixture.