Modelling of a Two-Stage Air Classifier

Other conference contribution, 2013

A two-stage air classifier has been modelled using experimental data from a crushing plant in Sweden. The air classifier is used to produce aggregates for the concrete industry, and the feed is a VSI-crushed 0-2 mm fraction. The first stage is a gravitational inertial air classifier, and the second is a centrifugal air classifier. The experimental data for the model were obtained using design of experiment (DoE). Three different variables that influence the cut size and particle size distribution were investigated and incorporated into the model. The model of the air classifier was created using the efficiency curve approach. The model was validated by a simulation of the production and then compared with the measured data. It is concluded that the model can be used to predict the air classification performance.