The SD combines ultra-sharp cuts with low energy consumption and low abrasion in a compact, simply operated unit.
This new concept of separation provides a narrower particle size distribution of the product with less ultra fine particles and less residues. For cement applications this will result in higher compression strengths obtained at lower specific surface areas (cm/g Blaine).
A lower specific energy consumption of the whole closed circuit grinding installation is realised by increased fines recovery compared to conventional air separators. Depending upon the fineness of the feed to the Classifier and the product fineness, the "bypass" of unclassified particles to the tailings is maintained under 10 %. As a result of this, increases of production of 20 % to 30 % over the conventional separators have been proven in the field and with lower circulating loads.
How it works:
In this new Side Draft Classifier, air flows horizontally through the curtain of particles descending from the top distributor plate. In the process, particles are just laterally displaced as they are acted upon by gravity, drag force of air and centrifugal force. Finally, collision forces are involved if a particle is able to reach the rejector and is too large to pass through.
The rejector is equipped with a variable speed motor and drive (frequency inverter as standard) which allows the operator to simply "dial-in" fineness changes from the central control room The separation air, laden with the fine product, is discharged through one, two or multiple air outlets to the outside of the separator while the coarse product falls to the lower part of the classifier and is discharged. Although wear is very limited in this new type of separator, all parts submitted to abrasion are lined, as standard, with abrasion resistant materials as Ni-hard, Basalt and A-R steel.
As air displaces particles horizontally rather than lifting them, less energy is required than for other classifiers.
Side Draft High Efficiency Classifier
Side Draft (SD)High Efficiency Classifier
The SD combines ultra-sharp cuts with low energy consumption and low abrasion in a compact, simply operated unit.
This new concept of separation provides a narrower particle size distribution of the product with less ultra fine particles and less residues. For cement applications this will result in higher compression strengths obtained at lower specific surface areas (cm/g Blaine).
A lower specific energy consumption of the whole closed circuit grinding installation is realised by increased fines recovery compared to conventional air separators. Depending upon the fineness of the feed to the Classifier and the product fineness, the "bypass" of unclassified particles to the tailings is maintained under 10 %. As a result of this, increases of production of 20 % to 30 % over the conventional separators have been proven in the field and with lower circulating loads.
How it works:
In this new Side Draft Classifier, air flows horizontally through the curtain of particles descending from the top distributor plate. In the process, particles are just laterally displaced as they are acted upon by gravity, drag force of air and centrifugal force. Finally, collision forces are involved if a particle is able to reach the rejector and is too large to pass through.
The rejector is equipped with a variable speed motor and drive (frequency inverter as standard) which allows the operator to simply "dial-in" fineness changes from the central control room The separation air, laden with the fine product, is discharged through one, two or multiple air outlets to the outside of the separator while the coarse product falls to the lower part of the classifier and is discharged. Although wear is very limited in this new type of separator, all parts submitted to abrasion are lined, as standard, with abrasion resistant materials as Ni-hard, Basalt and A-R steel.
As air displaces particles horizontally rather than lifting them, less energy is required than for other classifiers.
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