Extraction of natural raw materials - Import export

The SMA is a mechanical airclassifier, autonomous equipment designed to separate a material of intermediate fineness (0 to 5 mm for instance) or a ground product (0 to 1 mm or less) into two fractions of different finenesses one fine fraction (particles from 0 to 40 microns up to 500 microns); one coarse fraction (from 40 microns to 5 mm for instance). This air classifier can be used either as a classifier operating in an open circuit (for extraction of natural raw material like sand for instance) or in a closed milling circuit, to control the fineness of ground product or to "preclassify" when the classifier is placed after the air separator and grinding oversize only.