Dry aggregate materials are air classified according to size or density. Air classification provides the most
effective means for separating a product from a feed stream, for dedusting, or when used in conjunction with grinding equipment for increasing productivity.

Dry aggregate materials can be reduced in particle size with Sturtevant’s crushers. The crushers are best-suited
for controlling the reduction of friable materials to granules where fines are undesirable. Crushers also reduce particle size for fine grinding to coarse crushing capabilities.

Limestone, granite, trap rock, sandstone, basalt, diabase rock, gabbro, sand and gravel are a few examples of types of aggregates that often need to be size reduced or air separated.

These products air classify and size reduce aggregate materials: