Jet mills, air classifying impact mills and pin mills are used in various degrees of impact and agitation to grind
and classify minerals. 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.

According to size or density, minerals can also be air classified. 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.

Aggregates, crushed stones, hydrates lime, pigments, sodium bicarbonate, titanium dioxide, clay, diatomaceous earth, gypsum, limestone, silica sand, talc, coal, phosphate ore, sodium bicarbonate, trona, salt, perlite ore and gem stones are great examples of types of minerals that often need to be size reduced or air separated.

These products air classify and size reduce minerals: