Rod mill's Advantages as Aggregate Crusher

Other grinding mills have limited application to the production of aggregate from typically strong, abrasive rocks. Finely sized aggregate and dust are generated unavoidably by all forms of comminution device and can be recovered or separated from coarser aggregates by specialized screens, classifiers or cyclones and fabric filters included in dust collection systems. Pulverizers of the edge-runner mill type are extensively employed to produce powders from soft minerals for major end-uses such as agricultural limestone and dolomite, chemicals, fillers for rubber, plastics, paper and paint, fire retardant in coal mines, pulverized coal and raw meal feed to cement kilns. Although none of these uses can be categorized as aggregates, the equipment will be included within the processing plant and similar mineral powders may be incorporated in masonry cements and asphalt. The edge-runner mill comprises alloy steel-tyred rollers bearing upon a rotating horizontal table or fixed cylindrical anvil. The load upon the rollers is created either by the mass of the rollers or springs or centrifugal force. The mill operates dry utilizing air, often preheated to dry moist rock, to transport the ground product to the air classification circuit. Finely ground rock is recovered by cyclones and bag filters whilst oversize particles are recirculated to the mill for further reduction.