Raymond roller mills are available with grinding ring diameters ranging from 30 inches to 120 inches (760 to 3050 mm). These sizes are capable of producing a wide range of product fineness from a wide variety of material.
Most naturally occurring non-metallic minerals and many manufactured products contain a certain amount of free moisture. Raymond’s technique combines drying and pulverizing in the roller mill which may eliminate independent drying equipment thus reducing capital investment, processing time and handling. Heated air or hot waste gas is delivered to the mill return air housing and introduced through air ports to the grinding zone in the mill. The air turbulence and particle size produced during the grinding process are ideal for almost instantaneous evaporation of moisture. Feed moisture is normally limited to what can be reliably fed into the mill. Typical product moisture is 0.1 to 0.5% by weight.
Major factors affecting the capacity of a roller mill include desired fineness, grindability and initial moisture. The capacity of the mill decreases when product fineness increases. The harder a material is to grind, the lower the capacity of the mill. High initial moisture may also decrease mill capacity because of limitations on the drying capacity of the mill. The roller mill, when equipped with a variable speed mill drive, can be used in applications requiring adjustable capacity. This allows the user to match product rate with downstream process requirements, thereby reducing the operating and maintenance problems associated with frequent starts.
As a leading enterprise of mining machinery manufacturer of China， our company has strong technical force and powerful production capacity and can produce aggregate crushing, cement equipments, chute feeder, compound cone crusher, flotation machine, etc.
Raymond pulverizing and classification equipment has been setting the standards in size reduction since 1885, serving many types of mineral...