Material is ground by introducing compressed gas, accelerated to sonic velocity through a series of nozzles. An integral rotary classifier wheel controls the particle size leaving the system.

This single unit is capable of milling materials up to a hardness of 10 Mohs and enables accurate and highly controllable particle sizes to be achieved, typically with narrow size distribution. A range of mill sizes is available for throughputs ranging typically from 0.5kg to 2 tonne per hour with average particle sizes as low as 1 to 2 microns.

This feature provides improved grinding efficiency, whilst the integrated classifier simultaneously provides more control over the particle size distribution than is the case with a regular/standard impact mill. Available in a range of sizes, the mill is designed for throughputs typically between 1kg and 6 tonnes per hour and is capable of reducing particle size to below 10 microns.

Slow rotational speeds combined with simple and robust construction make them ideal for grinding hard and abrasive materials as well as lower hardness materials at high throughput, where continuity of service, low maintenance and minimum downtime are a necessity.

Ball mills can be designed to operate continuously (fed at one end of the system and discharged at the other), or on a batch basis for smaller, or intermittent volumes. They can also be operated either on a stand-alone basis (‘open-circuit grinding’) or in conjunction with a classifier which returns oversize product to the mill for further grinding (‘closed-circuit grinding’).

Our range includes screen discharge and grate discharge designs.

This energy efficient mill can be equipped with a variety of internal stator and rotor configurations, enabling the unit to meet a wide range of applications, including pre-grinding, medium-fine grinding and de-agglomeration, suitable for milling finished product of 500 microns and below, with 10 tonnes per hour.

Material is fed into a high-speed vortex within the shallow grinding chamber which is created by introducing compressed gas through a series of specialist nozzles. Material is then ground within the vortex and is drawn through the central fixed classifier once particles are at the desired size.

Interchangeable internal parts ensure the desired output specification is achieved. The principal applications for this mill type, which has no moving internal parts, lie in the field of pharmaceuticals and allied products, as well as speciality chemicals where sterile and contamination-free operation is essential.