Micron-Powder Pulverizer, Kryptron Series

Production of micron-order powders takes sophisticated, high-precision engineering, but the application of these powders has been widening in recent years, encompassing such industries as cosmetics, pharmaceuticals, battery materials, silicon metal, electronics parts, and chemical products. The toner of a laser printer, for example, requires powder the size of only 6µm.

EarthTechnica entered the powder and particle material manufacturing equipment sector in 1985, with the launch of the Kryptron. The Kryptron was able to pulverize materials down to just a few µm from the outset, but each time it was upgraded, it made innovative technological advancements, such as higher-speed pulverizing rotors, extension of the mill chamber, and improved pulverizing groove shape.

These enhancements were reflective of the needs of the times. In the case of printer toner, powder and particles were expected to demonstrate higher performance: size and shape had to be uniform so that they adhered to papers at lower temperatures, and the use of heat-vulnerable materials had to be allowed. Other sectors also began to pose similar requirements, and to meet these fast-changing needs, the company made notable technological innovations, which resulted in energy-saving equipment and high-performance materials.

The original model of this high-efficiency mechanical pulverizer incorporates the principles of jet mills. It is capable of pulverizing materials which previously could be processed only by jet mills, and also achieves an extremely sharp particle size distribution because of its lower generation of unwanted fine powder, compared to jet mills.

Developed incorporating all the advantages of the original model while achieving improved pulverizing performance. This model is capable of pulverizing heat-vulnerable materials into powders with average particle sizes of 5µm* or less, which only jet mills had previously been able to do. With improved pulverizing performace, Kryptron Eddy achieves new levels of powder spheroidization.

*1 micrometer equals 1/1000 mm

The Prime model achieves an even higher speed than older models, resulting in reduction of final particle size by more than 1µm, thanks to an improved pulverizing groove shape. Throughput also increases by 150 to 200 percent, relative to previous models. The stator can be opened more widely than on all previous models, which achieves significantly easier cleaning of the inside of the mill chamber.

Achieving the highest pulverizing performance in the Kryptron Series, with this model, a coolant is injected into the high-speed rotor, remarkably improving the system’s cooling capability. Compared to previous models, it requires 20% less power to pulverize, and even if a larger capacity motor is used, the exhaust temperature is kept to a minimum. Even using heat-vulnerable materials, throughput is 150 to 200 percent higher, relative to previous models.