The RJM-G fluidized-bed jet mill series covers models RJM100–RJM1250 with gas consumption of 50–11200 kg/h, gas pressure of 5–10 bar and a fineness D50 of 0.5–150 μm. High-velocity gas jets fluidize the material so that particles crush one another, giving contamination-free grinding and a narrow particle-size distribution for chemicals, minerals, metallurgy, ceramics, refractories, pharmaceuticals, food and new materials.