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because in spraying suspensions or solutions the minimum droplet size is limited by customary spraying systems. This problem might be avoided by pulse drying. A pulsing combustion of natural gas generates pressure pulses, reaching the drying chamber where the suspension is atomised. The pressure gradients of the pulses create strong stress to the droplets which results in a further atomisation. Due to this improved atomisation very fine powders are generated. The particle size distribution of the powders is close to the size distribution of the particles dispersed in the suspension. A further step for grinding can be omitted.

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