Using different sprayer (mechanical), the material to be dried in a spray form, form discrete particles have a larger surface area (10-200um), the occurrence of intense heat exchange with the hot air, quickly ruled out the water itself, in a few within seconds when seconds to get dry, such as contact with the hot air temperature 400-500 ℃ need within 0.01-0.04 seconds to complete drying, hot air in contact with the 100-150 ℃ need 1-3 seconds to complete drying. The bottom of the finished product in a powder state in a desiccator sedimentation discharge.