Study of dust production mechanisms during the rotary dumping of powdered materials in hemi-enclosed space

摘要

This paper presents the airflow distribution and the dust production mechanisms due to the rotary dumping of powered materials in a hemi-closure space using theoretical method and numerical simulations, as well as the measured results. The materials make parabolic movements and cause the splash of the dust by impacting with the static dust and walls of the storage. The dust volume relates to the height difference of the materials dumping and horizontal velocity of the dust. The further diffusion of dust is affected by several kinds of airflow with fan airflow which is the main factor. The calculative formula for the airflow volume is given, which can also be used in the similar ventilation and dust removal system directly.