Abstract
Cold model experiments are performed to understand the spout eye area in a cylindrical vessel during the bottom gas injection. Low-density particles are used for the model of molten slag and the density of the particles on the spout eye area is investigated. The spout eye area is compared with that of a mercury-silicon oil system. The spout eye area decreases with the density when the thickness of the slag layer is greater than a certain critical value, while remains constant when the thickness is smaller than that critical value.
