Rotary calciner feed spiral
AssigneeGTE Products Corporation
InventorsJames N. Christini, Tai K. Kim, Robert P. McClintic
Life of this patent
Estimating the term…
Abstract
In a calciner having a rotatable cylindrical retort, an improved material feed spiral has a final turn and a 3/4 turn ending immediately adjacent the retort and a next to final turn connected to the final turn and extending outwardly therefrom away from the cylindrical retort. The final turn and 3/4 turn are of a height substantially equal to a given percentage of the inner diameter of the retort and the next to final turn tapers from a height substantially equal to the given height of the final turn to a height less than the given height.
Claims12
A material feed spiral for a refractory metal reclaiming calciner having a cylindrical rotatable retort of a given inner diameter with a material receiving end and a material discharging end separated by a hot zone and coupled to a motor drive source, said material feed spiral characterized by the improvement comprising a spiral having a final turn and a 3/4-turn rotated 180.degree. therefrom and ending adjacent said material-receiving end of said rotatable retort and a next to final turn connected to and extending outwardly from said final turn and away from said material-receiving end of said rotatable retort, said final turn and said 3/4-turn having a height substantially equal to a given percentage of the inner diameter of said cylindrical retort and said next to final turn tapering from said height of a given percentage of said inner diameter of said cylindrical retort to a height less than said given percentage of said inner diameter of said cylindrical retort whereby undesired "feedback" into the material feed spiral is inhibited.
A material feed spiral for a cylindrical rotatable retort having of a given inner diameter having a material-receiving end and a material-discharging end separated by a hot zone and coupled to a drive motor, said material feed spiral characterized by the improvement comprising a feed spiral having first and second connected turns and a 3/4-turn rotated 180.degree. from said second turn, said first turn tapering from a height less than a given percentage to a height of a given percentage of said inner diameter of said cylindrical retort and connected to said second turn and said second turn and said 3/4-turn ending immediately adjacent said material-receiving end of said cylindrical retort and having a height substantially equal to said given percentage of said inner diameter of said cylindrical retort.
Dependencies are inferred from the claim text.