Calciner reverse feed discharge spiral
AssigneeGTE Products Corporation
InventorJames N. Christini
Life of this patent
Estimating the term…
Abstract
A calciner has a rotatable indirectly-heated cylindrical retort with a material receiving end and a material discharge end and a reverse pitch spiral is affixed internal of the cylindrical retort at the material discharge end.
Claims11
A reverse 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 for effecting rotation of said rotatable retort in a given direction to provide material flow in a given direction, said reverse feed spiral characterized by the improvement wherein a spiral having a reverse pitch with respect to said given direction of rotation and of material flow within said rotatable retort is positionally located within said material-discharging end of said rotatable retort whereby the direction of material flow within said material-discharge end of said rotatable retort is reversed by said reverse feed spiral and retention time of said material within said rotatable retort is increased.
In a refractory metal reclaiming calciner having a cylindrical rotatable retort with a given inner diameter, a material-receiving end, a material discharging end and a hot zone between said material receiving and discharging ends with said rotatable retort coupled to a motor drive effecting rotation thereof and material flow therein in a given direction, a reverse feed spiral positionally located within said material discharging end of said rotatable retort and characterized by the improvement wherein said feed spiral has a reverse pitch with respect to said given direction of material flow whereby the direction of material flow within said material-discharging end is reversed with respect to said material flow in said retort by said reverse feed spiral to effect increased retention time of said material within said rotatable retort.
Dependencies are inferred from the claim text.