Refractory component for lining a metallurgical vessel
AssigneeNorth American Refractories Co.
InventorRonald L. Barrett
Life of this patent
Estimating the term…
Abstract
In a steel ladle used for handling molten steel, a precast ladle barrel ring forms part of a refractory structure that covers the bottom wall and side wall of the steel ladle. The precast ladle barrel ring is comprised of a monolithic annular ring formed of a high-temperature, cast refractory. The annular ring further includes means for positioning the precast ladle barrel ring in a steel ladle.
Claims8
A lifting device for lifting and positioning a precast ladle barrel ring into a steel ladle, said ring defining a generally cylindrical central cavity and having spaced-apart openings formed in an inner surface thereof communicating with said central cavity, said lifting device comprised of:
- a rigid central frame having connection means connectable to a device capable of lifting and moving said frame;
- a plurality of leg portions extending outwardly from said frame, said leg portions disposed on said frame to be in registry with said openings in said inner surface of said ring when said lifting device is disposed in said central cavity;
- a movable lifter bar associated with each of said leg portions, each lifter bar being movable relative to an associated leg portion between a retracted position and an extended position wherein said lifter bar extends outward from said associated leg portion;
- wherein said lifting device is positionable within said central cavity of said precast barrel ring when said lifter bars are in said retracted position;
- and
- wherein said lifting bars extend into said openings in said ring when said lifting bars are in said extended position.
Dependencies are inferred from the claim text.