Abstract: A refractory ring structure for forming a section of an inner wall or liner of a metallurgical vessel is provided. The refractory ring structure comprises a continuous top surface; a continuous bottom surface; a continuous arcuate inner surface extending from the top surface to the bottom surface and defining a cavity; a continuous arcuate outer surface opposite the inner surface and extending between the top surface and the bottom surface; and a continuous protrusion or a plurality of protrusions extending from the inner surface for lifting the ring structure. The refractory ring structure comprises a heat resistant, refractory material suitable for use in the inner wall of a metallurgical vessel. Also provided herein are a metallurgical vessel comprising a refractory ring structure as disclosed herein, and a method for providing or replacing all or a section of a refractory inner wall or liner of a metallurgical vessel.

Abstract: A refractory ring structure for forming a section of an inner wall or liner of a metallurgical vessel is provided. The refractory ring structure comprises a continuous top surface; a continuous bottom surface; a continuous arcuate inner surface extending from the top surface to the bottom surface and defining a cavity; a continuous arcuate outer surface opposite the inner surface and extending between the top surface and the bottom surface; and a continuous protrusion or a plurality of protrusions extending from the inner surface for lifting the ring structure. The refractory ring structure comprises a heat resistant, refractory material suitable for use in the inner wall of a metallurgical vessel. Also provided herein are a metallurgical vessel comprising a refractory ring structure as disclosed herein, and a method for providing or replacing all or a section of a refractory inner wall or liner of a metallurgical vessel.

Abstract: A refractory ring structure for forming a section of an inner wall or liner of a metallurgical vessel is provided. The refractory ring structure comprises a continuous top surface; a continuous bottom surface; a continuous arcuate inner surface extending from the top surface to the bottom surface and defining a cavity; a continuous arcuate outer surface opposite the inner surface and extending between the top surface and the bottom surface; and a continuous protrusion or a plurality of protrusions extending from the inner surface for lifting the ring structure. The refractory ring structure comprises a heat resistant, refractory material suitable for use in the inner wall of a metallurgical vessel. Also provided herein are a metallurgical vessel comprising a refractory ring structure as disclosed herein, and a method for providing or replacing all or a section of a refractory inner wall or liner of a metallurgical vessel.

Abstract: Referring to the figures, a landing jack lift 100 is shown having an upright lever portion 105 which is pivotally connected to a base plate 130. Base plate 130 allows landing jack lift 100 to be used in soft soil conditions and provides a stable support in use. A lifting arm 120 is pivotally connected to upright lever portion 105 using a pivot 150. Pivot 150 is a bolt, but other pivoting means may be used such as pins, rivets, etc. as is known in the art. A lifting plate 125 is provided to fit under a landing jack 165 attached to a trailer 160 to allow a user to move landing jack 165 without having to bend over or lie on the ground. Lifting plate 125 is pivotally mounted so the as the angle changes with respect to lifting arm 120, lifting plate 125 maintains level contact with landing jack 165. Additionally, lifting plate 125 telescopically fits within lifting arm 120 in order to allow a user to adjust the length.

Abstract: A landing jack lift has an upright lever portion which is pivotally attached to a base plate. A lifting arm is pivotally connected to the upright along the lower portion of the upright lever. A lifting plate is pivotally disposed on an end of the lifting arm and removably fits under a landing jack foot while in use. A pin pulling arm is pivotally disposed above the lifting arm on the upright lever portion and selectively retains the locking pin on the landing jack to allow the landing jack to move. The lifting arm is constrained to not pivot past around 90 degrees from the upright lever. In use the user is not required to bend over while raising and lowering the landing jack. A handle is provided on the upper portion of the upright lever to aid the user.