Ladle for the preparation of metal provided with a refractory bottom lining and method for producing said refractory bottom lining
AssigneesSollac, LaFarge Refractaires Monolithiques
InventorsMichel Beurotte, Pierre de Lafarge
Life of this patent
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Abstract
The invention provides a ladle for the preparation of metal comprising a metal case (1) provided, on its inner surface, with a refractory wall lining (3) and a refractory bottom lining (4) with a taphole (5), characterized in that the surface of the refractory bottom lining (4) in contact with the metal in preparation is a concave surface having at every point a slope in the direction toward the taphole (5). The invention also provides a method for producing such a refractory bottom lining.
Claims9
A ladle for the preparation of metal and adapted to be turned over, comprising:
- an open-top metal case having a generally cylindrical side wall and a generally flat circular bottom,
- a refractory side wall lining and a refractory bottom lining having a tap hole disposed on an inner surface of said case,
- wherein a surface of said bottom lining for contacting the metal in preparation is concavely curved and having at every point a slope in a direction toward said tap hole,
- wherein said tap hole is eccentrically located with respect to the center of said bottom,
- wherein said refractory bottom lining is formed by at least an assembly of independent elements with joints therebetween, and
- wherein said assembly of the independent elements forms a mosaic having joints, some of said joints being arcuate and concentric with the tap hole and remaining joints radiating relative to the arcuate joints, the radiating joints being offset from one concentric joint to another concentric joint.
A method for producing a refractory bottom lining for a ladle for the preparation of metal and adapted to be turned over, the ladle having an open top metal case to be lined that has a generally cylindrical side wall and a generally flat bottom, the bottom lining having a tap hole therein, eccentrically located with respect to the center of the lining and the bottom lining comprising an assembly of independent elements separated by joints and the surface of the refractory bottom lining being in contact with the metal in preparation and being concavely curved and having at every point a slope in a direction toward the tap hole, the method comprising the steps of:
- producing a mold having a bottom that is convexly curved corresponding to the concave curvature of the surface of the bottom lining and having vertical partitioning walls defining compartments corresponding to the geometry of the elements of the refractory bottom lining, the walls having a section corresponding to the section of the joints;
- pouring into each of the compartments a selected refractory concrete and allowing it to set to form the elements;
- and
- stripping the elements from the mold and providing each with a reference.
Dependencies are inferred from the claim text.