High yield ladle bottoms

摘要

A refractory bottom lining for lining the bottom of a metallurgical vessel. The refractory bottom includes a stepped portion and an impact portion. The impact portion is formed of a first refractory material. The stepped portion is formed of a second refractory material and is disposed around the impact portion. The stepped portion includes an upper surface that has a plurality of discrete surface sections. The plurality of discrete surface sections includes an uppermost surface section, at least two intermediate surface sections and a lowermost surface section. Each surface section has a different elevation such that the uppermost surface section has a highest elevation and the lowermost surface section has a lowest elevation. The uppermost surface section, the at least two intermediate surface sections and the lowermost surface section define a continuously downward stepped path from the uppermost surface section to the lowermost surface section.

主权项

1. A refractory bottom lining for a metallurgical vessel, said metallurgical vessel having a bottom and a side wall, said bottom lining having:
a bottom surface that is dimensioned to overlay said bottom of said metallurgical vessel; an outer peripheral edge dimensioned to be spaced from said side wall of said metallurgical vessel; an impact portion formed of a first refractory material, said impact portion having an upper surface and an outer peripheral edge; a stepped portion formed of a second refractory material, said stepped portion disposed around said outer peripheral edge of said impact portion, said stepped portion having:
an upper surface comprising a plurality of discrete surface sections including an uppermost surface section, at least two intermediate surface sections and a lowermost surface section, said uppermost surface section, said at least two intermediate surface sections and said lowermost surface section disposed around a periphery of said impact portion such that said upper surface of said impact portion is spaced from said outer peripheral edge of said bottom lining,each surface section of said upper surface being disposed at a different elevation wherein said uppermost surface section has a highest elevation, said lowermost surface section has a lowest elevation, and said at least two intermediate surface sections each have an intermediate elevation that is different from each other and are disposed between said highest elevation and said lowest elevation, all of said discrete surface sections forming said upper surface of said stepped portion being arranged in elevation-descending order from said uppermost surface section to said lowermost surface section to define a continuously downward stepped path from said uppermost surface section to said lowermost surface section, wherein each successive surface section along said continuously downward stepped path is lower than a preceding surface section in said continuously downward stepped path; and an opening extending through said lowermost surface section of said stepped portion to allow a molten metal to drain from said metallurgical vessel.