Peter T. Sutor - Pittsburgh PA Edward L. Erny - Bethel Park PA
Assignee:
Dresser Industries, Inc. - Dallas TX
International Classification:
C21C 544
US Classification:
266 44
Abstract:
An improved ladle especially adapted for holding molten metals such as steel, the ladle having an interior brick lining a major part thereof which consists essentially of a composition of from about 70 to 95 weight percent of an aluminous material having a minimum alumina content of about 60 weight percent and the balance refractory clay; and for each 100 parts by weight of said composition, from about 5 to 20 weight percent of fine silicon carbide.
Peter T. Sutor - Pittsburgh PA Leigh F. Brooks - Clairton PA
Assignee:
Dresser Industries, Inc. - Dallas TX
International Classification:
C21C 544
US Classification:
266280
Abstract:
A heat-insulating board comprising a molded refractory material having substantially uniformly distributed therethrough flexible thermoset polymer fibers resistant to decomposition at a temperature up to about 400. degree. F. in an amount sufficient to increase the fracture energy of said board, and compositions for making such board.
Harbison-Walker Refractories Company - Pittsburgh PA
International Classification:
C04B 3503
US Classification:
501 951
Abstract:
A pulverulent fiber-reinforced spray mix is disclosed in which about 0. 02 to 0. 3 wt. % of flexible, thermoset polymer fibers resistant to decomposition at a temperature up to about 400. degree. F. are added for each 100 wt. % of other solids in the mix to form a mix which both avoids formation of mat-like structures in the dry hopper of refractory spray apparatus and provides a sprayed lining that is resistant to cracking and peeling during dry-out and preheat. The invention also comprises sprayable compositions formed by admixing water with the mix.
A mix and a high alumina refractory shape with high resistance to aluminum penetration comprising aluminum oxide and at least about 1% by weight of boron phosphate.