Impregnated fired refractory shape and method of producing same

Abstract

Abstract A HIGH-FIRED BASIC REFRACTORY SHAPE HAVING AN APPARENT POROSITY OF ABOUT 10% TO ABOUT 20%, THE OPEN PORES OF WHICH CONTAIN A SKELETAL-LIKE STRUCTURE OF A MATERIAL COMPATIBLE WITH THE HOSE MATERIAL OF THE SHAPE. FINE-GRAIN CARBON IS UNIFORMLY DISTRIBUTED ON THE SKELETAL-LIKE STRUCTURE, THE WALLS OF THE PORES AND UNIFORMLY THROUGHOUT THE SHAPE. A MAJOR PORTION OF THE OPEN PORES HAVE AN EFFECTIVE PORE DIAMETER OF ABOUT 7 MICRONS TO ABOUT 0.5 MICRON. THE SHAPE HAS INCREASED RESISTANCE TO PENETRATION AND EROSION BY SLAGS PRESENT IN STEELMAKING FURNACES AND HAS HOT CRUSHING STRENGTH EQUIVALENT TO OR BETTER THAN PREPARED CONVENTIONAL SHAPES. A CONVENTIONAL HIGH-FIRED BASIC REFRACTORY SHAPE IS IMPREGNATED WITH A SOLUTION OF A SUBSTANCE CAPABLE OF BEING TREATED TO FORM A MATERIAL COMPATIBLE WITH THE HOSE MATERIAL OF THE SHAPE. THE IMPREGNATED AND TREATED MATERIAL FORMS A SKELETAL-LIKE STRUCTURE IN THE OPEN PORES OF THE SHAPE. THE SHAPE IS IMPREGNATED A SECOND TIME WITH A CARBONACEOUS MATERIAL WHICH UPON PYROLYSIS YIELDS A FINEGRAINED CARBON WHICH IS UNIFORMLY DISTRIBUTED THROUGHOUT THE SHAPE AND UPON THE SKELETAL-LIKE FORMATION AND THE WALLS OF THE OPEN PORES IN THE SHAPE.

Inventors

• 👤 Regis J Leonard
• 👤 Gene C Ulmer

Bibliographic Details