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DEVELOPMENT OF A MONO-BLOCK TYPE MHP (MULTI-HOLE PLUG) WITH HIGH THERMAL SHOCK RESISTANCE

DEVELOPMENT OF A MONO-BLOCK TYPE MHP (MULTI-HOLE PLUG) WITH HIGH THERMAL SHOCK RESISTANCE

Autoria

SHIMADA, GAKU

SHIMADA, GAKU

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DOI

10.5151/2594-5327-40618

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Resumo

IN RECENT YEARS, ENVIRONMENTAL AND ECONOMIC DEMANDS FOR HIGHER EFFICIENCY IN STEELMAKING OPERATIONS HAVE BECOME DIVERSE. IN THIS REGARD, THE IMPORTANCE OF THE BOTTOM BLOWING SYSTEM IS GROWING AS A KEY TECHNOLOGY FOR COMBINED BLOWING (TOP AND BOTTOM BLOWING) CONVERTER FURNACE. VARIOUS TYPES OF INERT GAS BLOWING TUYERE, SUCH AS ARE APPLIED IN CONVERTER FURNACES. AMONG THESE INERT GAS BLOWING TUYERES, THE MHP WITH A BROAD RANGE OF GAS FLOW RATE IS THE MOST SUITABLE FOR SUCH DIVERSIFIED CONVERTER FURNACE OPERATION. MAGNESIA-CARBON (MGO-C) REFRACTORIES ARE USUALLY APPLIED FOR THE MHP. BECAUSE THE MHP IS USED UNDER OPERATIONAL CONDITIONS WHERE HIGH THERMAL SHOCK RESISTANCE IS REQUIRED A RELATIVELY HIGH BLENDING RATIO OF GRAPHITE. SINCE SUCH CONVENTIONAL PRODUCT DESIGN ADOPTED FOR MGO-C REFRACTORIES USED FOR THE MHP IS PARTLY INSUFFICIENT FOR THE OPERATIONAL CONDITIONS OF THE CONVERTER FURNACE IN A DIVERSIFIED STEELMAKING PROCESS, FURTHER IMPROVEMENT IN ITS THERMAL SHOCK RESISTANCE IS NECESSITATED. TO SOLVE, USED SPECIAL GRAPHITE A MONO-BLOCK TYPE MHP WITH HIGH THERMAL SHOCK RESISTANCE WAS DEVELOPED. A MONO-BLOCK TYPE MHP WITH BETTER THERMAL SHOCK RESISTANCE WAS USE IN AN ACTUAL FURNACE. THE PERFORMANCE WAS IMPROVED BY 40% COMPARED TO THE ORDINARY PRODUCT.

IN RECENT YEARS, ENVIRONMENTAL AND ECONOMIC DEMANDS FOR HIGHER EFFICIENCY IN STEELMAKING OPERATIONS HAVE BECOME DIVERSE. IN THIS REGARD, THE IMPORTANCE OF THE BOTTOM BLOWING SYSTEM IS GROWING AS A KEY TECHNOLOGY FOR COMBINED BLOWING (TOP AND BOTTOM BLOWING) CONVERTER FURNACE. VARIOUS TYPES OF INERT GAS BLOWING TUYERE, SUCH AS ARE APPLIED IN CONVERTER FURNACES. AMONG THESE INERT GAS BLOWING TUYERES, THE MHP WITH A BROAD RANGE OF GAS FLOW RATE IS THE MOST SUITABLE FOR SUCH DIVERSIFIED CONVERTER FURNACE OPERATION. MAGNESIA-CARBON (MGO-C) REFRACTORIES ARE USUALLY APPLIED FOR THE MHP. BECAUSE THE MHP IS USED UNDER OPERATIONAL CONDITIONS WHERE HIGH THERMAL SHOCK RESISTANCE IS REQUIRED A RELATIVELY HIGH BLENDING RATIO OF GRAPHITE. SINCE SUCH CONVENTIONAL PRODUCT DESIGN ADOPTED FOR MGO-C REFRACTORIES USED FOR THE MHP IS PARTLY INSUFFICIENT FOR THE OPERATIONAL CONDITIONS OF THE CONVERTER FURNACE IN A DIVERSIFIED STEELMAKING PROCESS, FURTHER IMPROVEMENT IN ITS THERMAL SHOCK RESISTANCE IS NECESSITATED. TO SOLVE, USED SPECIAL GRAPHITE A MONO-BLOCK TYPE MHP WITH HIGH THERMAL SHOCK RESISTANCE WAS DEVELOPED. A MONO-BLOCK TYPE MHP WITH BETTER THERMAL SHOCK RESISTANCE WAS USE IN AN ACTUAL FURNACE. THE PERFORMANCE WAS IMPROVED BY 40% COMPARED TO THE ORDINARY PRODUCT.

Palavras-chave

Refractory; Magnesia-carbon; graphite; thermal shock resistance

Refractory; Magnesia-carbon; graphite; thermal shock resistance.