Title

FROM WASTE TO RESOURCE: RECYCLING SPENT REFRACTORIES IN HIGH-PERFORMANCE MAGNESIA-CHROMITE BRICKS

FROM WASTE TO RESOURCE: RECYCLING SPENT REFRACTORIES IN HIGH-PERFORMANCE MAGNESIA-CHROMITE BRICKS*

Authorship

SARDELLI, JOSE ALVARO PREVIATO; SOARES, SERGIO EUSTAQUIO; MENDONÇA, GUSTAVO OLIVEIRA; PEREIRA, SERGIO CRISTIANO; LOYOLA, LARISSA RIOS; SILVEIRA, FERNANDA TEIXEIRA DA; AGUIAR, WEVERSON CARDOSO DE

SARDELLI, JOSE ALVARO PREVIATO

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SOARES, SERGIO EUSTAQUIO

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MENDONÇA, GUSTAVO OLIVEIRA

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PEREIRA, SERGIO CRISTIANO

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LOYOLA, LARISSA RIOS

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SILVEIRA, FERNANDA TEIXEIRA DA

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AGUIAR, WEVERSON CARDOSO DE

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DOI

10.5151/2594-5327-41468

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Abstract

IN 2020, THE STEEL INDUSTRY EMITTED AN AVERAGE OF 1.89 TONS OF CO₂ PER TON OF STEEL PRODUCED, TOTALING APPROXIMATELY 2.6 BILLION TONS OF CO₂. ANNUALLY, UP TO 28 MILLION TONS OF SPENT REFRACTORIES ARE GENERATED. THE STEELMAKING INDUSTRY, A PRIMARY CONSUMER OF REFRACTORIES, DEMANDS INNOVATIONS AND LOW CO₂ EMISSION PRODUCTS FROM SUPPLIERS. THE RH DEGASSER, CRUCIAL FOR PRODUCING HIGH-QUALITY ULTRA-LOW CARBON (ULC) STEEL, TYPICALLY USES MAGNESIA-CHROMITE REFRACTORY BRICKS. THIS STUDY EVALUATES THE IMPACT OF THREE DIFFERENT ADDITIONS OF SECONDARY RAW MATERIALS TO A STANDARD DIRECT-BONDED COMPOSITION. THE CHEMICAL, PHYSICAL, AND THERMOMECHANICAL PROPERTIES OF THESE SRM-CONTAINING BRICKS WERE COMPARED TO STANDARD ONE. A NOVEL TECHNOLOGY WAS DEVELOPED TO UTILIZE MGCR SRM IN DIRECT-BONDED BRICKS FOR INDUSTRIAL APPLICATIONS. THE EVALUATED PROPERTIES OF ALL PROPOSED COMPOSITIONS SHOWED HIGH VALUES COMPARED TO THE STANDARD COMPOSITION, EXCEPT FOR EQUIVALENT THERMAL SHOCK RESISTANCE. THESE RESULTS DEMONSTRATE THAT WITH EFFECTIVE RECYCLING AND INNOVATIVE PROCESSING, SRM CAN ENHANCE STANDARD COMPOSITIONS.

IN 2020, THE STEEL INDUSTRY EMITTED AN AVERAGE OF 1.89 TONS OF CO₂ PER TON OF STEEL PRODUCED, TOTALING APPROXIMATELY 2.6 BILLION TONS OF CO₂. ANNUALLY, UP TO 28 MILLION TONS OF SPENT REFRACTORIES ARE GENERATED. THE STEELMAKING INDUSTRY, A PRIMARY CONSUMER OF REFRACTORIES, DEMANDS INNOVATIONS AND LOW CO₂ EMISSION PRODUCTS FROM SUPPLIERS. THE RH DEGASSER, CRUCIAL FOR PRODUCING HIGH-QUALITY ULTRA-LOW CARBON (ULC) STEEL, TYPICALLY USES MAGNESIA-CHROMITE REFRACTORY BRICKS. THIS STUDY EVALUATES THE IMPACT OF THREE DIFFERENT ADDITIONS OF SECONDARY RAW MATERIALS TO A STANDARD DIRECT-BONDED COMPOSITION. THE CHEMICAL, PHYSICAL, AND THERMOMECHANICAL PROPERTIES OF THESE SRM-CONTAINING BRICKS WERE COMPARED TO STANDARD ONE. A NOVEL TECHNOLOGY WAS DEVELOPED TO UTILIZE MGCR SRM IN DIRECT-BONDED BRICKS FOR INDUSTRIAL APPLICATIONS. THE EVALUATED PROPERTIES OF ALL PROPOSED COMPOSITIONS SHOWED HIGH VALUES COMPARED TO THE STANDARD COMPOSITION, EXCEPT FOR EQUIVALENT THERMAL SHOCK RESISTANCE. THESE RESULTS DEMONSTRATE THAT WITH EFFECTIVE RECYCLING AND INNOVATIVE PROCESSING, SRM CAN ENHANCE STANDARD COMPOSITIONS.

Keywords

CO2 Emissions; Magnesia-chromite refractories; Steel industry; Recycling

CO2 Emissions; Magnesia-chromite refractories; Steel industry; Recycling.