Title

REDUCING CO2 EMISSIONS WITH A ZERO-DRYING CASTABLE FOR BLAST-FURNACE TROUGH AND RUNNERS

REDUCING CO2 EMISSIONS WITH A ZERO-DRYING CASTABLE FOR BLAST-FURNACE TROUGH AND RUNNERS

Authorship

Orsolini, Heloisa Daltoso; Sako, Eric Yoshimitsu; Galesi, Douglas Fernando; Silva, Bianca Maria Gomes da; Alves, Wiliam; Junuário, Nilton Fernando

Orsolini, Heloisa Daltoso

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Sako, Eric Yoshimitsu

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Galesi, Douglas Fernando

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Silva, Bianca Maria Gomes da

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Alves, Wiliam

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Junuário, Nilton Fernando

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DOI

10.5151/5463-5463-35049

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Abstract

As the steel industry is a major global emitter of greenhouse gases, projects that aim to reduce or eliminate CO2 emissions within the steelmaking process are urgently needed. In this work, an entirely novel binder system for monolithic refractories, named Fasftrax®, is proposed with the goal of reducing and potentially eliminating the drying step during through and runners repairs. For this purpose, this binder system was studied in an Al2O3-SiC-C castable and compared with the two most commonly used commercial binders: calcium aluminate cement (CAC) and colloidal silica (CS). The results showed that the Fastfrax® system successfully produced a 3D gel-like microstructure without the presence of crystalline hydrates. As a consequence, an excellent drying behavior was achieved, even in the most aggressive heating conditions, both in lab and industrial scales, and with no side effects on the high temperature properties. Such positive results highlight that the use of such exclusive binder could lead to the avoidance of up to 500 tons of CO2 emitted into the atmosphere annually per blast furnace.

As the steel industry is a major global emitter of greenhouse gases, projects that aim to reduce or eliminate CO2 emissions within the steelmaking process are urgently needed. In this work, an entirely novel binder system for monolithic refractories, named Fasftrax®, is proposed with the goal of reducing and potentially eliminating the drying step during through and runners repairs. For this purpose, this binder system was studied in an Al2O3-SiC-C castable and compared with the two most commonly used commercial binders: calcium aluminate cement (CAC) and colloidal silica (CS). The results showed that the Fastfrax® system successfully produced a 3D gel-like microstructure without the presence of crystalline hydrates. As a consequence, an excellent drying behavior was achieved, even in the most aggressive heating conditions, both in lab and industrial scales, and with no side effects on the high temperature properties. Such positive results highlight that the use of such exclusive binder could lead to the avoidance of up to 500 tons of CO2 emitted into the atmosphere annually per blast furnace.

Keywords

CO2 Emission Avoidance; Fastfrax®; Refractories; Drying

CO2 Emission Avoidance; Fastfrax®; Refractories; Drying