Título

RAPID AND DURABLE REPAIRS OF BLAST FURNACES SHAFTS WITH JETCASTING®: ASSESSMENT AND INDUSTRIAL UTILIZATION

RAPID AND DURABLE REPAIRS OF BLAST FURNACES SHAFTS WITH JETCASTING®: ASSESSMENT AND INDUSTRIAL UTILIZATION

Autoria

Dyck, Tobias; Feliciano, Cristobal; Struzik, Mike F.; Dörr, Joachim; Kesselheim, Bertram

DOI

10.5151/2594-357X-00016

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Resumo

There exist diverse methods of repairing the shaft of a blast furnace, they all present advantages and limitations. For instance, bricks lining can be a durable solution but requires long downtime periods, which limits its economical attractiveness. Traditional dry-gunning has been used to reduce downtime, but attainable physical properties and performances are comparably low. In this sense, the Jetcasting technology has been developed to provide iron makers with a refractory material durable and rapid to install. The present works start with a review of the principal wearing mechanisms in blast furnaces and available methods for shaft repairs. Later a presentation of the fundaments and equipment for Jetcasting is presented to continue with a laboratory assessment of the chemical and mechanical properties. The laboratory analyses are complement with a study of the campaigns of 21 blast furnaces around the world that demonstrate the superior resistance of Jetcasting material and its feasibility to minimize downtime and guaranty economical effectiveness of blast furnaces repairs.

 

There exist diverse methods of repairing the shaft of a blast furnace, they all present advantages and limitations. For instance, bricks lining can be a durable solution but requires long downtime periods, which limits its economical attractiveness. Traditional dry-gunning has been used to reduce downtime, but attainable physical properties and performances are comparably low. In this sense, the Jetcasting technology has been developed to provide iron makers with a refractory material durable and rapid to install. The present works start with a review of the principal wearing mechanisms in blast furnaces and available methods for shaft repairs. Later a presentation of the fundaments and equipment for Jetcasting is presented to continue with a laboratory assessment of the chemical and mechanical properties. The laboratory analyses are complement with a study of the campaigns of 21 blast furnaces around the world that demonstrate the superior resistance of Jetcasting material and its feasibility to minimize downtime and guaranty economical effectiveness of blast furnaces repairs.

Palavras-chave

Blast furnaces; Jet casting, Refractory material; Nanobond.

Blast furnaces; Jet casting, Refractory material; Nanobond.