Title

POST MORTEM STUDY OF THE HEARTH CARBON 1 REFRACTORIES OF TERNIUM BLAST FURNACE #

POST MORTEM STUDY OF THE HEARTH CARBON 1 REFRACTORIES OF TERNIUM BLAST FURNACE #

Authorship

Rimoldi, Maria José; camelli, Silvia; Vázquez, Adrián; Marinelli, Pablo; Doro, Enrique; Mirabelli, Juan J.

Rimoldi, Maria José

I am this author

camelli, Silvia

I am this author

Vázquez, Adrián

I am this author

Marinelli, Pablo

I am this author

Doro, Enrique

I am this author

Mirabelli, Juan J.

I am this author

DOI

10.5151/2594-357x-0111

Downloads

Abstract

After the blow-down of the Blast Furnace #2 of Termium Planta General Savio, there were taken 24 cores from different locations of the hearth in order to obtain samples from the different layers that formed the hearth’s design. The scope of this work was to determine the wear profile of the hearth after eleven years of campaign and to identify the main wear mechanism of the refractory lining. The post mortem study included physical and mechanical properties determination, chemical composition analysis as well as crystalline phase identification by DRX and determination of the thermal conductivity at 400oC. It was possible to determine the location of a brittle zone with presence of cracks, high apparent porosity and low mechanical strength. Among the wear mechanism, it was identified penetration of hot metal and alkalis, and the presence of circumferential and longitudinal cracks, responsible of the variation in the physical and mechanical properties of the carbon materials.

After the blow-down of the Blast Furnace #2 of Termium Planta General Savio, there were taken 24 cores from different locations of the hearth in order to obtain samples from the different layers that formed the hearth’s design. The scope of this work was to determine the wear profile of the hearth after eleven years of campaign and to identify the main wear mechanism of the refractory lining. The post mortem study included physical and mechanical properties determination, chemical composition analysis as well as crystalline phase identification by DRX and determination of the thermal conductivity at 400oC. It was possible to determine the location of a brittle zone with presence of cracks, high apparent porosity and low mechanical strength. Among the wear mechanism, it was identified penetration of hot metal and alkalis, and the presence of circumferential and longitudinal cracks, responsible of the variation in the physical and mechanical properties of the carbon materials.

Keywords

Blast furnace; Hearth; Refractory wear; Carbon

Blast furnace; Hearth; Refractory wear; Carbon