Title

Hearth Wearing in Siderar Blast Furnace N°2

Hearth Wearing in Siderar Blast Furnace N°2

Authorship

LINGIARDI, OSCAR; ZUBIMENDI, JOSE; AMETRANO, RAUL; GIANDOMENICO, FERNANDO; GONZALEZ, NORBERTO

LINGIARDI, OSCAR

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ZUBIMENDI, JOSE

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AMETRANO, RAUL

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GIANDOMENICO, FERNANDO

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GONZALEZ, NORBERTO

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DOI

10.5151/2594-357x-34Red-213-226

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Abstract

The start up of Siderar Blast Furnace N°2 took place in September 1995 and, after an 8-year running, the furnace has a 16,5 Mt cumulated production, with an average productivity of 2.31 t/dm3 IV (2.62 t/dm3 WV). It has been noted that, differently from the majority of blast furnaces, the hearth bottom has suffered remarkable wear, and not the typical wear known as elephant foot. The wear and the temperature variations in the tap holes areas has been controlled implementing modifications in the operating practice and improving the quality of the tap hole mix. The stack, bosh and hearth walls are in good conditions. To control hearth bottom temperatures, actions have been carried out aimed at: Limiting the blast furnace productivity according to the hearth bottom temperature Increasing the external cooling capacity by means of improvements in the plenum chamber. Creating a protective skull for the remaining refractory by using ilmenite in the burden, and modifying the operating practices in the processes and in the cast house area.

The start up of Siderar Blast Furnace N°2 took place in September 1995 and, after an 8-year running, the furnace has a 16,5 Mt cumulated production, with an average productivity of 2.31 t/dm3 IV (2.62 t/dm3 WV). It has been noted that, differently from the majority of blast furnaces, the hearth bottom has suffered remarkable wear, and not the typical wear known as elephant foot. The wear and the temperature variations in the tap holes areas has been controlled implementing modifications in the operating practice and improving the quality of the tap hole mix. The stack, bosh and hearth walls are in good conditions. To control hearth bottom temperatures, actions have been carried out aimed at: Limiting the blast furnace productivity according to the hearth bottom temperature Increasing the external cooling capacity by means of improvements in the plenum chamber. Creating a protective skull for the remaining refractory by using ilmenite in the burden, and modifying the operating practices in the processes and in the cast house area.

Keywords

blast furnace, hearth wear, refractory, cooling system, productivity

blast furnace, hearth wear, refractory, cooling system, productivity