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Torpedo ladle refractories

Shift from chamotte bricks to Al2O3-SiC-C bricks

Torpedo ladles, as the containers transferring molten iron tapped from blast furnaces up to steel-making plants, have been conventionally lined with chamotte bricks.
Since the 1980s, molten iron preliminary processing has become popular to remove impurities from the metal by means of dephospholization, desulfurization, or desiliconization. However, under such conditions, the conventional chamotte brick linings, having shown severe deterioration in their life span, were replaced with Al2O3-SiC-C bricks, which are far superior in terms of corrosion resistance and thermal spalling resistance.

Proposing optimal lining design in line with operating conditions

Krosaki Harima Corporation selects and proposes the optimal materials and lining designs for each respective portion of the torpedo ladle with the goal of ensuring entirely well-balanced wear.

Requirements

Common :Spalling resistance
Each portion  
For the slag line :Corrosion resistance
For the metal impact zone :Abrasion resistance
For the ceiling :Oxidation resistance

Bricks provided with an oxidation-resistant coat

Recently, materials which show substantially lower thermal conductivity have been developed and applied to the torpedo ladles to effectively protect the steel shell from deformation. Furthermore, the bricks provided with a coat of excellent oxidation resistance have also been developed to control oxidation of the brick surface when the torpedo ladle is dried. Both products are obtaining favorable comments from many clients.

Midterm repair contributes to the optimization of repair cycle

Additionally, Krosaki Harima Corporation has developed gunning materials for midterm repair, which is effectively applied to adjust the rotation and schedule of torpedo ladle repair in integrated iron and steel plants.


Torpedo ladle

Torpedo ladle

Image of refractories inside torpedo ladle

Image of refractories inside torpedo ladle

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