Title

WEAR MECHANISMS IN DIFFERENT ZONES OF LD- CONVERTERS

WEAR MECHANISMS IN DIFFERENT ZONES OF LD- CONVERTERS

Authorship

Jansen, Helge; Dörr, Joachim

Jansen, Helge

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Dörr, Joachim

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DOI

10.5151/2594-5300-17643

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Abstract

Different wear zones in BOF refractory linings are presented and discussed. Whe- reas chemical wear in terms of corrosion and oxidation is the main wear mechanism in the tapping- and slag-zone, a combination of chemical and thermomechanical wear can be attributed to the lower cone and bottom. In the trunnion and barrel the MgO-C bricks are affected by oxidation, in the upper cone additionally by abrasion. Heavy mechanical shocks act on the scrap impact pad. The wear can be balanced by the use of MgO-C bricks based on various MgO grades (96, 97, 98 % MgO, Fused Magnesia, Dead Burnt Magnesia), stainless steel-fibres and Ceramically Bonded MgO-C Bricks. Cardboards allow destruction-free expansion of the bricks and minimization of thermomechanical wear.

Different wear zones in BOF refractory linings are presented and discussed. Whe- reas chemical wear in terms of corrosion and oxidation is the main wear mechanism in the tapping- and slag-zone, a combination of chemical and thermomechanical wear can be attributed to the lower cone and bottom. In the trunnion and barrel the MgO-C bricks are affected by oxidation, in the upper cone additionally by abrasion. Heavy mechanical shocks act on the scrap impact pad. The wear can be balanced by the use of MgO-C bricks based on various MgO grades (96, 97, 98 % MgO, Fused Magnesia, Dead Burnt Magnesia), stainless steel-fibres and Ceramically Bonded MgO-C Bricks. Cardboards allow destruction-free expansion of the bricks and minimization of thermomechanical wear.

Keywords

BOF; Refractories, Fused magnesia; Dead burnt magnesia.

BOF; Refractories, Fused magnesia; Dead burnt magnesia.