Conditions of use and construction process of refractory materials for steel ladles
author: Archie
2025-05-07
1、Steel ladle
Steel ladle is a major user of refractories. Steel ladle refractories are affected by the following destructive factors.
Steel ladle is a major user of refractories. Steel ladle refractories are affected by the following destructive factors.
(I) Conditions of use
(1) It is subjected to thermal and chemical action of steel and slag at a temperature of 1530~1700℃.
(2) When loaded as well as unloaded and emptied, the steel packages are heated and cooled sharply with a temperature difference of 800~1350℃.
(3) When loaded, it is subjected to the mechanical impact and abrasive action of the generally molten metal and slag stream.
(4) Hydrodynamic action of steel and slag.
Damage to the ladle lining is determined by the period of filling into the molten steel, the time and amount of molten steel entering the ladle, the slag composition and the thickness of the slag layer. Generally, the period of pouring steel into the steel in the bag to stay between 30~150min fluctuations, while the slag layer thickness reaches 300mm.
(1) It is subjected to thermal and chemical action of steel and slag at a temperature of 1530~1700℃.
(2) When loaded as well as unloaded and emptied, the steel packages are heated and cooled sharply with a temperature difference of 800~1350℃.
(3) When loaded, it is subjected to the mechanical impact and abrasive action of the generally molten metal and slag stream.
(4) Hydrodynamic action of steel and slag.
Damage to the ladle lining is determined by the period of filling into the molten steel, the time and amount of molten steel entering the ladle, the slag composition and the thickness of the slag layer. Generally, the period of pouring steel into the steel in the bag to stay between 30~150min fluctuations, while the slag layer thickness reaches 300mm.
(ii) Lining construction method and refractory materials
As in the case of ladle masonry with small pieces of products (ladle bricks), the entire ladle is cast with castable materials of various compositions. Ladle brick masonry implementation of spiral and stepped masonry (Figure 11-8). 300t ladle lower masonry thickness of 200mm, while the upper 90mm ❶. In the past, ladle bricks were usually built with clay bricks, and the life of the bricks depended mainly on the conditions of use. The unit consumption of ladle bricks is about 6kg/t for pouring flat and converter steel and about 11kg/t for electric furnace steel, indicating that the lining life is related to the type of steel being poured.
As in the case of ladle masonry with small pieces of products (ladle bricks), the entire ladle is cast with castable materials of various compositions. Ladle brick masonry implementation of spiral and stepped masonry (Figure 11-8). 300t ladle lower masonry thickness of 200mm, while the upper 90mm ❶. In the past, ladle bricks were usually built with clay bricks, and the life of the bricks depended mainly on the conditions of use. The unit consumption of ladle bricks is about 6kg/t for pouring flat and converter steel and about 11kg/t for electric furnace steel, indicating that the lining life is related to the type of steel being poured.
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