Large steel ladle and manufacturing method for same

Abstract

The invention discloses a large steel ladle, which comprises a ladle body with a top opening. An air brick and a tapping nozzle are arranged at the bottom of the ladle body, the ladle body sequentially comprises a steel shell, a permanent layer and a lining layer from outside to inside, the permanent layer is cast with aluminum-magnesium casting materials, the lower half portions of the bottom surface and the lateral surface of the lining layer are cast with corundum spinel casting materials, the upper half portion of the lateral surface of the lining layer is built with magnesia carbon bricks or built with mixed magnesia carbon bricks and carbon-free precast blocks, and a seal is arranged at the top of the lining layer. The manufacturing method for the large steel ladle includes the steps: 1 casting the permanent layer; 2 manufacturing the lining layer; 3 baking; and 4 mounting the air brick and arranging the tapping nozzle at the bottom of the ladle body. The large steel ladle has the advantages that (1) the lining layer is high in strength and resistant to corrosion of molten steel, so that the service cycle of the lining layer is longer than original service cycle and frequent repair for the lining layer is omitted, and (2) when the lining layer is repaired, material consumption is low, construction efficiency is high, labor intensity is low, and manpower and material resources are saved.

Description

technical field [0001] The invention relates to a ladle, in particular to a large ladle and a manufacturing method thereof. Background technique [0002] At present, the existing large ladle of more than 120 tons, such as figure 1 As shown, the package body usually consists of an external permanent layer and an inner lining layer. The inner lining layer is built with magnesia-carbon bricks or a combination of carbon-free prefabricated blocks and magnesia-carbon bricks, which needs to be repaired and replaced frequently. The inner lining is time-consuming and labor-intensive. At the same time, the consumption of refractory materials such as magnesia-carbon bricks and carbon-free prefabricated blocks is large, and the maintenance cost is high. In addition, due to the long repair or replacement time, it will also affect the operation cycle of the ladle. SUMMARY OF THE INVENTION [0003] The problem to be solved by the present invention is to provide a large ladle with simple...

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Problems solved by technology

[0002] At present, the existing large ladles of more than 120 tons, such as figure 1 As shown, the bag body usually consists of an external permanent layer and an inner lining layer. The inner lining layer is built with magnesia-carbon bricks or a mixture of carbon-free prefabricated blocks and magnesia-carbon bricks, and the bag body needs to be repaired and replaced frequently. Lining is time-consuming and labor-intensive. At the same time, the consumption of refractory materials such as magnesia-carbon bricks and carbon-free prefabricated blocks is large, and the maintenance cost is high. In addition, due to the long repair or replacement time, it will also affect the operation cycle of the ladle

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