Repair mode for circumferential weld in ladle slag line part

Abstract

The invention relates to a repair mode for a circumferential weld in a ladle slag line part. The minimum residual thickness permitted by a circumferential weld is h, the residual thickness of a slag line brick on the upper part of the circumferential weld is greater than or equal to 150mm, and the thinnest part of the circumferential weld is opened and the thickness h1 is measured first; if h1 is greater than or equal to h, smearing repair is adopted; if h1 is smaller than h, repair is performed by adopting a mending method by replacing a damaged part; the mending method by replacing the damaged part comprises the following steps of: S1, removing the part of the circumferential weld, the thickness of which is smaller than h, along the circumferential weld, and in the removing process, setting a plurality of pivot points between upper available bricks and lower available bricks; S2, thoroughly cleaning and smoothly modifying the lower surfaces of the upper available bricks and the upper surfaces of the lower available bricks; S3, performing bricklaying by using repair bricks; S4, closing the circumferential weld; and S5, baking the repaired ladles according to a bake curve which is slightly modified for later use. According to the repair mode provided by the invention, the circumferential weld part is only removed and repaired, so that the integral structure of a ladle refractory material is retained to the maximum extent, and therefore, the consumption of the ladle refractory material of steel per ton is reduced, and the repair mode is energy-saving, low-carbon and environmental-friendly.

Description

Technical field [0001] The invention relates to a repairing technique for the inner lining of a steel metallurgical ladle, in particular to a repairing method for the ring seam at the slag line of the ladle. Background technique [0002] With the continuous improvement of people’s lives, the quality of traditional steel can no longer meet certain use performance. In order to obtain better varieties of steel, it is forced to change the ladle refining technology. Therefore, various out-of-furnace refining methods such as LF, RH, CAS, VOD, etc. Raw. At this stage, the main purpose is to improve the refining efficiency, to achieve optimized combination, complementary functions, and multiple refining methods are superimposed, so higher requirements are put forward for the life of the ladle working lining. At present, the slag line part of the ladle is mainly magnesia-carbon brick, and the wall part is mainly aluminum-magnesium-carbon brick. The problems that arise during the use proc...

AI Technical Summary

Problems solved by technology

However, the workload of re-laying is heavy and the operation is troublesome. Since the complete slag line bricks above the ring joint are also removed, the waste of slag line bricks is caused.

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