Ladle repair process of castable steel ladle bottom

Abstract

The invention relates to a ladle repair process of a castable steel ladle bottom, referred as a 'semidry' ladle repair process, and belongs to the technical field of metallurgical steel ladle repair. The invention adopts the technical scheme that the process comprises the following steps of: mixing castable by adding water till the castable has no natural flowability but can be stacked; arrangingmaterials at the ladle bottom; and ramming the ladle bottom materials layer by layer, stamping the ladle bottom materials by using a quick vibration rammer, wherein the final volume density of the castable can reach over 3.2g / cm<3> and the repair of the ladle bottom is finished by adopting a stamping mode of multilayer ramming. The process has the advantages that: the castable is semidry, and thequick vibration rammer is used for ramming, so the erosion resistance of the steel ladle bottom is remarkably enhanced, and the service life of the steel ladle is prolonged; because the castable has low moisture adding amount and has no natural flowability, the thickness of the castable at different parts of the ladle bottom can be controlled, the thickening treatment of the easily eroded part ofthe ladle bottom is realized, and the ladle bottom is eroded synchronously with other parts; and the process is suitable for repair of all castable ladle bottoms such as tundish, iron ladles and the like.

Description

technical field [0001] The invention relates to a repairing process for the bottom of a castable ladle, referred to as a "semi-dry" repairing process for short, and belongs to the technical field of metallurgical ladle repairing. Background technique [0002] An important process in the steelmaking process is to transfer high-temperature molten steel from the converter to the continuous casting machine. The process equipment that undertakes this important transfer task is the ladle. After the ladle wall is repaired, the next process is to repair the ladle bottom. When the bottom of the ladle is made of unshaped refractory material, it is generally formed by casting (such as figure 1 , figure 2 ), the background technology mostly adopts the "wet method" process, and the castable is mixed with a certain proportion of water (about 8%) and poured evenly, so the castable has a certain natural fluidity, and is formed by vibrating with a vibrating rod; there are problems in the ...

AI Technical Summary

Problems solved by technology

When the bottom of the ladle is made of unshaped refractory material, it is generally formed by casting (such as figure 1 , figure 2 ), the background technology mostly adopts the "wet method" process, and the castable is mixed with a certain proportion of water (about 8%) and poured evenly. Yes: When the vibrating rod vibrates, it is easy to cause the "screening" phenomenon of different particle sizes of the castable, which affects the performance of the castable. The volume density of the castable is less than 2.9g / cm 3 , high porosity, poor resistance to molten steel corrosion and scouring

At the same time, a large amount of water is added when pouring the bottom of the ladle. During the baking process, due to poor drainage at the bottom of the ladle, it is easy to cause material collapse at the bottom of the ladle.

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