A masonry structure that can increase the service life of the bottom of the ladle

Abstract

The invention provides a steel ladle bottom structure capable of increasing the service cycle of the steel ladle. The steel ladle bottom structure is composed of an impact region, a transition region, a non-impact region, and a water outlet of the non-impact region, wherein the various regions of the bottom are constructed by use of magnesia-carbon bricks; the magnesia-carbon bricks different in thickness specification are applied to the impact region, the transition region and the non-impact region, in other words, the impact region is constructed with the thickness of not less than 280mm are applied to the impact region, while the non-impact region is constructed with the thickness of not less than 150mm, and the transition region is constructed with the thickness between the thickness of the impact region and that of the non-impact region; a castable protective layer is poured on the steel ladle bottom formed by use of the magnesia-carbon bricks different in thickness specification and a smooth slope is formed with the water outlet as the lowest point. According to the steel ladle bottom structure capable of increasing the service cycle of the steel ladle, the magnesia-carbon bricks different in thickness are laid in different regions of the steel ladle bottom and the castable protective layer is added so that the steel ladle bottom can be enabled to serve as long as a wrapping wall; the magnesia-carbon bricks are securely connected with the castable protective layer so that the safety of the steel ladle in operation can be improved; besides, liquid steel can be completely poured out and then the protective material is poured, and consequently, the safety accident of steel leakage due to serious erosion of the bottom bricks is eliminated.

Description

technical field [0001] The invention relates to a steelmaking equipment, in particular to a ladle for steelmaking, in particular to a masonry structure at the bottom of the ladle that can increase the service life of the ladle. Background technique [0002] The bottom and wall of the carbon steel ladle are made of magnesia carbon bricks. Due to factors such as the strong erosion of the bottom bricks by molten steel during tapping, the use environment is worse than that of the wall bricks, often resulting in severe erosion of the bottom bricks, so that the ladle is forced to be removed in advance under normal conditions of the wall bricks. At present, the magnesia-carbon bricks used at the bottom of the ladle are all brick-shaped with a thickness specification of 300mm, and the bottom surface is straight. In actual use, that is, when the steel is tapped, the steel flow and steel slag will directly impact the fixed area at the bottom of the ladle, that is, the impact area. I...

AI Technical Summary

Problems solved by technology

When the magnesia-carbon bricks in the impact area are severely corroded, if it is not found in time, it will cause a serious accident of steel leakage at the bottom of the ladle, which will seriously affect production and damage the equipment; The bottom brick cannot meet the requirement of life synchronization with the wall brick, that is, the service life of the bottom of the ladle is scrapped after an average of about 60 times, while the service life of the wall of the ladle is stipulated at 110 times, so once the bottom of the ladle is seriously corroded, the whole ladle must be scrapped Replacement will lead to an increase in the cost of refractory materials for the ladle; in addition, since the magnesia-carbon bricks used on the bottom of the ladle are bricks of the same thickness and size, the bricks in the non-impact area are used in a better environment. The consumption of refractory materials in the ladle can be appropriately reduced through technical improvement; at the same time, since the bottom of the ladle is straight, there will always be residual molten steel at the bottom of the ladle at the end of each casting, resulting in waste and affecting the consumption of steel materials indicators, increasing the cost per ton of steel

[0003] After searching, the Chinese patent publication number is CN201702360U, which discloses "a steel ladle with a slope-shaped bottom", which mainly describes that the bottom of the ladle is formed with a slope, which is convenient for pouring out the molten steel when casting steel, but there are bricks at the bottom of the ladle. The problem of delamination and loose bonding with castables, castables are easy to peel off when casting steel, and cannot solve the problem of synchronizing the service life of the bricks at the bottom of the ladle and the bricks on the walls; the Chinese patent application number is the document CN200710052576, which discloses "A A Ladle Bottom Masonry Method, which mainly describes the use of piling bricks and castables in the impact area of ​​the ladle bottom, and at the same time invented the installation method of the ventilating bricks, but the piling bricks only exist in a local area, and there are layers of bricks and castables at the bottom of the ladle , The problem of not being tightly combined, the castable is easy to peel off when casting steel, which cannot solve the problem of synchronizing the service life of the brick at the bottom of the ladle and the brick at the wall

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