Construction method of ladle lining

Abstract

The invention relates to a construction method of a ladle lining. The method comprises the following steps: (1) a ladle wall is cleaned; (2) fire clay is coated on the ladle wall and heat preservation plates, the heat preservation plates are sticked from seams of the bottom of the ladle and the ladle wall and along the ladle wall from bottom to top, gaps between the plates are filled with the fire clay, and the constructed heights of the heat reservation plates are equal to the height of a steel water liquid level; (3) holes are arranged between gap lines between an upper row of heat reservation plates and a lower row of heat dissipation plates and around the ladle wall every 1000-1200 millimeters at intervals, and two neighboring rows of holes are arranged in a mutually staggered mode; (4) after the heat preservation plates are constructed, fetal membranes are installed to tie permanent layer castable; and (5) after the permanent layer is tied and naturally dried, a working layer is constructed and is used in an online-mode after being baked. The method can effectively reduce heat loss of the ladling lining, improve temperature-controlling ability in the steel-making process, and ensure stable processes of production, and can also prolong service life of ladle shells, the ladle lining permanent layer and the working layer, and reduce production cost.

Description

technical field [0001] The invention relates to the field of iron and steel metallurgical refractory materials, in particular, the invention relates to a method for building a steel ladle inner lining. Background technique [0002] For the steelmaking process, temperature is life. Temperature is not only the basis of the steelmaking process, but also the basis for obtaining good billet quality. The level of temperature control in the steelmaking system is related to the quality of multiple indicators such as steel material consumption, alloy material consumption, and refractory material consumption, and directly determines the level of steelmaking costs. Balanced and effective system temperature control is of great significance to ensure smooth production, improve product quality and reduce production costs. [0003] With the development of modern steelmaking technology, the ladle is no longer a simple liquid metal transportation container. Due to the emergence of out-of-f...

AI Technical Summary

Problems solved by technology

Due to the emergence of out-of-furnace refining and continuous casting technology, the time for ladles to carry molten steel is longer and the capacity of ladles continues to expand, which brings about two problems: first, the heat loss of molten steel is further aggravated, and the temperature drop of molten steel is further accelerated , prone to low-temperature steel, in order to ensure the smooth progress of continuous casting production, it is generally used to increase the tapping temperature of the converter or to compensate by refining the temperature, which will inevitably result in prolonged smelting time and a large consumption of energy and raw materials; the second is the high heat of the ladle lining system Flux, resulting in excessive ladle shell temperature, reduced cladding strength and creep resistance

[0004] At present, the ladle lining built by the existing masonry method cannot reduce the heat loss of the ladle very well. Therefore, it is necessary to develop a new masonry method for the ladle lining