Lining structure for molten-metal container

Abstract

A lining structure for a molten-metal container for containing a molten metal, wherein the lining structure is provided with: a steel shell constituting the outermost layer of the molten-metal container, the steel shell having a plurality of through-holes passing through an outer surface and an inner surface; a single-layer or double-layer permanent refractory layer provided on the inner side of the steel shell; a workpiece refractory layer provided on the inner side of the permanent refractory layer and at least partially composed of a castable refractory, the workpiece refractory layer forming an operation surface contacting the molten metal; and a plurality of layers of an insulating material that is a sheet-shaped polygonal member adjacently disposed with respect to the inner surface of the steel shell, the layers of the insulating material being installed between the steel shell and the permanent refractory layer or between two layers of the permanent refractory layer. A gap is formed between one of the insulating layers and at least one of the other insulating layers adjacently disposed with respect to the insulating layer, the gap being positioned on a through hole and having a thickness equal to or greater than the insulating material.

Description

technical field [0001] This invention relates to the construction of linings for molten metal vessels. Background technique [0002] The liner structure of the molten metal container (hereinafter, also simply referred to as "container") for storing molten metal such as molten iron and molten steel has a structure in which an iron sheet as the outermost layer supports a refractory material. [0003] As refractories used in molten metal vessels, there are shaped refractories and unshaped refractories. In particular, monolithic refractory materials are also called castables, and are widely used as refractory materials constituting the refractory material layer of workpieces that come into contact with molten metal because of their ease of installation. [0004] Unshaped refractories are generally formed by adding water to a mixture of powder and granules of high melting point substances such as aluminum to make it flow into the container and become a lining shape. [0005] Ho...

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Problems solved by technology

[0013] Therefore, regardless of whether moisture remains inside the monolithic refractory, it is mistakenly assumed that the pre-drying is completed, and the molten metal is put into the container, which may cause burst damage to the monolithic refractory.

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