Furnace wall structure of molten metal container and furnace wall construction method of molten metal container

Abstract

This furnace wall structure of a molten metal container contains a heat insulation material which exhibits a thermal conductivity of 0.01 to 0.15 W / (m·K) in a temperature range of 25 to 300°C and which has a melting point of 1000 to 1400°C and a thickness of 2 to 10mm in a position in the longitudinal section view, said position being within a thicknesswise region of 0.75×T to 0.92×T (mm) from the inside surface of a magnesia / carbon refractory toward a steel shell. T is the thickness of the furnace wall exclusive of the steel shell.

Description

technical field

[0001] The invention relates to the furnace wall structure of molten metal containers (such as converters, molten iron tanks, steel liquid tanks, electric furnaces, etc.) and the furnace wall construction method of molten metal containers. Background technique

[0002] The converter, which is a vessel for molten metal, is used in a high-temperature environment because oxygen blowing is performed, and frequent repairs of refractory materials used in the furnace wall of the converter cannot be performed. Therefore, high durability (melting resistance, wear resistance, peeling resistance) is required for refractory materials, and its thickness is usually about 900 mm. As this refractory material, magnesia-carbon bricks (MgO—C bricks) are generally used. The magnesia-carbon brick has excellent refractoriness at high temperature because it contains magnesia, and at the same time maintains a certain thermal conductivity because it contains carbon, and has excellen...

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