Stirring paddle for desulfuration

Abstract

The invention relates to the field of molten iron desulfuration, in particular to a stirring paddle for desulfuration. The stirring paddle for desulfuration comprises a metal framework and a castablelayer. A plurality of anchoring parts are arranged on the surface of the metal framework at intervals, an inorganic nonmetal heat isolation fiber layer is further arranged between the metal frameworkand the castable layer, and the thickness of fiber felt ranges from 5 mm to 15 mm. The inorganic nonmetal heat isolation fiber layer can be firmly bonded to the surface of a steel structure through water glass, the inorganic nonmetal heat isolation fiber layer cannot be washed away when castable enters a die to be poured, and the fiber-like irregular surface of the inorganic nonmetal heat isolation fiber layer can be utilized for being well combined with the castable. After forming, expansion of the formed metal framework in the stirring paddle is greatly reduced due to the heat isolation function of the inorganic nonmetal heat isolation fiber layer. The inorganic nonmetal heat isolation fiber layer is heated and shrunk and can absorb a part of metal framework expansion value, accordingly,the castable cracking possibility is reduced, and the service life of the stirring paddle is prolonged.

Description

technical field [0001] The invention relates to the field of molten iron desulfurization, in particular to a stirring paddle for desulfurization. Background technique [0002] The KR stirring desulfurization method is a desulfurization technology outside the molten iron furnace that Japan's Nippon Steel Hirohata Iron Works began to study in 1963 and was applied to industrial production in 1965. This desulfurization method is to dip a refractory-lined stirring paddle into the molten iron tank to rotate and stir the molten iron, so that the molten iron generates a vortex, and the weighed desulfurizer is added to the surface of the molten iron by the feeder, and is drawn into the molten iron by the vortex. , Mix and react with high-temperature molten iron to achieve the purpose of desulfurization. The KR desulfurization method has the characteristics of high desulfurization efficiency, less desulfurization agent consumption, short operation time, low metal consumption and low ...

AI Technical Summary

Problems solved by technology

Due to the erosion and erosion of high-temperature molten iron, the thickness of the castable has become thinner, and the temperature of the external molten iron is easily transferred to the internal steel structure, resulting in a higher temperature and larger expansion of the steel structure.

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