Agitator for mechanical agitation desulfurization

Abstract

The invention discloses a stirrer for realizing desulfurization by using mechanical stirring. The stirrer comprises a stirring shaft and a connecting flange, wherein the connecting flange is arranged at the upper portion of the stirring shaft; stirring blades and a stabilizer are sequentially arranged at the lower end of the stirring shaft; each of the stirring shaft, the stirring blades and the inner layer of the stabilizer is a hollow metal pipe core; the top of each hollow metal pipe core is connected with the connecting flange; a metal blocking head is arranged on the inner wall of the lower end of the hollow metal pipe core; an air cooling pipe is inserted into each hollow metal pipe core; the top end of each air cooling pipe is connected with the connecting flange; the pipe orifice at the lower end of each air cooling pipe forms an air outlet with the corresponding metal blocking head. The stirrer disclosed by the invention has the advantages of reducing the intensity of rotating vortex of liquid iron below the bottom center of the stirrer, delaying the damage progress of the stirrer, improving the comprehensive application performances of the stirrer, effectively relieving the shortcoming of short long service life of a large stirrer and realizing the comprehensive aims of prolonging the service life of the stirrer, reducing the consumption of the stirrer, improving the economical efficiency and the direct-selling property of a large liquid iron KR stirring desulfurization technology and the like.

Description

technical field [0001] The invention relates to a stirrer, in particular to a stirrer used for mechanical stirring desulfurization outside a molten iron furnace before steelmaking in a converter. Background technique [0002] The KR (Kambara Reactor) stirring desulfurization method is a desulfurization technology outside the molten iron furnace that Nippon Steel began to study in 1963 and was applied to industrial production in 1965. This desulfurization method is based on a cross-shaped leaf structure lined with refractory materials The agitator is immersed in 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, and mixed and reacted with the high-temperature molten iron to achieve the purpose of desulfurization . The desulfurization method has the characteristics of high desulfurization effi...

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Problems solved by technology

[0004] The object of the present invention is to provide a stirrer for mechanical stirring and desulfurization outside the molten iron furnace before steelmaking of converter with simple structure, convenient manufacture, strong resistance to damage at the bottom of the stirrer, and long service life. The problem that the service life of the agitator drops sharply after being enlarged

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