Multifunctional circular seam type gas supply element for steel melting

Abstract

A steel-making multifunctional circular seam type air supply unit belongs to the steel-making technique field, and comprises a gas ejector pipe, a mounting flange, an air separation chamber and an air inlet chamber, wherein, the gas ejector pipe consists of 2 to 5 layers of pipes which are sheathed concentrically; the pipe in the innermost layer is called a central pipe; the seam width among circular seams among all the layers of the pipes is 0.2 to 3.0mm. A spot or a rib resurface-welded by stainless steel is used for ensuring the precise location of seam width and for preventing molten steel from moistening the interior wall of steel pipes, thus not easy to be jammed by pouring in. The gas ejector pipe is connected with the mounting flange which is connected with the air separation chamber used for distributing the air coming from the air inlet chamber to enter each circular seam of the gas ejector pipes to be sprayed out; and the air separation chamber is connected with the air inlet chamber. The steel-making multifunctional circular seam type air supply unit has the advantages of raising the furnace campaign to over 10000 with maximum over 30000 from 2000; and the complex blowing rate is 100 percent. The bottom blowing air supply unit is not replaced in the whole furnace campaign period, thus solving the problem of short working life of the combined blown converter, which is also a worldwide problem in metallurgy.

Description

technical field [0001] The invention belongs to the technical field of steelmaking, and in particular provides a steelmaking multifunctional annular seam type air supply element for use in various steelmaking process technical equipment. Background technique [0002] Various gases (nitrogen, argon, air, etc.). In various metallurgical container equipment such as converters, electric furnaces, and ladles, after various gases are blown through the gas supply element, the molten steel will be violently stirred due to the kinetic energy of the blown bubbles and the rising effect of high temperature expansion. This stirring action of molten iron and molten steel will promote the metallurgical reaction between molten iron, molten steel and slag, making it closer to equilibrium. After adopting the gas stirring process, the combined blowing converter will reduce splashing, increase the residual manganese at the end point, and smelt a wider range of steel types. The electric furna...

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Problems solved by technology

[0015] The object of the present invention is to provide a steelmaking multi-functional annular seam type air supply element, which overcomes the problems of easy melting, easy blockage, Various defects such as small gas flow adjustment range and large resistance; the furnace life of the reblowing converter has increased from more than 2,000 furnaces to more than 10,000 furnaces, the highest has exceeded 30,000 furnaces, the reblowing ratio is 100%, and the bottom has not been replaced during the entire furnace service period Blowing gas supply components to solve the worldwide metallurgical problem of low life of re-blowing converters

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