Sealing structure for preventing air leakage of tuyere sleeve joint surface and tuyere sleeve structure

Abstract

The invention relates to a sealing structure for preventing air leakage of a tuyere sleeve joint surface and a tuyere sleeve structure. The sealing structure comprises an inner conical surface arranged on the inner wall of the small-diameter end of a tuyere large sleeve and an outer conical surface arranged on the outer wall of the large-diameter end of a tuyere middle sleeve, the outer conical surface can abut against the inner conical surface in a sealed mode, and a sealing ring is arranged between the outer conical surface and the inner conical surface; the sealing structure for preventingair leakage of the tuyere sleeve joint surface further comprises a sealing ring plate capable of absorbing deformation of the tuyere middle sleeve, the radial inner side of the sealing ring plate canbe fixedly connected with the end face of the large-diameter end of the tuyere middle sleeve in a sealed mode, and the radial outer side of the sealing ring plate can be connected with the inner sideface of the tuyere large sleeve in a sealed abutting mode. According to the sealing structure for preventing air leakage of the tuyere sleeve joint surface, the sealing structure can play a triple sealing role, can effectively solve the problem of gas leakage caused by a gap generated between the joint surfaces of the tuyere middle sleeve and the tuyere large sleeve after the tuyere middle sleeveis upwarped and deformed, effectively improves the working environment of a tuyere area, and is an effective measure for realizing the safety production of a blast furnace.

Description

technical field [0001] The invention relates to the technical field of iron and steel metallurgy, in particular to a sealing structure and a tuyere cover structure for preventing air leakage from a joint surface of a tuyere cover. Background technique [0002] During the blast furnace smelting process, complex physical and chemical reactions will take place in the furnace, and some harmful elements such as alkali metals and zinc will be brought into the furnace charge. Circular enrichment, especially in the tuyere area, a large amount of alkali metal and zinc will be found when the tuyere is replaced. In addition, alkali metal and zinc will penetrate into the refractory material, causing abnormal expansion of the refractory material. The corrosion mechanism is as follows: Alkali metals (K, Na) are easy to form low melting point substances in the blast furnace, and chemically react with the refractory material, causing the strength of the refractory material to decrease and a...

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Problems solved by technology

[0005] The object of the present invention is to provide a sealing structure and a tuyere cover structure that prevents air leakage from the joint surface of the tuyere cover, and overcomes the problems in the prior art that the cover in the tuyere is easily deformed to cause leakage and difficult maintenance and replacement. The triple sealing function can effectively solve the problem of gas leakage caused by the gap between the joint surface of the tuyere middle sleeve and the tuyere large sleeve after the tuyere middle sleeve is upturned and deformed, and can effectively improve the working environment in the tuyere area. effective measures

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