Converter sliding tapping hole with argon blowing function and whole-process tapping slag stopping method

Abstract

The invention relates to a converter sliding tapping hole with an argon blowing function and a whole-process tapping slag stopping method. According to the converter sliding tapping hole, the center line of the cross section of a dispersion type ventilation ring is arranged between the center line of the cross section of a tapping hole brick body and the outer ring of the cross section of the tapping hole brick body; the distance between the outer ring of the cross section of the dispersive ventilation ring and the outer ring of the cross section of the tapping hole brick body is limited to be 20-25mm, and after argon is blown in, argon bubbles form an annular air curtain barrier right in front of the periphery of the tapping hole, so that not only is steel slag which is about to enter the tapping hole along with steel flow blocked, but also the height of a vortex sucked by the steel flow above the tapping hole is effectively reduced, and the service life of the steel flow is prolonged. The key technical problem that steel slag is mixed in steel flow flowing out of the tapping hole is solved, slag control tapping in the whole converter tapping process is achieved through blowing slag stopping and sliding plate slag stopping, the converter slag discharging amount is further reduced, erosion and scouring of the steel slag to the inner walls of steel flowing channels of the tapping hole, the inner water gap and the outer water gap are relieved, and the service life of the converter is prolonged. And the service life of the tapping hole is prolonged.

Description

technical field [0001] The invention relates to a converter sliding tap with the function of blowing argon and a slag blocking method for the whole process tapping, and belongs to the technical field of iron and steel metallurgy. Background technique [0002] In order to optimize the slag blocking technology for converter tapping, more than ten slag blocking methods such as pneumatic slag blocking method, electromagnetic slag blocking method, vacuum slag suction method and siphon tapping method have been invented successively at home and abroad, but the success rate of slag blocking is low and the effect is ineffective. Ideal, in recent years, the slag-controlling tapping technology of the converter sliding tapping hole developed in China has high slag blocking success rate and good slag blocking effect, and has been widely used, but there are still the following problems or deficiencies in production and application: (1) converter sliding The sliding plate is used to block ...

AI Technical Summary

Problems solved by technology

[0006] Aiming at the deficiencies of the prior art, the present invention provides a sliding taphole of the converter with the function of blowing argon and a method of blocking slag during the whole process of tapping. Eccentrically set the diffusion-type breathable ring. After blowing argon gas, the argon bubbles will form a ring-shaped air curtain barrier in front of the tapping hole, which not only blocks the steel slag that is about to enter the tapping hole with the steel flow, but also effectively reduces the temperature above the tapping hole. The circumferential speed that causes the steel flow to suck into the vortex reduces the height of the generated suction vortex, overcomes the key technical problem of steel slag mixed into the steel flow flowing out of the tap hole, and eliminates the inability of the existing converter to slide the tap hole sliding plate to stop the slag. Block the defects of mid-term slag, realize the whole process of slag tapping in the converter, further reduce the amount of slag in the converter, reduce the erosion and erosion of the steel slag on the inner wall of the steel hole of the tapping hole, the inner nozzle, and the outer nozzle, and improve the service life. life

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