Abnormal sealing device of iron mouth of blast furnace and use method of abnormal sealing device

Abstract

The invention relates to an abnormal plugging device of an iron mouth of a blast furnace. The abnormal plugging device includes a bowl cover protective sleeve, the bowl cover protective sleeve has a large radius at one end and a small radius at the other end, the end with the small radius is installed on the inner side of a hydraulic mud gun nozzle, an iron mouth mud sleeve covers the end with thelarge radius inside, and the iron mouth mud sleeve is fully sealed. In the process of blast-furnace casting, the iron mouth mud sleeve is damaged and not repaired in time, and a hydraulic mud gun protective sleeve is damaged and not replaced in time; and when the blast furnace needs to plug the iron mouth urgently, the bowl cover protective sleeve is used for plugging the iron mouth, and the mud-pumping phenomenon of the iron mouth in the process of plugging can be avoided, so that the risk of safety accidents in front of the blast furnace due to failure to plug the iron mouth in emergency islowered.

Description

technical field [0001] The invention belongs to the technical field of the metallurgical industry, and relates to a device for abnormally blocking a blast furnace tap hole and a method for using the same. Background technique [0002] The blast furnace taphole is the most critical part of the blast furnace, mainly composed of taphole mud sleeves, taphole channels, etc. During the normal production process of the blast furnace, it is necessary to discharge the slag and iron produced by smelting from the blast furnace taphole on time, so as to achieve the purpose of continuous blast furnace smelting. When the blast furnace hearth slag and iron are clean, there will be wind from the iron hole, and plugging operation is required. The plugging of the blast furnace is to use the mud gun equipment filled with anhydrous taphole mud to seal the taphole after the blast furnace taphole is blown, and then press the anhydrous tappet mud into the taphole hole. After 5-20 minutes, the anh...

AI Technical Summary

Problems solved by technology

When the iron mouth is blocked, the nozzle of the hydraulic mud gun is in contact with the slag iron for a long time, and the nozzle is more likely to be burned

After the nozzle of the hydraulic mud gun is burnt, a large gap is formed between the mud sleeve surface, which will cause mud to be blocked at the iron hole, and then cause the hydraulic mud gun to release pressure, or even fail to block the iron hole.

Mud leaking from the blocked iron hole will largely cause the iron hole to become shallow, or the iron hole of the lower furnace will leak iron; if the iron hole cannot be blocked, the problem will be more serious. mouth

If the blast furnace needs to block the iron hole urgently, and the iron hole cannot be blocked, even in the case of a large reduction in wind and pressure, a small amount of slag and iron will still flow out of the blast furnace iron hole, which will seriously affect the safety of the blast furnace

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