Furnace mouth flue utilizing gas partition layer to prevent slagging

Abstract

The invention discloses a furnace mouth flue utilizing a gas partition layer to prevent slagging. The furnace mouth flue comprises a furnace mouth flue body which is formed by a furnace mouth vertical-section flue and a furnace mouth inclined-section flue, wherein a plurality of first spray tubes with spray holes extending into furnace mouth vertical-section flue are uniformly distributed on the furnace mouth vertical-section flue, and a plurality of second spray tubes with spray holes extending into furnace mouth inclined-section flue are uniformly distributed on the furnace mouth inclined-section flue on a gas flow windward side of the furnace mouth inclined-section flue; all first spray tubes and second spray tubes are simultaneously communicated with a steam and gas total tube by virtue of connecting pipelines; the steam and gas total tube is simultaneously communicated with a steam tube and a nitrogen gas tube; a first valve capable of opening or closing the steam tube is arranged on the steam tube; a second valve capable of opening or closing the nitrogen gas tube is arranged on the nitrogen gas tube; the steam tube is communicated with a steam pocket; the nitrogen gas tube is connected with a nitrogen gas storage tank. The furnace mouth flue disclosed by the invention has the advantage that the inner wall of the flue can be prevented from slagging.

Description

technical field [0001] The invention relates to a furnace mouth flue which utilizes an air barrier to prevent slagging. Background technique [0002] In the steelmaking industry, the currently used furnace mouth flue includes the furnace mouth vertical section flue and the furnace mouth oblique section flue. After entering the flue of the furnace mouth, and passing through the flue of the inclined section of the furnace, it is discharged into the dust removal system from the outlet of the flue of the inclined section of the furnace. The disadvantage of this furnace mouth flue is: because the converter produces a large amount of impurities in the flue gas during the blowing process, when the flue gas passes through the flue of the vertical section of the furnace mouth and the flue of the inclined section of the furnace mouth, a large amount of impurities in the flue gas It is very easy to adhere to the inner wall of the flue in the vertical section of the furnace mouth and t...

AI Technical Summary

Problems solved by technology

The disadvantage of this furnace mouth flue is: because the converter produces a large amount of impurities in the flue gas during the blowing process, when the flue gas passes through the flue of the vertical section of the furnace mouth and the flue of the inclined section of the furnace mouth, a large amount of impurities in the flue gas It is very easy to adhere to the inner wall of the flue in the vertical section of the furnace mouth and the inner wall of the flue in the oblique section of the furnace mouth facing upwards (that is, the windward side of the flue air flow in the oblique section of the furnace mouth), and float on the surface of molten steel at the same time Under the action of the upward hot air flow produced by converter blowing, the steel slag is also easily splashed on the inner wall of the flue in the vertical section of the furnace mouth and the windward surface of the flue airflow in the oblique section of the furnace mouth. These steel slag and flue gas impurities adhere to the furnace mouth Slagging is easy behind the inner wall of the flue, which not only greatly reduces the service life of the flue at the furnace mouth, but also creates hidden dangers for safe production, and the labor intensity of workers to deal with slagging is high

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