Water-cooling furnace cover of ladle refining furnace and using method thereof

Abstract

The invention discloses a water-cooling furnace cover of a ladle refining furnace and a using method thereof. The water-cooling furnace cover comprises a furnace cover body, a main exhaust flue and adust removing pipeline. The lower end of the furnace cover body is opened and is fixedly connected with a skirt flue, the upper end of the furnace cover body is opened and is provided with a supporting ring, a refractory furnace ring is placed on the supporting ring, and a smoke hood is arranged on the refractory furnace ring in a covering mode; a first lateral suction flue and a second flue lateral suction flue are formed in the upper portion of the skirt flue, and the second flue lateral suction flue is connected with the side wall of the smoke hood through a second flange connecting pipe; and the main exhaust flue is of a three-channel structure made by heat-resistant steel in a welded mode and comprises a first channel, a second channel and a third channel, the first channel is connected with the smoke hood through a first flange connecting pipe, the second channel is connected with the first lateral suction flue, and the third channel and the dust removing pipeline are connected through a flexible sealing piece in a dynamically sealed mode. The water-cooling furnace cover has the good dust removing effect and is small in air consumption volume, the requirement for the micro-positive pressure in the furnace in the refining process is ensured, and meanwhile, the purposes of reducing energy consumption and reducing electrode consumption are achieved.

Description

technical field [0001] The invention belongs to the field of metallurgical equipment, in particular to a water-cooled furnace cover for a ladle refining furnace and a method for using the same. Background technique [0002] The ladle refining furnace (LF) is one of the main equipments for molten steel refining. The water-cooled furnace cover is the main component of the ladle refining furnace. The rationality of its structure will directly affect the normal production of the refining furnace equipment. During the refining process of the ladle refining furnace, especially during the slag melting stage, a large amount of flue gas will come out, causing environmental pollution. Many enterprises increase the exhaust air volume or build a large dust removal hood above the refining furnace. The large dust removal hood not only occupies an area Large, and affect operation and maintenance. [0003] In addition, the refining process requires the furnace to always maintain a slightly...

AI Technical Summary

Problems solved by technology

During the refining process of the ladle refining furnace, especially during the slag melting stage, a large amount of flue gas will come out, causing environmental pollution. Many enterprises increase the exhaust air volume or build a large dust removal hood above the refining furnace. The large dust removal hood not only occupies an area Large, and affect operation and maintenance

[0003] In addition, the refining process requires the furnace to always maintain a slightly positive pressure reducing atmosphere, which can not only prevent the intrusion of cold air from outside, causing problems such as nitrogen and oxygen increase, but also take away a lot of heat, reduce the heating efficiency, and increase electrode consumption

In order to obtain micro-positive pressure, many enterprises have modified the furnace cover, and even the furnace cover is not equipped with dust removal pipes. However, due to the "chimney effect" in the furnace cover, it is still impossible to achieve "micro-positive pressure" control in the furnace

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