External sleeve of automatic steel ladle flow guiding device

Abstract

The invention discloses an external sleeve for an automatic steel ladle flow guiding device. The external sleeve is provided with a thin-wall steel cylinder for containing stuffing sand; the upper endof the thin-wall steel cylinder is closed, and the lower end of the thin-wall steel cylinder is of an open structure; the lower end of the thin-wall steel cylinder is sealed through low-temperature molten plastic; two long-strip-shaped holes are formed side by side in a side wall of the thin-wall steel cylinder in the length direction of the side wall, wherein the side wall extends out of the bottom of a steel ladle; an included angle between the two long-strip-shaped holes is 85-95 degrees; and the two long-strip-shaped holes are sealed by the low-temperature molten plastic. Compared with the prior art, the external sleeve enables the stuffing sand fills the space between a flow guiding rod and a nozzle brick cup, and has the advantages of high pouring rate, easiness in operation, labor-saving and material-saving performance.

Description

technical field [0001] The invention belongs to the technical field of ladle drainage, and in particular relates to an external casing of a ladle automatic drainage device. Background technique [0002] Ladle drainage is a key technology in iron and steel smelting. The traditional method generally uses the ladle nozzle to fill the drainage sand to realize the drainage and start pouring, which is called the sand filling method. When the drainage sand fails to automatically drain, it is necessary to use an oxygen lance to burn and blow for forced pouring. However, oxygen-rich burning and blowing will increase the oxygen content of molten steel and cause steel degradation. If the burning and blowing time is too long or the burning and blowing fails, will result in a production stoppage. Therefore, the automatic drainage rate is an important indicator to evaluate the quality of drainage agents. The drainage sand with excellent performance and high automatic drainage rate can r...

AI Technical Summary

Problems solved by technology

Because there is a certain gap between the drainage rod and the nozzle, and there is a conical space between the drainage rod and the nozzle block, the drainage sand of the above two patent drainage devices cannot completely fill the conical space when the ladle is erected. When the ladle is erected, the high-temperature steel slag flow at the bottom side of the ladle flows into the unfilled conical space, which will cause the sintered layer of the drainage sand to thicken and deepen. When pouring begins, the molten steel will The pressure cannot break the sintered layer, so the ladle cannot be drained automatically

Today, with the increasing requirements for the quality of molten steel, automatic ladle drainage is the most basic requirement for drainage sand or drainage devices, because if the ladle cannot be automatically drained, it needs to burn oxygen, which will aggravate the secondary oxidation of molten steel, resulting in inclusions increase, which affects the quality of molten steel, and greatly increases the safety hazards of oxygen burning operators, and also disrupts the normal production rhythm

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