RH refining device

Abstract

The invention discloses a RH refining device which comprises a steel ladle (1) and a vacuum slot (2), wherein the steel ladle (1) and the vacuum slot (2) communicate through an ascending impregnation tube (3) and a descending impregnation tube (4) which are parallel; and cross sections of the ascending impregnation tube (3) and the descending impregnation tube (4) are oval. According to the device, by changing the shapes of the sections of the impregnation tubes, equivalent diameters of the RH impregnation tubes are increased, so that the problem that loop flow of molten steel is difficult to increase is radically solved.

Description

technical field [0001] The invention belongs to the field of RH refining production, in particular, the invention relates to an RH refining device. Background technique [0002] The RH refining process is named after the two German companies Ruhstahl and Heraeus that first developed this process. It is a secondary refining process for molten steel used to produce high-quality steel. The entire molten steel metallurgical reaction is carried out in a vacuum tank lined with refractory lining. The lower part of the vacuum tank is two dipping tubes with refractory lining, and the upper part is equipped with a hot bend. The gas flows from the hot bend and water-cooled bend to the vacuum pump system through the gas cooler. Before the molten steel is treated, the dipping tube is immersed in the ladle molten steel to be treated. When the vacuum tank is evacuated, the pressure difference between the atmospheric pressure on the surface of the molten steel and the pressure in the vacu...

AI Technical Summary

Problems solved by technology

[0006] The object of the present invention is to provide a RH refining device, which improves the equivalent diameter of the RH dipping tube by changing t

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