Hood-shaped circulating flow vacuum degassing device and application method thereof

Abstract

The invention relates to the field of vacuum treatment of molten iron alloys, in particular to a hood-shaped circulating flow vacuum degassing device. The hood-shaped circulating flow vacuum degassingdevice comprises a steel ladle trolley (1) and a steel ladle (2), and is characterized by further comprising a bottom blowing argon valve station (3), an insertion hood (4), a vacuum degassing tank (5), an alloy material charging device (6), a top blowing oxygen gun (7), a hot bending pipe (8) and a dry-type mechanical vacuum pump exhaust device (9); the vacuum degassing tank (5) is arranged overan opening of the steel ladle (2); the bottom of the vacuum degassing tank (5) is connected with the top of the insertion hood (4); the bottom of the insertion hood (4) is provided with a deslaggingtank (41). An application method of the hood-shaped circulating flow vacuum degassing device is characterized by comprising the following steps of a, deslagging and b, steel making. The hood-shaped circulating flow vacuum degassing device and the application method thereof have the advantages of rapid degassing, inclusion removal, high adaptability, high efficiency and low consumption.

Description

technical field [0001] The invention relates to the field of vacuum treatment of molten ferrous alloys, in particular to a cover-shaped circulating vacuum degassing device and a method for using the same. Background technique [0002] The structure of the existing RH vacuum degassing device is as follows: figure 1 As shown, the ladle trolley 1, the ladle 2, the dipping tube lifting gas valve station 31, the vacuum lower tank 40, the vacuum upper tank 51, the alloy feeding device 6, the top blowing oxygen lance 7, the hot bend pipe 8 and the exhaust gas of the steam vacuum pump The system 90 is composed of two immersion tubes, an ascender and a descender, below the vacuum lower tank 1 . This degassing device has the following problems, which restrict the further development of the RH vacuum degassing device: 1. The two dipping tubes cannot discharge slag; 2. The circulating air volume of the dipping tube is large, which affects the vacuum degree and the subsequent suction an...

AI Technical Summary

Problems solved by technology

This degassing device has the following problems, which restrict the further development of the RH vacuum degassing device: 1. The two dipping tubes cannot discharge slag; 2. The circulating air volume of the dipping tube is large, which affects the vacuum degree and the subsequent suction and dust removal device; 3. . The life of the dipping tube is short, the loss of refractory material is large, and the maintenance is difficult

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