Electroslag smelting method

Abstract

The invention discloses an electroslag smelting method. The electroslag smelting method is characterized in that two electrode devices are arranged beside a crystallizer and used for smelting in the crystallizer by turns, an electrode is installed on one electrode device and preheated when the other electrode device is used for smelting, an electrode of the electrode device used for smelting is moved away after smelting is completed, the preheated electrode is moved into the crystallizer for smelting after slag is fed again and the crystallizer is arranged well, and the process is repeated so as to achieve high-efficiency electroslag smelting. The electroslag smelting method has the advantages of high smelting efficiency and safety, excellent smelting effect, high efficiency, energy conservation, higher electroslag steel ingot smelting quality, great convenience in maintenance and replacement of the bottom water tank, lower maintenance cost and higher cooling efficiency.

Description

technical field [0001] The invention relates to an electroslag furnace smelting technology, in particular to an electroslag smelting method. Background technique [0002] Electroslag smelting furnace is a kind of equipment for electroslag remelting. The structure of the electroslag smelting furnace mainly includes a furnace-shaped crystallizer as a whole, and an electrode device located on one side of the crystallizer. The lower end of the crystallizer is provided with a bottom water tank for cooling. The electrode device includes a pillar, and the movable sleeve on the pillar is equipped with a cross arm. , the cross arm is facing the crystallizer to install the electrode extending down into the crystallizer. The electrode includes the upper part for the fixed part connected with the cross arm and the lower part for the smelting part that is integrated into the electroslag during smelting; it also includes the smelting part for controlling The lifting mechanism that lifts ...

AI Technical Summary

Problems solved by technology

[0004] But this existing electroslag smelting furnace has the following defects: 1. Electroslag smelting is generally a process of batch smelting, but when the existing electroslag smelting furnace works with a single system, the smelting process needs to be time-consuming. The pre-electroslag loading and electrode clamping preparation are all time-consuming, which makes the overall smelting production efficiency relatively low

2. During the smelting process, the electrode is inserted into the electroslag and then energized and heated, and there is a huge temperature difference between the new billet and the molten pool when the electrode blanks are alternated. Explosion or block falling occurs; falling into molten steel in the mold below will affect production at least, and bring operational danger to electroslag smelting production

The more serious impact is that after the new electrode blank enters the molten pool, the temperature of the molten pool in the crystallizer will suddenly drop due to the excessive temperature difference between the end of the blank and the molten pool, breaking the normal melting environment.

As a result, quality defects such as shells, slag grooves, uneven composition, and impurities appear in the electroslag ingot, which seriously affects the smelting quality of the electroslag steel ingot.

3. In addition, the existing bottom water tank structure of the crystallizer still has the disadvantage of inconvenient disassembly and assembly, which is not conducive to maintenance

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