Electric furnace system for electroslag metallurgy

Abstract

The invention discloses an electric furnace system for electroslag metallurgy, comprising a crystallizer in a furnace shape and an electrode unit disposed on one side of the crystallizer. The lower end of the crystallizer is provided with a bottom water tank used for cooling. The electric furnace system further comprises an electrode preheater located on one side of the electrode unit; the electrode preheater comprises a shell; refractory insulating material is disposed within the shell, and the shell is centrally provided with a heating chamber which is vertically set, the upper end of which is open and which allows insertion of the lower end of an electrode; an inductive coil spirally and liftably around the heating chamber is buried in the refractory insulating material, forming a heater. The electric furnace system with a preheating function is high in smelting efficiency, good in safety, good in smelting effect, safe, efficient and energy saving; smelting quality of slag ingots is improved; the bottom water tank is convenient to maintain and change, maintenance cost is lower, and cooling efficiency is improved.

Description

technical field [0001] The invention relates to an electric furnace device for electroslag smelting, in particular to an electric furnace device for electroslag smelting. Background technique [0002] The electroslag smelting electric furnace device is a kind of electroslag remelting smelting equipment. The structure of the electroslag smelting electric furnace device 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, and the electrode device includes a pillar. The movable sleeve on the pillar is equipped with a horizontal The arm, on which the electrode extending downwards into the crystallizer is installed facing 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 ...

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Problems solved by technology

[0004] But this existing electroslag smelting electric furnace device has the following defects: 1. Electroslag smelting is generally a process of batch smelting, but when the existing electroslag smelting electric furnace device works in a single system, it takes time to remove the smelting process. , the loading of electroslag before smelting and the preparation of electrode clamping are 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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