A device and method for making steel by using induction furnace and electroslag liquid casting

Abstract

The invention discloses a device for making steel by liquid casting through an induction furnace and electroslag. The device comprises the induction furnace, a vacuum degassing furnace and an electroslag liquid casting furnace which are sequentially arranged, wherein the vacuum degassing furnace is provided with a suction tube and a liquid feeding pipe; the suction tube is inserted into the induction furnace; the liquid feeding pipe is inserted into the electroslag liquid casting furnace; and the liquid level height in the electroslag liquid casting furnace is lower than the liquid level height of the induction furnace. The invention further discloses a steelmaking method. Liquid steel in the induction furnace is protected and cast into the electroslag liquid casting furnace by adopting the siphon phenomenon. The device and the method disclosed by the invention have the advantages of high safety coefficient, small occupied area of a workshop, high production efficiency, low productionand investment cost, excellent product quality and the like.

Description

technical field [0001] The invention relates to the technical field of iron and steel metallurgy, in particular to a device and method for making steel by using an induction furnace and electroslag liquid casting. Background technique [0002] Electroslag remelting is a method of remelting cast slabs by using Joule heat generated when current passes through slag as a heat source. Because the electroslag ingot produced has the advantages of dense structure, less defects such as looseness and segregation, small and dispersed inclusions, high cleanliness, uniform chemical composition, and smooth surface, it is widely used in the production of high-quality special steel. [0003] The traditional method of smelting special steel electroslag ingots is to cast the molten steel into slabs by film casting / continuous casting after refining the liquid steel, and then use the electroslag remelting furnace to remelt the slabs into molten steel, cool and crystallize to form electroslag in...

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Problems solved by technology

[0005] But this method injects the molten steel in the ladle into the process of the tundish, which easily causes the secondary oxidation of the molten steel and the increase of the inclusion content; simultaneously, the tundish containing the molten steel is placed on the electroslag liquid casting furnace, which increases the The height of the equipment platform, the tundish is located above the electroslag liquid casting furnace, and the risk factor increases; for the electroslag remelting industry with many product varieties and small-scale production characteristics, it adopts electric arc furnace / converter-LF furnace-induction tundish —The production process of electroslag liquid casting cannot meet the characteristics of the electroslag remelting industry due to lack of flexibility, and has limitations

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