Secondary refining method of 10 to 30 tons bottom breakout ladle

Abstract

The invention relates to an external furnace refining technology for a bottom leakage steel ladle of 10 to 30 tons, in particular to the external furnace refining technology for the bottom leakage steel ladle of 10 to 30 tons. A method of the invention mainly adopts an early electroslag protection technology, an electroslag heating technology, a long-term argon blowing refining technology, a plugstick adhesion prevention technology, a plugstick deformation prevention technology, an air coiling and mingling prevention technology, a furnace brick lining protection technology, etc. The technology successfully solves the problems that the argon blowing refining time is not enough, air coiling and mingling and plugstick deformation are prevented, the steel ladle can not be opened, etc. The technology reasonably designs the electrical heating output power, an argon blowing position, the argon blowing amount and the argon blowing time, effectively carries out degassing, desulphurization, impurity removal, etc. to molten metal and remarkably improves the quality of molten steel. Through carrying out electroslag hating to the steel ladle of 10 to 30 tons, the technology carries out argon pumping and refining for a long time, and uses graphite as electrodes; and the output power can meet the power needed when a temperature reduction speed is the rapidest and ensure that the temperature of the molten steel is stable and is not reduced.

Description

technical field [0001] The invention relates to an out-of-furnace refining technology for a 10-30 ton bottom leak ladle, in particular to an out-of-furnace refining method for a 10 to 30 ton bottom leak ladle. Background technique [0002] With the continuous development of the industry, the traditional steelmaking process and equipment are difficult to meet the high-quality requirements, so the external refining technology must be adopted. In recent years, with the advancement of pure steel production technology and the requirement to reduce production costs, the refining process and equipment outside the furnace have become popular rapidly. At present, the out-of-furnace refining methods popularized on an industrial scale can be divided into the following categories according to their characteristics: vacuum degassing method, ladle refining method, and AOD method, and the bottom blowing argon technology is widely used in these methods. The argon blowing steelmaking techno...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a 10-30 ton bottom leaking ladle refining method outside the furnace, which mainly adopts early electroslag protection technology, electroslag heating technology, long-time argon blowing refining technology, technology for preventing plug sticking, preventing plug rod Deformation technology, avoiding gas entrainment, inclusion technology and furnace lining protection technology have successfully solved the problems of insufficient argon blowing refining time, prevention of entrainment gas inclusion, deformation of stopper rod, and inability to open the ladle, etc.

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