The method of shortening the slag melting time of ladle refining furnace by frequency conversion ultrasonic wave

A frequency conversion ultrasonic and ultrasonic technology, applied in the field of ladle refining, can solve the problems of shortening the ladle refining furnace slag slag time, low production efficiency, slow slag slagging speed, etc. degree of effect

Inactive Publication Date: 2011-12-28
UNIV OF SCI & TECH LIAONING
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Problems solved by technology

[0005] The invention provides a method for shortening the slag melting time of a ladle refining furnace by frequency-conversion ultrasonic waves, which solves the problems of long smelting cycle and low production efficiency due to the slow slag melting speed, and at the same time can improve the removal rate of inclusions, remove impurities in molten steel, and produce clean steel

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  • The method of shortening the slag melting time of ladle refining furnace by frequency conversion ultrasonic wave
  • The method of shortening the slag melting time of ladle refining furnace by frequency conversion ultrasonic wave

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[0013] The method of frequency conversion ultrasonic to shorten the slag melting time of ladle refining furnace includes the following specific contents:

[0014] As shown in the figure, after the converter or the electric furnace is tapped, the molten steel 1 is poured into the ladle 2, and the ladle 2 is placed in the refining station. At the opening of the bottom-blown air-permeable brick 3, start to blow argon and stir, add synthetic slag 7 and Deoxidize the material and turn on the ultrasonic generator at the same time. The ultrasonic generator adopts frequency conversion water-cooled magnetostrictive transducer 5, and three frequency conversion water-cooled magnetostrictive transducers are installed at the position of the slag line on the side wall of the ladle. A horn 6 with mechanical vibration displacement amplification is installed in the transducer, and cooling water 4 is passed through. A tool head 8 matched with the variable frequency water-cooled magnetostrictive tra...

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Abstract

The invention discloses a method for shortening the slag melting time of a ladle refining furnace by frequency-conversion ultrasonic waves, and solves the problems of long smelting cycle and low production efficiency due to slow slag melting speed. The method includes the following steps: tapping out of the converter or electric furnace, pouring molten steel into the ladle, placing the ladle in the refining station, starting the argon blowing and stirring, and adding the slagging material and deoxidizing material while starting the ultrasonic generator, the ultrasonic generator Installed on the side wall of the ladle, the ultrasonic stirring position is on the contact interface between the synthetic slag and the molten steel. The invention can shorten the refining time by more than 10 minutes, can also promote the reaction between synthetic slag and molten steel, and improve the efficiency of removing inclusions and gases. Ultrasonic high-frequency vibration and radiation pressure can form effective agitation and flow in gas and liquid. Improve the operating efficiency of production equipment.

Description

Technical field [0001] The invention relates to a method for ladle refining in a steelmaking process, in particular to a method for shortening the slag refining time of a ladle refining furnace by using frequency conversion ultrasonic waves. Background technique [0002] With the development and technological advancement of national defense, transportation, petroleum and automobile industries in various countries in the world, the requirements for the performance of steel are becoming more and more stringent. Increasing the purity of steel can significantly improve its processing and use performance. Ladle refining is an indispensable key link to ensure the cleanliness of molten steel. Ladle refining is mainly achieved by blowing argon at the bottom of the refining furnace under a reducing atmosphere, combined with reducing refining slag. The rapid formation of refining slag with good foaming and strong desulfurization and deoxidation functions is the guarantee of the ladle refin...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C7/00C21C7/06
Inventor 亢淑梅沈明钢李成威陈华金辉王琳
Owner UNIV OF SCI & TECH LIAONING
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