Power transmission method for ladle refining furnace

Abstract

The embodiment of the invention provides a power transmission method for a ladle refining furnace. The method comprises the following steps that a first preset voltage is adopted to transmit power tothe ladle refining furnace, the power transmission current is a first preset current, and the power transmission time is 1 to 2 minutes; under the condition that electric arcs are stable, the voltageis adjusted to a second preset voltage and the current is adjusted to a second preset current online, and the power transmission time is kept to be 9-10 minutes; and a third preset voltage is adoptedto supply power to the ladle refining furnace, and the power supply current is a third preset current. The method overcomes the defects in the prior art, in the control process of the ladle refining furnace and in the molten steel heating process through LF furnace power transmission, nitrogen molecules in air are ionized under the action of high-current electric arcs, N2=[N]+[N], a large number of nitrogen atoms enter molten steel, the performance of steel is affected by the too high N content, and the plasticity and impact toughness of the steel are reduced.

Description

technical field [0001] The invention relates to the technical field of ladle refining furnace control, in particular to a method for power transmission to a ladle refining furnace. Background technique [0002] LF furnace (LADLE FURNACE) is the ladle refining furnace, which is the main refining equipment outside the furnace in steel production. LF furnace generally refers to the refining furnace in the steel industry, which is actually a special form of electric arc furnace. [0003] In the prior art, during the control process of the ladle refining furnace, during the process of heating the molten steel by feeding electricity to the LF furnace, the nitrogen molecules in the air are ionized under the action of a high-current arc, N2=[N]+[N], a large number of Nitrogen atoms enter the molten steel, and excessive N content affects the properties of the steel, reducing the plasticity and impact toughness of the steel. [0004] Therefore, it is an urgent problem to be solved i...

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Problems solved by technology

[0005] In view of the above-mentioned technical problems, the purpose of the present invention is to overcome the prior art, in the process of controlling the ladle refining furnace, the nitrogen molecules in the air are ionized under the action of a high-current arc during the LF furnace feeding and heating the molten steel, and N2 =[N]+[N], a large number of nitrogen atoms enter the molten steel, too high N content affects the properties of the steel, and reduces the problems of steel shaping and impact toughness, so as to provide a method that can effectively overcome the above technical problems during use. Ladle refining furnace power transmission method

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