Impurity removing device of medium-frequency induction smelting furnace and impurity removing method

Abstract

The invention discloses an impurity removing device of a medium-frequency induction smelting furnace. The impurity removing device comprises a furnace body and an upper cover, and a flow-adjustable argon blowing module is arranged at the bottom of the furnace body. The impurity removing device is characterized in that a vibration intensity detection module is arranged on the furnace body; an ultrasonic vibration applying module is arranged at the bottom of the upper cover, and a solid inclusion fishing and transferring module and a solid inclusion analyzing module are arranged on the top of the upper cover; the solid inclusion fishing and transferring module comprises a bracket, manipulators and fishing discs; the solid inclusion analyzing module comprises a storing box and a screen mesh,and a weight detection module and a vibration module are arranged at the bottom of the screen mesh; the upper cover is further provided with a gas impurity exhaust port and a gas impurity concentration detection module arranged at the gas impurity exhaust port; and the impurity removing device further comprises a main control module. According to the impurity removing device of the medium-frequency induction smelting furnace, the impurity separation capability can be effectively improved, and the impurity removing effect is good. In addition, the invention provides an impurity removing methodfor the medium-frequency induction smelting furnace.

Description

technical field [0001] The invention relates to the technical field of intermediate frequency induction melting furnaces, in particular to a device and method for removing impurities of intermediate frequency induction melting furnaces. Background technique [0002] At present, for steelmaking in medium frequency induction melting furnaces, the method of blowing argon at the bottom of the furnace is generally used to remove impurities from the molten steel. In addition to a certain air permeability, the brick must also be able to withstand the erosion of molten steel, have a certain high temperature strength and good resistance to rapid cooling and rapid heating, and generally use high-alumina bricks; the pH of the blown argon bubbles 2 and pN 2 It tends to zero, so that the dissolved hydrogen and nitrogen in the molten steel enter into the argon bubbles and are carried out. The oxygen in the molten steel, including dissolved oxygen and oxide inclusions, is generated in the...

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Problems solved by technology

[0003] But the following technical problems exist in the impurity removal device of the existing intermediate frequency induction melting furnace: at the beginning, the concentration of impurities on the interface is zero, and the reaction power is the largest at this time, increasing the argon blowing flow rate can improve the impurity removal capacity; but as time passes As time goes on, the concentration of impurities on the interface will gradually increase, the reaction force will become smaller, and the reaction speed will slow down. Finally, when the balance is reached, the precipitation of impurities will stop. Strong, not only will gaseous impurities such as nitrogen be reabsorbed to reduce the impurity removal ability, but also will refine the formed solid inclusions, affecting the impurity removal effect

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