Novel intermediate tank electromagnetic induction metallurgical system

Abstract

The invention provides a novel intermediate tank electromagnetic induction metallurgical system, which can effectively solve the problems of a small number of removed impurities and low removal rate of the conventional intermediate tank molten steel filter technology. The novel intermediate tank electromagnetic induction metallurgical system comprises an intermediate tank and an electromagnetic induction heating system, wherein an injection chamber and a pouring chamber are formed in the intermediate tank; a fireproof partition wall is arranged between the injection chamber and the pouring chamber; a through hole is formed in the fireproof partition wall; the electromagnetic induction heating system comprises an electromagnetic inductor and a power supply control system; an iron core, which is wound with a coil, of the electromagnetic inductor steps over the through hole in the fireproof partition wall; steel flow channels are formed on both sides of the bottom of the fireproof partition wall; the injection chamber and the pouring chamber are communicated with each other through the steel flow channels; the novel intermediate tank electromagnetic induction metallurgical system is characterized in that: the output power of the electromagnetic inductor is 1,000 to 3,000 kilowatts; the diameter of each steel flow channel is 100 to 300 millimeters; and the steel flow channels are 800 to 2,000 millimeters long.

Description

technical field [0001] The invention relates to the technical field of continuous casting electromagnetic smelting, in particular to a novel tundish electromagnetic induction metallurgy system. technical background [0002] The tundish is located between the molten steel tank and the crystallizer, and is used for receiving molten steel in the molten steel tank and injecting molten steel into the crystallizer. With the development of refining technology outside the furnace, the tundish is not just a simple transition vessel for molten steel, but a continuous metallurgical reactor. Many measures used in ladle refining are gradually transplanted to tundish metallurgy to achieve further removal Inclusions in molten steel and the purpose of purifying molten steel. However, due to the large area and high investment of ladle refining equipment, it is difficult to directly apply it to the tundish with relatively narrow equipment space, and the steel flow needs to be stabilized in t...

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Problems solved by technology

However, due to the large area and high investment of ladle refining equipment, it is difficult to directly apply it to the tundish with relatively narrow equipment space, and the steel flow needs to be stabilized in the tundish to reduce the impact and agitation of the steel flow on the crystallizer to achieve stability. The role of the pouring operation

Therefore, in recent years, molten steel filtration technologies such as retaining walls and dams, argon blowing, and ceramic filters have also appeared in tundish metallurgical technologies, as well as thermal insulation and heating technologies for tundishes. However, the technical effects of existing molten steel filtration technologies will be affected. Due to the limitation of steel type and inclusion type, the efficiency of removing inclusions in molten steel is not high; while the existing induction heating technology for heat preservation and heating can remove inclusions due to the disturbance of electromagnetic induction itself on molten steel. There are two main ways to remove the inclusions: one is to accelerate the extrusion of molten steel to the outside of the channel through electromagnetic induction, increase the flow cycle of molten steel, increase heat transfer, accelerate the floating of inclusions through thermal convection, and remove the inclusions. The efficiency is low; the second is that electromagnetic induction will cause the molten steel 8 flowing through the channel 3 to shrink inwardly under the influence of the pinching force 9, and the inclusions 10 of the molten steel 8 will not be affected by the pinching force 9 and will be drawn from the molten steel 8 Precipitation and extrusion to the channel wall, adsorption, see figure 1 , the precipitation and adsorption rate of inclusions in molten steel are easily affected by the power of the electromagnetic induction device, the diameter of the flow steel channel and the length of the flow steel channel, so that the force of extrusion of the inclusions in the molten steel to the channel wall is too small The outflow channel has a poor effect on removing inclusions, so the efficiency of the inclusion removal function attached to the existing electromagnetic induction heating technology is relatively low, and the removal rate of general inclusions is lower than 40%.

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