Double-tube electromagnetic induction rh device and method for heating molten steel and removing inclusions
A technology of electromagnetic induction and inclusions, applied in the field of iron and steel metallurgy, can solve the problems that the removal rate is not particularly obvious, the purity of molten steel is affected, and the operation process is complicated, and the effect of low noise, high heating efficiency and uniform chemical composition can be achieved.
Active Publication Date: 2018-05-29
NORTHEASTERN UNIV LIAONING
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Problems solved by technology
On the one hand, the main function of traditional RH is vacuum decarburization. For inclusions, its removal rate is not particularly obvious. At the same time, in the later stage of the heating process of aluminum addition, a large amount of Al2O3 inclusions will be produced, which will affect the purity of molten steel.
On the other hand, in the early stage of RH vacuum decarburization, LF furnace and CAS-OB are used to heat molten steel, which involves many links, time-consuming and energy-consuming, and the operation process is relatively complicated.
Method used
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[0019] An embodiment of the present invention will be further described below in conjunction with the accompanying drawings.
[0020] A double-tube electromagnetic induction heating RH device for heating molten steel and removing inclusions, such as Figure 1~2 As shown, it includes a ladle 3, a vacuum chamber 1, an ascending pipe 2, a descending pipe 6, an iron core 4 and an induction coil 5, wherein the bottom of the vacuum chamber 1 is provided with an ascending pipe 2 and a descending pipe 6, and the ascending pipe 2 and the descending pipe 6 are The port communicates with the ladle 3, the iron core 4 is a solid square structure, and is arranged around the riser 2 or the downcomer 6, the coil 5 is wound on the iron core part outside the downcomer 6, and the axis of the coil 5 is in line with the axis of the downcomer 6 Keep it vertical.
[0021] The iron core 4 is provided with a support rod 7, which is connected with an external bracket and used for fixing the iron core....
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The invention provides a double-tube electromagnetic induction RH device and method for heating molten steel and removing inclusions. The device includes a ladle, a vacuum chamber, a riser tube, a downcomer, an iron core and an induction coil. The bottom of the vacuum chamber is provided with The lower ports of the riser and downcomers are connected to the ladle. The iron core is a solid structure and is set around the riser or downcomer. The coil is wound around the iron core part outside the riser or downcomer, and the coil is The axis remains perpendicular to the axis of the riser or downcomer. The process steps of the method are: (1) Using the bubble pump principle to cause the molten steel to circulate in the vacuum chamber, riser tube and downcomer; (2) Turn on the air cooling or water cooling device, pass alternating current into the induction coil, and continuously remove Inclusions; (3) When the temperature of the molten steel rises to 10~300°C above the liquidus line, stop the power supply, stop the air cooling or water cooling device, and introduce the molten steel to the next process.
Description
technical field [0001] The invention belongs to the technical field of iron and steel metallurgy, and in particular relates to a double-tube electromagnetic induction RH device and method for heating molten steel and removing inclusions. Background technique [0002] The large demand for steel in the market has promoted the development and improvement of ultra-low carbon steel production technology, and the most critical production process and technical points are the development and application of secondary refining technology for ultra-pure steel such as ultra-low carbon steel. Among the many existing refining technologies outside the furnace, the RH vacuum refining technology has been adopted by most steel companies in the world due to its good refining effect, short processing cycle, strong adaptability, and large processing capacity, and has become a secondary furnace refining technology. The mainstream of refining technology. [0003] The principle of the RH equipment...
Claims
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IPC IPC(8): C21C7/10
CPCC21C7/10
Inventor 雷洪赵岩杨滨
Owner NORTHEASTERN UNIV LIAONING