The role of multi-mode electromagnetic flow control technology

Aiming at the problem that the inclusions and bubbles in the melt in the metal continuous casting process are difficult to purify deeply, the technology of controlling the internal flow of the mold based on the multi-mode electromagnetic field has been studied, and the multi-mode customized magnetic field purification technology and equipment for the metal continuous casting have been developed to solve the problem of continuous metal material. The melt during casting is a difficult problem of deep purification in the two-phase zone of crystallizer solidification. So what is the role of multi-mode electromagnetic flow control technology? What are the applications of multi-mode electromagnetic flow control technology? The following is a detailed introduction.

Here is the content list:

l Effect

l application

effect

1 The practice of slab continuous casting shows that the flow of molten steel in the mold has a great influence on product quality. The flow of molten steel in the mold uses multi-mode electromagnetic control technology to control the floating and separation of inclusions and bubbles

2 The flow of molten steel near the meniscus uses multi-mode electromagnetic flow control technology to dominate the melting, spreading, and entrainment of the mold powder, and the flow of molten steel in the mold is affected by casting parameters such as plate width, pulling speed, and argon gas flow. , SEN design and other four-dimensional combination, so the main purpose of molten steel flow control in the slab mold is to use multi-mode electromagnetic flow control technology to control the horizontal flow rate under the meniscus and increase the molten steel flow rate at the solidification front, reducing the surface and subcutaneous Inclusions and air bubbles. Practice shows that the best flow velocity under the meniscus is 0.12-0.2 m/s; the best flow velocity at the solidification front. The multi-mode electromagnetic flow control technology is used to control the initial solidification and the position of the solidification starting point at the meniscus, shorten the length of the solidification hook, make the blank shell grow uniformly, and reduce the impact of vibration marks, reduce surface cracks and stabilize operation. With the aid of stirring and flowing, the temperature of the molten steel in the mold is made uniform, so that the thickness of the billet shell is uniform.

application

1 Propose the use of multi-mode electromagnetic flow control technology to remove inclusions in alloy continuous casting solidification and control the technical principle of molten metal flow and develop multi-mode electromagnetic field control technology and equipment.

2.The multi-mode electromagnetic control technology is applied to slab continuous casting, which reduces the energy consumption matching the same magnetic induction intensity and electromagnetic force by 13.3%, and the defect rate of automotive steel plates is reduced from 0.58% to 0.23%.

3, The multi-mode electromagnetic flow control technology is applied to the continuous casting of copper round billets, and the produced oxygen-free copper has a hard-state conductivity of 100.1% IACS. The copper material has been used in major scientific devices such as high-energy accelerators in my country.

4. Based on the flow field in the mold, the production of solidified slab shell, the movement behavior of inclusions and bubbles, and the application of multi-mode electromagnetic flow control technology, a method to characterize the behavior of slag entrapment, uniformity of the slab shell and subcutaneous inclusions in the continuous casting mold is proposed. The comprehensive evaluation index system provides an important basis for improving the removal rate of impurities.

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