A segmented roller pulse current electromagnetic stirring device and method in the second cooling zone of continuous casting

Abstract

The invention discloses a segmented roller pulse current electromagnetic stirring device in the second cooling zone of continuous casting, which comprises two electromagnetic stirring rollers (2), each electromagnetic stirring roller (2) is provided with a pair of iron cores (3) in the middle, two There is a certain distance between the iron cores (3), and the axes of the two are on the same horizontal line, and a group of helical coils (4) are wound around each iron core (3), and the coils (4) and the iron cores ( 2) have the same axes, and the coil (4) is connected to a cooling device (6); the coil (4) is covered with a magnetic shielding ring (5), the magnetic shielding ring (5) is cylindrical, and there is a There is a strip-shaped notch (5a) parallel to the axis, and the notch (5a) faces the continuous casting slab surface to be stirred. The advantages of the present invention are that it is directly modified on the basis of the existing device, no need to buy new equipment, the operation method is simple, the degree of carbon segregation in the slab is reduced, the phenomenon of white bright bands is avoided, and the quality of the slab is improved.

Description

technical field [0001] The invention relates to the technical field of iron and steel metallurgy, in particular to a segmented roller pulse current electromagnetic stirring device and method in the second cooling zone of continuous casting. Background technique [0002] With the intensification of competition in the steel industry, the market demand for steel is getting higher and higher. Since segregation, porosity and shrinkage cavities are prone to occur in the process of continuous casting of slabs, the quality of slabs is seriously affected, making it difficult to improve the qualified rate of slabs. In order to improve the quality of the slab and meet the needs of the market, electromagnetic stirring is generally used to improve the quality of the steel. [0003] The electromagnetic stirring technology in the secondary cooling zone of continuous casting is to generate an alternating magnetic field through a energized coil, and induce an induced current in the molten s...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the existing electromagnetic stirring technology is easy to cause the slab to produce "white and bright bands", and provides a segmented roller pulse current electromagnetic stirring device in the second cooling zone of continuous casting, which is directly carried out on the basis of the existing device. Transformation, no need to re-purchase equipment, simple operation method, reduces the degree of carbon segregation in the slab, avoids the phenomenon of white and bright bands, and improves the quality of the slab

Images