Patent ID: 7927398

Claim:
A multistage electromagnetic purification method for molten metal comprising the steps of: passing a molten metal having inclusions through a multistage separator, wherein the multistage separator comprises two or more multichannel straight-pass separators bonded consecutively with inorganic high-temperature adhesive, wherein each channel in each of the multichannel straight-pass separators is a square channel having a specific size, a central region and a sidewall region, a first of the multichannel straight-pass separators is bonded to a second of the multichannel straight-pass separators so that inclusions from the molten metal occupy the central region of each channel in the first of the multichannel straight-pass separators, passing to occupy the sidewall region of each channel in the second of the multichannel straight-pass separators; separating the inclusions from molten metal; and obtaining a purified molten metal.