Device and method for continuously removing impurities from molten metal

Abstract

A device for continuously removing impurities from molten metal includes a molten metal flow path body, an inlet-side closed end plate and an outlet-side closed end plate are provided in the molten metal flow path body so as to form an impurity removal space, an electrode device composed of an inlet-side electrode and an outlet-side electrode that face each other in a longitudinal direction of the molten metal flow path body, a magnetic field device composed of a pair of permanent magnets that face each other in a width direction, sandwich the impurity removal space, and an urging device composed of the electrode device and the magnetic field device applies a Lorentz force downward to molten metal in the impurity removal space so as to increase a density of the molten metal and cause impurities in the molten metal to rise up to a surface of the molten metal.

Description

TECHNICAL FIELD[0001]The present invention relates to a device and a method for continuously removing impurities from molten metal.BACKGROUND ART[0002]Conventionally, productization from molten metal having electrical conductivity (conductivity), that is, non-ferrous molten metal (e.g., Al, Cu, Zn, or Si, alloy including at least two of these, Mg alloy, or the like) or molten metal other than non-ferrous molten metal includes, for example, steps of dissolving raw materials, adjusting components, removing impurities mixed in molten metal, and molding. Removal of impurities is generally referred to as purification of molten metal, and, for example, a ceramic filter is used therefor.[0003]However, since an impurity removal method using a filter is, of course, a filtration method, clogging is likely to occur. Therefore, there is a problem such that the workability is deteriorated and the running cost is increased.[0004]In other words, in a case of a filter type, how large the mesh is se...

AI Technical Summary

Benefits of technology

The patent describes an urging device that uses an electrode and magnetic field to apply a Lorentz force to molten metal. This force increases the density of the metal and causes impurities to rise to the surface. The device can also send molten metal through gaps and improve the purity of the metal.

Problems solved by technology

However, since an impurity removal method using a filter is, of course, a filtration method, clogging is likely to occur.

Therefore, there is a problem such that the workability is deteriorated and the running cost is increased.

However, if the mesh is made fine, clogging is more likely to occur.

For example, clogging may occur instantaneously, and production may stop.

However, it is not preferable to introduce flux into the molten metal in terms of product quality in many cases.

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