Importance

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Abstract

The invention relates to a method and a device for melting or processing metal. The metal material is batched into a chamber (1) and circulated from one chamber to another (3, 5, 10, 11, 15, 18) with simultaneous melting under the effect of thermal radiation from the chamber lids. One or more pumps act on the pressure above the molten metal in one or more pump chambers (10, 11), connected with a melt chamber (5) and with a splash chamber (18, 15), from where the melt is discharged or recycled. The object of the invention is to upgrade melt quality by reducing turbulence in the melt chambers. This object has been achieved by transferring, at an increased pressure in the pump chamber, a substantially greater amount, approx. three to fifteen times more melt per time unit from each pump chamber (10, 11) to the splash chamber (18, 15) than from the same pump chamber to the splash chamber (5). This arrangement has been implemented in a device in which the ratio between the cross-sectional surfaces of the ducts (12, 17; 13, 14) between a pump chamber (10; 11) and the preceding melt chamber (5) or the same pump chamber (10; 11) and the consecutive splash chamber (18; 15) is in the range from 3:1 to 15:1, preferably from 5:1 to 10:1.

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First Claim