C - Chemistry – Metallurgy – 22 – B
Patent
C - Chemistry, Metallurgy
22
B
307/19, 53/351
C22B 4/00 (2006.01) C22B 9/22 (2006.01)
Patent
CA 1061843
ABSTRACT OF THE DISCLOSURE The disclosure relates to a method and apparatus for recycling, smelting, and refining waste metal material and low grade metal material. A magneto-plasma provides a high tempera- ture for extracting metals. The magneto-plasma is comprised of an alternating current plasma superimposed upon a direct current plasma with the plasma being confined by an externally applied axial magnetic field.. The magneto-plasma is sustained with reduced voltage fluctuations across the plasma even when the background gas of the plasma is contaminated by the products from the smelting operation. The metal material being smelted is caused to melt by the high temperatures within the magneto- plasma which can be in the range of 10,000° X. The metal material upon being melted into droplets is exposed to the high temperature of the magneto-plasma for a predetermined period of time as the droplets descend through the plasma. The length of the magneto-plasma is adjusted to obtain refining of the drop- lets of molten metal within the plasma. In addition, the lateral cross section of the length of the magneto-plasma is adjusted to enhance refining of the molten metal droplets.
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