C - Chemistry – Metallurgy – 22 – B
Patent
C - Chemistry, Metallurgy
22
B
53/246, 53/358,
C22B 21/06 (2006.01) C22B 9/04 (2006.01)
Patent
CA 1325520
Title: Apparatus for, and method of, purifying a melt, which, besides one or more impurities, essentially contains a light metal, in particular aluminum Abstract Apparatus for purifying a melt which, besides one or more impurities to be volatilized, contains essential- ly a light metal, in particular aluminum. The apparatus comprises a vacuum processing vessel, a vacuum pump, one or more conduits for supplying the melt to the vacuum processing vessel and means for spraying the melt into the vacuum processing vessel. According to the invention, the vacuum processing vessel is provided with discharge means for discharging impurities expelled from the melt. The discharge means are connected to a means for separating the impurities in solid or liquid form, connected to the vacuum pump used for maintaining the subatmospheric pressure in the vacuum processing vessel. Connected to the vacuum processing vessel are at least one supply conduit and one return conduit for the melt, the supply conduit being provided with a pump for the melt to be purified and a spray nozzle for atomizing the melt supplied by the pump into the vacuum processing vessel. During the purification treatment, a subatmospheric pressure is maintained in the apparatus by the vacuum pump, and the temperature of the melt is maintained at 600°-900°C.
536357
Fetherstonhaugh & Co.
Van Wijk Gijsbert Willem Meindert
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