Petroleum coke melt cover for aluminum and magnesium alloys

Petroleum coke melt cover for aluminum and magnesium alloys

The instant invention relates to a method of preventing metal loss due to oxidation in molten aluminum and magnesium alloys. Specifically, covering the molten alloy surface with a layer of petroleum coke, which subsequently oxidizes at high temperatures to form a layer of carbon dioxide that insulat...

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Hauptverfasser: Fang, Que-Tsang, Lin, Jen C, Kuhn, Timothy A, Haddenhorst, Holger
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Sprache:eng
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creator Fang, Que-Tsang
Lin, Jen C
Kuhn, Timothy A
Haddenhorst, Holger
description The instant invention relates to a method of preventing metal loss due to oxidation in molten aluminum and magnesium alloys. Specifically, covering the molten alloy surface with a layer of petroleum coke, which subsequently oxidizes at high temperatures to form a layer of carbon dioxide that insulates the alloy melt from ambient air oxygen, significantly reduces metal loss from the molten alloys due to oxidation. A method for preventing oxidation of molten aluminum alloy and magnesium alloy surfaces, the method comprising providing a molten aluminum alloy or magnesium alloy having a molten aluminum or magnesium alloy surface; covering the molten aluminum or magnesium alloy surface with an initial layer of petroleum coke, the initial layer of petroleum coke having an initial layer thickness of about 0.75 inches; oxidizing a portion of the initial layer of petroleum coke to form a working layer of petroleum coke covering the molten metal surface, the working layer of coke having a working layer thickness of about 0.5 inches, and a layer of carbon dioxide immediately adjacent to and contiguous with the working layer of petroleum coke; and adding additional petroleum coke to the working layer of petroleum coke to maintain the working layer thickness at about 0.5 inches.
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A method for preventing oxidation of molten aluminum alloy and magnesium alloy surfaces, the method comprising providing a molten aluminum alloy or magnesium alloy having a molten aluminum or magnesium alloy surface; covering the molten aluminum or magnesium alloy surface with an initial layer of petroleum coke, the initial layer of petroleum coke having an initial layer thickness of about 0.75 inches; oxidizing a portion of the initial layer of petroleum coke to form a working layer of petroleum coke covering the molten metal surface, the working layer of coke having a working layer thickness of about 0.5 inches, and a layer of carbon dioxide immediately adjacent to and contiguous with the working layer of petroleum coke; and adding additional petroleum coke to the working layer of petroleum coke to maintain the working layer thickness at about 0.5 inches.</abstract><oa>free_for_read</oa></addata></record>
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title Petroleum coke melt cover for aluminum and magnesium alloys
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