Abstract: A trough assembly for degassing molten aluminum. The trough assembly comprises a trough adapted for a stream of molten aluminum to flow trough. The trough comprises a central section in which the stream slows down. Removable agitators are adapted to be inserted in the central section of the trough, and used to degassing the molten aluminum. The trough is tiltable to be emptied. In the stream flowing position, the trough is laid over a heating bed to ensure that the aluminum remains liquid. The trough may be equipped with a flexible extension adapted to remain secured thereto when emptying the trough.

Abstract: The present document describes a method and confinement unit for stopping a chemical reaction involving hot metal dross and a gas in the surrounding environment. The method comprises transferring the hot metal dross in a dross pan and placing the dross pan with the metal dross therein in the gastight chamber. Then, the dross pan is sealed with the hot metal dross therein into a gastight chamber of a fixed interior volume. The chemical reaction occurring inside the gastight chamber depletes a limited amount of gas present inside the gastight chamber, thereby stopping once the gas is completely depleted. The gastight chamber is shaped and sealed to withstand a pressure differential created by the depleting of the gas in the fixed interior volume, until the hot dross is cooled and the chemical reaction has stopped.