When the aluminum alloy melts, the molten metal refining flux is used to eliminate the hydrogen that forms the hole during the solidification of the molten aluminum alloy, and cleans the molten aluminum alloy by eliminating non-metallic inclusions that cause internal defects.
The recovered scrap is melted in the molten metal by the melting process, the molten metal is refined by the refining process, the slag is removed from the refined molten metal by the slag removal process, and the molten metal is refined for casting to provide a secondary alloy or casting alloy.
To produce molten metal by heating in a furnace. The organic matter attached to the material and the oxide produced by the melting process form various inclusions in the molten metal. The inclusion and metal are mixed to form slag under the action of refining machine, and the slag floats up. Slag is the main cause of product defects, so it must be removed. However, since the slag contains high metal content, metal loss will occur if the slag containing metal is removed. Therefore, the metal contained in the slag must be returned to the molten metal as much as possible, and the inclusions must be effectively removed only through the slag removal process.
A typical slag removal process injects halogen flux on the surface of the molten metal to mix the halogen flux with the slag. Halogen flux reacts with fine aluminum particles contained in slag. The reaction generates reaction heat, which heats the slag to improve the fluidity of the metal contained in the slag, thereby returning the metal to the molten metal. Commonly known degassing methods blow fluxes into molten metal together with inert gases such as nitrogen or argon. The degassing process and slag removal process are very important molten metal refining processes, which are used to clean molten metal and improve product quality.
The processing method of molten aluminum alloy includes the following steps: melting the waste including aluminum alloy into molten metal; and melting the waste aluminum alloy. The slag produced in the refining process of refining molten metal by using refining flux as slag treatment agent.
The flux used in the processing of molten aluminum alloy is used by spraying solvent on the surface of molten metal, forcing flux into molten metal, and blowing out flux together with inert gas. A method of injecting a gas (e.g., nitrogen) into a molten metal or injecting a solid flux of adjusted shape and size into the molten metal. Preferably, the appropriate method is selectively determined according to the type and capacity of the furnace and the desired degree of molten metal processing.