Fluxes can be used for the purification of aluminum melt. ?

In the process of aluminum alloy melting, ? hydrogen and oxide inclusion are the main substances polluting aluminum melt. ? flux refining is a common purification method. ? is mainly by adding appropriate flux to the melt, ? will react physically and chemically with impurities in the melt, ? will form light solid phase components into the slag, ? will be removed in the slag operation, ? so that the melt can be purified. ? This method can effectively remove oxidizing inclusions and some gases ? though not clean. ?

The commonly used refining agent is based on chloride. ? adds fluoride such as CaF2, ?Na3AlF6, etc. to adsorb, ? dissolves Al2O3, and ? to increase the purification effect. ? These fluxes are sprinkled on the surface of the aluminum alloy melt during refining, ? because they are less dense than liquid aluminum ? they float on top. ? After stirring and resting, ? remove the slag above the alloy and sprinkle a layer of covering agent, ? refining can be poured 1. ?

In addition, ? there have been studies on the use of a mixture of chlorine and nitrogen to purify liquid aluminum. ? on the one hand, this method removes hydrogen and separates oxides, ? on the other hand, removes some metallic impurities (? such as magnesium) ? from aluminum. ? is commonly used as 90% nitrogen +10% chlorine gas, ? is also used as 10% chlorine +10% carbon dioxide +80% nitrogen combination, ? carbon dioxide to make chlorine and nitrogen better diffusion, ? shorten the operation time. ?

In summary, ? flux plays an important role in the purification of aluminum melt. ? through the physicochemical reaction and adsorption dissolution, ? can effectively remove impurities and gases in aluminum melt, ? thus improving the quality and properties of aluminum and aluminum alloys. ?