The aluminum casting granular flux is basically smokeless and non-toxic when used, and the effect of removing inclusions is far better than that of the traditional powder refining agent. At the same time, the burning loss of aluminum can be significantly reduced.
In the process of aluminum alloy smelting, inclusions and gases are often generated, which greatly affects the quality of ingots and aluminum products. Common inclusions include oxides, carbides, nitrides, borides, etc. Among them, oxides pollute the aluminum alloy melt the most. These inclusions not only provide carriers for gas, but also make the increase of gas content in the melt, also tends to cause defects such as slag inclusion and looseness in the ingot.
In addition, the impure raw and auxiliary materials used in smelting aluminum alloys will also bring some harmful impurities to the melt, such as alkali metals such as Na, Ca, Li, etc., which reduce the physical and chemical properties of aluminum alloys.
Therefore, in the production of aluminum alloy materials, there are strict regulations on the slag content, gas content, and impurity element content in the aluminum alloy melt.
In order to remove the gas and inclusions in the aluminum alloy melt, the aluminum melting and casting industry usually use a mixed refining agent of inert gas (N2, Ar, etc.) and powder flux. And in order to remove harmful elements (Na, Li, Ca) are refined with chlorine-containing gas.
However, this traditional refining process has many shortcomings, such as a large number of harmful gases and smoke containing chlorine and fluorine are produced, which pollutes the environment. The powder mixed refining agent exists in the melt in solid form, which is harmful to slag inclusions. The effect of adsorption and dissolution is not obvious, and the effect of degassing and slag removal is limited. If the operation is improper, it is easy to form flux inclusions and pollute the aluminum alloy melt. The local high temperature chemical reaction during the refining process will cause severe aluminum oxidation burnout and so on.
In view of the above problems in traditional refining methods, AdTech has developed a new type of artificially synthesized smokeless and environmentally friendly composite flux – aluminum casting granular refining flux. The granular refining flux has a good slag removal (oxide, boride and carbide) and impurity removal (alkali metal elements Na, Ca and Li) in the aluminum melt.
