The fluxes for aluminum foundry remove the slag inclusion in the aluminum alloy melt mainly through three ways of adsorption, dissolution, and compounding.
Adsorption mainly uses the mechanical and chemical effects of the refining agent to remove the gas and slag inclusions in the melt to achieve the role of purifying the furnace body.
The dissolution is mainly achieved by adding chemicals that can dissolve with the slag in the flux. According to the similar physical and chemical properties, the dissolution is realized and then removed together with the flux. For example, Na3AlF6 can dissolve Al2O3.
The chemical reaction is through the chemical reaction between the deslagging flux and the slag inclusion to generate other easily removable compounds to achieve the purpose of removal, such as Na2SiF6. The Na3AlF6 and AlF3 generated by the reaction of the remaining Al2O3 can be refined through other mechanisms.
The non-metallic oxide inclusions and the matrix of aluminum alloy materials have different performance parameters such as elastic modulus, hardness, and expansion coefficient. Under the action of external force, the inclusions are prone to stress concentration at the sharp corners of the oxidized inclusions, which can cut the matrix structure, make the product leak or be prone to corrosion, and significantly reduce the mechanical properties and stress corrosion resistance. The presence of slag will also reduce the fluidity of the alloy and the ability to fill the mold, and increase the tendency of casting defects. Inclusions can also increase the inhalation tendency of the aluminum melt, and block the diffusion and precipitation of gases, and promote the formation of secondary porosity and voids during the heat treatment process.
Purify the aluminum melt, remove the slag, gas and other harmful substances in the melt, so as to ensure the quality of aluminum alloy castings. The fluxes for aluminum foundry are widely used in smelter and foundries. The refining agent, slag remover, covering agent, and furnace cleaning agent produced by AdTech have different uses. You can choose our products according to your needs.