Aluminum degassing agent is a white powder or granular stream, which is prepared by drying a plurality of inorganic salts and mixing them in a certain ratio, and is mainly used for removing hydrogen and oxidized slag floating inside the aluminum liquid.
The aluminum degassing agent is mainly used to remove the hydrogen inside the aluminum liquid and the floating oxidized slag, so that the aluminum liquid is purer and has the function of removing the slag.
Some components of the aluminum degassing agent easily decompose at high temperatures, and the generated gas easily reacts with hydrogen and has a strong adsorption force with slag, and quickly escapes from the melt. The other components have a slag removal effect.
Aluminum degassing fluxes are applicable to commonly used aluminum alloys (high magnesium alloys and aluminum-magnesium alloys) and pure aluminum smelting, degassing refining, and slag removal.
The refining agent is sprinkled on the surface of the liquid and is quickly squeezed into the aluminum liquid. After being completely stirred, it is left to stand and slag; if it is sprayed, the refining agent is sprayed into the aluminum liquid with an inert gas.
Role of Flux for Melting Aluminum
1. Changing the wettability of molten aluminum to oxide (alumina), so that molten aluminum is easily separated from oxide (alumina), so that most of the oxide (alumina) penetrates the flow and reduces melting. The content of oxides in the body.
2. The flux can change the state of the oxide film on the surface of the melt. This is because it can break up the solid and dense oxide film on the surface of the melt into fine particles, thus making it easier for the hydrogen in the melt to escape from the space between the particles in the layer of. oxide film and enter the atmosphere.
3. The presence of the flux layer can isolate the contact between the water vapor and the aluminum melt in the atmosphere, which makes it difficult for hydrogen to enter the aluminum melt and at the same time prevent time the oxidative loss of the cast iron.
4. The flux adsorbs the oxides in the aluminum smelting to purify the smelting. In summary, the effect of stream refining to remove inclusions is mainly achieved by adsorption, dissolution and chemistry with oxide films and non-metallic inclusions in the melt.