Aluminum alloy casting refining flux can remove oxide impurities, thereby improving the purity of aluminum alloy.
1. Drying and mixing method
The required salt is fully dried and dehydrated, and then the distribution ratio is formed according to the eutectic point of the high-temperature molten salt, and some components that are beneficial to dehydrogenation and slag removal are mechanically mixed. This method is used to prepare simple refining flux with low quality requirements. Commonly used raw materials for selection include NaCl, Na2CO3, KCl, MgC12, Na3AlF6, BaC12, NaF, K2CO3, etc.
The production process of the drying and mixing method is:
Drying and mixing method can produce non-toxic aluminum alloy casting refining flux, the main component of non-toxic refining flux is NaNO3+C (graphite), and then adding an appropriate amount of refractory bricks for weight gain and buffering and a certain amount of Na2CO3, Na2SiF6.
2. Comprehensive hybrid method
Mixing some required high melting point chloride salts and fluoride salts according to the low eutectic point components, ionizing dehydration treatment, and then mixing with other components of drying is a comprehensive production method to make up for the shortcomings of the above methods.For example: NaCl, KCl, Na3AlF6, and CaF2 required in the refining agent series are mixed and stirred with water. After a few days, the fluidized bed is dried, broken, dried and dehydrated. This is the so-called low-temperature ionization treatment.In this way, eutectic compounds are generated at the particle boundaries to improve the surface activity of their particles, which are mainly used as raw materials for spray refining flux, etc., to facilitate spray refining, or high-temperature melting treatment after mixing.