Refining agent for aluminum alloy melting

Abstract

The invention relates to a refining agent for smelting an aluminum alloy. The refining agent is characterized by comprising the following components by mass percent: 35% to 45% of NaCl, 25% to 35% of KNO3, 3% to 8% of CaF2, 6% to 10% of Na2SiF6, 7% to 12% of Na3AlF6, 5% to 10% of graphite and 0.5% to 1.5% of rare earth. The refining agent has the characteristics of good refining effect, strong degassing capacity and the like, and cannot generate noxious gas during a production process.

Description

technical field [0001] The invention relates to the field of smelting and processing of aluminum alloys, in particular to a refining agent for smelting aluminum alloys. Background technique [0002] Aluminum alloys inevitably absorb and carry gases and produce inclusions during the smelting process, which will reduce the purity of aluminum alloys and affect the quality. Therefore, it is necessary to refine and purify the aluminum alloy smelting process to remove these gases and inclusions and improve the quality of the aluminum alloy. Adding a refining agent to the aluminum alloy for refining and purification is a commonly used measure. [0003] At present, domestic aluminum alloy smelting mainly adopts the adsorption refining method of adding various fluxes, including the refining method of introducing nitrogen and using chlorine salt as a refining agent. Commonly used chlorides are sodium chloride, zinc chloride, manganese chloride, hexachloroethane, carbon tetrachloride,...

AI Technical Summary

Problems solved by technology

[0007] The above refining agent reacts under high temperature smelting to generate Cl 2 , AlCl 3 、C 2 Cl 4 and other gases, and the above-mentioned refining agent also contains harmful elements such as benzene, which is not only poisonous but also has a strong pungent smell, which is not good for the health of workers and pollutes the environment