The invention relates to a deep clean
smelting process for preparing high-purity aluminum, and aims to improve the purity of molten aluminum through multi-step purification and refining treatment. The process comprises the key steps of aluminum
ingot selection and pretreatment,
smelting, refining, degassing, filtering, stirring,
casting and the like. According to the method, coarse
slag inclusion is removed by adopting an immersed closed structure, a high-purity
graphite crucible is used, high-purity
argon is introduced for protection, and a mixed refining agent of AlCl3 and NaCl is used for refining for multiple times, so that the content of impurities in molten
aluminum can be remarkably reduced. And further, through
ceramic filtration, rotary jet degassing and
electromagnetic stirring, it is ensured that molten aluminum components are uniform and clean. The final product is smooth and flawless in surface after being polished and ultrasonically cleaned, and is suitable for the high-tech field with strict requirements on material purity. The process is simple and efficient, the preparation quality of the high-purity
aluminum can be greatly improved, and the method has wide application prospects.