Refining agent and smelting technology of fusion casting aluminum bar for aluminum profile

The invention discloses a refining agent and smelting technology of a fusion casting aluminum bar for an aluminum profile. The refining agent comprises, by mass, 30%-65% of NaCl, 15%-30% of Na2SiF6, 10%-25% of B4C and 5%-20% of NaSO4. The refining agent is simple in component, the refining agent is high in grain refining effect, good in impurity removal effect and high in degassing capacity when the refining agent is applied to an aluminum alloy smelting technology, the obtained aluminum bar is excellent in performance, and the refining agent is suitable for industrial popularization. 本发明公开了-种铝型材用熔铸铝棒的精炼剂及熔炼工艺，所述按质量比由如下组分组成：NaCl 30-65％、Na2SiF615-30％、B4C 10-25％及NaSO45-20％；采用本发明提供的精炼剂组分简单，应用于铝合金熔炼工艺中晶粒细化作用强，除杂效果好，除气能力强，获得的铝棒性能优异，适用于工业化推广。