日本三井财团的三井氧化铝、三井铝工业、三井金属矿业三公司共同研究成功的新的碳还原高炉炼铝法,引起了广泛的注意。从75年开始,该公司为了克服电力成本激增的困难,着手研究节能的新炼铝法,81年取得了专利权。82年投资7000万日元,在日本北九州市三井氧化铝公 Japan’s Mitsui Foundation’s Mitsui alumina, Mitsui aluminum industry, Mitsui metal mining company jointly study the success of the new carbon reduction blast furnace aluminum production method, attracted widespread attention. From the beginning of the 75th, in order to overcome the difficulty of surging electricity costs, the company started to study the new energy-saving aluminum refining method and obtained the patent right in 1981. 82 years investment 70 million yen, Mitsui alumina company in Kitakyushu, Japan