我国许多特钢企业按“三位一体”、“四个一”流程的配置，建成了新的生产线。“三位一体”即以“连铸为中心”，开发“电炉一精炼一连铸”；“四个一流程”，即由一台大型电炉、一套炉外精炼装置、一台连铸机和一套连轧机组成一条生产线，在节能、降耗、降低成本、提高劳动生? Many special steel enterprises in our country have built new production lines according to the configuration of “Trinity” and “Four One” processes. “Trinity” means “continuous casting as the center”, developing “electric furnace one refining one continuous casting”; “four first steps”, namely a large electric furnace, a set of furnace refining equipment, a continuous casting machine and a Set with a rolling mill sets of production lines, saving energy, reducing consumption, reduce costs and improve labor?