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日本住友金属工业公司小仓厂最近投产了一台新的大方坯连铸机.投产这台年产量60万t、耗资70亿日元连铸机的目的在于使小仓厂实现1O0%连铸.在该连铸机的设计中,特别注意保证全自动的双流连铸机铸坯清洁度的最佳化.钢水从70t的钢包到中间包,采取了保护措施,以防止钢水二次氧化.封闭的中间包钢水容量27t、深度为880mm,确保在浇注前中间包钢水中的非金属夹杂物有充足的时间上浮.除此以外,中间包还应用感应加热器,提高钢的清洁度.感应加热器提高和稳定中间包钢水温度的准确性达±3℃.连铸结晶器配备了一个沿纵向作用的电机式电磁搅拌器,截面为300×400mm,结晶器垂直段2.2m长,以防止铸坯中夹杂物的聚积.紧接结晶器的是5点弯曲区,这是根据最新发展的理论设计的.在该理论中,5点的各点浇注半径设计成将钢的弯曲应变控制在凝固点,以防止铸坯中内部裂纹的形成.
Japan’s Sumitomo Metal Industries Co., Ltd. Ogura Plant recently put into operation a new bloom caster, put into operation this annual output of 600,000 t, costing 70 billion yen caster aims to make Ogura plant 1O0% continuous casting. In the design of the caster, special care is taken to ensure the optimization of the cleanliness of the fully automatic twin-strand caster slab. The molten steel is protected from secondary ladle of 70 t to tundish to prevent secondary oxidation of the molten steel. The tundish has a capacity of 27 tons of molten steel and a depth of 880 mm, ensuring sufficient time for non-metallic inclusions in the tundish to melt before casting. In addition, the tundish also uses induction heaters to improve the cleanliness of the steel. Heater to improve and stabilize the tundish molten steel temperature accuracy of ± 3 ° C. Continuous casting mold is equipped with a longitudinal role of the electromagnetic stirrer, section 300 × 400mm, mold vertical section 2.2m long to Prevent the accumulation of inclusions in the slab Immediately after the mold is a 5-point bend, which is based on the latest development of the theory designed in this theory, the 5 points of the casting radius is designed to control the steel bending strain At the freezing point, to prevent internal cracks in the slab Formation.