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美刊《33金属生产》报道日本NKK公司已改造其福山厂碱性氧气转炉,以生产高质量不锈钢。虽然这个工艺是在熔化阶段用煤代替焦炭去除Ni或Cr矿石中的氧,但是它与目前日本正在研究的直接炼铁的生产并
US publication “33 Metal Production” Report Japan NKK company has transformed its Fukuyama plant alkaline oxygen converter to produce high-quality stainless steel. Although this process uses coal instead of coke to remove oxygen from Ni or Cr ores during the melting phase, it is consistent with the production of direct iron currently under study in Japan