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1991年全世界用各种工艺生产的直接还原铁和热压铁块总产量为19.41×10~6t,与1990年相比提高了8％。其中用Hy1工艺生产的直接还原铁5395095t见下表。
In 1991, the total output of directly reduced iron and autoclaved iron produced by various processes in the world was 19.41 × 10 ~ 6t, an increase of 8% compared with 1990. Among them, the direct reduction iron 5395095t produced by Hy1 process is shown in the following table.