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Copper Elimination from the Molten Steel by Addition of Hydronitrogens

International Journal of Minerals,Metallurgy and Materials 1998年第2期12卷 93-96页

作者： liansheng li~(1)) changxiang xiang~(1)) jie cao~(1)) shiqi ii~(1)) eiji ichise~(2)) 1)Applied Science School, UST Beijing, Beijing 100083, China 2) The kyoto university, kyoto, japan Applied Science School UST Beijing Beijing 100083 China kyoto university Kyoto Japan

A novel method has been proposed to remove copper from molten steel by adding the compounds of hydrogen and nitrogen into the melt at normal pressure. Feasibility experiments were carried out in Mo-wire resistance furnace at 1600℃. The copper content of about 400 g 45 steel were reduced from 0.60% and 0.57% to 0.41% and 0.51% with 3.25g and 1.20 g NH_4Cl respectively, while the copper contents of about 300 g steel melt were reduced from 1.15% and 0.61% to 0.90% and 0.56% with 4.10 g and 2.00 g NH_2CONH_2. These results indicate that the proposed method is very promising to be put into practical and worthwhile of further study.

关键词： molten steel copper removal hydronitrogens

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Copper Removal from Molten Steel by Gasification

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Journal of Iron and Steel Research International 1999年第2期6卷 10-13页

作者： li liansheng li shiqi xiang changxiang cao jie liu Keming li Suqin university of Science and Technology Beijing

A novel method is proposed to enhance the gasification and removal of copper from molten steel by adding ammonium salts or urea into molten steel under normal *** decopperization experiments were conducted in a molybdenum-wire resistance furnace at 1 873 *** copper content of about 400 g of a mild steel was reduced from 0.49%(mass fraction,the same below) and 0.51% to 0.31% and 0.38% using 0.7 g of NHC1 and 0.5 g of(NH)COrespectively,while the copper content of the molten steel was reduced from 0.61%to 0.56% using 2.00 g of NHCONH.

关键词： molten steel copper removal ammonium salt

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