基本信息:
- 专利标题： PROCESS FOR DECARBURIZING HIGH-Cr MOLTEN PIG IRON
- 专利标题（中）：法脱碳高铬铁。
- 申请号：EP88907784.8 申请日：1988-09-09
- 公开(公告)号：EP0331751B1 公开(公告)日：1994-03-16
- 发明人： TANABE, Haruyoshi NKK Corporation-nai , KAWAKAMI, Masahiro NKK Corporation-nai , TAKAHASHI, Kenji NKK Corporation-nai , IWASAKI, Katsuhiro NKK Corporation-nai , INOUE, Shigeru NKK Corporation-nai
- 申请人： NKK CORPORATION
- 申请人地址： 1-2, Marunouchi 1-chome Chiyoda-ku Tokyo 100 JP
- 专利权人： NKK CORPORATION
- 当前专利权人： JFE ENGINEERING CORPORATION
- 当前专利权人地址： JFE ENGINEERING CORPORATION
- 代理机构： Klingseisen, Franz, Dipl.-Ing.
- 优先权： JP224048/87 19870909; JP231042/87 19870917; JP285444/87 19871113; JP330979/87 19871226
- 国际公布： WO8902479 19890323
- 主分类号： C21C5/28
- IPC分类号： C21C5/28 ; C21C5/30 ; C21B11/00 ; C21B13/00
摘要：
A process for decarburizing high-Cr molten pig iron under atmospheric pressure in a short time with minimized Cr loss due to oxidation is disclosed. A fundamental feature of the process comprises top-blowing decarburizing O2 diluted with an inert gas through a top-blowing lance against high-Cr molten pig iron in a vessel and at the same time blowing an inert gas through a bottom-blowing tuyere to vigorously stir the molten pig iron. Another feature of the process comprises controlling a slag amount in the above-described decarburizing blowing to thereby depress Cr loss due to oxidation. A further feature comprises conducting a predetermined denitrification after the blowing to thereby economically produce low-nitrogen molten iron with depressed Cr loss due to oxidation.
公开/授权文献:
- EP0331751A1 PROCESS FOR DECARBURIZING HIGH-Cr MOLTEN PIG IRON 公开/授权日：1989-09-13
IPC结构图谱:
| C | 化学；冶金 |
| --C21 | 铁的冶金 |
| ----C21C | 生铁的加工处理，例如精炼、熟铁或钢的冶炼；熔融态下铁类合金的处理 |
| ------C21C5/00 | 碳钢的冶炼，例如普通低碳钢，中碳钢，或铸钢 |
| --------C21C5/28 | .转炉炼钢 |