基本信息:
- 专利标题： LANCE NOZZLE
- 申请号：EP20786715.1 申请日：2020-04-02
- 公开(公告)号：EP3954789A1 公开(公告)日：2022-02-16
- 发明人： MURAKAMI, Yumi , ODA, Nobuhiko , FUJII, Yusuke , OKUYAMA, Goro , AMANO, Shota , KOSEKI, Shinji , SATO, Shingo , TAKAHASHI, Yukio , KAWABATA, Ryo , KIKUCHI, Naoki , YUASA, Atsuo
- 申请人： JFE Steel Corporation
- 申请人地址： JP Tokyo 100-0011 2-3, Uchisaiwai-cho 2-chome Chiyoda-ku
- 代理机构： Hoffmann Eitle
- 优先权： JP2019074289 20190409
- 国际公布： WO2020209173 20201015
- 主分类号： C21C5/46
- IPC分类号： C21C5/46 ; C21C7/072
摘要：
Provided is a top-blowing lance nozzle configured to freely switch an adequate expansion condition so as to control an oxygen-blowing amount and a jetting velocity independently of each other without requiring a plurality of lance nozzles or a mechanically movable part. A lance nozzle 1 is configured to blow refining oxygen to molten iron charged in a reaction vessel while a gas is blown from a top-blowing lance to the molten iron. One or more blowing holes 4 for blowing a working gas are provided, on an inner wall side surface of the nozzle, at a site where the lance nozzle has a minimum cross-sectional area in a nozzle axis direction or at a neighboring site of the site.
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 |
| --------C21C5/04 | .平炉钢，例如西门子—马丁炉钢的冶炼 |
| ----------C21C5/38 | ..废气或烟尘的去除 |
| ------------C21C5/46 | ...零件或辅助设备 |