基本信息:
- 专利标题： 一种超低磷钢的冶炼方法
- 专利标题（英）：Smelting method of ultra-low phosphorus steel
- 申请号：CN201610706098.1 申请日：2016-08-23
- 公开(公告)号：CN106282477A 公开(公告)日：2017-01-04
- 发明人： 李朋 , 李阳 , 周泉林 , 王肖 , 周航 , 邢金栋 , 刘海波 , 史慧艳 , 杜传鹏 , 张玉秀 , 李梦英 , 杨杰 , 张红娟
- 申请人： 唐山不锈钢有限责任公司 , 唐山钢铁集团有限责任公司
- 申请人地址： 河北省唐山市古冶区唐家庄
- 专利权人： 唐山不锈钢有限责任公司,唐山钢铁集团有限责任公司
- 当前专利权人： 唐山不锈钢有限责任公司,唐山钢铁集团有限责任公司
- 当前专利权人地址： 河北省唐山市古冶区唐家庄
- 代理机构： 石家庄冀科专利商标事务所有限公司
- 代理人： 陈丽
- 主分类号： C21C5/30
- IPC分类号： C21C5/30 ; C21C7/064
The invention discloses a smelting method of ultra-low phosphorus steel. The smelting method comprises the following steps: (1) in-furnace molten iron: 4.0-4.6% of C, 0.35-0.75% of Si, 0.11-0.14% of P and 0.05-0.1% of Ti; (2) primary blowing: in carbon catching, the C accounts for 0.05-0.07%, the temperature is 1,600-1,640 DEG C, and the P content at the end point is less than or equal to 0.012%; (3) charging and supplementary blowing: the target temperature of supplementary blowing is 1,650-1,690 DEG C, a slagging material is added again for slagging, and the P content at the end point is less than or equal to 0.004%; and (4) tapping. According to the invention, the primary blowing is effectively combined with the supplementary blowing; through the ways such as supplementary blowing, bottom stirring during standing, deslagging and phosphorus removal and double reduction of rephosphorization amount during tapping, the best phosphorus removal effect is guaranteed; and moreover, the limit on equipment level is broken, the smelting can be finished simply in a converter single process, and the phosphorus removal efficiency exceeds 96%.
公开/授权文献:
- CN106282477B 一种超低磷钢的冶炼方法 公开/授权日：2018-06-19
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 |
| ----------C21C5/30 | ..吹炼的调节或控制 |