Process Characteristics of a Commercial-scale Oxygen Blast Furnace Process with Shaft Gas Injection.
-
- Ohno Yotaro
- Planning and Coordination Dept., NKK Corporation
-
- Matsuura Masahiro
- Steel Research Center, NKK Corporation
-
- Mitsufuji Hiroyuki
- Steel Division, Fukuyama Works, NKK Corporation
-
- Furukawa Takeshi
- Steel Research Center, NKK Corporation
抄録
A new oxygen blast furnace process, which is characterized by the injection of preheating gas into the shaft, was developed. For the development of the process, operation tests using an experimental blast furnace were carried out, and proved this process to be applicable as an ironmaking process. Mathematical model simulations were also carried out and the process characteristics were clarified on a commercial scale, in comparison with those of a conventional hot blast furnace process.<br>Through the analysis of the experimental blast furnace operation and the mathematical model simulations, this process was found to have the following characteristics;<br>(1) Heating-up and reduction of burden assured throughout the furnace by means of the preheating gas injection.<br>(2) Appropriate preheating gas, in which the low fuel rate is realized, is the range of preheating gas flow rates corresponding to thermal flow ratio in the upper part of 0.74-0.90 and the range of temperatures 600-1200°C.<br>(3) The preheating gas composition has little influence on the reduction in the lower part.<br>(4) The position of preheating gas injection is adequate in the upper shaft as long as the heat transfer is secured.<br>(5) Operational fuel rate range is wide; 500 kg/t (with preheating gas)-1200 kg/t (without preheating gas).
収録刊行物
-
- ISIJ International
-
ISIJ International 32 (7), 838-847, 1992
一般社団法人 日本鉄鋼協会
- Tweet
キーワード
詳細情報 詳細情報について
-
- CRID
- 1390001206452728832
-
- NII論文ID
- 130000763189
-
- COI
- 1:CAS:528:DyaK38XlslGntLY%3D
-
- ISSN
- 13475460
- 09151559
- http://id.crossref.org/issn/00211583
-
- 本文言語コード
- en
-
- データソース種別
-
- JaLC
- Crossref
- CiNii Articles
-
- 抄録ライセンスフラグ
- 使用不可