- 著者
- 姉崎 正治 山本 高郁 三好 恵真子
- 出版者
- 廃棄物資源循環学会
- 雑誌
- 廃棄物資源循環学会誌 = Material cycles and waste management research (ISSN:18835864)
- 巻号頁・発行日
- vol.25, no.6, pp.445-453, 2014
- 著者
- 宇治澤 優 中野 薫 松倉 良徳 砂原 公平 小松 周作 山本 高郁
- 出版者
- 社団法人日本鉄鋼協会
- 雑誌
- 鐵と鋼 : 日本鐡鋼協會々誌 (ISSN:00211575)
- 巻号頁・発行日
- vol.92, no.12, pp.1015-1021, 2006-12-01
The technology which reduces the reducing agent rate by the improvement in the reaction efficiency of blast furnace leads to reduction of hot metal manufacturing cost, but also solution of recent CO_2 emission reduction. The subjects for achievement of the blast furnace operation with low reducing agent rate were described on reduction measures of the carbon consumption and problem of the measures referring to the example of reducing agent rate of the present state blast furnace concerning blast operation and reactive improvement. And, carried out concrete measures were introduced in order to aim at the low reducing agent rate operation. The following results were obtained. 1) Since it has reached the already high reaction efficiency in present state blast furnace, it is not easy to attempt further reduction of the reducing agent rate. 2) The blast furnace use of high reactivity coke or reduced iron is equal level or over it in comparison with the reduction effect by the assumed blast operation in this paper. 3) The promotion of coke reaction load with the gasification is worried, when it aims at the low reducing agent rate operation by the high reactivity coke use. 4) It is estimated that the threshold also exists for the reducibility of competing ore, when it aims at the low reducing agent rate operation using the high reactivity coke. 5) The use of the low SiO_2 sinter is effective for the improvement on the permeability in the blast furnace, when it aims at the low fuel rate operation. However, the new technology of the permeability improvement is desired, since there is some a limit for low SiO_2 of the sintered ore, when future raw material supply and demand is considered.
1 0 0 0 OA 鉄鋼製造プロセスを利用したレアメタルの分離回収
溶銑中V溶解度の温度依存性、高炉スラグ/溶銑間V分配比から、鉄鉱石中のVは炭化物を析出せずに溶銑に移行することがわかった。溶銑予備処理および転炉工程でV及びNbが含FeOスラグ中に取り込まれることを見出した。このスラグの冷却凝固過程でV はCalcium silicate相およびCaO-FeO-Al_2O_3相に、NbはCaO-FeO-Al_2O_3相に、PはCalcium silicate相にそれぞれ濃縮したことから、これらの鉱物相を分離することによって、高濃度のV、Nb、Pを含む鉱石代替品とすることが可能であった。