JP2019119906A - 転炉精錬方法 - Google Patents
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
Description
前記脱珪、脱燐および脱炭の各処理に当たり、工業用酸素ガスとCaOを含む粉粒体からなる媒溶材を、バーナー機能を備える上吹きランスを用いて前記CaOを含む粉粒体からなる前記媒溶材を加熱して熱媒体とし、溶銑あるいは溶鋼の浴面に吹き付けることにより、前記脱珪、脱燐および脱炭の各処理スラグを加熱することを特徴とする転炉精錬方法にある。
(イ)天然ガスの供給は行なわず、精錬用酸素ガスとCaO粉だけを吹き付けた場合、
(ロ)CaO粉の吹き付けは行なわず、精錬用酸素ガスと天然ガスだけを吹き付けた場合、
(ハ)精錬用酸素ガス、天然ガスおよびCaO粉の全てを吹き付けた場合、
の3水準について比較調査した。
以下、上述した本発明例及び比較例における操業条件と操業結果を下記表4に示す。
このように、本発明方法を適用した精錬を行なうことで、鉄歩留を向上させると同時にCaO原単位を低減させる転炉の操業が可能となることが確認できた。
2 転炉(本体)
3 上吹きランス
4 底吹き羽口
5 溶銑
6 酸素ガス噴流
7 CaO粉噴流
8 酸素ガス供給管
9 粉体搬送管
10 燃料ガス供給管
11 冷却水供給管
12 冷却水排出管
Claims (2)
- 同一の転炉によって溶銑の脱珪処理、脱燐処理および脱炭処理を行なって溶鋼を製造する転炉精錬方法において、まず、転炉内にスクラップと溶銑とを装入してから、上吹きランスから工業用酸素ガスとCaOを含む粉粒体からなる媒溶材を溶銑浴面に吹き付けて行なう前記脱珪処理に当たり、工業用酸素ガスとCaOを含む粉粒体からなる媒溶材とを、バーナー機能を備える上吹きランスを用いて該媒溶材を加熱して熱媒体とし、溶銑あるいは溶鋼の浴面に吹き付けることにより、脱珪処理スラグを加熱してこれを中間排滓処理することを特徴とする転炉精錬方法。
- 同一の転炉によって溶銑の脱珪処理、脱燐処理および脱炭処理を行なって溶鋼を製造するに際し、まず、転炉内にスクラップと溶銑とを装入して、上吹きランスから工業用酸素ガスとCaOを含む粉粒体からなる媒溶材を該溶銑浴面に吹き付けて溶銑の脱珪処理を行ない、次に、脱珪処理後のスラグの一部を炉外へ排出する一方、炉内を脱珪処理済み溶銑と脱珪処理後スラグの残留分とからなるものにする中間排滓処理を行ない、次に、脱珪処理済み溶銑に対して上吹きランスから精錬用酸素ガスとともにCaOを含む粉粒体からなる媒溶材を吹き付けて溶銑の脱燐、脱炭処理を行ない、次いで、炉内に残留する脱燐、脱炭処理後の溶鋼を溶鋼鍋に出鋼する一方、炉内に残留する脱燐、脱炭処理後スラグの一部もしくは全部を炉外へ排出して溶鋼を製造する転炉精錬方法において、
前記脱珪、脱燐および脱炭の各処理に当たり、工業用酸素ガスとCaOを含む粉粒体からなる媒溶材を、バーナー機能を備える上吹きランスを用いて前記CaOを含む粉粒体からなる前記媒溶材を加熱して熱媒体とし、溶銑あるいは溶鋼の浴面に吹き付けることにより、前記脱珪、脱燐および脱炭の各処理スラグを加熱することを特徴とする転炉精錬方法。
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112577322A (zh) * | 2020-12-11 | 2021-03-30 | 交城义望铁合金有限责任公司 | 一种用于水冷炉盖的加料搅拌装置 |
WO2022163156A1 (ja) | 2021-02-01 | 2022-08-04 | Jfeスチール株式会社 | 溶鉄の精錬方法およびそれを用いた溶鋼の製造方法 |
KR20230136164A (ko) | 2021-02-01 | 2023-09-26 | 제이에프이 스틸 가부시키가이샤 | 용철의 정련 방법 및 그것을 이용한 용강의 제조 방법 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH05140627A (ja) * | 1991-11-16 | 1993-06-08 | Nippon Steel Corp | 転炉製鋼法 |
JP2013163828A (ja) * | 2012-02-09 | 2013-08-22 | Jfe Steel Corp | 溶鋼の製造方法 |
WO2014112432A1 (ja) * | 2013-01-18 | 2014-07-24 | Jfeスチール株式会社 | 転炉製鋼法 |
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- 2017-12-28 JP JP2017254489A patent/JP6828678B2/ja active Active
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH05140627A (ja) * | 1991-11-16 | 1993-06-08 | Nippon Steel Corp | 転炉製鋼法 |
JP2013163828A (ja) * | 2012-02-09 | 2013-08-22 | Jfe Steel Corp | 溶鋼の製造方法 |
WO2014112432A1 (ja) * | 2013-01-18 | 2014-07-24 | Jfeスチール株式会社 | 転炉製鋼法 |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112577322A (zh) * | 2020-12-11 | 2021-03-30 | 交城义望铁合金有限责任公司 | 一种用于水冷炉盖的加料搅拌装置 |
CN112577322B (zh) * | 2020-12-11 | 2022-12-06 | 交城义望铁合金有限责任公司 | 一种用于水冷炉盖的加料搅拌装置 |
WO2022163156A1 (ja) | 2021-02-01 | 2022-08-04 | Jfeスチール株式会社 | 溶鉄の精錬方法およびそれを用いた溶鋼の製造方法 |
KR20230136164A (ko) | 2021-02-01 | 2023-09-26 | 제이에프이 스틸 가부시키가이샤 | 용철의 정련 방법 및 그것을 이용한 용강의 제조 방법 |
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