JP5555921B2 - 電気炉の操業方法 - Google Patents
電気炉の操業方法 Download PDFInfo
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- JP5555921B2 JP5555921B2 JP2011133077A JP2011133077A JP5555921B2 JP 5555921 B2 JP5555921 B2 JP 5555921B2 JP 2011133077 A JP2011133077 A JP 2011133077A JP 2011133077 A JP2011133077 A JP 2011133077A JP 5555921 B2 JP5555921 B2 JP 5555921B2
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- slag
- electric furnace
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- 238000000034 method Methods 0.000 title claims description 54
- 239000002893 slag Substances 0.000 claims description 199
- 239000000203 mixture Substances 0.000 claims description 39
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 19
- 239000002184 metal Substances 0.000 claims description 17
- 229910052751 metal Inorganic materials 0.000 claims description 17
- 238000011017 operating method Methods 0.000 claims description 9
- 229910052742 iron Inorganic materials 0.000 claims description 7
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims description 5
- 239000003638 chemical reducing agent Substances 0.000 claims description 5
- 230000003247 decreasing effect Effects 0.000 claims description 2
- 239000010410 layer Substances 0.000 description 27
- 238000002844 melting Methods 0.000 description 13
- 230000008018 melting Effects 0.000 description 13
- 238000003723 Smelting Methods 0.000 description 8
- 229910000863 Ferronickel Inorganic materials 0.000 description 7
- 239000011247 coating layer Substances 0.000 description 7
- 239000002994 raw material Substances 0.000 description 5
- 238000000605 extraction Methods 0.000 description 4
- 230000002829 reductive effect Effects 0.000 description 4
- 239000003245 coal Substances 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 230000007774 longterm Effects 0.000 description 3
- 230000007704 transition Effects 0.000 description 3
- 229910004298 SiO 2 Inorganic materials 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 239000000571 coke Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 238000010079 rubber tapping Methods 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- -1 ferrous metals Chemical class 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000004071 soot Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 230000003442 weekly effect Effects 0.000 description 1
Images
Classifications
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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
-
- 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
- Y02P10/25—Process efficiency
Landscapes
- Discharge Heating (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Description
(1)電極をスラグ層まで浸漬させて、電極からメタル及びスラグに直接通電させ、抵抗発熱によりスラグを介して間接的に鉱石を熔解させる方法(高電流低電圧操業方法)。
(2)スラグ層と電極にある程度の距離を設けて、電極からアークを発生させ、アークの熱により直接的に鉱石を熔解させる方法(低電流高電圧操業方法)。
電気炉の水平断面の直径が17.5m、高さが6.0m、日間電力量で700〜850MWh/日、電極は3本、交流電源のトランス容量を65MVA、平均的なメタル出銑量は約150〜250ton/日、スラグ出滓量は約1000〜1400ton/日で操業を行った。
比較例1では、実施例1と同様の操業条件で操業を行うに際して、特許文献1に記載の技術と同様に、スラグ炉抵抗により電流を調整して制御する操業方法を行った。その際、スラグ浴抵抗を算出するためにスラグ層の値を測定した。
Claims (5)
- 電気炉内に垂下した3本の電極に三相交流を印加して通電する電気炉の操業方法において、
前記電気炉内で生成するスラグの組成を定期的に測定し、測定した該スラグのスラグ塩基度、Fe(質量%)、Al 2 O 3 (質量%)の組成に応じて3相交流電流を印加して、
3本の電極をスラグ層まで浸漬させ、電極からメタル及びスラグに直接通電させて抵抗発熱する方法、
又は、3本の電極をスラグ層に対し距離を設けて、電極からアークを発生させてアークの熱により直接的に鉱石を熔解させる方法
を使い分けることにより、電気炉内の該スラグの流動性を調整することを特徴とする電気炉の操業方法。 - 前記スラグの組成に応じて前記電極を段階的に昇降させ、該電極の先端をスラグに浸漬又は該電極の先端とスラグとの距離を離間させることを特徴とする請求項1記載の電気炉の操業方法。
- スラグ組成に応じてスラグの流動性が悪化していると判断した場合には、電極の降下による電流制御に加え、還元剤を添加してスラグ中に含まれる鉄品位を下げることを特徴とする請求項1又は2のいずれか1つに記載の電気炉の操業方法。
- スラグ塩基度に応じて前記電極を昇降させることを特徴とする請求項1又は2記載の電気炉の操業方法。
- 前記スラグ塩基度が上昇した場合には、前記電極を降下させて前記スラグに対して通電させる電流を高くし、前記スラグ塩基度が低下した場合には、前記電極を上昇させて前記スラグに対して通電させる電流を低くするように制御することを特徴とする請求項4記載の電気炉の操業方法。
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JP2013001938A JP2013001938A (ja) | 2013-01-07 |
JP5555921B2 true JP5555921B2 (ja) | 2014-07-23 |
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JP5984143B2 (ja) * | 2013-06-25 | 2016-09-06 | 株式会社日向製錬所 | 電気炉の操業方法及びその電気炉 |
CN105018855B (zh) * | 2015-01-09 | 2017-02-01 | 达力普石油专用管有限公司 | 一种油气集输用抗硫管线钢圆坯的生产方法 |
JP7321776B2 (ja) * | 2019-05-28 | 2023-08-07 | 株式会社日向製錬所 | フェロニッケル鋳造片の黒色化抑制方法、及び、フェロニッケル鋳造片の製造方法 |
CN115505680B (zh) * | 2022-09-30 | 2024-02-27 | 安徽工业大学 | 一种用于sphc钢的lf精炼方法 |
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JPS58199843A (ja) * | 1982-05-06 | 1983-11-21 | ゴスダルストウエンヌイ・プロエクトヌイ・イ・ナウチノ−イスレドワ−チエルスキ−・インスチツ−ト・ニケレボ−コバルトボイ・イ・オロウイアンノイ・プロムイシユレンノスチ | 鉱石製錬用電気炉中で装入物層の下で行なうフエロニツケル製錬法 |
JP4136521B2 (ja) * | 2002-08-01 | 2008-08-20 | 株式会社日向製錬所 | フェロニッケル製錬用電気炉の操業方法 |
JP5408417B2 (ja) * | 2009-07-07 | 2014-02-05 | 株式会社日向製錬所 | フェロニッケル製錬用電気炉の操業方法 |
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