JP7055082B2 - 高炉の操業方法 - Google Patents
高炉の操業方法 Download PDFInfo
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- JP7055082B2 JP7055082B2 JP2018172523A JP2018172523A JP7055082B2 JP 7055082 B2 JP7055082 B2 JP 7055082B2 JP 2018172523 A JP2018172523 A JP 2018172523A JP 2018172523 A JP2018172523 A JP 2018172523A JP 7055082 B2 JP7055082 B2 JP 7055082B2
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- gas
- blast furnace
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- reducing gas
- carbon
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- 239000007789 gas Substances 0.000 claims description 123
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 62
- 229910052799 carbon Inorganic materials 0.000 claims description 40
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 35
- 239000002994 raw material Substances 0.000 claims description 31
- 229910052742 iron Inorganic materials 0.000 claims description 30
- 239000000571 coke Substances 0.000 claims description 27
- 238000000034 method Methods 0.000 claims description 22
- 229910052739 hydrogen Inorganic materials 0.000 claims description 13
- 239000001257 hydrogen Substances 0.000 claims description 12
- 239000000203 mixture Substances 0.000 claims description 10
- 238000007664 blowing Methods 0.000 claims description 8
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims description 4
- 125000004432 carbon atom Chemical group C* 0.000 claims description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 37
- 238000006722 reduction reaction Methods 0.000 description 23
- 239000003638 chemical reducing agent Substances 0.000 description 22
- 230000009467 reduction Effects 0.000 description 16
- 229910052751 metal Inorganic materials 0.000 description 14
- 239000002184 metal Substances 0.000 description 14
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 14
- 239000003245 coal Substances 0.000 description 13
- 238000006243 chemical reaction Methods 0.000 description 11
- 239000000463 material Substances 0.000 description 9
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 8
- 239000001301 oxygen Substances 0.000 description 8
- 229910052760 oxygen Inorganic materials 0.000 description 8
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 6
- 239000003345 natural gas Substances 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000004088 simulation Methods 0.000 description 4
- 239000004215 Carbon black (E152) Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 3
- 238000000354 decomposition reaction Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 229930195733 hydrocarbon Natural products 0.000 description 3
- 150000002430 hydrocarbons Chemical class 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 229910000805 Pig iron Inorganic materials 0.000 description 2
- 229910002091 carbon monoxide Inorganic materials 0.000 description 2
- 239000003610 charcoal Substances 0.000 description 2
- 239000003915 liquefied petroleum gas Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000013178 mathematical model Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 150000001721 carbon Chemical group 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 239000002801 charged material Substances 0.000 description 1
- 238000005094 computer simulation Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 239000005431 greenhouse gas Substances 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- -1 sinter Chemical compound 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
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Description
まず、本実施形態に係る高炉の操業方法について説明する。本実施形態に係る高炉の操業方法では、高炉の炉頂から鉄系原料及びコークスを高炉内に交互かつ層状に装入する一方で、高炉に設けられた羽口から熱風とともに還元ガスを高炉内に吹き込む工程を含む。
(0.065+0.025+0.292+0.02×2+0.008×2)/(0.535×2+0.292×4+0.02×4+0.008×6)=0.185
高炉操業シミュレーションには、Kouji TAKATANI、Takanobu INADA、Yutaka UJISAWA、「Three-dimensional Dynamic Simulator for Blast Furnace」、ISIJ International、Vol.39(1999)、No.1、p.15-22などに示される、所謂「高炉数学モデル」を用いた。この高炉数学モデルは、概略的には、高炉の内部領域を高さ方向、径方向、周方向に分割することで複数のメッシュ(小領域)を規定し、各メッシュの挙動をシミュレーションするものである。計算条件を表2に示す。鉄系原料はすべて焼結鉱とした。また、焼結鉱の組成はT-Fe:58.5%、FeO:7.5%、C/S:1.9、Al2O3:1.7%とした。また、コークスについては、C:87.2%、Ash:12.6%を使用する場合を想定した(%はいずれも質量%を表す)
Input C(kg/t)=コークス比(kg/t)×コークス中の炭素割合(質量%)+微粉炭比(kg/t)×微粉炭中の炭素割合(質量%)+還元ガス使用量原単位(Nm3/t)×還元ガス中の炭素割合(kg/Nm3)
例えば、表1に示した組成のCOGに含まれる炭素割合(kg/Nm3)は以下の数式で計算できる。
(0.065+0.025+0.292+0.02×2+0.008×2)/22.4×12=0.234(kg/Nm3)
Input ΔC=(A-B)/A×100(%)
Claims (3)
- 高炉の炉頂から高炉用鉄系原料及びコークスを前記高炉内に交互かつ層状に装入する一方で、前記高炉に設けられた羽口から熱風とともに還元ガスを前記高炉内に吹き込む工程を含み、
前記還元ガスに含まれる炭素原子と水素原子とのモル比C/Hが0.02~0.13であることを特徴とする、高炉の操業方法。 - 前記還元ガスのC/Hが0.05~0.10であることを特徴とする、請求項1記載の高炉の操業方法。
- 前記還元ガスは、コークス炉ガスに水素を混合したものであることを特徴とする、請求項1または2に記載の高炉の操業方法。
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Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2015199984A (ja) | 2014-04-08 | 2015-11-12 | 新日鐵住金株式会社 | 高炉の操業方法 |
JP2016037624A (ja) | 2014-08-06 | 2016-03-22 | 新日鐵住金株式会社 | 高炉へのガス供給装置及び方法 |
JP2016050345A (ja) | 2014-08-29 | 2016-04-11 | 新日鐵住金株式会社 | 高炉シャフト部供給水素ガスの製造方法および装置 |
JP2016113677A (ja) | 2014-12-16 | 2016-06-23 | 新日鐵住金株式会社 | 高炉の操業方法 |
JP2017172026A (ja) | 2016-03-25 | 2017-09-28 | 新日鐵住金株式会社 | 高炉シャフト部への水素含有還元ガス供給方法 |
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Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2015199984A (ja) | 2014-04-08 | 2015-11-12 | 新日鐵住金株式会社 | 高炉の操業方法 |
JP2016037624A (ja) | 2014-08-06 | 2016-03-22 | 新日鐵住金株式会社 | 高炉へのガス供給装置及び方法 |
JP2016050345A (ja) | 2014-08-29 | 2016-04-11 | 新日鐵住金株式会社 | 高炉シャフト部供給水素ガスの製造方法および装置 |
JP2016113677A (ja) | 2014-12-16 | 2016-06-23 | 新日鐵住金株式会社 | 高炉の操業方法 |
JP2017172026A (ja) | 2016-03-25 | 2017-09-28 | 新日鐵住金株式会社 | 高炉シャフト部への水素含有還元ガス供給方法 |
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