JP2013531733A - 溶銑の製造方法及び製造プラント - Google Patents
溶銑の製造方法及び製造プラント Download PDFInfo
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- 239000002184 metal Substances 0.000 title claims abstract description 26
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 12
- 238000000034 method Methods 0.000 claims abstract description 74
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- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims abstract description 6
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- 239000000696 magnetic material Substances 0.000 claims 1
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- 239000006096 absorbing agent Substances 0.000 description 2
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
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- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
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- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
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- 238000002485 combustion reaction Methods 0.000 description 1
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- 239000010419 fine particle Substances 0.000 description 1
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- 230000005484 gravity Effects 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- YDZQQRWRVYGNER-UHFFFAOYSA-N iron;titanium;trihydrate Chemical compound O.O.O.[Ti].[Fe] YDZQQRWRVYGNER-UHFFFAOYSA-N 0.000 description 1
- 238000001465 metallisation Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
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- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
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- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
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- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/52—Manufacture of steel in electric furnaces
- C21C5/527—Charging of the electric furnace
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
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Abstract
【解決手段】本発明は、溶銑の製造に関する。酸化鉄を含む粒状原材料は、流動層反応器において少なくとも850℃の温度で炭素質還元剤によって部分還元されて、還元混合物を得る。場合によっては高温磁気分離による磁性成分と非磁性成分との分離後、排出システムを介して、該還元混合物は、溶融還元ユニットに供給される。エネルギ消費を最適化するため、該溶融還元ユニットに供給される前に、該還元混合物は、熱交換装置において、600〜800℃に冷却される。予備加熱されたプロセスガスは冷却媒体として使用される。
【選択図】図1
Description
u = ガスフローの有効速度[m/s]
ρs = 固体物粒子の密度[kg/m3]
ρf = 流動ガスの有効密度[kg/m3]
dp = リアクタ動作中に存在するリアクタインベントリ(reactor inventory)の粒子(又は形成された粒子)の平均直径[m]
g = 重力定数[m/s2]
・融点より低い温度での直接還元
・溶融前の副生成物の分離
・還元鉱石の溶融ユニットへの高温投入
によって、溶融還元において、省エネルギ化が達成できる。
2…粒状鉄鉱石用貯蔵容器
3…混合タンク
4…第1予備加熱ステージの熱交換器
5…第1予備加熱ステージのサイクロン
6、6´、6´´…固体物シュート
7…第2予備加熱ステージの熱交換器
8…第2予備加熱ステージのサイクロン
9…熱発生器
10…石炭用貯蔵容器
10a…粉砕乾燥装置
11…再循環ガス用ガスダクト
12…連通路
13…流動層反応器
14…流動層反応器のサイクロン
15…固体物戻しシュート
16、16´、16´´…ガスダクト
17a…廃熱ボイラー
17b…サイクロン
17c…スクラバ
18…CO2吸収装置
19…ガスヒータ
20…固体物管路
21…フラッシュ冷却器(熱交換装置)
22…排出シュート
23…フラッシュ冷却器のサイクロン
24…再循環ダクト
25、25´、25´´、25´´´…固体物シュート
26…バッファーホッパー
27…送り容器
28…オーバーフローホッパー
29…分配ホッパー
30…高温磁気分離器
31…溶融還元炉
32…熱間圧縮ユニット
Claims (17)
- 酸化鉄を含む粒状原材料を、流動層反応器において少なくとも850℃の温度で炭素質還元剤によって部分還元して、還元混合物を得る工程と、
前記還元混合物を排出システムを介して溶融還元ユニットに供給する工程と、
を有する溶銑を製造する方法であって、
前記還元混合物を前記溶融還元ユニットに供給する前に、前記還元混合物を熱交換装置において600〜800℃の温度に冷却し、予備加熱されたプロセスガスは冷却媒体として使用されることを特徴とする溶銑を製造する方法。 - 請求項1記載の方法において、前記プロセスガスは、前記流動層反応器から取り出された再循環ガスであることを特徴とする方法。
- 請求項1又は2記載の方法において、前記プロセスガスは、一酸化炭素(CO)及び/又は元素水素(H2)を含有することを特徴とする方法。
- 請求項1〜3のいずれか1項に記載の方法において、前記プロセスガスは、前記熱交換装置に導入される前に300〜500℃に予備加熱されることを特徴とする方法。
- 請求項1〜4のいずれか1項に記載の方法において、前記プロセスガスは、前記熱交換装置において前記還元混合物によって600〜800℃に予備加熱されることを特徴とする方法。
- 請求項1〜5のいずれか1項に記載の方法において、前記熱交換装置に続いて、前記還元混合物は前記加熱されたプロセスガスから分離され、前記加熱されたプロセスガスは前記流動層反応器に、流動ガス又は還元ガスとして供給され、前記還元混合物は前記溶融還元ユニットに供給されることを特徴とする方法。
- 請求項1〜6のいずれか1項に記載の方法において、前記熱交換装置の後且つ前記排出システムの後、前記還元混合物は、非磁性物質を分離する高温磁気分離器に供給されることを特徴とする方法。
- 請求項1〜7のいずれか1項に記載の方法において、前記熱交換装置において、前記還元混合物は、前記排出システム又はそれ以降の装置に必要な高さに搬送されることを特徴とする方法。
- 請求項7又は8記載の方法において、前記高温磁気分離器のフロー温度は、前記予備加熱されたプロセスガスの温度を介して制御されることを特徴とする方法。
- 請求項1〜9のいずれか1項に記載の方法において、前記熱交換装置に続いて設けられた排出システムにおいて、前記流動層反応器及び前記熱交換装置におけるプラント圧は、ライザー及びオーバーフローホッパーを介して完全に減少されることを特徴とする方法。
- 請求項7〜10のいずれか1項に記載の方法において、前記排出システム後の前記還元混合物又は前記高温磁気分離器後の前記高温還元鉱石は、熱間ブリケットユニット又は熱間圧縮ユニットに供給されることを特徴とする方法。
- 鉄鉱石及び還元剤を投入する装置と、
鉄鉱石を部分還元する流動層反応器(13)と、
溶銑を製造する溶融還元ユニット(31)と、
を備えた溶銑を製造するプラントであって、
前記流動層反応器(13)と前記溶融還元ユニット(31)との間に熱交換装置(21)が設けられ、
前記熱交換装置(21)には、前記流動層反応器(13)からの前記還元混合物が供給され、前記熱交換装置(21)には、予備加熱されたプロセスガス用ダクト(11)が接続され、前記熱交換装置(21)には、排出システム(25〜29)を介して前記溶融還元ユニット(31)が接続されることを特徴とする溶銑を製造するプラント。 - 請求項12記載のプラントにおいて、前記熱交換装置(21)はフラッシュ冷却器であることを特徴とするプラント。
- 請求項13記載のプラントにおいて、前記フラッシュ冷却器は環状流動層を有することを特徴とするプラント。
- 請求項12〜14のいずれか1項に記載のプラントにおいて、前記熱交換装置(21)に続いて、前記プロセスガスから前記鉄含有固体物を分離するためのサイクロン(23)が設けられ、再循環ダクト(24)は前記サイクロン(23)から前記流動層反応器(12)へ通じ、固体物シュート(25)は前記サイクロン(23)から前記排出システム(26〜29)に通じることを特徴とするプラント。
- 請求項12〜15のいずれか1項に記載のプラントにおいて、前記排出システム(25〜29)に続いて、高温磁気分離器(30)が設けられることを特徴とするプラント。
- 請求項12〜15のいずれか1項に記載のプラントにおいて、前記排出システム(25〜29)又は前記高温磁気分離器(30)に続いて、熱間ブリケットユニット又は熱間圧縮ユニット(32)が設けられることを特徴とするプラント。
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PCT/EP2011/002498 WO2011151020A1 (en) | 2010-06-04 | 2011-05-19 | Process and plant for producing hot metal |
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EP3153775A1 (en) * | 2015-10-08 | 2017-04-12 | Improbed AB | Method for operating a fluidized bed boiler |
CN105651068B (zh) * | 2015-12-31 | 2019-02-01 | 广东工业大学 | 一种硅矿石熔融发电系统 |
US10434576B2 (en) * | 2016-08-03 | 2019-10-08 | Reid Reactors Llc | Method and apparatus for producing metallic iron from iron oxide fines |
US10661340B2 (en) * | 2016-08-03 | 2020-05-26 | Reid Reactors Llc | Method and apparatus for producing metallic iron from iron oxide fines |
US11097340B2 (en) | 2018-11-19 | 2021-08-24 | Hamilton Sundstrand Corporation | Powder cleaning systems and methods |
SE543341C2 (en) * | 2019-04-01 | 2020-12-08 | Greeniron H2 Ab | Method and device for producing direct reduced metal |
LU500764B1 (en) * | 2021-10-19 | 2023-04-20 | Wurth Paul Sa | Method for reducing carbon footprint in operating a metallurgical plant for producing pig iron |
TW202330941A (zh) * | 2021-10-19 | 2023-08-01 | 盧森堡商保羅伍斯股份有限公司 | 在操作生產生鐵的冶金廠中減少碳足跡的方法 |
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US20070256519A1 (en) * | 2004-05-31 | 2007-11-08 | Outokumpu Technology Oy | Direct Reduction Process and Apparatus |
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ES2526593T3 (es) | 2015-01-13 |
CA2797989C (en) | 2016-08-16 |
EP2576845B1 (en) | 2014-10-08 |
AU2011260632A2 (en) | 2012-12-20 |
UA106530C2 (uk) | 2014-09-10 |
US20130118306A1 (en) | 2013-05-16 |
WO2011151020A8 (en) | 2012-12-20 |
CA2797989A1 (en) | 2011-12-08 |
EA201291252A1 (ru) | 2013-06-28 |
PL2576845T3 (pl) | 2015-03-31 |
KR20130038897A (ko) | 2013-04-18 |
KR101410064B1 (ko) | 2014-06-26 |
AU2011260632B2 (en) | 2015-02-26 |
AU2011260632A1 (en) | 2012-11-29 |
JP5612199B2 (ja) | 2014-10-22 |
BR112012030695A2 (pt) | 2016-09-13 |
NZ603434A (en) | 2013-11-29 |
EA026243B1 (ru) | 2017-03-31 |
WO2011151020A1 (en) | 2011-12-08 |
DE102010022773A1 (de) | 2011-12-08 |
EP2576845A1 (en) | 2013-04-10 |
CN102933726B (zh) | 2015-08-26 |
CN102933726A (zh) | 2013-02-13 |
US8926728B2 (en) | 2015-01-06 |
DE102010022773B4 (de) | 2012-10-04 |
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