JP7636938B2 - 焼結鉱の製造方法および粉化抑制方法 - Google Patents
焼結鉱の製造方法および粉化抑制方法 Download PDFInfo
- Publication number
- JP7636938B2 JP7636938B2 JP2021060166A JP2021060166A JP7636938B2 JP 7636938 B2 JP7636938 B2 JP 7636938B2 JP 2021060166 A JP2021060166 A JP 2021060166A JP 2021060166 A JP2021060166 A JP 2021060166A JP 7636938 B2 JP7636938 B2 JP 7636938B2
- Authority
- JP
- Japan
- Prior art keywords
- sintered ore
- cao
- sintering
- raw material
- ratio
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title claims description 28
- 238000004519 manufacturing process Methods 0.000 title claims description 16
- 238000000227 grinding Methods 0.000 title description 5
- 239000002994 raw material Substances 0.000 claims description 51
- 238000005245 sintering Methods 0.000 claims description 42
- 230000009467 reduction Effects 0.000 claims description 21
- 238000010304 firing Methods 0.000 claims description 12
- 239000000203 mixture Substances 0.000 claims description 11
- 238000001816 cooling Methods 0.000 claims description 4
- 150000001875 compounds Chemical class 0.000 claims description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 89
- 229910052595 hematite Inorganic materials 0.000 description 25
- 239000011019 hematite Substances 0.000 description 25
- LIKBJVNGSGBSGK-UHFFFAOYSA-N iron(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Fe+3].[Fe+3] LIKBJVNGSGBSGK-UHFFFAOYSA-N 0.000 description 25
- 239000002245 particle Substances 0.000 description 16
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 13
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 13
- 229910052742 iron Inorganic materials 0.000 description 11
- 238000012360 testing method Methods 0.000 description 10
- 230000008569 process Effects 0.000 description 9
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 8
- 239000010410 layer Substances 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000005469 granulation Methods 0.000 description 4
- 230000003179 granulation Effects 0.000 description 4
- 238000010587 phase diagram Methods 0.000 description 4
- WETINTNJFLGREW-UHFFFAOYSA-N calcium;iron;tetrahydrate Chemical compound O.O.O.O.[Ca].[Fe].[Fe] WETINTNJFLGREW-UHFFFAOYSA-N 0.000 description 3
- 230000035699 permeability Effects 0.000 description 3
- 238000011946 reduction process Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 235000019738 Limestone Nutrition 0.000 description 2
- 239000011247 coating layer Substances 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 238000002425 crystallisation Methods 0.000 description 2
- 230000008025 crystallization Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 239000011361 granulated particle Substances 0.000 description 2
- 239000006028 limestone Substances 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- -1 secondary hematite Chemical compound 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910000859 α-Fe Inorganic materials 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 229910017108 Fe—Fe Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 238000009766 low-temperature sintering Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/0046—Making spongy iron or liquid steel, by direct processes making metallised agglomerates or iron oxide
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/16—Sintering; Agglomerating
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/0006—Making spongy iron or liquid steel, by direct processes obtaining iron or steel in a molten state
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/004—Making spongy iron or liquid steel, by direct processes in a continuous way by reduction from ores
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/16—Sintering; Agglomerating
- C22B1/18—Sintering; Agglomerating in sinter pots
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/24—Binding; Briquetting ; Granulating
- C22B1/2413—Binding; Briquetting ; Granulating enduration of pellets
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/24—Binding; Briquetting ; Granulating
- C22B1/242—Binding; Briquetting ; Granulating with binders
- C22B1/243—Binding; Briquetting ; Granulating with binders inorganic
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Organic Chemistry (AREA)
- Metallurgy (AREA)
- Materials Engineering (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mechanical Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Inorganic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Description
(1)前記鉄源原料に含まれるFe2O3およびCaOのFe2O3/(Fe2O3+CaO)比を0.76~0.80にすること、
(2)前記焼結配合原料に含まれるFe2O3/(Fe2O3+CaO)比を0.76~0.84に調製したFe2O3およびCaOを、前記Fe2O3およびCaO以外の焼結配合原料の造粒中の後段から添加すること、
がより好ましい態様となる。
図1は、焼結鉱のFe2O3およびCaOについての状態図を示すものである。通常の焼結鉱は、Fe2O3およびCaOを含む造粒後の焼結造粒原料を、昇温、降温して焼成することにより、図1に示すような成分構成のものになる。ここで、図1中の(1)のルートを経るときは、約1350℃以上まで昇温するとマグネタイト生成領域となり、焼結鉱中の残存ヘマタイトがマグネタイトとなる。そこから降温すると、そのマグネタイトはヘマタイトに変わり、さらに約1350℃以下からヘマタイトが晶出する。この晶出したヘマタイトを2次ヘマタイトと呼ぶ。2次ヘマタイトは、その形状、組成から還元粉化を悪化させることが知られている。なお、図1中(2)の低温焼成のルートでも同様であり、溶融物が少なく晶出量を抑制できるものの、降温過程で2次ヘマタイトが生成してしまう。
以下の表1に記載の各種配合を行った焼結配合原料(鉄鉱石、石灰石、返鉱、粉コークス)と水(造粒物が7.5%となる水分)をドラムミキサーに入れ、合計5分間造粒を行い、焼結用造粒原料を作製した。表1中、鉱石Aとしては南米北部鉱を用い、鉱石Bとしては南米南部鉱を用い、鉱石Cとしては豪州鉱を用いた。
試験1で用いた比較例2と同じ原料条件で、Fe2O3/(Fe2O3+CaO)比が0.76~0.84となる原料を、Fe2O3/(Fe2O3+CaO)比を0.76~0.84に調製したFe2O3およびCaO以外の焼結配合原料の造粒後半で添加し、焼結鉱を構成する粒子において、Fe2O3/(Fe2O3+CaO)比が0.76~0.84となる外層として被覆層を設けた場合の効果について検討した。
2、12 焼結鉱
13 内層
14 外層
Claims (3)
- 焼結配合原料を造粒して焼結用造粒原料を作製し、その焼結用造粒原料を焼成して焼結鉱を得る焼結鉱の製造方法において、前記焼結配合原料としてその中に含まれるFe2O3およびCaOの比Fe2O3/(Fe2O3+CaO)が0.76~0.84の範囲内であるものを焼結し急速に冷却することで、低還元粉化性の焼結鉱を得ることを特徴とする、焼結鉱の製造方法。
- 前記焼結配合原料に含まれるFe2O3およびCaOのFe2O3/(Fe2O3+CaO)比を0.76~0.80にすることを特徴とする、請求項1に記載の焼結鉱の製造方法。
- 焼結配合原料としてその中に含まれるFe2O3およびCaOの比Fe2O3/(Fe2O3+CaO)が0.76~0.84の範囲内であるものを焼結し急速に冷却することで、低還元粉化性の焼結鉱を得ることを特徴とする、焼結鉱の粉化抑制方法。
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2021060166A JP7636938B2 (ja) | 2021-03-31 | 2021-03-31 | 焼結鉱の製造方法および粉化抑制方法 |
EP21935138.4A EP4299774A4 (en) | 2021-03-31 | 2021-11-24 | PRODUCTION METHOD AND DISINTEGRATION SUPPRESSION METHOD FOR SINTERED ORE |
KR1020237034115A KR20230154318A (ko) | 2021-03-31 | 2021-11-24 | 소결광의 제조 방법 및 분화 억제 방법 |
CN202180096344.5A CN117062923A (zh) | 2021-03-31 | 2021-11-24 | 烧结矿的制造方法及粉化抑制方法 |
BR112023019813A BR112023019813A2 (pt) | 2021-03-31 | 2021-11-24 | Método de produção e método de supressão de desintegração para minério sinterizado |
PCT/JP2021/042919 WO2022208985A1 (ja) | 2021-03-31 | 2021-11-24 | 焼結鉱の製造方法および粉化抑制方法 |
TW111102186A TWI790901B (zh) | 2021-03-31 | 2022-01-19 | 燒結礦的製造方法及粉化抑制方法 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2021060166A JP7636938B2 (ja) | 2021-03-31 | 2021-03-31 | 焼結鉱の製造方法および粉化抑制方法 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2022156458A JP2022156458A (ja) | 2022-10-14 |
JP7636938B2 true JP7636938B2 (ja) | 2025-02-27 |
Family
ID=83458314
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2021060166A Active JP7636938B2 (ja) | 2021-03-31 | 2021-03-31 | 焼結鉱の製造方法および粉化抑制方法 |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP4299774A4 (ja) |
JP (1) | JP7636938B2 (ja) |
KR (1) | KR20230154318A (ja) |
CN (1) | CN117062923A (ja) |
BR (1) | BR112023019813A2 (ja) |
TW (1) | TWI790901B (ja) |
WO (1) | WO2022208985A1 (ja) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2015129353A (ja) | 2013-07-10 | 2015-07-16 | Jfeスチール株式会社 | 焼結鉱製造用の炭材内装造粒粒子とその製造方法 |
JP2015183289A (ja) | 2014-03-26 | 2015-10-22 | 新日鐵住金株式会社 | 焼結鉱製造方法 |
JP2020158848A (ja) | 2019-03-27 | 2020-10-01 | 株式会社神戸製鋼所 | 焼結での製鋼スラグの使用方法 |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60162734A (ja) * | 1984-01-31 | 1985-08-24 | Sumitomo Metal Ind Ltd | 焼結鉱の製造方法 |
JPS61113731A (ja) * | 1984-11-06 | 1986-05-31 | Sumitomo Metal Ind Ltd | 焼結鉱製造方法 |
JPS62185837A (ja) * | 1986-02-12 | 1987-08-14 | Sumitomo Metal Ind Ltd | 焼結原料の事前処理方法 |
JP4048734B2 (ja) * | 2001-06-18 | 2008-02-20 | 住友金属工業株式会社 | 焼結鉱の製造方法 |
JP2003293045A (ja) | 2002-04-05 | 2003-10-15 | Nippon Steel Corp | 耐還元粉化性の優れた低スラグ焼結鉱の製造方法 |
JP6764875B2 (ja) | 2015-03-17 | 2020-10-07 | コリア ユニバーシティ リサーチ アンド ビジネス ファウンデーションKorea University Research And Business Foundation | マグネタイト系焼結鉱およびその製造方法 |
-
2021
- 2021-03-31 JP JP2021060166A patent/JP7636938B2/ja active Active
- 2021-11-24 CN CN202180096344.5A patent/CN117062923A/zh active Pending
- 2021-11-24 KR KR1020237034115A patent/KR20230154318A/ko active Pending
- 2021-11-24 BR BR112023019813A patent/BR112023019813A2/pt unknown
- 2021-11-24 WO PCT/JP2021/042919 patent/WO2022208985A1/ja active Application Filing
- 2021-11-24 EP EP21935138.4A patent/EP4299774A4/en active Pending
-
2022
- 2022-01-19 TW TW111102186A patent/TWI790901B/zh active
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2015129353A (ja) | 2013-07-10 | 2015-07-16 | Jfeスチール株式会社 | 焼結鉱製造用の炭材内装造粒粒子とその製造方法 |
JP2015183289A (ja) | 2014-03-26 | 2015-10-22 | 新日鐵住金株式会社 | 焼結鉱製造方法 |
JP2020158848A (ja) | 2019-03-27 | 2020-10-01 | 株式会社神戸製鋼所 | 焼結での製鋼スラグの使用方法 |
Non-Patent Citations (2)
Title |
---|
多木 寛, 焼結鉱製造プロセスにおけるマグネタイト(Fe2+源)の有効利用に関する基礎的研究, 博士論文(九州大学), 2016, 発行日, 第1-13頁, doi.org/10.15017/1806992 |
焼結鉱製造における2層ペレット法適用の基礎的検討, 鉄と鋼, 日本, 一般社団法人 日本鉄鋼協会, 1984年04月01日, 発行日, 70巻, 6号, p.520-526 |
Also Published As
Publication number | Publication date |
---|---|
EP4299774A1 (en) | 2024-01-03 |
TW202239977A (zh) | 2022-10-16 |
KR20230154318A (ko) | 2023-11-07 |
TWI790901B (zh) | 2023-01-21 |
WO2022208985A1 (ja) | 2022-10-06 |
BR112023019813A2 (pt) | 2023-11-07 |
JP2022156458A (ja) | 2022-10-14 |
CN117062923A (zh) | 2023-11-14 |
EP4299774A4 (en) | 2024-09-11 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
KR101145603B1 (ko) | 환원철 펠릿의 제조 방법 및 선철의 제조 방법 | |
EP1605067A1 (en) | Process for producing particulate iron metal | |
CN104561534A (zh) | 一种含镁熔剂性氧化球团矿及其制备方法 | |
CN104357657A (zh) | 一种利用转炉除尘灰制备氧化球团的方法 | |
CN102021318A (zh) | 一种镁质自熔性球团矿及其制备方法 | |
JP7636938B2 (ja) | 焼結鉱の製造方法および粉化抑制方法 | |
JP6477167B2 (ja) | 焼結鉱の製造方法 | |
US4356027A (en) | Iron ore pellets containing magnesium oxide | |
JP7135770B2 (ja) | 焼結鉱の製造方法 | |
JPH0310027A (ja) | 高ゲーサイト鉱石の事前処理法 | |
JP2015105427A (ja) | 還元鉄の製造方法 | |
JPH0617152A (ja) | 高ゲーサイト鉱石を原料とする高炉用焼結鉱の製造法 | |
JP4501656B2 (ja) | 焼結鉱の製造方法 | |
JPH0237410B2 (ja) | ||
RU2625362C2 (ru) | Способ получения агломерата восстановленного железа | |
JP7424339B2 (ja) | 塊成物製造用の原料粒子、塊成物製造用の原料粒子の製造方法、塊成物、塊成物の製造方法および還元鉄の製造方法 | |
JP2002256312A (ja) | 高炉への微粉炭多量吹込み操業方法 | |
TW201809289A (zh) | 產生高料層碳熱還原鐵的配渣控制方法 | |
JP4661077B2 (ja) | 焼結鉱の製造方法 | |
JP2008088533A (ja) | 焼結鉱の製造方法 | |
JP2001348622A (ja) | 高炉用高品質低SiO2焼結鉱の製造方法 | |
JP2024047288A (ja) | 鉄鉱石ペレットの製造方法及び鉄鉱石ペレット | |
JPS61201739A (ja) | 焼結鉱の処理方法 | |
JPS61113732A (ja) | クロム鉱石の焼結法 | |
JPS6317897B2 (ja) |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20221028 |
|
A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20230523 |
|
A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20230615 |
|
A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20230822 |
|
A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20230915 |
|
A02 | Decision of refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 20231107 |
|
A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20241112 |
|
A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20250214 |
|
R150 | Certificate of patent or registration of utility model |
Ref document number: 7636938 Country of ref document: JP Free format text: JAPANESE INTERMEDIATE CODE: R150 |