JP2015218351A - 粒状金属鉄の製造方法 - Google Patents
粒状金属鉄の製造方法 Download PDFInfo
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 281
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 116
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 16
- 238000010438 heat treatment Methods 0.000 claims abstract description 58
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 48
- 238000000034 method Methods 0.000 claims abstract description 24
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims description 134
- 239000007789 gas Substances 0.000 claims description 84
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 56
- 229910052799 carbon Inorganic materials 0.000 claims description 55
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 46
- 229910052760 oxygen Inorganic materials 0.000 claims description 46
- 239000001301 oxygen Substances 0.000 claims description 46
- 239000000203 mixture Substances 0.000 claims description 34
- 239000000126 substance Substances 0.000 claims description 26
- 230000008018 melting Effects 0.000 claims description 20
- 238000002844 melting Methods 0.000 claims description 20
- 239000000463 material Substances 0.000 claims description 15
- 239000003795 chemical substances by application Substances 0.000 claims description 11
- 239000008188 pellet Substances 0.000 description 50
- 239000003575 carbonaceous material Substances 0.000 description 26
- 239000002893 slag Substances 0.000 description 18
- 239000011230 binding agent Substances 0.000 description 12
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 12
- 239000002245 particle Substances 0.000 description 10
- 230000009467 reduction Effects 0.000 description 10
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 8
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 8
- 230000007423 decrease Effects 0.000 description 7
- 239000002184 metal Substances 0.000 description 7
- 229910052751 metal Inorganic materials 0.000 description 7
- 239000002994 raw material Substances 0.000 description 7
- 230000002776 aggregation Effects 0.000 description 6
- 239000003245 coal Substances 0.000 description 6
- 238000002485 combustion reaction Methods 0.000 description 6
- 239000003345 natural gas Substances 0.000 description 6
- 238000005054 agglomeration Methods 0.000 description 5
- 238000002156 mixing Methods 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 239000000292 calcium oxide Substances 0.000 description 4
- 235000012255 calcium oxide Nutrition 0.000 description 4
- 239000001569 carbon dioxide Substances 0.000 description 4
- 229910002092 carbon dioxide Inorganic materials 0.000 description 4
- -1 gangue Chemical compound 0.000 description 4
- 230000003647 oxidation Effects 0.000 description 4
- 238000007254 oxidation reaction Methods 0.000 description 4
- 230000001590 oxidative effect Effects 0.000 description 4
- 230000035484 reaction time Effects 0.000 description 4
- 238000012546 transfer Methods 0.000 description 4
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 3
- 229910004298 SiO 2 Inorganic materials 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000009408 flooring Methods 0.000 description 3
- 239000000446 fuel Substances 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 238000010405 reoxidation reaction Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 239000004484 Briquette Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 241000209140 Triticum Species 0.000 description 2
- 235000021307 Triticum Nutrition 0.000 description 2
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 2
- 239000000920 calcium hydroxide Substances 0.000 description 2
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 2
- 235000011116 calcium hydroxide Nutrition 0.000 description 2
- 239000000571 coke Substances 0.000 description 2
- 238000010411 cooking Methods 0.000 description 2
- 229910001873 dinitrogen Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 235000013312 flour Nutrition 0.000 description 2
- 238000005187 foaming Methods 0.000 description 2
- 150000004676 glycans Chemical class 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 229920001282 polysaccharide Polymers 0.000 description 2
- 239000005017 polysaccharide Substances 0.000 description 2
- 230000009257 reactivity Effects 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 229910004261 CaF 2 Inorganic materials 0.000 description 1
- 229920002261 Corn starch Polymers 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 229910017344 Fe2 O3 Inorganic materials 0.000 description 1
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 235000019738 Limestone Nutrition 0.000 description 1
- BUGBHKTXTAQXES-UHFFFAOYSA-N Selenium Chemical compound [Se] BUGBHKTXTAQXES-UHFFFAOYSA-N 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000004931 aggregating effect Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 229910001570 bauxite Inorganic materials 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000000440 bentonite Substances 0.000 description 1
- 229910000278 bentonite Inorganic materials 0.000 description 1
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 1
- 229910001593 boehmite Inorganic materials 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 239000008120 corn starch Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 229910001648 diaspore Inorganic materials 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000010459 dolomite Substances 0.000 description 1
- 229910000514 dolomite Inorganic materials 0.000 description 1
- 235000012489 doughnuts Nutrition 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000010436 fluorite Substances 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 229910001679 gibbsite Inorganic materials 0.000 description 1
- 238000005469 granulation Methods 0.000 description 1
- 230000003179 granulation Effects 0.000 description 1
- FAHBNUUHRFUEAI-UHFFFAOYSA-M hydroxidooxidoaluminium Chemical compound O[Al]=O FAHBNUUHRFUEAI-UHFFFAOYSA-M 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000012256 powdered iron Substances 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 239000011214 refractory ceramic Substances 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 229910052711 selenium Inorganic materials 0.000 description 1
- 239000011669 selenium Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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
- C21B13/0053—On a massing grate
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B11/00—Making pig-iron other than in blast furnaces
- C21B11/08—Making pig-iron other than in blast furnaces in hearth-type furnaces
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B11/00—Making pig-iron other than in blast furnaces
- C21B11/10—Making pig-iron other than in blast furnaces in electric furnaces
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/0066—Preliminary conditioning of the solid carbonaceous reductant
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/10—Making spongy iron or liquid steel, by direct processes in hearth-type furnaces
- C21B13/105—Rotary hearth-type furnaces
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/12—Making spongy iron or liquid steel, by direct processes in electric furnaces
-
- 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
-
- 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
- C22B1/244—Binding; Briquetting ; Granulating with binders organic
- C22B1/245—Binding; Briquetting ; Granulating with binders organic with carbonaceous material for the production of coked agglomerates
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2300/00—Process aspects
- C21B2300/02—Particular sequence of the process steps
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Mechanical Engineering (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Manufacture Of Iron (AREA)
- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
Abstract
【解決手段】炭素質還元剤に含まれる揮発分の質量割合(質量%)と、加熱炉内における雰囲気ガスの平均ガス流速(m/秒)との関係が、下記式(1)を満足する粒状金属鉄の製造方法。
揮発分の質量割合≦−4.62×平均ガス流速+46.7 ・・・(1)
【選択図】図4
Description
揮発分の質量割合≦−4.62×平均ガス流速+46.7 ・・・(1)
FeO+C=Fe+CO
xC+FeOx=xCO+Fe ・・・(A)
C+CO2=2CO ・・・(B)
揮発分の質量割合≦−4.62×平均ガス流速+46.7 ・・・(1)
揮発分の質量割合≦−4.62×平均ガス流速+45.3 ・・・(1a)
揮発分の質量割合≦−4.62×平均ガス流速+43.4 ・・・(1b)
塊成化工程では、酸化鉄含有物質および炭素質還元剤を含む混合物を塊成化して塊成物を製造する。上記酸化鉄含有物質としては、具体的には、鉄鉱石、砂鉄、製鉄ダスト、非鉄精錬残渣、製鉄廃棄物などの酸化鉄源を用いることができる。上記炭素質還元剤としては、炭素を含有する還元剤を用いることができ、例えば、石炭やコークスなどが挙げられる。
加熱工程では、上記塊成化工程で得られた塊成物を加熱炉の炉床上に装入して加熱することによって、該塊成物中の酸化鉄を還元し、更に加熱して還元鉄を溶融し、還元鉄を凝集させて粒状金属鉄を製造する。
上記加熱工程で得られた粒状金属鉄は、粒状金属鉄とスラグに分離し、粒状金属鉄を回収すればよい。回収した粒状金属鉄は、例えば、高炉、転炉、電気炉などにおいて鉄源として用いることができる。
上記酸化鉄含有物質としては、下記表1に示す成分組成の鉄鉱石αを用いた。下記表1において、T.Feは全鉄を意味している。また、下記表1には、鉄鉱石αに含まれるFeO中の酸素量、鉄鉱石αに含まれるFe2O3中の酸素量を算出した結果を併せて示す。また、鉄鉱石αに含まれるFeOおよびFe2O3をFeOxと示したとき、鉄鉱石αに含まれるFeOx中の酸素量を下記表1に併せて示す。
下記表3に示されるように、乾燥ペレットAに含まれる鉄鉱石量は71.34%であり、該鉄鉱石に含まれるFeOx中の酸素量は下記表1から27.67%であるから、乾燥ペレットAの質量を100%としたときの該乾燥ペレットAに含まれる鉄鉱石中の酸素量は19.74%となる。
(71.34×27.67)/100=19.74
下記表3に示されるように、乾燥ペレットAに含まれる炭材量は16.27%であり、該炭材に含まれる固定炭素量は下記表2から78.00%であるから、乾燥ペレットAの質量を100%としたときの該乾燥ペレットAに含まれる炭材中の固定炭素量は12.69%となる。
(16.27×78.00)/100=12.69
Z=−4.62×平均ガス流速+46.7
歩留まり(%)=(粒状金属鉄の質量/乾燥ペレットに含まれるT.Feの質量)×100
生産性=(A×B×C)/D
A=乾燥ペレットの見掛け密度(g/cm3)
B=乾燥ペレットに含まれる全鉄の量(質量%)
C=乾燥ペレットを還元溶融するために必要な時間(分)
D=粒状金属鉄の歩留まり(%)
上記酸化鉄含有物質としては、上記表1に示す成分組成の鉄鉱石αを用いた。上記炭素質還元剤としては、上記表2に示す成分組成の炭材a〜dを用いた。上記鉄鉱石と上記炭材に、融点調整剤およびバインダーを混合し、更に適量の水を配合した混合物を、上記実験例1と同じ手順で平均直径が19mmの生ペレットに造粒した。
Claims (3)
- 酸化鉄含有物質および炭素質還元剤を含む混合物を塊成化し、得られた塊成物を加熱炉の炉床上に装入して加熱することによって、該塊成物中の酸化鉄を還元し、更に加熱して還元鉄を溶融し、還元鉄を凝集させて粒状金属鉄を製造する方法であって、
上記塊成物を上記加熱炉の炉床上で加熱する際、
前記炭素質還元剤に含まれる揮発分の質量割合(質量%)と、前記加熱炉内における雰囲気ガスの平均ガス流速(m/秒)との関係が、下記式(1)を満足することを特徴とする粒状金属鉄の製造方法。
揮発分の質量割合≦−4.62×平均ガス流速+46.7 ・・・(1) - 前記塊成物に含まれる酸化鉄含有物質由来の酸素量(質量%)を、該塊成物に含まれる炭素質還元剤由来の固定炭素量(質量%)で除した値(酸素量/固定炭素量)が1.46〜2.67である請求項1に記載の製造方法。
- 前記混合物は、更に、融点調整剤を含有する請求項1または2に記載の製造方法。
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2014101724A JP6294152B2 (ja) | 2014-05-15 | 2014-05-15 | 粒状金属鉄の製造方法 |
PCT/JP2015/063755 WO2015174450A1 (ja) | 2014-05-15 | 2015-05-13 | 粒状金属鉄の製造方法 |
RU2016146945A RU2669653C2 (ru) | 2014-05-15 | 2015-05-13 | Способ производства гранулированного металлического железа |
CN201580027036.1A CN106414778B (zh) | 2014-05-15 | 2015-05-13 | 粒状金属铁的制造方法 |
UAA201612147A UA118477C2 (uk) | 2014-05-15 | 2015-05-13 | Спосіб виробництва гранульованого металевого заліза |
US15/310,483 US10407744B2 (en) | 2014-05-15 | 2015-05-13 | Production method of granular metallic iron |
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JP2014101724A JP6294152B2 (ja) | 2014-05-15 | 2014-05-15 | 粒状金属鉄の製造方法 |
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JP2015218351A true JP2015218351A (ja) | 2015-12-07 |
JP2015218351A5 JP2015218351A5 (ja) | 2016-01-21 |
JP6294152B2 JP6294152B2 (ja) | 2018-03-14 |
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US (1) | US10407744B2 (ja) |
JP (1) | JP6294152B2 (ja) |
CN (1) | CN106414778B (ja) |
RU (1) | RU2669653C2 (ja) |
UA (1) | UA118477C2 (ja) |
WO (1) | WO2015174450A1 (ja) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2018127694A (ja) * | 2017-02-09 | 2018-08-16 | 住友金属鉱山株式会社 | 金属酸化物の製錬方法 |
JP2020517837A (ja) * | 2017-04-18 | 2020-06-18 | バインディング ソリューションズ リミティド | 鉄鉱石ペレット |
WO2021037700A1 (en) * | 2019-08-23 | 2021-03-04 | Schultes John W | Method and a direct reduction plant for producing direct reduced iron |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
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CN112662867A (zh) * | 2020-12-11 | 2021-04-16 | 四川德胜集团钒钛有限公司 | 一种钢渣回收利用的烧结方法 |
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US10407744B2 (en) | 2019-09-10 |
CN106414778A (zh) | 2017-02-15 |
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RU2669653C2 (ru) | 2018-10-12 |
JP6294152B2 (ja) | 2018-03-14 |
RU2016146945A3 (ja) | 2018-06-19 |
RU2016146945A (ru) | 2018-06-19 |
US20170073781A1 (en) | 2017-03-16 |
UA118477C2 (uk) | 2019-01-25 |
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