WO2009047927A1 - ヤシガラ炭使用のアーク炉製鋼方法 - Google Patents
ヤシガラ炭使用のアーク炉製鋼方法 Download PDFInfo
- Publication number
- WO2009047927A1 WO2009047927A1 PCT/JP2008/056733 JP2008056733W WO2009047927A1 WO 2009047927 A1 WO2009047927 A1 WO 2009047927A1 JP 2008056733 W JP2008056733 W JP 2008056733W WO 2009047927 A1 WO2009047927 A1 WO 2009047927A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- charcoal
- coconut
- arc furnace
- palm
- scrap
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- 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
- C21C5/5211—Manufacture of steel in electric furnaces in an alternating current [AC] electric arc furnace
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- 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
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- 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
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/0025—Adding carbon material
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/0025—Adding carbon material
- C21C2007/0031—Adding carbon material being plastics, organic compounds, polymers
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/10—Biofuels, e.g. bio-diesel
-
- 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
Definitions
- the present invention relates to an arc furnace steelmaking method for producing molten steel by melting iron scrap.
- the present invention relates to an arc furnace steelmaking method for producing molten steel using an auxiliary fuel or a carburized material.
- the arc furnace for steelmaking produces steel materials that are used for building materials, etc., by melting and scraping raw steel scrap.
- the main energy source of this arc furnace is electric heat (arc heat), but oxygen gas (for iron oxidative dissolution), gaseous fuel or liquid fuel, to promote melting and scouring and save expensive electric energy,
- An auxiliary heat source such as powder coke is used.
- the most important auxiliary heat sources are solid fuels rich in solid carbon such as coke, anthracite as an alternative, and oil cortas. This solid fuel functions not only as a heat source but also as a reducing agent, and plays an important role in the refinement process itself.
- the amount of coatas used per ton of iron has reached 20-30 kg.
- the object of the present invention is to use a biomass carbide close to the physical properties of coke as a substitute for coke when producing molten steel by melting and refining a cold iron source such as iron scrap in an arc furnace, thereby producing a large amount of greenhouse effect. It is an object of the present invention to provide an arc furnace steelmaking method capable of reducing gas generation.
- the present invention provides:
- a step of carbonizing coconut palm or oil palm palm (Coconut shell charcoal or PKS charcoal), mixing carbide having a residual volatile content of 12 3 ⁇ 4 or more into iron scrap and charging it into an arc furnace;
- An arc furnace steelmaking method is provided.
- the process of mixing carbide into iron scrap and charging it into the arc furnace is obtained by dry distillation of coconut palm or palm palm coconut palm (Coconut shel charcoal or PKS charcoal), and has a residual volatile content of 12% or more. Carbon material derived from fossil fuels may be mixed with iron scrap and charged into the arc furnace.
- the arc furnace steelmaking method of the present invention is further obtained by dry-distilling coconut palm or oil palm coconut palm (Coconut shel charcoal or PKS charcoal), and injecting carbide with a residual volatile content of less than 12% into the arc furnace from the lance. It is preferable to have a process.
- Fig. 1 shows the relationship between the processing temperature and processing time of coconut shell charcoal and the yield.
- Figure 2 shows the relationship between yield and residual volatiles.
- FIG. 3 is a schematic diagram showing a state in which the present invention is carried out in an arc furnace, and is a schematic diagram showing a state of scrap melting at an initial stage.
- FIG. 4 is a schematic diagram showing a state in which the present invention is carried out in an arc furnace, and is a schematic diagram showing a state immediately after the scraps are melted.
- FIG. 5 is a schematic diagram showing a state in which the present invention is carried out in an arc furnace, and is a schematic diagram showing a refined stage of molten steel after completion of temperature increase.
- biomass carbide In the arc furnace steelmaking process, solid fuel containing carbon is used, and a large amount of carbon dioxide derived from fossil fuels is discharged into the atmosphere. The emitted carbon dioxide becomes a greenhouse gas. If biomass charcoal is used instead of this coatus, greenhouse gas emissions will be eliminated. However, many biomass carbides have problems such as low solid carbon content compared to coke and extremely low bulk density. Therefore, biomass carbide is not used as a solid fuel in the arc furnace steelmaking process. ⁇
- coconut palm and oil palm industries are nowadays.
- coconut husks generated in large quantities here are carbonized to become carbide (Cahrcoal).
- the charcoal obtained by carbonizing coconut palm or oil palm palm will be referred to as “coconut shell charcoal”.
- This coconut husk charcoal has a bulk density slightly lower than that of Kotas and has a high solid carbon content. Therefore, it can be used in an arc furnace for steelmaking as a substitute for fossil fuels such as Kotas.
- Table 1 shows a comparison of physical properties between oil palm charcoal and Kotas.
- coconut husk charcoal is a good fuel because it has a higher calorific value and less ash and sulfur content than Cotas.
- the use of coconut husk charcoal is currently limited to almost only activated carbon raw material, and the scale of production is small, and with the recent rise in fossil fuel ffi rating, coconut husk charcoal has begun to be traded as a fuel of higher price than coal. Therefore, the electric furnace companies are not in continuous use. Indonesian and Malaysian coke and alternative fossil fuel prices are 180-200 US $ / ton, coconut shell price is 40 US $ / ton, coconut shell coal price is 250-270 US $ / ton. There is no continuous use by electric furnace companies.
- the present invention increases the economic efficiency of alternative coconut husk charcoal by leaving the volatile matter in coconut husk charcoal to a level that can be used in a steelmaking electric furnace and increasing the yield. For example, if the yield is 35%, the raw material cost is 114 US $ and the coconut shell coal price is 214 US $ / ton 45%, the raw material cost is 89 US $ and the coconut shell coal price is 189 US $ / ton. Can be sufficiently competitive.
- FIG 1 shows the relationship between the processing temperature and processing time of coconut husk charcoal and the yield.
- Figure 2 shows the relationship between yield and residual volatile matter.
- coconut husk charcoal is produced by increasing the yield and leaving much volatile content (12% or more) when coconut husk charcoal is produced.
- this coconut husk charcoal is used in an electric furnace, coarse particles are mixed in the scrap before melting and charged into the furnace. Volatiles burn when scrap dissolves and become a heat source, and the remaining solid carbon works as a carburizing material. The total amount of scrap-mixed carbon is this coconut charcoal In addition, with this carbon material as a part, the remainder may be low volatile matter / high solid carbon as in the past.
- electrostatic Steelmaking 56th No. 1 (1985) (January issue) “Reduction of FeO in hot metal by solid carbon”
- the blown carbon material it is desirable to have low volatile matter and high solid carbon as before.
- FIGs. 3 to 5 are schematic diagrams showing how the present invention is carried out when the cold iron source is melted in the arc furnace, and Fig. 3 shows the initial state of melting of the cold iron source.
- Fig. 4 shows the state immediately after the cold iron source has melted, and
- Fig. 5 shows the molten copper refinement stage after the completion of temperature increase at the end of the arc furnace steelmaking process.
- a metal furnace side wall 3 having a water-cooled structure is disposed on the upper periphery of the furnace body 2 whose outer shell is an iron shell and is internally made of refractory.
- the upper opening is openable and closable and covered with a water-cooled metal furnace lid 4.
- three graphite electrodes 5 are provided that pass through the furnace lid 4 and can move up and down to the inside of the furnace body 2.
- Each electrode 5 is connected to a three-phase AC power source (not shown), and between the electrode 5 and the electrode 5 and the furnace interior such as the electrode 5 and the cold iron source 9 and the molten steel 10. Arcs 1 and 2 are generated between the two.
- an oxygen gas blowing lance 6 and a carbonaceous material blowing lance 7 that can move up and down through the furnace side wall 3 to the inside of the furnace body 2 are provided. From the oxygen gas blowing lance 6, oxygen gas is supplied. Is blown into the furnace body 2, and the carbon material is blown into the furnace body 2 from the carbon material blowing lance 7 using air or nitrogen gas as a transfer gas.
- the furnace lid 4 is provided with a duct 8, and high-temperature exhaust gas generated in the furnace is sucked into the dust collector (not shown) through the duct 8, and the furnace body 2 has a steel outlet ( (Not shown) is provided.
- a supply packet suspended by crane or the like which is obtained by carbonizing scrap 9 and coconut palm or oil palm palm (Coconut shel lc harcoal or PKS charcoal) having a residual volatile content of 12% or more, is suspended. G (not shown), etc.; ⁇ Charged into the furnace of the arc furnace 1 with the lid 4 opened (this period is called the “raw material charging period”). Then the furnace The lid 4 is closed and the 1 ⁇ 2 electrode 5 is inserted into the furnace, an arc 12 is generated between the electrode 5 and the scrap 9, and the scrap 9 is melted by the generated arc heat to generate molten steel 10 ( This period is called the “scrap melting period”).
- Residual volatiles in the carbides charged with the scrap are burned at the time of melting and become a heat source, and the remaining solid carbon acts as a heat source and a carburizing material.
- a flux such as quick lime or fluorite is charged into the furnace to form molten slag 11 on the molten steel 10 to prevent oxidation of the molten iron 10. It is intended to keep the molten steel 10 warm.
- the generated molten steel 10 is heated to a predetermined temperature by arc heat (this period is referred to as the “temperature rising period”).
- the composition of the molten steel 10 is adjusted (this period is referred to as the “refining period”), and then the molten steel 10 is discharged from the outlet port into the molten steel holding container and discharged. After steel, discharge molten slag 1 1 to slag pots etc. as necessary
- molten steel 10 is produced from scrap 9.
- coke and cox alternative coconut husk charcoal can be used as an auxiliary fuel or a carburizing material during the scrap melting period, the heating period, and the refinement period of this steelmaking process.
- an arc 12 is generated between the electrode 5 and the scrap 9, and the scrap 9 is melted by the generated arc heat to generate molten steel 10.
- Residual volatile matter in the carbide 20 burns when dissolved and becomes a heat source, and the remaining solid carbon acts as a heat source and a carburizing material.
- oxygen gas is blown from oxygen gas blowing lance 6 toward scrap 9 accumulated in the furnace, and carbon material blowing lance 7 is low.
- Volatile matter ⁇ Blow in high solid carbon charcoal Part of the scrap 9 is oxidized by the oxygen gas that is blown in, and is heated and melted by the generated heat of oxidation.
- the carbon material is blown from the carbon material blowing lance 7 to the molten slag 1 1.
- the molten slag is also melted by CO gas generated by the reduction reaction of iron oxide in the molten slag.
- the arc 1 2 is wrapped in the molten slag 1 1 in the same way as the heating period described above.
- the tip of the carbon material blowing lance 7 is immersed in the molten steel 10 and the carbon material is blown into the molten steel.
- Table 3 shows the physical properties of coconut shell charcoal used in the experiment. This coconut charcoal has a volatile content
- Anthracite (volatile content 2%) was used. For this reason, the volatile content of scrap-mixed charcoal is 25%.
- Charcoal A is the coconut charcoal in Table 1
- Charcoal B is the highly volatile coconut charcoal in Table 3.
- Carbide B (Charcoal B) is used in Heat Nos. 7 and 8 mixed with anthracite.
- the amount of carbon (%) in the molten steel at the time of steel production has no adverse effect on the carburizing effect.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
- Treatment Of Steel In Its Molten State (AREA)
- Coke Industry (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2008800007094A CN101558170B (zh) | 2008-03-28 | 2008-03-28 | 使用棕榈壳木炭的电弧炉炼钢方法 |
PCT/JP2008/056733 WO2009047927A1 (ja) | 2008-03-28 | 2008-03-28 | ヤシガラ炭使用のアーク炉製鋼方法 |
JP2009506844A JP5042308B2 (ja) | 2008-03-28 | 2008-03-28 | ヤシガラ炭使用のアーク炉製鋼方法 |
KR1020097004943A KR101341758B1 (ko) | 2008-03-28 | 2008-03-28 | 야자 껍질탄을 이용한 아크로 제강방법 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2008/056733 WO2009047927A1 (ja) | 2008-03-28 | 2008-03-28 | ヤシガラ炭使用のアーク炉製鋼方法 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2009047927A1 true WO2009047927A1 (ja) | 2009-04-16 |
Family
ID=40549077
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2008/056733 WO2009047927A1 (ja) | 2008-03-28 | 2008-03-28 | ヤシガラ炭使用のアーク炉製鋼方法 |
Country Status (4)
Country | Link |
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JP (1) | JP5042308B2 (ja) |
KR (1) | KR101341758B1 (ja) |
CN (1) | CN101558170B (ja) |
WO (1) | WO2009047927A1 (ja) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2011195887A (ja) * | 2010-03-19 | 2011-10-06 | Jfe Steel Corp | 鋼屑中の銅の除去方法及び鋼屑を鉄源とした溶鋼の製造方法 |
JP2013082997A (ja) * | 2011-09-28 | 2013-05-09 | Jfe Steel Corp | 転炉製鋼方法 |
JP2013136799A (ja) * | 2011-12-28 | 2013-07-11 | Jfe Steel Corp | 鉄スクラップを用いた高炭素溶鉄の製造方法 |
Families Citing this family (4)
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CN102959059B (zh) * | 2010-08-17 | 2015-11-25 | 宇部兴产株式会社 | 固体燃料及其制造方法、制造装置 |
CN103160630A (zh) * | 2013-02-20 | 2013-06-19 | 罕王实业集团有限公司 | 一种利用棕榈壳替代部分焦炭冶炼红土镍矿方法 |
CN113355474A (zh) * | 2021-05-25 | 2021-09-07 | 江阴市尚疯新能源技术开发有限公司 | 一种用铁矿、氢气、氧气炼钢铁碳中和的方法 |
CN115478127B (zh) * | 2022-09-21 | 2024-01-09 | 北京力科华越新材料科技有限公司 | 一种生物质发泡剂及其制备方法和在电弧炉泡沫渣埋弧炼钢中的应用 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS52120923A (en) * | 1976-04-05 | 1977-10-11 | Nittetsu Kinzoku Kogyo Kk | Flux for casting extremely soft rimmed steel |
JP2000008115A (ja) * | 1998-06-19 | 2000-01-11 | Nkk Corp | 冷鉄源の溶解方法 |
JP2001026810A (ja) * | 1999-07-14 | 2001-01-30 | Daido Steel Co Ltd | 電気炉の操業方法 |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009046726A (ja) * | 2007-08-20 | 2009-03-05 | Jp Steel Plantech Co | アーク炉製鋼方法 |
-
2008
- 2008-03-28 CN CN2008800007094A patent/CN101558170B/zh not_active Expired - Fee Related
- 2008-03-28 JP JP2009506844A patent/JP5042308B2/ja active Active
- 2008-03-28 KR KR1020097004943A patent/KR101341758B1/ko active IP Right Grant
- 2008-03-28 WO PCT/JP2008/056733 patent/WO2009047927A1/ja active Application Filing
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS52120923A (en) * | 1976-04-05 | 1977-10-11 | Nittetsu Kinzoku Kogyo Kk | Flux for casting extremely soft rimmed steel |
JP2000008115A (ja) * | 1998-06-19 | 2000-01-11 | Nkk Corp | 冷鉄源の溶解方法 |
JP2001026810A (ja) * | 1999-07-14 | 2001-01-30 | Daido Steel Co Ltd | 電気炉の操業方法 |
Non-Patent Citations (1)
Title |
---|
F. G. EMMERICH ET AL.: "Babassu Charcoal: A Sulfurless Renewable Thermo-Reducing Feedstock For Steelmaking", BIOMASS AND BIOENERGY, vol. 10, no. 1, 1996, pages 41 - 44 * |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2011195887A (ja) * | 2010-03-19 | 2011-10-06 | Jfe Steel Corp | 鋼屑中の銅の除去方法及び鋼屑を鉄源とした溶鋼の製造方法 |
JP2013082997A (ja) * | 2011-09-28 | 2013-05-09 | Jfe Steel Corp | 転炉製鋼方法 |
JP2013136799A (ja) * | 2011-12-28 | 2013-07-11 | Jfe Steel Corp | 鉄スクラップを用いた高炭素溶鉄の製造方法 |
Also Published As
Publication number | Publication date |
---|---|
JPWO2009047927A1 (ja) | 2011-02-17 |
JP5042308B2 (ja) | 2012-10-03 |
KR101341758B1 (ko) | 2013-12-16 |
CN101558170B (zh) | 2012-12-26 |
KR20100126171A (ko) | 2010-12-01 |
CN101558170A (zh) | 2009-10-14 |
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