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WO2007010674A1 - Procédé de production de coke et procédé de production de fonte en gueuse - Google Patents

Procédé de production de coke et procédé de production de fonte en gueuse Download PDF

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Publication number
WO2007010674A1
WO2007010674A1 PCT/JP2006/310578 JP2006310578W WO2007010674A1 WO 2007010674 A1 WO2007010674 A1 WO 2007010674A1 JP 2006310578 W JP2006310578 W JP 2006310578W WO 2007010674 A1 WO2007010674 A1 WO 2007010674A1
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WO
WIPO (PCT)
Prior art keywords
coal
less
mass
coatus
carbon content
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.)
Ceased
Application number
PCT/JP2006/310578
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English (en)
Japanese (ja)
Inventor
Noriyuki Okuyama
Atsushi Furuya
Nobuyuki Komatsu
Kanji Matsudaira
Yuko Nishibata
Masaru Nishimura
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kobe Steel Ltd
Kansai Coke and Chemicals Co Ltd
Original Assignee
Kobe Steel Ltd
Kansai Coke and Chemicals Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Kobe Steel Ltd, Kansai Coke and Chemicals Co Ltd filed Critical Kobe Steel Ltd
Priority to CN200680026729XA priority Critical patent/CN101233211B/zh
Priority to KR1020087003871A priority patent/KR101129061B1/ko
Publication of WO2007010674A1 publication Critical patent/WO2007010674A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
    • C10B57/00—Other carbonising or coking processes; Features of destructive distillation processes in general
    • C10B57/04—Other carbonising or coking processes; Features of destructive distillation processes in general using charges of special composition
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B5/00—Making pig-iron in the blast furnace
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B5/00—Making pig-iron in the blast furnace
    • C21B5/007—Conditions of the cokes or characterised by the cokes used

Definitions

  • the present invention relates to a coatus production technique using modified coking coal, and a pig iron production technique using the technique.
  • blended coal of high grade strong caking coal and low grade weak caking coal or non-caking coal is used. This is because blending high-grade strong caking coal improves the strength of the resulting coatus and further ensures gas permeability during operation in the blast furnace.
  • high-grade strong caking coal is gradually withering, its raw material costs are rising, and a large amount of low-grade weak caking coal and non-caking coal are modified.
  • the present invention has been made in view of the above circumstances, and a technique for improving the strength of the resulting coatus, and, when the coatus strength is comparable, is a valuable raw material for producing coatus.
  • the purpose is to provide technology that reduces the amount of strong caking coal and increases the usage of weak caking coal or non-caking coal.
  • the production method of the coatus of the present invention is a blended coal containing coal having a carbon content (daf) of 85% or more and 91% or less and coal having a carbon content (daf) of 60% or more and less than 85%.
  • a gist in using raw coal containing 1 mass part or less of coal substantially free of ash with respect to 100 mass parts.
  • Coal is generally classified into anthracite, strong caking coal, caking coal, weak caking coal, non-caking coal, lignite, and peat, but the definition is not necessarily clear.
  • a part of caking coal may be called adhesive charcoal. Therefore, in the present invention, anthracite, strongly caking coal, caking coal, weak caking coal, non-caking coal, etc.
  • anthracite is carbon content (daf) 91 Coal with a carbon content (daf) of 85% or more and 91% or less, coal with a carbon content (daf) of 83% or more and less than 85%, weak caking Coal is a coal with a carbon content (daf) of 80% or more and less than 83%, non-coking coal is a coal with a carbon content (daf) of 78% or more and less than 80%, and lignite has a carbon content (daf) of 70 % Or more and less than 78%, and peat shall be coal with a carbon content (daf) of less than 70%.
  • coal with a carbon content (daf) of 85% to 91% is simply referred to as ⁇ strong caking coal ''
  • coal with a carbon content (daf) of 60% to less than 85% is simply referred to as ⁇ non-caking coal ''.
  • Etc.
  • the strength of the coatus obtained can be improved by using a raw coal in which coal containing substantially no ash is contained in an amount within the above predetermined range.
  • a raw coal in which coal containing substantially no ash is contained in an amount within the above predetermined range.
  • the coal substantially free of ash for example, it is preferable to use a soluble component obtained by extraction using a coal-powered organic solvent having a carbon content (daf) of 60% or more and less than 95%.
  • the organic solvent include organic solvents containing a bicyclic aromatic compound as a main component.
  • the present invention includes a method for producing pig iron using the coatus obtained by the above-described method for producing coatus.
  • a weak caking coal or a non-caking coal having a carbon content (daf) of 60% or more and less than 95%.
  • Etc. Quality coal can be used, and it can cope with the problem of rising raw material costs.
  • the resulting coatus has a feature of excellent strength, and can be suitably used for the production of pig iron in a blast furnace.
  • FIG. 1 is an explanatory diagram illustrating an apparatus and a process for producing ashless coal used in the present invention.
  • the production method of the coatus of the present invention is a blended coal containing coal having a carbon content (daf) of 85% or more and 91% or less and coal having a carbon content (daf) of 60% or more and less than 85%.
  • Coking coal containing 1 part by mass or less of coal containing substantially no ash with respect to 0 part by mass is dry-distilled.
  • the ashless coal may be coal that does not substantially contain ash, but may contain a small amount of ash.
  • the ash content is preferably 5,000 Oppm or less, more preferably 2, OOOppm or less.
  • Ash is a residual inorganic substance when coal is incinerated by heating at 815 ° C.
  • ash, alumina, iron oxide, lime, magnesia, alkali metal, etc. can be used.
  • coal power having a carbon content (daf) of 60% or more and less than 95% can be obtained by extraction with an organic solvent. It is preferable to use a soluble component. This is because if non-coking coal or the like is used as a starting material, it will not be affected by the problem of drought of strong caking coal.
  • coal extracted with an organic solvent includes weakly caking coal, non-caking coal, lignite, or a mixture thereof having a carbon content (daf) of 70% or more and less than 83%. Use is a preferred embodiment.
  • the ashless coal is obtained by mixing coal with an organic solvent having a carbon content (daf) of 60% or more and less than 95% (more preferably 60% or more and less than 85%).
  • a slurry is prepared, the slurry is heated and aged to extract a soluble component in the organic solvent, and the resulting slurry is separated into a supernatant and a concentrated solution in which a solid phase component is concentrated.
  • the ashless coal can be obtained by filtering and removing the organic solvent by evaporation.
  • FIG. 1 is an explanatory diagram illustrating an apparatus and process for producing ashless coal. In tank 1, carbon content (d.
  • Coal with 60% or more and less than 95% and an organic solvent are mixed to form a slurry.
  • the obtained slurry is supplied to an extraction tank 4 where an extraction process is performed by a pump 2. At that time, the slurry is heated to a predetermined temperature by the preheater 3.
  • the extraction tank 4 After the soluble component is extracted into the organic solvent while stirring the slurry using the stirrer 10, the obtained slurry is supplied to the gravity settling tank 5.
  • gravity sedimentation is performed to settle the solid phase component (arrow 11), and the slurry is separated into a supernatant liquid and a liquid in which the solid phase component is concentrated.
  • the obtained supernatant is supplied to the filter unit 8, and the solid phase component concentrate settled in the gravity sedimentation tank 5 is collected in the solid phase component concentrate receiver 6.
  • the supernatant liquid is filtered by the filter member 7 of the filter unit 8, and the obtained filtrate is recovered in a supernatant liquid receiver 9 that recovers the supernatant liquid.
  • ashless coal can be obtained by evaporating and removing the recovered supernatant liquid organic solvent.
  • a general drying method such as a spray drying method, a distillation method, or a vacuum drying method can be applied.
  • the coal concentration in the slurry is suitably 10 to 35% by mass.
  • the conditions for heating and aging the slurry to extract soluble components in the organic solvent include, for example, Hold the slurry at 300 ° C to 420 ° C for 5 to 120 minutes to dissolve the soluble components in the coal. This is because a temperature lower than 300 ° C is insufficient to weaken the bonds between the molecules constituting the coal, and the proportion of soluble components that can extract coal power also decreases.
  • the temperature is higher than 420 ° C, the pyrolysis reaction of coal becomes active and recombination of generated pyrolysis radicals occurs, so that the ratio of soluble components to be extracted also decreases.
  • the temperature at which the obtained slurry is separated into the supernatant liquid and the solid phase component concentrate by gravity sedimentation is preferably 300 ° C or higher and 420 ° C or lower. This is because if the temperature is lower than 300 ° C, a part of the components dissolved in the liquid phase component is precipitated, and the yield of ashless coal may be lowered.
  • the organic solvent a solvent having a high coal dissolving power is preferred to a coal structural unit.
  • Organic solvents based on similar bicyclic aromatic compounds are preferred.
  • the organic solvent preferably has a boiling point of 180 ° C to 330 ° C. When the boiling point is lower than 180 ° C, the recovery rate of the organic solvent evaporated and removed from the supernatant may be lowered. On the other hand, if the boiling point exceeds 330 ° C, separation of coal and organic solvent becomes difficult, and the recovery rate of organic solvent may also decrease.
  • bicyclic aromatic compound examples include, for example, naphthalene (boiling point: 218 ° C); methylnaphthalene (boiling point: 241 to 242 ° C), dimethylnaphthalene (boiling point: 261 to 272 ° C), trimethylnaphthalene.
  • naphthalenes having an aliphatic side chain such as biphenyl; biphenyls having an aliphatic side chain or an aromatic substituent, or a mixture thereof.
  • Examples of coal having a carbon content (daf) of 60% or more and less than 95% used as a starting material for producing ashless coal include those having the following characteristics, for example. It is preferable to use it.
  • the volatile content of the non-caking coal or the like is preferably 30% or more, more preferably 32% or more, preferably 40% or less, more preferably 36% or less.
  • the average reflectance of the non-caking coal or the like is preferably 0.6 or more, more preferably 0.8 or more, preferably 1.0 or less, more preferably 0.9 or less.
  • the total inert such as non-caking coal is preferably 5% or more, more preferably 15% or more, preferably 35% or less, more preferably 20% or less.
  • the Gieseler maximum fluidity (logMFD) such as non-coking coal is preferably 3.O (logddpm) or more, more preferably 3.3 (logddpm) or more, preferably 4.5 (logddpm) or less, more Preferably it is 3.6 (logddpm) or less.
  • Volatile content is measured by the method stipulated in JIS M8812.
  • Average reflectance is measured by the method stipulated by JIS M8816. it can.
  • Total Inner HTI is calculated from the following formula using the ratio of semi-Fujinit and the group of fine-textured components (maceral * group) in the analysis value of coal micro-structural components (maceral) of JIS M8816. Can be calculated.
  • MM mineral matter
  • A ash (anhydrous base, measured according to JIS M8812)
  • S total sulfur (anhydrous base, measured according to JIS M8813).
  • the ashless coal of 1 part by mass or less, more preferably 0.7 parts by mass or less, and further preferably 0.5 parts by mass or less with respect to 100 parts by mass of the blended coal described later. It is preferable to use raw coal containing
  • the lower limit of the content of ashless coal is not particularly limited, but is preferably 0.2 parts by mass or more.
  • the blended coal has a carbon content (daf) of 85% to 91%, and carbon content.
  • a carbon content (daf) of 85% to 91% there is no particular limitation as long as it contains coal with a rate (daf) of 60% or more and less than 85%.
  • the coal having a carbon content (daf) of 60% or more and less than 85% more preferable one is weakly caking coal, non-caking coal having a carbon content (daf) of 78% or more and less than 83%, or Mention may be made of these mixtures.
  • a combination of coal with a carbon content (daf) of 85% or more and 91% or less and coal with a carbon content (daf) of 60% or more and less than 85% is, for example, strongly caking coal and weak coal. Examples include an embodiment composed of caking coal, an embodiment composed of strong caking coal and non-caking coal, an embodiment consisting of strong caking coal, weak caking coal and non-caking coal, and the like.
  • Coal having a carbon content (daf) of 85% or more and 91% or less in blended coal is blended in order to increase the resulting coatus strength, and the blending amount thereof is When the total blended coal is 100 parts by mass, 10 parts by mass or more is preferable, and 40 parts by mass or more is more preferable. If the amount of strong caking coal is less than 10 parts by mass, the caking component is too short, so even if 1 mass part or less of ashless coal is added to 100 parts by mass of coal blend, it is desirable. In some cases, it may not be possible to obtain the coust strength.
  • the upper limit of the amount of strong caking coal is not particularly limited, but 100 parts by mass is preferable, 90 parts by mass is more preferable, 60 parts by mass, and force S is more preferable. If the amount of strong caking coal is increased too much, the raw material cost during the production of coatus will increase.
  • coal with a carbon content (daf) of 60% or more and less than 85% (non-caking coal, etc.) is preferably blended so that the total blending amount with strong caking coal is 100 parts by mass. .
  • the blended coal obtained by blending strongly caking coal and non-caking coal or the like preferably has the following characteristics.
  • the volatile content of the blended coal is preferably 15% or more, more preferably 26% or more, preferably 35% or less, more preferably 29% or less.
  • the average reflectance of the blended coal is preferably 0.65 or more, more preferably 1.00 or more, preferably 1.60 or less, more preferably 1.10 or less.
  • the total inertness of the blended coal is preferably 15% or more, more preferably 20% or more, preferably 35% or less, more preferably 23% or less.
  • the coalescer maximum fluidity (logMFD) of the blended coal is preferably 0.7 (logddpm) or more, more preferably 2.
  • the granular composition of the blended coal is 3 mm or less, preferably 50% or more, more preferably 75% or more. Preferably, it is 90% or less, more preferably 85% or less.
  • the wide numerical range of each characteristic is a suitable range that can be used as a raw material for blast furnace coatas. By making each of the characteristics within a narrower numerical range, it is possible to substantially reduce the strength of the coatus. Is obtained.
  • the method for producing the coatus of the present invention is a blended coal containing coal having a carbon content (daf) of 85% to 91% and coal having a carbon content (daf) of 60% to less than 85%. Coking coal containing 1 part by mass or less of coal containing substantially no ash with respect to 100 parts by mass is dry-distilled.
  • the conditions for the carbonization are not particularly limited, and normal carbonization conditions in the production of Cotas using a coke oven can be adopted.
  • the conditions are 950 ° C or higher, more preferably 1000 ° C or higher. It is preferable to dry distillation at a temperature of 1200 ° C. or lower, more preferably 1050 ° C. or lower, for 8 hours or longer, more preferably 10 hours or longer, more preferably 24 hours or shorter, more preferably 20 hours or shorter.
  • the present invention includes a pig iron production method characterized by using the coatus obtained by the coatus production method of the present invention. Since the coatus obtained by the production method of the present invention is excellent in strength, it can be suitably used for producing pig iron in a blast furnace. That is, if the coatus obtained by the manufacturing method of the present invention is used, the gas permeability during the pig iron production in the blast furnace is improved.
  • a method for producing pig iron in the blast furnace a known method may be adopted.For example, iron ore and coatus are alternately laminated in a blast furnace in layers, and hot air is blown from the lower part of the blast furnace, and fine powder as required. The method of blowing charcoal can be mentioned.
  • ashless coal was added to the blended coal to prepare raw coal.
  • a soluble component ash content 600 ppm
  • the ashless coal was prepared by the following method using the apparatus shown in FIG. Australian caking coal (carbon content (da f) 84%)
  • the resulting slurry is preheated in 3
  • soluble components were extracted from Australian caking coal in the extraction tank 4.
  • the slurry after the extraction treatment is supplied to the gravity sedimentation tank 5 at a flow rate of 15 kgZh, subjected to gravity sedimentation, separated into a supernatant and a solid phase component concentrate, and the supernatant is supplied to the filter unit 8 at a flow rate of 3 kgZh.
  • the solid phase component concentrate was discharged from the bottom of the gravity sedimentation tank 5 to the solid phase component concentrate receiver 6 at a flow rate of 12 kgZh.
  • the supernatant liquid was filtered through the filter unit 8 and then collected in the supernatant liquid receiver 9, and the recovered liquid organic solvent was removed by evaporation by a spray drying method to obtain ashless coal (ash content: 600 ppm).
  • the coking coal was filled into a can container having a size of 378 mm in width X 121 mm in length X 114 mm in height so as to have a desired density (720 kgZm 3 and 780 kgZm 3 ).
  • Four of these cans are placed in a steel retort (size: width 380mm x length 430mm x height 350mm), and the retort is placed in a double-sided electric furnace that can heat the cans in the width direction.
  • the raw coal was carbonized. Dry distillation was performed at 1000 ° C for 10 hours, after which the retort was removed from the electric furnace and allowed to cool naturally over about 16 hours.
  • the sized Kotas was washed with distilled water to remove the Kotas fine powder adhering during sizing (at the time of cutting), and dried with a dryer at 150 ° C ⁇ 2 ° C. If the packing density of the coking coal is 78 OkgZm 3 so that the total weight of the sized granule after drying is 200 g, select 12, 12, or 11 in order of head, body, and tail force. If the packing density of the coal is 720KgZm 3, head, body, turn 12 is also the tail force, 13, and 11 selected to obtain a sample for strength measurement. [0031] Using the obtained strength measurement sample, the type I strength was measured.
  • a cylindrical container made of SUS (length: 720 mm, circular bottom diameter: 132 mm) was used as the equipment for the I-type strength test, and 200 g of the sample was placed in this container, and 20 times per minute. Rotating at a rotational speed of 30 minutes for 30 minutes, impact was applied by a total of 600 rotational movements.
  • This cylinder was rotated by setting a rotation axis at 360 mm, which is the middle of the cylinder length of 720 mm, and rotating the cylinder around this rotation axis so that the bottom of the cylinder draws a circle with a diameter of 720 mm.
  • the cylindrical container force was also taken out and divided by a 9.5 mm sieve to measure the mass on the sieve. At this time, the mass that was applied to the sieve was measured as the mass on the sieve.
  • the type I strength index was calculated as follows, and the results are shown in Table 1.
  • Type I strength index 1 6 °° 100 X 9.5 mm Mass on screen (unit: g) / 200 g
  • the rotational strength of the coatus can be divided into one that evaluates the volume fracture in which the coatus mass breaks as a large mass and one that evaluates the surface fracture due to surface abrasion. Mold strength index 1 6
  • 9.5 is interpreted as an index used to assess surface fracture.
  • Cortus No. 12 is a case where the ratio of the strong caking coal is lower than that of Cortus No. 8, and it can be seen that the resulting Kotas strength is reduced. However, the strength of the coatus was improved by adding 0.5 parts by mass of ashless coal (coatus No. 13).
  • the present invention can be suitably applied to the production of coatas and further to the production of pig iron in a blast furnace.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Manufacturing & Machinery (AREA)
  • Metallurgy (AREA)
  • Coke Industry (AREA)
  • Solid Fuels And Fuel-Associated Substances (AREA)

Abstract

La présente invention fournit une technique de substitution d’un charbon de reformage semi ou non agglomérant à la place d’un charbon fortement agglomérant servant de charbon à coke de façon à augmenter la résistance du coke ou de façon à réduire la quantité de charbon fortement agglomérant de valeur utilisé, la résistance du coke restant à un niveau classique. L'invention est caractérisée par l’utilisation d’une quantité prédéfinie d'un charbon sensiblement dépourvu de cendre obtenu par le reformage d’un charbon ayant une teneur en matière carbonée (eau et cendres exclues) supérieure ou égale à 60 % mais inférieure à 95 % en tant que produit de remplacement pour un charbon fortement agglomérant utilisé en tant que charbon à coke.
PCT/JP2006/310578 2005-07-19 2006-05-26 Procédé de production de coke et procédé de production de fonte en gueuse Ceased WO2007010674A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN200680026729XA CN101233211B (zh) 2005-07-19 2006-05-26 焦炭的制造方法及生铁的制造方法
KR1020087003871A KR101129061B1 (ko) 2005-07-19 2006-05-26 코크스의 제조 방법 및 선철의 제조 방법

Applications Claiming Priority (2)

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JP2005209042A JP4109686B2 (ja) 2005-07-19 2005-07-19 コークスの製造方法、及び、銑鉄の製造方法
JP2005-209042 2005-07-19

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WO2007010674A1 true WO2007010674A1 (fr) 2007-01-25

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JP (1) JP4109686B2 (fr)
KR (1) KR101129061B1 (fr)
CN (1) CN101233211B (fr)
TW (1) TW200710212A (fr)
WO (1) WO2007010674A1 (fr)

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WO2007105682A1 (fr) * 2006-03-15 2007-09-20 Kabushiki Kaisha Kobe Seiko Sho Procede de fabrication de coke et procede de fabrication de fonte en gueuse
CN101531907B (zh) * 2008-03-10 2012-10-03 株式会社神户制钢所 焦炭的制造方法
CN101531940B (zh) * 2008-03-11 2013-04-10 株式会社神户制钢所 焦炭制造用原料煤的制造方法,焦炭的制造方法和生铁的制造方法

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JP5143433B2 (ja) * 2007-01-17 2013-02-13 株式会社神戸製鋼所 コークスの製造方法、及び、銑鉄の製造方法
JP5118388B2 (ja) * 2007-05-23 2013-01-16 株式会社神戸製鋼所 カーボンブラックの製造方法
JP5247193B2 (ja) * 2008-03-17 2013-07-24 株式会社神戸製鋼所 コークスの製造方法、及び、銑鉄の製造方法
KR101032276B1 (ko) * 2009-08-28 2011-05-06 한국에너지기술연구원 탈황공정을 포함한 청정석탄의 제조 방법
CN102241992A (zh) * 2010-05-14 2011-11-16 湖南省醴陵市马恋耐火泥有限公司 7.63米焦炉的改造方法
JP5530292B2 (ja) * 2010-07-28 2014-06-25 株式会社神戸製鋼所 製鉄用コークスの製造方法
CN102453490B (zh) * 2010-10-22 2013-09-25 宝山钢铁股份有限公司 一种制备高活性高强度焦炭的配煤方法
WO2013099650A1 (fr) * 2011-12-28 2013-07-04 株式会社神戸製鋼所 Procédé de production de charbon sans cendre
JP5722208B2 (ja) * 2011-12-28 2015-05-20 株式会社神戸製鋼所 無灰炭の製造方法
CN105073954B (zh) * 2013-02-21 2017-05-24 杰富意钢铁株式会社 冶金用焦炭的制造方法
JP6266409B2 (ja) * 2014-03-31 2018-01-24 株式会社神戸製鋼所 石炭混合材
JP6297412B2 (ja) * 2014-05-27 2018-03-20 株式会社神戸製鋼所 無灰炭の製造装置及び無灰炭の製造方法
WO2016024513A1 (fr) * 2014-08-15 2016-02-18 Ｊｆｅスチール株式会社 Coke métallurgique et son procédé de production
JP6424152B2 (ja) * 2015-11-24 2018-11-14 株式会社神戸製鋼所 炭素繊維製造用原料ピッチの製造方法
JP2018178284A (ja) * 2017-04-07 2018-11-15 株式会社神戸製鋼所 多孔質炭素繊維シートの製造方法及び多孔質炭素電極の製造方法
CN107903971B (zh) * 2017-11-28 2021-03-05 北京科技大学 一种基于hpc的型煤制造方法

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WO2007105682A1 (fr) * 2006-03-15 2007-09-20 Kabushiki Kaisha Kobe Seiko Sho Procede de fabrication de coke et procede de fabrication de fonte en gueuse
CN101531907B (zh) * 2008-03-10 2012-10-03 株式会社神户制钢所 焦炭的制造方法
CN101531940B (zh) * 2008-03-11 2013-04-10 株式会社神户制钢所 焦炭制造用原料煤的制造方法,焦炭的制造方法和生铁的制造方法

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JP2007023190A (ja) 2007-02-01
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JP4109686B2 (ja) 2008-07-02
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