WO2024202185A1 - コークスの製造方法 - Google Patents
コークスの製造方法 Download PDFInfo
- Publication number
- WO2024202185A1 WO2024202185A1 PCT/JP2023/040108 JP2023040108W WO2024202185A1 WO 2024202185 A1 WO2024202185 A1 WO 2024202185A1 JP 2023040108 W JP2023040108 W JP 2023040108W WO 2024202185 A1 WO2024202185 A1 WO 2024202185A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- coal
- coke
- briquettes
- mixture
- blend
- 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.)
- Pending
Links
Images
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
Definitions
- the present invention relates to a method for producing coke, in which a portion of the raw coal is carbonized into briquettes, and to a method for adjusting the composition of the raw materials in the briquettes.
- Blast furnace coke is used in the blast furnace as a reducing agent, a heat source, and a support material to maintain air permeability and liquid permeability.
- air permeability and liquid permeability which requires coke with excellent properties such as strength, particle size, and post-reaction strength.
- coke strength such as rotational strength, is a particularly important property for blast furnace coke.
- Blast furnace coke is produced by carbonizing coal in a carbonization furnace to soften and melt the coal and bond it together. For this reason, in order to produce high-strength coke, caking coal with excellent softening and melting properties is required.
- caking coal suitable for producing coke has been depleted. Therefore, there is a demand for expanding the use of coal with poor softening and melting properties that has not been used in coke production so far, and carbon materials other than coal.
- Carbon materials other than coal include biomass such as wood pellets and oil palm residue, semi-carbonized biomass obtained by torrefaction of biomass, biomass carbon material obtained by heat treatment of biomass, plastics, etc.
- there has been an increasing need to reduce CO2 emissions so there is a demand for using carbon materials derived from biomass and waste plastics in the production of coke.
- Patent Document 1 discloses a coal blending method and coke production method that use surface tension and interfacial tension calculated from the surface tension.
- the interfacial tension generated between different coal particles is calculated based on the surface tension of heat-treated coal (semi-coke) obtained by heat treating coal (hereinafter referred to as the surface tension of coal), and the coal blend is managed based on the magnitude of this interfacial tension.
- Coke is produced by carbonizing coal, softening and melting it, and fusing it together. For this reason, it is believed that the adhesive strength between coal particles affects the coke strength of the coke produced. In general, the adhesive strength between coal particles increases as the interfacial tension of the adhesive interface decreases. Since the unit of interfacial tension is mN/m, it can be thought of as the free energy present at the interface. In other words, the existence of interfacial tension means that there is free energy at the interface that can act as a force. For this reason, it is believed that when the interfacial tension is high, destruction at the adhesive interface is more likely to occur.
- Patent Document 1 states that in order to obtain high-strength coke, it is preferable to blend the various coals so that the interfacial tension of the coal blend is small. Therefore, in order to produce high-strength coke, it is effective to use coals with similar surface tension values in the coal blend. However, this method makes it difficult to use coals with too high or too low surface tensions. Patent Document 1 does not disclose a method for preventing a decrease in coke strength when using coal or carbon materials with surface tensions that are significantly different from the weighted average surface tensions of the coals and carbon materials contained in the coal blend, and there is an issue that the range of usable coal resources is limited.
- coal or carbon materials whose surface tension is greater than the average surface tension of the coal blend, or coal or carbon materials whose surface tension is too low will be referred to as carbon materials with abnormal surface tension.
- the present invention was made in consideration of these circumstances, and its purpose is to provide a coke manufacturing method that can suppress a decrease in the coke strength of the produced coke, even when producing coke using a coal blend that contains carbonaceous material with abnormal surface tension.
- FIG. 1 is a graph showing the relationship between the interfacial tension ⁇ p of the powder coal mixtures of Examples 1 to 3 and Comparative Examples 2 and 3 and the coke strength.
- FIG. 2 is a graph showing the relationship between the interfacial tension ⁇ p of the powder coal mixtures of Examples 4 to 7 and Comparative Examples 5 and 6 and the increase in coke strength.
- Patent Document 1 shows that for a coal blend that does not contain briquettes, there is a suitable upper limit for the interfacial tension of the coal blend.
- a briquettes particles of coal, etc. are arranged closer to each other than in powdered coal, and adhesion between particles is more likely to occur than in powdered coal, so that the suitable upper limit for this interfacial tension may change when a briquettes is used.
- the inventors have confirmed that the effect of the interfacial tension of the coal contained in the briquettes on the coke strength is less than that of the interfacial tension of the coal contained in the powdered coal.
- the effect of the interfacial tension of the powdered coal mixture becomes dominant, and as a result, it has been found that it is possible to suppress the decrease in coke strength caused by blending a carbonaceous material with abnormal surface tension into the coal blend.
- the interfacial tension of the entire coal blend is high, if the interfacial tension of the powdered coal mixture is reduced by blending a large amount of a carbonaceous material with abnormal surface tension into the briquettes, the interfacial tension of the powdered coal mixture becomes dominant, and the present invention has been completed based on the discovery that the decrease in coke strength of the coke produced by carbonizing the coal blend is suppressed.
- the present invention will be described in detail below through the embodiments of the present invention.
- Known methods for measuring the surface tension of coal and carbon materials include the sessile drop method, capillary rise method, maximum bubble pressure method, liquid weight method, hanging drop method, ring method, plate method, expansion/contraction method, sliding method, and film flotation method.
- Coal is composed of various molecular structures, so it is expected that its surface tension is not uniform. For this reason, it is preferable to use a method that can evaluate the distribution of surface tension, such as the film flotation method described in Non-Patent Document 1.
- the film flotation method can be similarly applied to coal, carbon materials, and semi-coke obtained by carbonizing these, and the distribution of surface tension can be obtained using a finely pulverized coal sample. The average value of the obtained surface tension distribution can be used as the surface tension of the coal sample.
- the heat treatment temperature for the coal sample is preferably within the range of 350°C to 800°C, which corresponds to the temperature at which coal begins to soften and melt, and adheres and solidifies to complete coking.
- the coal sample is preferably heated in an inert gas atmosphere, such as nitrogen, argon, or helium, which does not react with coal or carbon materials.
- the heating rate is preferably determined according to the heating rate used when producing coke in a coke oven, and may be, for example, a heating rate of 3°C/min.
- the sample heated to the target temperature is preferably rapidly cooled at a cooling rate of 10°C/sec or more in order to maintain the molecular structure at the target temperature, and the preferred cooling method is to cool it in liquid nitrogen.
- the surface tension may be measured without prior heat treatment if the carbonization temperature exceeds the heat treatment temperature of coal.
- a part of the blended coal charged into the coke oven is made into briquettes.
- Briquettes can be made by methods such as granulation, pressing, molding, adhesion, and kneading, and these methods may be combined to make briquettes.
- a briquette is a briquette (briquetted coal) made by mixing multiple coals and carbon materials, adding a binder as necessary, kneading the mixture in a kneader, and then compacting and molding the mixture in a double-roll molding machine.
- binders examples include water, coal-based binders (coal tar pitch, solvent refined coal, tar, tar slag, etc.), petroleum-based binders (asphalt, asphalt pitch, propane deasphalted asphalt, etc.), and organic binders (starch, molasses, synthetic polymer compounds, resins, etc.).
- the particle size of the coal used for briquettes is preferably adjusted by crushing so that the ratio of particles of 3 mm or less is 70 to 100% by mass.
- the bulk density of the shaped product is preferably 0.8 g/ cm3 or more, more preferably 0.9 g/cm3 or more , and even more preferably 1.0 g/cm3 or more .
- the powdered coal mixture In the coke manufacturing method according to this embodiment, the portion of the blended coal charged into the coke oven other than the briquettes is referred to as the powdered coal mixture. It is preferable that the coal constituting the powdered coal mixture is also pulverized and adjusted in particle size so that the ratio of particles of 3 mm or less is 70 to 100 mass%. In addition, before charging into the coke oven, the moisture content may be adjusted by adjusting the humidity and drying. A carbon material may be blended into the powdered coal mixture.
- the composition of the briquettes and powdered coal mixture is determined based on the interfacial tension calculated from the surface tension.
- the interfacial tension can be calculated based on the method described in Patent Document 1, and an overview of the method for measuring the interfacial tension is provided below.
- the interfacial tension between coal particles can be calculated using the surface tension of each coal or carbon material that makes up the blended coal, the blending ratio, and the following formula (1).
- the surface tension of each heat-treated coal is that of heat-treated coal heated to the same temperature.
- the blending ratio w i of coal i is the ratio of the mass of each brand (coal i ) contained in the coal blend to the total mass of the coal blend.
- the interfacial tension between two different brands can be calculated using the following formula (5).
- ⁇ is a constant, and Li and Neumann set the value of ⁇ to 0.0001247 [(m 2 ⁇ mJ) 2 ].
- the blending ratio may be calculated based on the ratio in the heat treatment taking into account the difference in yield of each coal during heat treatment, but there is no significant difference in determining the blending composition whether it is calculated based on the blending ratio in the coal blend or based on the ratio in the heat-treated product.
- the interfacial tension ⁇ p of the powder coal mixture (the remainder after removing the briquettes from the coal blend) can also be calculated by the above formula (1) once the individual coal brands present in the powder coal mixture and their blending ratios are determined.
- the interfacial tension of a coal blend can also be calculated using the following formula (2). It has been shown in Patent Document 1 that the results of calculations using the above formula (1) and the following formula (2) match.
- the following formulas (3) and (4) are extensions of the above formulas (1) and (2) for calculating the interfacial tension of a coal blend so that it contains carbon materials.
- the calculation principles of the following formulas (3) and (4) are the same as those of the above formulas (1) and (2).
- the interfacial tension of a coal blend containing carbon materials can be calculated using the following formulas (3) and (4).
- the blending composition of the briquettes and the powder coal mixture is determined so that the interfacial tension ⁇ p of the powder coal mixture is smaller than the interfacial tension ⁇ inter of the entire coal blend and is less than 0.03.
- the blending composition refers to the brand and blending ratio of the blended coal and the type and blending ratio of the blended carbon material.
- the blending ratio of a certain coal brand in a coal blend is the sum of the blending ratio of the briquettes of the coal blend multiplied by the blending ratio of the coal brands in the briquettes, and the blending ratio of the powder coal mixture in the coal blend multiplied by the blending ratio of the coal brands in the powder coal mixture. Therefore, for example, if the blending composition of the coal blend is determined, and the blending ratio of the briquettes of the coal blend and the blending ratio of the coal brands in the briquettes are determined, the blending ratio of the powder coal mixture is also determined.
- the inventors found that the effect of the interfacial tension of the briquettes on coke strength is less than the effect of the interfacial tension in the powdered coal mixture, and that when a carbonaceous material with abnormal surface tension is blended into the briquettes, the effect of the interfacial tension in the powdered coal mixture becomes dominant.
- ⁇ inter > ⁇ p indicates that the present invention is suitable for application to a coal blend with a high ⁇ inter that is likely to cause a decrease in coke strength.
- the content of the briquettes in the entire coal blend is within the range of 10% by mass to 50% by mass. If the briquettes are less than 10% by mass of the entire coal blend, the effect of expanding the range of usable coal resources will be small, which is not preferable. Also, if the briquettes are more than 50% by mass of the entire coal blend, the cost of molding the briquettes will increase, which is not preferable. It is even more preferable that the blending ratio of the briquettes is within the range of 15% by mass to 40% by mass of the entire coal blend.
- the fluidity of the raw materials for the briquettes if the fluidity of the raw materials for the briquettes is too low, this may not be desirable as it will result in many defects in the briquettes-derived parts of the coke produced.
- the lower limit of the fluidity of the raw materials for the briquettes varies depending on the blending amount of the briquettes and the composition of the coal and carbon materials used in the briquettes, but it is preferable that the average log MF, based on the content of each coal and carbon material in the briquettes as the common logarithm of the Gieseler fluidity MF of each coal and carbon material blended in the briquettes, is 1.4 or more.
- blended coal produced by mixing the briquettes and the powdered coal mixture, is charged into a coke oven and carbonized to produce coke.
- the carbonization of blended coal can be carried out at a temperature of approximately 900°C or higher using a typical chamber-type coke oven.
- coals are coals
- I is biomass (palm kernel shell) carbonized at 500°C.
- coal A and carbon material I have a higher surface tension ⁇ than the average for the entire coal blend, and in this blend, coal A and carbon material I can be said to be carbon materials with abnormal surface tension.
- Ro is the average maximum reflectance of the vitrinite of the coal measured according to JIS M8816:1992.
- logMF is the common logarithm of the maximum Gieseler fluidity of the coal measured according to JIS M8801:2008.
- the maximum fluidity MF of I was 0 ddpm.
- ⁇ is the surface tension of the heat-treated coal or carbon material heat-treated at 500°C, and is the average value of the surface tension distribution obtained using the film flotation method described in Patent Document 1.
- a coal blend containing a briquette and a powdered coal mixture was prepared using multiple brands of coal listed in Table 1. Each coal was pulverized so that the ratio of particles of 3 mm or less was 100 mass%.
- the briquette was produced by adding 4.0 parts and 6.5 parts of tar pitch and tar slag, respectively, as binders to 100 parts of the raw material for the briquette, and mixing them, and then producing briquette with a volume of 34 cm3 using a double roll molding machine.
- the briquettes were blended with the unbriquetted pulverized coal mixture to prepare a coal blend.
- the blended coal was filled into a carbonization can so that the bulk density was 870 kg/ m3 , and then carbonized for 6 hours in an electric furnace with a furnace wall temperature of 1050°C, followed by cooling under nitrogen to produce coke.
- the coal blending composition (mass % relative to the total coal blend), the interfacial tension of the briquettes or the pulverized coal mixture, the average logMF, and the coke strength DI (150/15) of the produced coke are shown in Table 2 below.
- the interfacial tension is a value calculated using the surface tension, blending ratio, and formula (2) of each coal.
- the average logMF is a value calculated by weighting the logMF of each coal with the blending ratio of each coal.
- the coke strength is the drum strength index DI (150/15) measured by the rotational strength test method specified in JIS K2151:2004.
- Comparative Example 1 is an example in which the briquettes and the powdered coal mixture are in the same blend. Therefore, the interfacial tension in this example is the interfacial tension ⁇ inter of the coal blend.
- the briquettes and the powdered coal mixture have different blending compositions, and the interfacial tension and average logMF values are shown for each blending composition.
- the blending ratio of the briquettes in the coal blend is the total blending ratio of each coal brand blended in the briquettes, and is adjusted to be within the range of 30% by mass to 35% by mass. In the case of the same blending as Comparative Example 1, the blending ratio of the briquettes is 30% by mass.
- Fig. 1 is a graph showing the relationship between the interfacial tension ⁇ p and coke strength of the powder coal mixtures of Examples 1 to 3 and Comparative Examples 2 and 3.
- the horizontal axis of Fig. 1 is the interfacial tension ⁇ p (mN/m) of the powder coal mixture, and the vertical axis is the coke strength DI (150/15) (-). Note that (-) means that the value is dimensionless.
- the dashed line in Fig. 1 shows the coke strength of Comparative Example 1.
- the blending of the briquettes and the powder coal mixture was different, it was considered that not only the interfacial tension of the powder coal mixture but also the adhesion in the briquettes or at the boundary between the briquettes and the powder coal mixture could become a problem.
- FIG. 1 the results of FIG.
- a coke with high strength can be obtained by determining the blending composition of the briquettes and the powder coal mixture so as to satisfy ⁇ inter > ⁇ p and ⁇ p ⁇ 0.03.
- the blending composition of the briquettes and the powder coal mixture can be determined, for example, by determining the blending composition of the entire coal blend in advance, and then determining the blending composition of the briquettes and the powder coal mixture without changing the blending composition of the entire coal blend.
- the ⁇ p of the powder coal mixture becomes smaller, and thus a blending composition that satisfies ⁇ inter > ⁇ p and ⁇ p ⁇ 0.03 can be obtained.
- Invention Examples 4 to 7 are examples of coke production using a coal blend made by blending multiple brands of coal with a carbon material. Conditions other than the blend composition are the same as those of Invention Examples 1 to 3. Biomass carbonized at 500°C was used as the carbon material. The properties of the biomass are shown in Brand I in Table 1. The blend composition, interfacial tension of the molded product or powder coal mixture, average logMF, coke strength DI (150/15) and coke strength increase ⁇ DI (150/15) of the produced coke for Invention Examples 4 to 7 are shown in Tables 3 and 4 below.
- Inventive Examples 4 and 5 and Comparative Examples 4 to 6 are examples of producing coke using a coal blend containing 3 mass% of carbon material I.
- Inventive Examples 6 and 7 and Comparative Example 7 are examples of producing coke using a coal blend containing 5 mass% of carbon material I.
- Comparative Examples 4 and 7 are examples in which the briquettes and the powdered coal mixture are the same blend.
- the interfacial tensions of Comparative Examples 4 and 7 are the interfacial tensions ⁇ inter of the coal blend. Since the coke strengths of the cokes produced in Comparative Examples 4 and 7 were different, ⁇ DIs of each of the inventive examples and comparative examples are shown.
- ⁇ DI is the coke strength increase amount, and in Table 3, it is the value obtained by subtracting the coke strength of Comparative Example 4 from the coke strengths of Inventive Examples 4 and 5 and Comparative Examples 5 and 6, and in Table 4, it is the value obtained by subtracting the coke strength of Comparative Example 7 from the coke strengths of Inventive Examples 6 and 7.
- the average logMF in Tables 3 and 4 was calculated by setting the logMF of carbon material I to 0.
- Fig. 2 is a graph showing the relationship between the interfacial tension ⁇ p and the coke strength increase of the powder coal mixtures of Examples 4 to 7 and Comparative Examples 5 and 6.
- the horizontal axis is the interfacial tension ⁇ p (mN/m) of the powder coal mixture, and the vertical axis is the coke strength increase ⁇ DI (150/15) (-).
- black circles indicate the results in Table 3
- white circles indicate the results in Table 4.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Coke Industry (AREA)
Abstract
Description
[1]複数銘柄の石炭を含む成型物と、複数銘柄の粉状の石炭を含む粉炭混合物とを配合して得られる配合炭を乾留してコークスを製造するコークスの製造方法であって、前記配合炭に含まれる各銘柄の石炭を熱処理して得られる熱処理石炭の表面張力と、前記各銘柄の石炭の配合率と、下記(1)式または下記(2)式と、を用いて算出される配合炭の界面張力γinterおよび粉炭混合物の界面張力γpが、γinter>γpかつγp<0.03を満たすように、前記成型物および前記粉炭混合物に配合する石炭の銘柄および配合率を決定する、コークスの製造方法。
[2]前記成型物および前記粉炭混合物の少なくとも一方に炭素材料を配合し、前記配合炭に含まれる各銘柄の石炭を熱処理して得られる熱処理石炭および前記炭素材料の表面張力と、前記各銘柄の石炭および前記炭素材料の配合率と、前記(1)、(2)式に代えて下記の(3)式または(4)式とを用いて算出される配合炭の界面張力γiterおよび粉炭混合物の界面張力γpが、γinter>γpかつγp<0.03を満たすように、前記成型物および前記粉炭混合物に配合する石炭の銘柄および配合率と、前記成型物および前記粉炭混合物に配合する前記炭素材料の種類および配合率を決定する、[1]に記載のコークスの製造方法。
Claims (2)
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2024508316A JP7493121B1 (ja) | 2023-03-28 | 2023-11-07 | コークスの製造方法 |
| EP23930814.1A EP4660282A1 (en) | 2023-03-28 | 2023-11-07 | Coke production method |
| AU2023439175A AU2023439175A1 (en) | 2023-03-28 | 2023-11-07 | Method for producing coke |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2023-051469 | 2023-03-28 | ||
| JP2023051469 | 2023-03-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2024202185A1 true WO2024202185A1 (ja) | 2024-10-03 |
Family
ID=92903791
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2023/040108 Pending WO2024202185A1 (ja) | 2023-03-28 | 2023-11-07 | コークスの製造方法 |
Country Status (1)
| Country | Link |
|---|---|
| WO (1) | WO2024202185A1 (ja) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08176553A (ja) * | 1994-12-22 | 1996-07-09 | Kawasaki Steel Corp | 非・微粘結炭の流動性等推定方法 |
| JP2005281355A (ja) * | 2004-03-29 | 2005-10-13 | Jfe Steel Kk | 配合炭のコークス強度推定方法及びコークスの製造方法 |
| WO2013054526A1 (ja) * | 2011-10-14 | 2013-04-18 | Jfeスチール株式会社 | コークスの製造方法 |
| JP2018168279A (ja) * | 2017-03-30 | 2018-11-01 | Jfeスチール株式会社 | コークスの製造方法 |
-
2023
- 2023-11-07 WO PCT/JP2023/040108 patent/WO2024202185A1/ja active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08176553A (ja) * | 1994-12-22 | 1996-07-09 | Kawasaki Steel Corp | 非・微粘結炭の流動性等推定方法 |
| JP2005281355A (ja) * | 2004-03-29 | 2005-10-13 | Jfe Steel Kk | 配合炭のコークス強度推定方法及びコークスの製造方法 |
| WO2013054526A1 (ja) * | 2011-10-14 | 2013-04-18 | Jfeスチール株式会社 | コークスの製造方法 |
| JP2018168279A (ja) * | 2017-03-30 | 2018-11-01 | Jfeスチール株式会社 | コークスの製造方法 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5752993A (en) | Blast furnace fuel from reclaimed carbonaceous materials and related methods | |
| KR100866166B1 (ko) | 고로용 코크스의 제조 방법 | |
| JP3027084B2 (ja) | 冶金用成形コークスの製造方法 | |
| KR101456449B1 (ko) | 코크스 제조 방법 | |
| JP4893136B2 (ja) | 木質バイオマスを原料とした高炉操業方法 | |
| JP2012017528A (ja) | 木質バイオマスを原料とした高炉操業方法およびコークスの製造方法 | |
| JPH0665579A (ja) | 冶金用成型コークス製造のための成型炭の原料配合方法 | |
| WO2014007184A1 (ja) | コークスおよびその製造方法 | |
| JP7493121B1 (ja) | コークスの製造方法 | |
| WO2024202185A1 (ja) | コークスの製造方法 | |
| CN104884588B (zh) | 型煤制造方法及型煤制造装置 | |
| JP6227482B2 (ja) | 高炉用コークスの製造方法及び高炉用コークス | |
| KR102288801B1 (ko) | 코크스 제조방법 | |
| US4272324A (en) | Process for producing shaft furnace cokes | |
| JP5394695B2 (ja) | 低石炭化度の非微粘結炭の改質方法、非微粘結炭を改質する成型物及びコークスの製造方法 | |
| Lu | Utilization parameters of coal for metallurgical applications | |
| US2732333A (en) | Graphite containing metallurgical | |
| JP7666369B2 (ja) | 冶金用コークスの製造方法 | |
| JP4695244B2 (ja) | コークス製造方法 | |
| KR101503443B1 (ko) | 코크스용 조성물 및 코크스 제조 방법 | |
| US2530459A (en) | Carbon supplying composition | |
| JPH0218359B2 (ja) | ||
| JP2024053917A (ja) | フェロコークス用石炭の評価方法 | |
| JPS6340234B2 (ja) | ||
| JPH08259956A (ja) | 高炉用コークスの製造方法 |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WWE | Wipo information: entry into national phase |
Ref document number: 2024508316 Country of ref document: JP |
|
| 121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 23930814 Country of ref document: EP Kind code of ref document: A1 |
|
| WWE | Wipo information: entry into national phase |
Ref document number: AU2023439175 Country of ref document: AU |
|
| ENP | Entry into the national phase |
Ref document number: 2023439175 Country of ref document: AU Date of ref document: 20231107 Kind code of ref document: A |
|
| WWE | Wipo information: entry into national phase |
Ref document number: 202517089522 Country of ref document: IN |
|
| REG | Reference to national code |
Ref country code: BR Ref legal event code: B01A Ref document number: 112025019937 Country of ref document: BR |
|
| WWP | Wipo information: published in national office |
Ref document number: 202517089522 Country of ref document: IN |
|
| NENP | Non-entry into the national phase |
Ref country code: DE |
|
| WWP | Wipo information: published in national office |
Ref document number: 2023930814 Country of ref document: EP |