JP4714518B2 - Manufacturing method of coal - Google Patents

Manufacturing method of coal Download PDF

Info

Publication number
JP4714518B2
JP4714518B2 JP2005207977A JP2005207977A JP4714518B2 JP 4714518 B2 JP4714518 B2 JP 4714518B2 JP 2005207977 A JP2005207977 A JP 2005207977A JP 2005207977 A JP2005207977 A JP 2005207977A JP 4714518 B2 JP4714518 B2 JP 4714518B2
Authority
JP
Japan
Prior art keywords
coal
kneaded
mass
less
binder
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
Application number
JP2005207977A
Other languages
Japanese (ja)
Other versions
JP2007023170A (en
Inventor
祥充 塚崎
顕 高橋
健輔 山内
Original Assignee
新日本製鐵株式会社
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 新日本製鐵株式会社 filed Critical 新日本製鐵株式会社
Priority to JP2005207977A priority Critical patent/JP4714518B2/en
Publication of JP2007023170A publication Critical patent/JP2007023170A/en
Application granted granted Critical
Publication of JP4714518B2 publication Critical patent/JP4714518B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Description

本発明は、冶金用コークスを製造するに際して、コークス炉に装入するための成型炭の製造方法に関する。   TECHNICAL FIELD The present invention relates to a method for producing a coal for charging into a coke oven when producing metallurgical coke.
コークス製造用原料炭を事前に乾燥加熱してコークス炉に装入することにより、乾留時間の短縮や装入密度の向上を図ることができ、これにより、コークス品質の改善が可能とされている。   Coking coal is dried and heated in advance and charged into the coke oven, shortening the carbonization time and increasing the charging density, which makes it possible to improve coke quality. .
このような方法として、例えば特許文献1に記載された技術のように、コークス炉装入炭を250℃以上、350℃以下に加熱後分級し、粒径が0.3mm以下の微粉炭を350℃以上、450℃以下に加熱して加圧成型し、微粉炭を軟化溶融させて成型する方法がある。   As such a method, for example, as in the technique described in Patent Document 1, the coke oven charging coal is heated to 250 ° C. or more and 350 ° C. or less and classified, and pulverized coal having a particle size of 0.3 mm or less is 350 There is a method of heating to 450 ° C. or higher and press molding, softening and melting pulverized coal, and molding.
特開平09−13042号公報JP 09-13042 A
特許文献1に記載された技術においては、350℃〜450℃における粘結炭の溶融で成型し、バインダーが添加されていないため、成型炭強度が弱い。このため、コークス炉に装入するまでに、成型炭が崩壊し微粉炭が再発生する。この微粉炭が装入されると、微粉炭は石炭から急激に発生する熱分解ガスの流れに随伴して炭化室内を上昇した後、ガス精製工程へ導入される。   In the technique described in Patent Document 1, the strength of the coal is weak because it is molded by melting the caking coal at 350 ° C. to 450 ° C. and no binder is added. For this reason, before charging into the coke oven, the coal coal collapses and pulverized coal is regenerated. When the pulverized coal is charged, the pulverized coal rises in the carbonization chamber in accordance with the flow of the pyrolysis gas rapidly generated from the coal, and is then introduced into the gas purification process.
コークス炉に装入されたこの微粉炭は高温の炭化室内壁表面でカーボン化し、厚いカーボン層を生成することによりコークス炉の押出作業を困難とする。また、ガス精製工程に導入された熱分解ガスからタールを分離するが、そのタール中へ微粉炭が混入することによりタール純度を低下させるため、コークス製造工程に悪影響を与えるという問題があった。   The pulverized coal charged in the coke oven is carbonized on the surface of the high-temperature carbonization chamber wall, forming a thick carbon layer, making the coke oven extrusion difficult. Further, tar is separated from the pyrolysis gas introduced into the gas purification process, but the pulverized coal is mixed into the tar to lower the tar purity, which has a problem of adversely affecting the coke production process.
本発明はこのような問題を解決するために提案されたもので、タール中への微粉炭の混入を防止して、高強度の成型炭を製造することを目的とする。   The present invention has been proposed to solve such a problem, and an object of the present invention is to produce a high-strength coal by preventing the mixture of pulverized coal into tar.
本発明の成型炭の製造方法は、前記課題を解決するためになされたものであり、第1の手段として、加熱した微粉炭にバインダーを添加し混練した後、加圧成型して成型炭を製造する方法において、微粉炭とバインダーの混練後の粒度分布が600μm以上:35mass%〜50mass%、且つ、75μm以下:5mass%〜15mass%としたことを特徴とするものである。   The method for producing a coal char of the present invention has been made in order to solve the above-mentioned problems. As a first means, a binder is added to a heated pulverized coal and kneaded, followed by pressure molding to form the coal char. In the manufacturing method, the particle size distribution after kneading of pulverized coal and a binder is 600 μm or more: 35 mass% to 50 mass%, and 75 μm or less: 5 mass% to 15 mass%.
また、第2の手段として、バインダーを添加する前の微粉炭の温度を、135℃〜170℃としたことを特徴とするものである。   Further, as a second means, the temperature of the pulverized coal before adding the binder is set to 135 ° C. to 170 ° C.
また、第3の手段として、前記した粒度分布を作り込むため、前記加熱した微粉炭と前記バインダーとの混練時間を1〜2分としたことを特徴とするものである。   Further, as a third means, in order to create the above-described particle size distribution, the kneading time of the heated pulverized coal and the binder is set to 1 to 2 minutes.
本発明の成型炭の製造方法によれば、成型炭の強度を向上してコークス炉までの搬送工程で成型炭が崩壊して粉化することを抑制することが可能となるので、コークス炉炭化室内壁表面でのカーボン層生成を抑制しコークス押出負荷を低減することができる。
また、ガス精製工程におけるタール純度の低下を防止できる等、この分野における効果は大きい。
According to the method for producing coking coal of the present invention, it becomes possible to improve the strength of the coking coal and to suppress the collapse and pulverization of the forming coal in the conveying process to the coke oven. Generation of a carbon layer on the interior wall surface can be suppressed and coke extrusion load can be reduced.
In addition, the effect in this field is great, such as the reduction of tar purity in the gas purification process.
本発明者は、コークス製造工程に影響を与えない十分な強度を有する成型炭を製造する方法について、図1に示す成型炭製造設備で製造した成型炭を用いて調査検討した。
この成型炭製造設備は、窒素雰囲気で、0.7mm以下の微分炭を150℃に過熱する加熱機1と、この加熱した微粉炭に流動性を有するコークス製造過程から副生するタールから抽出されるバインダーを添加して混練するパドル羽根を16枚有するパドルミキサー2と、この混練物を平行に設けたロールにより加圧(線圧45kPa)して成型炭を製造するダブルロール式成型機3を有している。
This inventor investigated and examined about the method of manufacturing the coking coal which has sufficient intensity | strength which does not affect a coke manufacturing process, using the coking coal manufactured with the coal forming apparatus shown in FIG.
This coal forming equipment is extracted from a heater 1 that heats differential coal of 0.7 mm or less to 150 ° C. in a nitrogen atmosphere and tar produced as a by-product from the coke production process that has fluidity in this heated pulverized coal. A paddle mixer 2 having 16 paddle blades to which a binder is added and kneaded, and a double roll type molding machine 3 for producing coking charcoal by pressurizing the kneaded material with a roll provided in parallel (linear pressure 45 kPa) Have.
なお、前記バインダーとしては、タール軽油、カルボル油、ナフタリン油、洗浄油等のように、低沸点油が10mass%、クレオソート油、ピレン等の軽質油と前記低沸点油の合計が20mass%、ピッチが65mass%、スラッジが5mass%を含有するものを用いた。   In addition, as the binder, tar gas oil, carbol oil, naphthalene oil, washing oil and the like, low boiling oil is 10 mass%, the total of light oil such as creosote oil and pyrene and the low boiling oil is 20 mass%, A pitch containing 65 mass% and sludge containing 5 mass% were used.
この成型炭製造設備を用いて、パドルミキサー2における混練時間を変えて粒度分布が種々異なる混練物とし、この混練物をダブルロール式成型機で加圧成型して成型炭を製造し、製造した成型炭を強度測定機に装入して、その強度を測定した。この強度測定結果を図2(a)、(b)に示す。   Using this coal forming equipment, the kneading time in the paddle mixer 2 was changed to obtain kneaded materials having different particle size distributions, and this kneaded material was press-molded with a double roll type molding machine to produce the coal. The charcoal was charged into a strength measuring machine and its strength was measured. The intensity measurement results are shown in FIGS. 2 (a) and 2 (b).
なお、前記強度測定は、直径125mmで長さ700mmの円筒形の回転体を水平に設置した測定機を使用した。そして、この回転体内に成型炭を装入するとともに、150℃に加熱した窒素を導入しつつ、回転速度20rpmで3分間回転させて試験を行った後、取出して1mm以上の割合を測定した。   In addition, the intensity | strength measurement used the measuring machine which installed the cylindrical rotary body of diameter 125mm and length 700mm horizontally. And while charging charcoal in this rotary body and introducing nitrogen heated at 150 degreeC and rotating for 3 minutes at 20 rpm, it took out and measured the ratio of 1 mm or more.
図2(a)から明らかなように、粒径600μm以上の混練物が35mass%未満になると成型炭の強度が急激に低下し、同じく600μm以上の混練物がが50mass%超になると強度が急激に低下する。このことから、本発明の成型炭の製造方法では、粒径600μm以上の混練物を35mass%〜50mass%とした。   As is clear from FIG. 2 (a), the strength of the formed coal sharply decreases when the kneaded material having a particle size of 600 μm or more is less than 35 mass%, and the strength rapidly increases when the kneaded material of 600 μm or more exceeds 50 mass%. To drop. From this, in the manufacturing method of the forming charcoal of this invention, the kneaded material with a particle size of 600 micrometers or more was 35 mass%-50 mass%.
また、図2(b)から明らかなように、粒径75μm以下の混練物が5%未満となると、成型炭の強度が急激に低下し、同じく15%超になると強度が急激に低下する。このことから、本発明の成型炭の製造方法では、粒径75μm以下の混練物を5%〜15%とした。   Further, as apparent from FIG. 2 (b), when the kneaded product having a particle size of 75 μm or less is less than 5%, the strength of the coal is rapidly decreased, and when it exceeds 15%, the strength is rapidly decreased. For this reason, in the method for producing coal coal of the present invention, the kneaded product having a particle size of 75 μm or less was made 5% to 15%.
例えば、ダブルロール式成型機で加圧成型して成型炭を製造した際、加圧成型前の微粉炭の嵩密度は0.6t/m3程度で、加圧成型後の成型炭の嵩密度は1.0t/m3程度となり、ある程度の脱気が可能である。 For example, when coal is produced by pressure molding with a double roll molding machine, the bulk density of pulverized coal before pressure molding is about 0.6 t / m 3 , and the bulk density of coal after pressure molding is about 0.6 t / m 3. Is about 1.0 t / m 3 , and a certain amount of deaeration is possible.
しかし、微粉炭の含有気体が多く、嵩密度が低い場合、加圧成型しても十分に気体が脱気されずに成型炭中に気体が残存する。この結果、ダブルロール式成型機での加圧が取り除かれた際に、その気体が膨張するため、成型炭表面に亀裂が生じて成型炭の強度が弱くなる。   However, when the pulverized coal contains a large amount of gas and the bulk density is low, the gas remains in the coal as it is not sufficiently degassed even by pressure molding. As a result, since the gas expands when the pressure in the double roll molding machine is removed, the surface of the coal is cracked and the strength of the coal becomes weak.
このことから、粒径600μm以上および75μm以下の混練物の割合が、本発明の範囲内であれば、混練物の嵩密度が高くなって成型機で加圧成型した際に、成型炭内に残存する気体の圧力が低く、該成型炭の膨張が少なくなって亀裂の発生に至らないものと推定される。   From this, if the ratio of the kneaded product having a particle size of 600 μm or more and 75 μm or less is within the range of the present invention, the bulk density of the kneaded product becomes high and the pressure is molded in the molding machine. It is presumed that the pressure of the remaining gas is low and the expansion of the coal does not occur and cracks do not occur.
つまり、粒径600μm以上の混練物が50mass%超になると、600mm以上の擬似粒子で形成する大きな空隙に入り込む微粉が少なく、大きな空隙が埋まらなくなって嵩密度が急激に低下し、一方、35mass%未満になるとこの粒径以下の擬似粒子が多くなって、小さい空隙が多量に発生して嵩密度が低下することによって、成型炭に亀裂が発生し、強度が弱いものと推定される。   That is, when the kneaded material having a particle size of 600 μm or more exceeds 50 mass%, there are few fine powders entering into the large voids formed by pseudo particles of 600 mm or larger, the large voids are not filled, and the bulk density rapidly decreases, while 35 mass% If it is less than this, the number of pseudo particles less than this particle size increases, and a large amount of small voids are generated to reduce the bulk density. As a result, cracks occur in the coal and it is estimated that the strength is weak.
また、粒径75μm以下の混練物が5mass%未満になると、これ以上の擬似粒子間で形成した空隙に入り込む微粉が少なく、前記と同様に嵩密度が低下する。また、75μm以下の混練物が15mass%超になると、微粉過多となり前記と同様に嵩密度が低下することによって、成型炭に亀裂が発生し、強度が弱くなるものと推定される。   Moreover, when the kneaded material with a particle size of 75 micrometers or less becomes less than 5 mass%, there will be few fine powders which enter into the space | gap formed between the pseudo particles more than this, and a bulk density will fall similarly to the above. Moreover, when the kneaded material of 75 micrometers or less exceeds 15 mass%, it is estimated that it will be excessively fine and a bulk density will fall similarly to the above, and a crack will generate | occur | produce in a formed charcoal and intensity | strength will become weak.
また、コークスの生産性を向上させるためには、微粉炭を高温まで加熱して成型するのが好ましい。この微粉炭にはバインダーを添加するが、このバインダーは高温に成る程、高価なバインダーが必要となる。   Moreover, in order to improve the productivity of coke, it is preferable to heat and shape | mold pulverized coal to high temperature. A binder is added to the pulverized coal. The higher the temperature of the binder, the more expensive the binder is required.
このため、本発明者は安価で、かつ、出来る限り高温の状態で成型可能なバインダーを調査した結果、特開2004−149647号公報で提案されている様に、コークス製造過程から副生するタールから抽出されるバインダーが好ましいことが判明した。   For this reason, as a result of investigating binders that are inexpensive and moldable at as high a temperature as possible, the inventor as a by-product of coke production process as proposed in Japanese Patent Application Laid-Open No. 2004-149647. It has been found that binders extracted from are preferred.
なお、このバインダーの組成は、タール軽油、カルボル油、ナフタリン油、洗浄油等の低沸点油が10mass%以下、クレオソート油、ピレン等の軽質油と前記低沸点油の合計が15〜25mass%、ピッチが65〜80mass%、スラッジが5〜10mass%の範囲が好ましい。   The composition of this binder is 10 mass% or less for low boiling oils such as tar light oil, carbol oil, naphthalene oil, and washing oil, and the total of light oils such as creosote oil and pyrene and the low boiling oil is 15 to 25 mass%. The pitch is preferably in the range of 65 to 80 mass% and the sludge in the range of 5 to 10 mass%.
このバインダーを用いると、微粉炭の温度が170℃超では、該バインダーの粘性が、水以下(1×10-3Pa・s程度以下)となる。このため粘結力も小さくなり、過度に混練すると、生成した擬似粒子が崩壊し混練物粒度が本発明の粒度分布範囲内になりにくい。また、135℃未満では、コークスの生産性を充分に向上させることができず好ましくない。
このことから、本発明の成型炭の製造方法では、微粉炭の温度を135〜170℃としている。
When this binder is used, when the temperature of the pulverized coal exceeds 170 ° C., the viscosity of the binder becomes less than or equal to water (less than about 1 × 10 −3 Pa · s). For this reason, the caking force is also reduced, and if the mixture is excessively kneaded, the generated pseudo particles are disintegrated and the particle size of the kneaded product is unlikely to fall within the particle size distribution range of the present invention. Moreover, if it is less than 135 degreeC, the productivity of coke cannot fully be improved and it is unpreferable.
From this, the temperature of pulverized coal is 135-170 degreeC in the manufacturing method of the forming coal of this invention.
さらに、本発明者は、混練物の粒度分布を前記の範囲にするために、前記パドルミキサーによる混練時間について調査した。
その結果、微粉炭温度が135℃〜170℃のバインダーの粘性は水程度(1×10-3Pa・s程度)のため、過度に混練すると生成した擬似粒子が崩壊しやすい。そこで、混練時間を種々変えて、その際における混練物である擬似粒子の粒径を測定した。その結果を図3(a)、(b)に示す。
なお、擬似粒子を測定する測定装置は、篩目が600μm、300μm、75μmの多段式の振動篩を使用した。
Furthermore, the present inventor investigated the kneading time by the paddle mixer in order to bring the particle size distribution of the kneaded material into the above range.
As a result, the viscosity of the binder having a pulverized coal temperature of 135 ° C. to 170 ° C. is about water (about 1 × 10 −3 Pa · s). Therefore, the kneading time was changed variously, and the particle size of the pseudo particles as the kneaded product at that time was measured. The results are shown in FIGS. 3 (a) and 3 (b).
In addition, the measuring apparatus which measures a quasi-particle used the multistage type vibration sieve with a sieve mesh of 600 micrometers, 300 micrometers, and 75 micrometers.
図3(a)、(b)に示す様に、混練時間が1分未満の場合、十分な擬似粒子が生成されず、600μm以上の混練物が35mass%以上とならない。また、同時に粉が多量に残存するため75μm以下の混練物が15mass%以下とならない。また、混練時間が2分超の場合、擬似粒子が崩壊するため600μn以上の混練物が50mass%以下とならず、75μm以下の混練物が15mass%以下とならない。   As shown in FIGS. 3A and 3B, when the kneading time is less than 1 minute, sufficient pseudo particles are not generated, and the kneaded material of 600 μm or more does not become 35 mass% or more. At the same time, since a large amount of powder remains, the kneaded material of 75 μm or less does not become 15 mass% or less. Further, when the kneading time exceeds 2 minutes, the pseudo particles disintegrate, so that the kneaded material of 600 μn or more does not become 50 mass% or less, and the kneaded material of 75 μm or less does not become 15 mass% or less.
その結果、混練前の温度が135℃〜170℃の微粉炭を混練して、600μm以上の混練物が35mass%〜50mass%、且つ、75μm以下の混練物が5mass%〜15mass%の粒度分布を得るためには、バインダー混練時間1〜2分とすることが好ましい。   As a result, pulverized coal having a temperature before kneading of 135 ° C. to 170 ° C. is kneaded so that a kneaded product of 600 μm or more has a particle size distribution of 35 mass% to 50 mass% and a kneaded product of 75 μm or less has a mass distribution of 5 mass% to 15 mass%. In order to obtain, it is preferable to set the binder kneading time to 1 to 2 minutes.
本実施形態では、パドルミキサーを用いて混練を行ったが、これに限ることなく、例えば、ピンミキサーやミックスマラーの様な混練機を用いて混練を行ってもよい。   In the present embodiment, the kneading is performed using a paddle mixer. However, the present invention is not limited thereto, and the kneading may be performed using a kneader such as a pin mixer or a mix muller.
本発明の実施例および比較例を表1を参照して説明する。
本発明の実施例および比較例は、ともに、粒度が0.7mm以下の微粉炭に、150℃に加熱をしたタール軽油、カルボル油、ナフタリン油、洗浄油等の低沸点油が10mass%、クレオソート油、ピレン等の軽質油と前記低沸点油の合計が20mass%、ピッチが65mass%、スラッジが5mass%を含有するバインダーを微粉炭に対して7mass%添加しつつ、16枚のパドル羽根を有するパドルミキサーで混練した。そして、その後、この混練物をダブルロール式成型機にて、45kPaの加圧により成型炭を製造したものである。
Examples of the present invention and comparative examples will be described with reference to Table 1.
In both the examples and comparative examples of the present invention, low-boiling oils such as tar light oil, carbol oil, naphthalene oil, and washing oil heated to 150 ° C. in pulverized coal having a particle size of 0.7 mm or less are 10 mass%, cleo 16 paddle blades were added while adding 7mass% of pulverized coal to a binder containing 20mass% of light oil such as sort oil, pyrene and the low boiling oil, 65mass% of pitch and 5mass% of sludge. It knead | mixed with the paddle mixer which has. And after that, this kneaded material is what produced the charcoal by pressurization of 45 kPa with a double roll type molding machine.
実施例1〜3は、表1に示すように、微粉炭温度、混練時間、混練物の粒度が、上述した本発明の範囲内であるので、良好な成型炭の強度を得ることができた。   In Examples 1 to 3, as shown in Table 1, since the pulverized coal temperature, the kneading time, and the particle size of the kneaded material are within the above-described range of the present invention, it was possible to obtain good strength of the forming coal. .
また、実施例4は、バインダーを添加する前の微粉炭の温度が、本発明の好ましい範囲の上限を外れたので、実施例1〜3に比較して成型炭の強度が若干低下した。   Moreover, since the temperature of the pulverized coal before adding a binder deviated from the upper limit of the preferable range of the present invention in Example 4, the strength of the formed coal was slightly reduced as compared with Examples 1 to 3.
これに対し、比較例1はパドルミキサーでの混練時間が長く、比較例2は混練時間が短いので、600μm以上の粒度を有する混練物が本発明の下限を外れ、かつ、75μm以下の混練物も本発明の上限を外れたため、成型炭の強度が低かった。   In contrast, since Comparative Example 1 has a long kneading time in a paddle mixer and Comparative Example 2 has a short kneading time, a kneaded product having a particle size of 600 μm or more is outside the lower limit of the present invention, and a kneaded product of 75 μm or less. Also, since the upper limit of the present invention was exceeded, the strength of the coal was low.
本発明の成型炭の製造方法における石炭加熱プロセスフロー図である。It is a coal heating process flowchart in the manufacturing method of the forming coal of this invention. 本発明の成型炭の製造方法を用いて得られた、600μm(%)以上の混練物と成型炭強度との関係を示す説明図(a)、および75μm(%)以下の混練物と成型炭強度との関係を示す説明図(b)である。Explanatory drawing (a) which shows the relationship between the kneaded material of 600 micrometers (%) or more obtained by using the manufacturing method of the present invention and the strength of coal, and the kneaded material of 75 micrometers or less (%) and the coal It is explanatory drawing (b) which shows the relationship with an intensity | strength. 本発明の成型炭の製造方法における混練時間と混練物の粒度分布との関係を示す説明図である。It is explanatory drawing which shows the relationship between the kneading | mixing time and the particle size distribution of a kneaded material in the manufacturing method of the forming coal of this invention.
符号の説明Explanation of symbols
1 加熱機
2 パドルミキサー
3 ダブルロール式成型機
1 Heating machine 2 Paddle mixer 3 Double roll type molding machine

Claims (3)

  1. 加熱した微粉炭にバインダーを添加し混練した後、加圧成型して成型炭を製造する方法において、微粉炭とバインダーの混練後の粒度分布が600μm以上:35mass%〜50mass%、且つ、75μm以下:5mass%〜15mass%としたことを特徴とする成型炭の製造方法。   In the method of producing a coal molding by adding a binder to heated pulverized coal and then kneading, the particle size distribution after the pulverized coal and binder are kneaded is 600 μm or more: 35 mass% to 50 mass%, and 75 μm or less. : 5mass%-15mass%, The manufacturing method of the forming charcoal characterized by the above-mentioned.
  2. 前記バインダーを添加する前の微粉炭の温度は、135℃〜170℃であることを特徴とする請求項1に記載の成型炭の製造方法。   The method for producing a coal charcoal according to claim 1, wherein the temperature of the pulverized coal before adding the binder is 135 ° C to 170 ° C.
  3. 前記加熱した微粉炭と前記バインダーとの混練時間は、1〜2分であることを特徴とする請求項2に記載の成型炭の製造方法。
    The method for producing a coal charcoal according to claim 2, wherein the kneading time of the heated pulverized coal and the binder is 1 to 2 minutes.
JP2005207977A 2005-07-19 2005-07-19 Manufacturing method of coal Active JP4714518B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2005207977A JP4714518B2 (en) 2005-07-19 2005-07-19 Manufacturing method of coal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2005207977A JP4714518B2 (en) 2005-07-19 2005-07-19 Manufacturing method of coal

Publications (2)

Publication Number Publication Date
JP2007023170A JP2007023170A (en) 2007-02-01
JP4714518B2 true JP4714518B2 (en) 2011-06-29

Family

ID=37784374

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2005207977A Active JP4714518B2 (en) 2005-07-19 2005-07-19 Manufacturing method of coal

Country Status (1)

Country Link
JP (1) JP4714518B2 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4994880B2 (en) * 2007-02-20 2012-08-08 新日本製鐵株式会社 Coal making method
JP5673319B2 (en) * 2011-04-15 2015-02-18 新日鐵住金株式会社 Production method of agglomerated coal
KR101850132B1 (en) * 2013-12-24 2018-04-19 주식회사 포스코 Apparatus for manufacturing coal briquettes
KR101637965B1 (en) 2015-03-03 2016-07-08 주식회사 포스코 Additives and treating method for materials of carbonaceous
JP6863001B2 (en) * 2017-03-30 2021-04-21 日本製鉄株式会社 How to make coke

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09241655A (en) * 1996-03-12 1997-09-16 Nippon Steel Corp Previous treatment of coke raw material coal
JP3971615B2 (en) * 2002-02-04 2007-09-05 新日本製鐵株式会社 Method for adjusting the particle size of coal for coke oven charging

Also Published As

Publication number Publication date
JP2007023170A (en) 2007-02-01

Similar Documents

Publication Publication Date Title
JP4714518B2 (en) Manufacturing method of coal
EP2980017B1 (en) Method for producing graphite and particles for graphite production
WO2017159769A1 (en) Method for manufacturing artificial graphite electrode
JP4430448B2 (en) Method for producing isotropic graphite material
US1714165A (en) Harvey n
RU2257341C1 (en) Fine-grain graphite preparation process
JP5762653B1 (en) Coal charcoal, method for producing the same, and method of using charcoal
CN101343582A (en) Method for preparing moulded coke with ball press technique
JP4857540B2 (en) Method for producing coking coal and method for producing coke
JP6260563B2 (en) Ferro-coke manufacturing method
JP5386840B2 (en) Manufacturing method of ferro-coke for metallurgy
RU2400521C2 (en) Procedure for production of self-sintered mesophase powder for structural materials
RU2722542C1 (en) Method of producing powdered activated carbon
JP2007119602A (en) Method for producing ferrocoke
JP6877886B2 (en) Manufacturing method of binder for briquette
KR101907927B1 (en) coal briquet, manufacturing method thereof and manufacturing method for coke using the same
CA2920605C (en) Carbon material production method and carbon material
AT515982B1 (en) Process and plant for the production of carbon bodies
JPH05139831A (en) Production of high-quality carbonaceous molding
RU2256610C2 (en) High-density fine-grain coal-graphite materials production process
JP2012102325A (en) Method for producing formed coke, and formed coke produced by the method
RU2160704C2 (en) High-strength graphitized material
Nasibulin et al. Effect of Different Types of Nanostructured Additives and Mechanical Action on Pitch Matrix Properties for Producing Artificial Graphite
JP2008101112A (en) Manufacturing methods of molded product of ferrocoke raw material and ferrocoke
JP2005297082A (en) Graphite electrode for electric discharge machining and its manufacturing method

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20080306

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20110311

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20110317

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20110328

R151 Written notification of patent or utility model registration

Ref document number: 4714518

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R151

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20140401

Year of fee payment: 3

S533 Written request for registration of change of name

Free format text: JAPANESE INTERMEDIATE CODE: R313533

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20140401

Year of fee payment: 3

R350 Written notification of registration of transfer

Free format text: JAPANESE INTERMEDIATE CODE: R350

S533 Written request for registration of change of name

Free format text: JAPANESE INTERMEDIATE CODE: R313533

R350 Written notification of registration of transfer

Free format text: JAPANESE INTERMEDIATE CODE: R350