JPH02142890A - Production of coal-derived needle coke - Google Patents
Production of coal-derived needle cokeInfo
- Publication number
- JPH02142890A JPH02142890A JP29742488A JP29742488A JPH02142890A JP H02142890 A JPH02142890 A JP H02142890A JP 29742488 A JP29742488 A JP 29742488A JP 29742488 A JP29742488 A JP 29742488A JP H02142890 A JPH02142890 A JP H02142890A
- Authority
- JP
- Japan
- Prior art keywords
- coke
- oil
- raw material
- coal
- needle coke
- 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.)
- Granted
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 8
- 239000011331 needle coke Substances 0.000 title abstract description 9
- 239000003245 coal Substances 0.000 title description 5
- 239000000571 coke Substances 0.000 claims abstract description 23
- 239000002994 raw material Substances 0.000 claims abstract description 23
- 238000000034 method Methods 0.000 claims abstract description 14
- 238000004939 coking Methods 0.000 claims abstract description 10
- 239000004215 Carbon black (E152) Substances 0.000 claims abstract description 7
- 239000011294 coal tar pitch Substances 0.000 claims abstract description 7
- 229930195733 hydrocarbon Natural products 0.000 claims abstract description 7
- 150000002430 hydrocarbons Chemical class 0.000 claims abstract description 7
- 230000003111 delayed effect Effects 0.000 claims abstract description 6
- 239000011280 coal tar Substances 0.000 claims abstract description 4
- SMWDFEZZVXVKRB-UHFFFAOYSA-N Quinoline Chemical compound N1=CC=CC2=CC=CC=C21 SMWDFEZZVXVKRB-UHFFFAOYSA-N 0.000 claims description 8
- 239000011311 coal-based needle coke Substances 0.000 claims description 6
- 239000000126 substance Substances 0.000 claims description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract description 10
- MWPLVEDNUUSJAV-UHFFFAOYSA-N anthracene Chemical compound C1=CC=CC2=CC3=CC=CC=C3C=C21 MWPLVEDNUUSJAV-UHFFFAOYSA-N 0.000 abstract description 10
- 229910052757 nitrogen Inorganic materials 0.000 abstract description 6
- 229910052717 sulfur Inorganic materials 0.000 abstract description 5
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 abstract description 4
- 239000011593 sulfur Substances 0.000 abstract description 4
- 239000000463 material Substances 0.000 abstract description 3
- 238000007796 conventional method Methods 0.000 abstract description 2
- 230000001007 puffing effect Effects 0.000 abstract 2
- 239000003921 oil Substances 0.000 description 22
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 18
- 238000005087 graphitization Methods 0.000 description 6
- 239000002904 solvent Substances 0.000 description 6
- 238000004821 distillation Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 238000009835 boiling Methods 0.000 description 4
- 238000006477 desulfuration reaction Methods 0.000 description 4
- 230000023556 desulfurization Effects 0.000 description 4
- 239000007788 liquid Substances 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- XDTMQSROBMDMFD-UHFFFAOYSA-N Cyclohexane Chemical compound C1CCCCC1 XDTMQSROBMDMFD-UHFFFAOYSA-N 0.000 description 2
- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 description 2
- 239000010692 aromatic oil Substances 0.000 description 2
- 229910021383 artificial graphite Inorganic materials 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 239000003350 kerosene Substances 0.000 description 2
- 238000004898 kneading Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- MBMLMWLHJBBADN-UHFFFAOYSA-N Ferrous sulfide Chemical compound [Fe]=S MBMLMWLHJBBADN-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 150000001491 aromatic compounds Chemical class 0.000 description 1
- 150000004945 aromatic hydrocarbons Chemical class 0.000 description 1
- 239000011305 binder pitch Substances 0.000 description 1
- 210000000988 bone and bone Anatomy 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000010908 decantation Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000003966 growth inhibitor Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000011310 petroleum-based needle coke Substances 0.000 description 1
- 239000011295 pitch Substances 0.000 description 1
- -1 polycyclic aromatic compound Chemical class 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
Landscapes
- Coke Industry (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は石炭系ニードルコークスの製造法に関するもの
であり、詳しくは黒鉛化時の不可逆膨張すなわち所謂バ
ッフィングの小さいニードルコークスの製造法に関する
ものである。[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a method for producing coal-based needle coke, and more specifically, to a method for producing needle coke that exhibits little irreversible expansion during graphitization, that is, so-called buffing. be.
（従来の技術）
近年、人造黒鉛電極は電極使用条件の苛酷化に併って、
高い機械的強度ならびに耐熱衝撃性に秀れていることが
要求されている。かかる人造黒鉛電極の製造には熱膨張
係数の小さいニードルコークスが必要でとりわけ熱膨張
係数の低い石炭系ニードルコークスは好まれている。し
かしながら、近時の黒鉛電極製造においては省エネルギ
ー化を図るために、従来からあるアチソン炉に変わって
迅速黒鉛化炉を用いる方法が多くなりつつある。(Conventional technology) In recent years, artificial graphite electrodes have become more difficult to use as the electrode usage conditions have become more severe.
It is required to have high mechanical strength and excellent thermal shock resistance. The production of such artificial graphite electrodes requires needle coke with a low coefficient of thermal expansion, and coal-based needle coke with a low coefficient of thermal expansion is particularly preferred. However, in recent years, in the production of graphite electrodes, in order to save energy, rapid graphitization furnaces are increasingly being used instead of the conventional Acheson furnace.
石炭系ニードルコークスを用いて製造した電極では、迅
速黒鉛化炉を用いて黒鉛化した際にバッフィング現象が
現れて亀裂を生じることがあり、また亀裂発生に至らな
いまでも見掛比重が小さくなって強度の十分な電極が得
られないことがある。When electrodes manufactured using coal-based needle coke are graphitized using a rapid graphitization furnace, a buffing phenomenon may occur and cracks may occur, and even if cracks do not occur, the apparent specific gravity may decrease. Therefore, it may not be possible to obtain an electrode with sufficient strength.
ところで、パンフィングの原因については、明確ではな
いがコークス中の炭素−硫黄結合、炭素窒素結合の高温
で分解生成物である硫化水素、窒素がコークス外部へ揮
散する時にコークス組織を押し広げるためとされている
。したがってバッフィングを防止するためには硫黄分、
窒素骨の少ない原料を選択すればよいが、なかなか入手
が困難である。また、もう一つの方法として原料の脱硫
・脱窒、コークスの脱硫・脱窒が挙げられ、種々提案さ
れている。（原料の脱硫−特公昭５２３９０４１号公報
、原料の脱窒−特開昭６０−１４９６９０号公報、コー
クスの脱硫−特開昭５４１２３１０１号公報）
しかし、多環芳香族化合物であるコークス原オ′１から
脱硫・脱窒はかならずしも容易ではなく、さらに重縮合
化したコークスに到っては、その脱硫・脱窒は極めて困
難である。かつコスト的にも割高となりあまり好ましく
ない。その他の方法として、硫化鉄等のバッフィング防
止剤を原料に添加し、コーキングする方法（特開昭５５
−１１０１９０号公報）が提案されているが、バッフィ
ング防止剤が結晶成長阻害物として作用し熱膨張係数を
悪化させ好ましくない。また灰分の増加にもつながるも
のである。By the way, the cause of panfing is not clear, but it is because hydrogen sulfide and nitrogen, which are decomposition products of carbon-sulfur bonds and carbon-nitrogen bonds in coke at high temperatures, are evaporated to the outside of the coke, spreading the coke structure. has been done. Therefore, to prevent buffing, sulfur content,
It would be better to choose raw materials with less nitrogen bone, but they are difficult to obtain. In addition, as another method, desulfurization and denitrification of raw materials and desulfurization and denitrification of coke can be cited, and various proposals have been made. (Desulfurization of raw materials - Japanese Patent Publication No. 5239041, Denitrification of raw materials - Japanese Patent Application Laid-open No. 149690/1983, Desulfurization of coke - Japanese Patent Publication No. 54123101) However, coke raw material O'1 which is a polycyclic aromatic compound It is not always easy to desulfurize and denitrify coke, and furthermore, it is extremely difficult to desulfurize and denitrify polycondensed coke. Moreover, it is not very preferable because it is expensive in terms of cost. Another method is to add an anti-buffing agent such as iron sulfide to the raw material and caulk (Japanese Patent Laid-Open No. 55
110190) has been proposed, but the buffing inhibitor acts as a crystal growth inhibitor and deteriorates the coefficient of thermal expansion, which is not preferable. It also leads to an increase in ash content.
（発明が解決しようとする課題）
上記の提案のようにほとんどが、バッフィングの原因で
ある硫黄・窒素を除くか、あるいは安定化さ−Ｕるか等
の対策であり、新たな問題を呈するものもある。(Problem to be solved by the invention) Most of the above proposals are measures such as removing sulfur and nitrogen that cause buffing, or stabilizing them, and they present new problems. There is also.
また、石炭ニードルコークスは石油系ニードルコークス
に比較し、パンツインクが高（、かつ黒鉛電極製造時に
パンツインクを抑えるために入れるバッフィング防止剤
（一般に酸化鉄）の効果が小さいとも言われている。こ
の原因については、種々様々な説があり必ずしも明確に
されていない。Furthermore, compared to petroleum-based needle coke, coal needle coke is said to have a higher amount of pant ink (and is said to have less effect on anti-buffing agents (generally iron oxide) added to suppress pant ink during graphite electrode manufacture. There are various theories as to the cause of this, and it is not always clear.
そこで本発明者らは、上記実情に鑑み、さらに改良され
た方法を見出すべく鋭意検討した結果、硫黄、窒素等の
低減によるパンツインク低下よりも、コークス組織・構
造を変える方がより絶大な効果があり、また酸化鉄の効
果も石油系と同等のものができることを見い出し、本発
明の完成に到った。Therefore, in view of the above-mentioned circumstances, the inventors of the present invention conducted intensive studies to find a further improved method, and found that changing the coke structure/structure has a greater effect than reducing pant ink by reducing sulfur, nitrogen, etc. The present invention has been completed based on the discovery that iron oxide has the same effect as petroleum-based iron oxide.
すなわち、本発明の要旨はキノリン不溶分を実質的に含
有しないコールタール、コールタールピッチ又はこれら
主体とする炭化水素物質である原料油をコークスドラム
に供給してディレードコーキング法によりコークス化す
る方法において、２００〜３６０℃留分を４０％〜５５
重量％含有するように調整した原料油をコークスドラ１
、に供給することを特徴とする石炭系ニードルコークス
の製造法に存する。That is, the gist of the present invention is to provide a method for coking by a delayed coking method by supplying raw material oil, which is coal tar, coal tar pitch, or a hydrocarbon material mainly composed of these, which does not substantially contain quinoline insoluble matter to a coke drum. , 200-360℃ fraction 40%-55
The raw material oil adjusted to contain % by weight was added to the coke drum 1.
A method for producing coal-based needle coke characterized by supplying the coke to a
以下本発明の詳細な説明する。The present invention will be explained in detail below.
まず本発明において使用される原料油はコールクール、
コールタールピッチあるいはこれらを主体とする炭化水
素物質である。これらの石炭系原料油は例えば次のよう
な方法によりＱｌを除去される。First, the raw material oil used in the present invention is Coal Coeur,
It is coal tar pitch or a hydrocarbon substance mainly composed of coal tar pitch. Ql is removed from these coal-based feedstock oils, for example, by the following method.
すなわち、これらの原料に溶剤として例えば沸点又は９
５容量％の留出温度が３５０℃以下であって次式で表わ
さるＢ、Ｍ、Ｃ，１，値
Ｂ、Ｍ、Ｃ，１，＝４８．６４０／に＋４７３．’ｌＳ
４５６、８
（式中には平均沸点（°Ｋ）、Ｓは６０°Ｆにおける比
重を示す）が５〜７０である炭化水素物質、具体的に好
ましくはシクロヘキサン、灯油、灯油子ナフタリン油等
を配合割合が原料：溶剤の重量仕として１：０．３〜１
：１になるように加え、混合する。次いで原料と溶剤と
の混合物を静置沈降しデカンテーション法などの簡便な
操作により不溶分を分離除去してＱ、１．を実質的に含
まない炭化水素が得られる。ここで清澄液として得られ
る縮合芳香族化合物を含む炭化水素物質のＱ、Ｉ。That is, these raw materials are treated with a solvent such as boiling point or 9
When the distillation temperature of 5% by volume is 350°C or lower, the value of B, M, C, 1, expressed by the following formula, B, M, C, 1, = 48.640/+473. 'lS
456,8 (in the formula, average boiling point (°K), S indicates specific gravity at 60°F) is a hydrocarbon substance of 5 to 70, specifically preferably cyclohexane, kerosene, kerosene naphthalene oil, etc. The mixing ratio is 1:0.3 to 1 by weight of raw material:solvent
: Add to 1 and mix. Next, the mixture of the raw material and the solvent is left to settle and the insoluble matter is separated and removed by a simple operation such as a decantation method to obtain Q.1. A hydrocarbon substantially free of is obtained. Q and I of hydrocarbon substances containing condensed aromatic compounds obtained here as clear liquids.
含有量は通常Ｏ２８重量％以下、好ましくは０．３重量
％以下、最適には０．１重量％以下に減少する。The content is usually reduced to less than 8% O2, preferably less than 0.3%, optimally less than 0.1% by weight.
ごのＱ、ｌ、含有量の１００分率の割合は後記する「改
質原料油」重量に対する割合である。The ratio of Q, 1, and 100% of the content is the ratio to the weight of "modified raw material oil" described later.
上記の混合、静置沈降、分離の各工程は操作を容易にす
るため好ましくは６０〜３５０℃程度の温度下で実施さ
れ例えばコールクールを原料とする場合には６０〜９０
℃程度、軟コールタールピッチの場合には１５０〜２９
０ ’Ｃ程度が好適である。The above-mentioned mixing, settling, and separation steps are preferably carried out at a temperature of about 60 to 350°C for ease of operation.
℃, 150 to 29 in the case of soft coal tar pitch
Approximately 0'C is suitable.
得られた清澄液は、次いで、溶剤の沸点或いは９５容量
％の留出温度以下、或いは約３５０℃以下の留出温度で
蒸留される。留出分は回収され、必要に応じて溶剤とし
て再使用される。例えば、原料としてコールタールを使
用する場合には、溶剤留出（例えば、シクロヘキサンの
場合には８１”ＣＢ＆、温度を約３００℃に上昇させ、
ピンチ化する方が後のコークス化に有利である。このよ
うにして藤留後、留出しない留分は改質原料油として取
り出される。The resulting clear liquid is then distilled at a distillation temperature below the boiling point of the solvent or 95% by volume, or below about 350°C. The distillate is collected and reused as a solvent if necessary. For example, when using coal tar as a feedstock, solvent distillation (e.g. 81"CB& for cyclohexane, raising the temperature to about 300°C,
Pinch-forming is more advantageous for subsequent coking. In this way, the fraction that is not distilled out after Fujitome is taken out as a reformed raw material oil.
得られる改質原料油はコークス化送大原料油としていわ
ゆるディレードコーキング法により加熱コークス化し生
ニードルコークスを得るが、本発明においては特定の前
処理がなされる。The resulting reformed raw material oil is heated and coked as a feedstock oil for coking by a so-called delayed coking method to obtain green needle coke, but in the present invention, a specific pretreatment is performed.
すなわちコークスドラム装入原料中に（常圧換算）２０
０〜３６０℃留分の芳香族油を４０〜５５重量％含むよ
うに調整する。かかる留分は吸収油、タレオソート油、
アントラセン油に相当し、芳香族炭化水素油主体の油で
あれば使用可能で、分子量分布の広い（沸点範囲の広い
）ものが好ましい。４０％未満ではバッフィングの低下
は小さく、５５％を超えると操業上、経済性の問題があ
る。調整方法としては、原料油に対する蒸留塔からのり
サイクル油の混合量いわゆるリサイクル比で制御する方
法、コークドラム装入原料に上記芳香族油を添加する方
法、つまりコークスドラムと蒸留塔の間に中間タンクを
設＋Ｊ、このタンクで混合調整する方法、あるいは配管
ミキサーをもうけ直接配管で調整する方法等が挙げられ
る。In other words, in the raw material charged to the coke drum (converted to normal pressure) 20
It is adjusted to contain 40 to 55% by weight of aromatic oil of 0 to 360°C fraction. Such fractions include absorption oil, taleosote oil,
Any oil that corresponds to anthracene oil and is mainly aromatic hydrocarbon oil can be used, and those with a wide molecular weight distribution (a wide boiling point range) are preferable. If it is less than 40%, the decrease in buffing will be small, and if it exceeds 55%, there will be economical problems in operation. Adjustment methods include controlling the amount of recycled oil from the distillation column relative to the feedstock oil using the so-called recycling ratio, and adding the aromatic oil to the raw material charged in the coke drum, i.e., controlling the amount of recycled oil from the distillation column relative to the feedstock oil. Examples include installing a tank and mixing and adjusting in this tank, or installing a piping mixer and adjusting directly through piping.
以上のように調整した原料を、４５０〜５００℃で常法
によりデイレ−トコ−キングを実施すればよいがその際
コークドラム内の滞留液体部、固体部と気体部の温度差
が５〜３０″Ｃとなるようにするとさらに効果的である
。また得られた生二ｌ−ルコークスの揮発分は熱膨張係
数の悪化をさけるため５％以下が好ましい。The raw material prepared as described above may be subjected to day-coking using a conventional method at 450 to 500°C, but at this time, the temperature difference between the liquid part, solid part, and gas part retained in the coke drum should be 5 to 30°C. It is even more effective if it is set to ``C.'' The volatile content of the obtained raw di-l-coke is preferably 5% or less in order to avoid deterioration of the coefficient of thermal expansion.
（実施例）
以下、実施例により本発明を更に詳細に説明するが、本
発明は後記する実施例に限定されるものではない。(Examples) Hereinafter, the present invention will be explained in more detail with reference to Examples, but the present invention is not limited to the Examples described later.
実施例１
キノリン不溶分が０％のコールクールピッチ（２００〜
３６０℃留分約２０重量％）にアントラセン油を添加し
、２００〜３６０℃留分が４５重量％のドラム供給原料
を作成し、ディレードコーキングし、生ニードルコーク
スを製造した。その後、ロータリーキルンで１４５０℃
で仮焼した。Example 1 Coal cool pitch with 0% quinoline insoluble content (200~
Anthracene oil was added to the 360°C fraction (about 20% by weight) to create a drum feedstock containing 45% by weight of the 200-360°C fraction, which was subjected to delayed coking to produce green needle coke. After that, it is heated to 1450℃ in a rotary kiln.
It was calcined in
この仮焼ニードルコークスを粉砕・篩別し、適宜に粒度
配合を行い、このちの１００部に対し、３２部のバイン
ダーピッチを加えた。This calcined needle coke was crushed and sieved, the particle size was appropriately mixed, and 32 parts of binder pitch was added to 100 parts.
混捏後、押出成形加工し、２５ｍｍφＸ１２０ｍｍＬの
テストピースを作り、焼成後１０００℃以上の温度範囲
は２０℃／分の昇温速度で２８００℃迄昇温し２８００
℃に３０分保持して黒鉛化を行った。After kneading, extrusion processing was performed to make a test piece of 25 mmφ x 120 mm L, and after firing, the temperature range of 1000°C or higher was raised to 2800°C at a heating rate of 20°C/min.
Graphitization was carried out by holding at ℃ for 30 minutes.
った。It was.
黒鉛化前後の直径の測定を行ないバッフィングを計算し
た。さらに、黒鉛化後のラストピースを２０ｍｍφＸ１
００ｍｍＬに削り、これを用いて２５〜１２５℃間の熱
膨張係数を測定した。その結果熱膨張係数は６．０ Ｘ
１０−７／’Ｃバツフイングは０゜５％であった。Buffing was calculated by measuring the diameter before and after graphitization. Furthermore, the last piece after graphitization is 20mmφX1
00 mmL, and using this, the coefficient of thermal expansion between 25 and 125°C was measured. As a result, the coefficient of thermal expansion is 6.0
The 10-7/'C buffing was 0.5%.
また、混捏時に酸化鉄２％を添加し、上記と同様に熱膨
張係数バッフィングを測定した。熱膨張係数は６．０
Ｘ １０−７／’Ｃ、バッフィングは０．１％であった
。Further, 2% iron oxide was added during kneading, and the thermal expansion coefficient buffing was measured in the same manner as above. Thermal expansion coefficient is 6.0
X 10-7/'C, buffing was 0.1%.
比較例１
実施例１において、アントラセン油を添加しないで実施
例１と同様の操作を行なった。Comparative Example 1 In Example 1, the same operation as in Example 1 was performed without adding anthracene oil.
酸化鉄無添加 熱膨張係数 ３．０ Ｘ １０−’／
’Ｃバンフィング ２．５％
酸化鉄２％添加 熱膨張係数 ３． ＯＸ １０−’／
’Ｃバッフィング ２．４％
比較例２
キノリン不溶分が０．３％のコールタールピッチ（２０
０〜３６０℃留分約２０％）にアントラセン油を添加し
、２００〜３６０℃留分が３０％の原料油を作成し実施
例１と同様の操作を行なった。No iron oxide added Thermal expansion coefficient 3.0 x 10-'/
'C Banffing 2.5% Addition of 2% iron oxide Coefficient of thermal expansion 3. OX 10-'/
'C Buffing 2.4% Comparative Example 2 Coal tar pitch with quinoline insoluble content of 0.3% (20
Anthracene oil was added to the 0-360° C. fraction (approximately 20%) to prepare a raw material oil with a 200-360° C. fraction of 30%, and the same operation as in Example 1 was performed.
酸化鉄無添加 熱膨張係数 ６． Ｏｘ １０−７／
’ｃバツフイング １．３％
酸化鉄２％添加 熱膨張係数 ６． ＯＸ １０−７／
’Ｃバツフイング １．１％
（発明の効果〕
本発明の方法は、バッフィングの低減方法として、従来
のＳ、Ｎ除去に比し経済性にすくれ、また石炭系ニード
ルコークスの難点である酸化鉄によるバッフィング低減
が改善され、
非常にその効
果は大である。No iron oxide added Coefficient of thermal expansion 6. Ox 10-7/
'c Buffing 1.3% Addition of 2% iron oxide Coefficient of thermal expansion 6. OX 10-7/
'C buffing 1.1% (Effects of the invention) The method of the present invention is less economical than conventional S and N removal as a buffing reduction method, and is also effective in reducing iron oxide, which is a drawback of coal-based needle coke. The buffing reduction has been improved, and the effect is very large.
出 願 人 三菱化成株式会社 代 理 人Out wish Man Mitsubishi Kasei Corporation teenager Reason Man
Claims (1)
ル、コールタールピッチ又はこれらを主体とする炭化水
素物質である原料油をコークスドラムに供給してディレ
ードコーキング法によりコークス化する方法において、
２００〜３６０℃の留分を４０〜５５重量％含有するよ
うに調整した原料油をコークスドラムに供給することを
特徴とする石炭系ニードルコークスの製造法。(1) In a method of supplying feedstock oil, which is coal tar, coal tar pitch, or a hydrocarbon substance mainly containing these, which does not substantially contain quinoline insoluble matter to a coke drum and converting it into coke by a delayed coking method,
A method for producing coal-based needle coke, which comprises supplying raw material oil adjusted to contain 40 to 55% by weight of a fraction of 200 to 360°C to a coke drum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63297424A JP2775784B2 (en) | 1988-11-25 | 1988-11-25 | Manufacturing method of coal-based needle coke |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63297424A JP2775784B2 (en) | 1988-11-25 | 1988-11-25 | Manufacturing method of coal-based needle coke |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02142890A true JPH02142890A (en) | 1990-05-31 |
| JP2775784B2 JP2775784B2 (en) | 1998-07-16 |
Family
ID=17846332
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63297424A Expired - Lifetime JP2775784B2 (en) | 1988-11-25 | 1988-11-25 | Manufacturing method of coal-based needle coke |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2775784B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015166444A (en) * | 2014-02-14 | 2015-09-24 | 三菱化学株式会社 | Hydrogenated coal tar pitch and production method thereof |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010265367A (en) * | 2009-05-13 | 2010-11-25 | Osaka Gas Chem Kk | Method for producing raw coke and method for producing needle coke |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63210187A (en) * | 1987-02-27 | 1988-08-31 | Nippon Steel Chem Co Ltd | Manufacture of coal-base needle-like pitch coke |
-
1988
- 1988-11-25 JP JP63297424A patent/JP2775784B2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63210187A (en) * | 1987-02-27 | 1988-08-31 | Nippon Steel Chem Co Ltd | Manufacture of coal-base needle-like pitch coke |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015166444A (en) * | 2014-02-14 | 2015-09-24 | 三菱化学株式会社 | Hydrogenated coal tar pitch and production method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2775784B2 (en) | 1998-07-16 |
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