JPH0273885A - Production of needle coke - Google Patents
Production of needle cokeInfo
- Publication number
- JPH0273885A JPH0273885A JP22506688A JP22506688A JPH0273885A JP H0273885 A JPH0273885 A JP H0273885A JP 22506688 A JP22506688 A JP 22506688A JP 22506688 A JP22506688 A JP 22506688A JP H0273885 A JPH0273885 A JP H0273885A
- Authority
- JP
- Japan
- Prior art keywords
- iron
- needle coke
- compound
- coke
- particle size
- 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
- 239000011331 needle coke Substances 0.000 title claims abstract description 21
- 238000004519 manufacturing process Methods 0.000 title claims description 14
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 47
- 229910052742 iron Inorganic materials 0.000 claims abstract description 23
- 239000002245 particle Substances 0.000 claims abstract description 23
- 150000002506 iron compounds Chemical class 0.000 claims abstract description 13
- 239000000843 powder Substances 0.000 claims abstract description 8
- 239000000203 mixture Substances 0.000 claims abstract description 7
- 238000002156 mixing Methods 0.000 claims abstract description 4
- 239000000571 coke Substances 0.000 claims description 10
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 abstract description 8
- 238000005087 graphitization Methods 0.000 abstract description 8
- -1 iron complex compound Chemical class 0.000 abstract description 4
- MBMLMWLHJBBADN-UHFFFAOYSA-N Ferrous sulfide Chemical compound [Fe]=S MBMLMWLHJBBADN-UHFFFAOYSA-N 0.000 abstract description 2
- 239000011300 coal pitch Substances 0.000 abstract description 2
- KTWOOEGAPBSYNW-UHFFFAOYSA-N ferrocene Chemical compound [Fe+2].C=1C=C[CH-]C=1.C=1C=C[CH-]C=1 KTWOOEGAPBSYNW-UHFFFAOYSA-N 0.000 abstract description 2
- 150000002484 inorganic compounds Chemical class 0.000 abstract description 2
- 229910010272 inorganic material Inorganic materials 0.000 abstract description 2
- 239000011301 petroleum pitch Substances 0.000 abstract description 2
- 238000002485 combustion reaction Methods 0.000 abstract 1
- 150000001875 compounds Chemical class 0.000 abstract 1
- 238000010411 cooking Methods 0.000 abstract 1
- 229940087654 iron carbonyl Drugs 0.000 abstract 1
- 230000001007 puffing effect Effects 0.000 abstract 1
- 239000011369 resultant mixture Substances 0.000 abstract 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 22
- 229910052799 carbon Inorganic materials 0.000 description 16
- 238000000034 method Methods 0.000 description 14
- 239000003921 oil Substances 0.000 description 13
- 239000002994 raw material Substances 0.000 description 11
- 229910002804 graphite Inorganic materials 0.000 description 8
- 239000010439 graphite Substances 0.000 description 8
- 238000010304 firing Methods 0.000 description 7
- 238000004939 coking Methods 0.000 description 6
- 238000009826 distribution Methods 0.000 description 5
- SMWDFEZZVXVKRB-UHFFFAOYSA-N Quinoline Chemical compound N1=CC=CC2=CC=CC=C21 SMWDFEZZVXVKRB-UHFFFAOYSA-N 0.000 description 4
- 239000011280 coal tar Substances 0.000 description 4
- 239000011294 coal tar pitch Substances 0.000 description 4
- 238000009835 boiling Methods 0.000 description 3
- 239000011329 calcined coke Substances 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 239000011305 binder pitch Substances 0.000 description 2
- 230000003111 delayed effect Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 239000003112 inhibitor Substances 0.000 description 2
- 238000004898 kneading Methods 0.000 description 2
- 239000002243 precursor Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 description 1
- 229910001634 calcium fluoride Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 238000000635 electron micrograph Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 239000007770 graphite material Substances 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 239000011812 mixed powder Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000011295 pitch Substances 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000011269 tar Substances 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、ニードルコークスの製造方法に関するもので
アシ、よシ詳しくは黒鉛化等の高温焼成時の膨張すなわ
ち、いわゆるバッフィングの小さいニードルコークスの
製造方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for producing needle coke, and more specifically, it relates to a method for producing needle coke. This relates to a manufacturing method.
（従来の技術９
従来、ニードルコークスは、石油系ピッチ又はキノリン
ネ溶分を除去した石炭系ピッチ等の原料油をデイレード
コーキング法等の方法でコークス化して製造され、炭素
成形体製造の炭素原料粒子として広く用いられておシ、
中でも黒鉛電極等の高度に黒鉛化した高品質の炭素成形
体用の炭素原料粒子は殆んどがこのニードルコークスで
ある。(Conventional technology 9) Conventionally, needle coke is produced by coking raw material oil such as petroleum pitch or coal pitch from which quinolinated content has been removed using a method such as a delayed coking method, and is used as a carbon raw material for producing carbon compacts. Widely used as particles,
Among these, most of the carbon raw material particles for highly graphitized, high-quality carbon molded bodies such as graphite electrodes are needle coke.
又、炭素成形体はコークス等の炭素原料粒子を所定の割
合で配合し、これにピッチ、タール、合成樹脂等の粘結
剤を添加し、加熱しながら混捏し、この混捏物を押出し
成形又は型込め成形によシ炭素質成形品を得、さらに焼
成、黒鉛化して製造されている。In addition, carbon molded products are made by blending carbon raw material particles such as coke in a predetermined ratio, adding a binder such as pitch, tar, or synthetic resin to this, kneading while heating, and extruding or molding this mixture. It is manufactured by obtaining a carbonaceous molded product through molding, followed by firing and graphitization.
（発明が解決しようとする問題点）
しかし、近時の黒鉛電極等の炭素成形体の製造において
は、省エネルギーのために迅速黒鉛化法の採用が多くな
りつつあるが、前述の方法で得られたニードルコークス
を炭素成形体の製造にそのまま供した場合には迅速黒鉛
化等の高温焼成時にバッフィング現象が顕著に現れて製
品に亀裂を生じることがらシ、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十分な強度を有する製
品が得られないことがある。(Problem to be solved by the invention) However, in recent years, in the production of carbon molded bodies such as graphite electrodes, rapid graphitization methods are increasingly being adopted to save energy. If used needle coke is directly used in the production of carbon compacts, a buffing phenomenon may occur during high-temperature firing such as rapid graphitization, resulting in cracks in the product. The applied specific gravity may become small and a product with sufficient strength may not be obtained.
このだめ、従来よシ黒鉛電極等の黒鉛材料を製造する際
にはニードルコークスとバインダーピッチとの混練工程
において酸化鉄、弗化カルシウム、酸化チタン等のバッ
フィング防止剤を添加する方法（例えば米国特許第、３
３ｇ９９．３号、同３ｓｔ、ａ’ｙｏｓ号、同、３ｇ７
，１４１２７号明細書等）が知られているが、必ずしも
満足できる効果が得られていなかった。To overcome this problem, the conventional method of manufacturing graphite materials such as graphite electrodes involves adding buffing inhibitors such as iron oxide, calcium fluoride, and titanium oxide in the kneading process of needle coke and binder pitch (for example, in the US patent 3rd, 3rd
3g99.3, 3st, a'yos, 3g7
, 14127, etc.), but satisfactory effects have not always been obtained.
本発明者等は、このバッフィング発生の問題を解決すべ
く鋭意検討した結果、原料油に平均粒径／θμｍ以下の
可及的粒径のＭかい鉄又は鉄化合物の粉体を均一に混合
した後コークス化すれば、該鉄又は鉄化合物が内部組織
にまで均−且つ充分に分布してなるニードルコークスが
得られ、かかるニードルコークスを炭素成形体製造に供
した場合、該鉄又は鉄化合物がバッフィング防止剤とし
て効果的に作用し、高温焼成時のバッフィングを大幅に
減じ得ることを見出し、本発明に到達した。As a result of intensive studies to solve this problem of buffing, the inventors of the present invention uniformly mixed powder of M iron or iron compound with the possible particle size of average particle size / θμm or less into the raw oil. By post-coking, needle coke in which the iron or iron compound is evenly and sufficiently distributed even in the internal structure can be obtained, and when such needle coke is used for producing carbon compacts, the iron or iron compound is The inventors have discovered that it acts effectively as a buffing inhibitor and can significantly reduce buffing during high-temperature firing, and have arrived at the present invention.
即ち、本発明の目的は黒鉛化等の高温焼成時におけるバ
ッフィングの少ないニードルコークスを製造することに
ある。That is, an object of the present invention is to produce needle coke that exhibits less buffing during high-temperature firing such as graphitization.
又、本発明の他の目的は、高温焼成時のバッフィングを
最小限に抑制して高密度且つ高強度の炭素成形体を製造
することにある。Another object of the present invention is to produce a high-density and high-strength carbon molded body by minimizing buffing during high-temperature firing.
（問題点を解決する為の手段９
しかして、かかる本発明の目的Ｆｉ、原料油に平均粒径
１０μｍｂ下の鉄又は鉄化合物の粉体を均一に混合した
後コークス化することを特徴とするニードルコークスの
製造方法によシ容易に達成される。(Means for Solving Problems 9) Therefore, the objective Fi of the present invention is to uniformly mix iron or iron compound powder with an average particle size of 10 μm or less into raw oil and then coke it. This can be easily achieved by the needle coke manufacturing method.
（作 用〕 以下、本発明の詳細な説明する。(For production) The present invention will be explained in detail below.
本発明に用いる原料油としては、通常の二ドルコークス
製造用の原料油であれば、特に限定されるものではなく
、具体的には、例えばコールタール、コールタールピン
チ、石油系ノ重質油、石炭液化物及びナフサ分解残油等
が挙げられる。これらのうちコールタール及びコールタ
ールピッチ等のキノリンネ溶分の含有量の多い原料油は
通常ニードルコークス製造には不向きとされるが、キノ
リンネ溶分を、例えば、特公昭４ ／ −１’ ９ Ｊ
り３号公報に記載されている通シの方法で除去して用い
ることができる。The raw material oil used in the present invention is not particularly limited as long as it is a common raw material oil for two-dollar coke production, and specifically, examples include coal tar, coal tar pinch, petroleum heavy oil, etc. , coal liquefied products, naphtha decomposition residual oil, etc. Among these, feedstock oils with a high content of quinoline solubles, such as coal tar and coal tar pitch, are generally considered unsuitable for needle coke production.
It can be removed and used by the conventional method described in Publication No. 3.
即ち、キノリンネ溶分の含有量の多い原料油と沸点又は
９Ｓ容量係の留出温度が３３０ ′Ｑ以下であって次式
で表わされるＢ、 Ｍ、 Ｃ，Ｉ値Ｂ、Ｍ、Ｃ，Ｉ＝ｌ
１ｇ、Ａ’１０／に＋’ｌり、？、７Ｓ−４１３ｔ、と
（式中、Ｋは平均沸点（Ｋ）、Ｓはｔｏ′Ｆにおける比
重を示す。）
がｉｓ〜６まである炭化水素物質とを混合し、次いで該
混合物を静置沈降、分離して得られる清溌液を蒸留して
、キノリンネ溶分が除去された原料油をニードルコーク
ス製造用に用いることができる。That is, the raw material oil has a high content of quinoline solubles and the boiling point or distillation temperature in terms of 9S capacity is 330'Q or less, and the B, M, C, I values B, M, C, I expressed by the following formula. =l
1g, +'l to A'10/? , 7S-413t, (where K is the average boiling point (K) and S is the specific gravity at to'F) is mixed with a hydrocarbon substance having a value of up to is ~ 6, and then the mixture is left to settle. The cleaning liquid obtained by separation is distilled, and the raw material oil from which the quinolinated component has been removed can be used for needle coke production.
又、本発明で用いられる鉄又は鉄化合物としては、金属
鉄並びに酸化鉄、鉄鉱石及び硫化鉄等鉄の種々の無機化
合物が挙げられ、この他に鉄−）） ／ｌ／ ホニル、
フェロセン等の有機系の鉄錯体化合物が挙げられる。た
だし、このうち有機系の鉄錯体化合物はコークス化の際
に分解し、該鉄錯体化合物中の鉄元素の一部は揮散し、
残った鉄元素もコークス中で完全に均一には分散しにく
い為、鉄の無機化合物を用いた場合と比べてバッフィン
グ抑制の効果がやや小さい。Further, iron or iron compounds used in the present invention include metallic iron and various inorganic compounds of iron such as iron oxide, iron ore, and iron sulfide.
Examples include organic iron complex compounds such as ferrocene. However, among these, organic iron complex compounds are decomposed during coking, and some of the iron elements in the iron complex compounds are volatilized.
Since the remaining iron element is also difficult to be completely and uniformly dispersed in the coke, the effect of suppressing buffing is slightly smaller than when an inorganic iron compound is used.
本発明では上記の鉄又は鉄化合物を平均粒径／、０１１
ｍ以下、好ましくは０．０ ｋ −０，００／ ｌｔｍ
の粉体として用いることが重要であって、この様に粒径
の細かい粉体を原料油に混合することにより、バッフィ
ング防止剤としての鉄又は鉄化合物が微細々内部組織に
まで充分に均一に分布してなるニードルコークスが製造
可能となる。In the present invention, the above iron or iron compound has an average particle size of /, 011
m or less, preferably 0.0 k -0,00/ltm
It is important to use it as a powder, and by mixing powder with such a fine particle size into the raw oil, the iron or iron compound as a buffing preventive agent can be sufficiently uniformed even to the minute internal structure. It becomes possible to produce distributed needle coke.
鉄又は鉄化合物の粉体の平均粒径は通常の粒度分布測定
装置、例えば遠心沈降法を利用する装置又は電子顕微鏡
写真を画像処理する装置等を用いて求めることが出来る
。具体的には例えば、データ処理システムが組込まれて
いる英国ジョイス・レープル社ｒｒ＋ｃＦ−ｑ型サブミ
クロン粒子径分布測定装置」を用いれば、粒子径分布及
び粒子径の最頻値を求めることができ、該最頻値は平均
粒径の目安となる。The average particle size of the iron or iron compound powder can be determined using a conventional particle size distribution measuring device, such as a device that uses a centrifugal sedimentation method or a device that processes electron micrographs. Specifically, for example, the particle size distribution and the mode of the particle size can be determined by using the RR+cF-Q type submicron particle size distribution measuring device manufactured by Joyce Raeple, UK, which has a built-in data processing system. , the mode serves as a guideline for the average particle size.
これらの鉄又は鉄化合物の粉体は、例えばラインミキサ
ー、ホモミキサー、モータ駆動の攪拌機等通常の方法で
原料油に混合すればよい。These iron or iron compound powders may be mixed with the raw material oil by a conventional method such as a line mixer, a homomixer, a motor-driven stirrer, or the like.
通常、原料油はその種類に応じた条件でコークス化して
ニードルコークスとされ、本発明における原料油と鉄又
は鉄化合物の粉体との混合物のコークス化の方法も、従
来公知の方法を含む広い範囲から選択され得るが、工業
的には、コーカー（熱処理槽）の底部から原料ピンチを
挿入し、夕θθ〜ｌθθ℃、常圧〜１０ｋｇ／Ｃ１１に
程度の圧力下、約／コ〜ｐｙ時間かけて徐々に軽沸分を
除去しながらコークス化するデイレードコーカー法でコ
ークス化するのが一般的である。Usually, feedstock oil is coked into needle coke under conditions depending on its type, and the method of coking the mixture of feedstock oil and iron or iron compound powder in the present invention can be performed in a wide range of ways, including conventionally known methods. Although it can be selected from the range, industrially, a raw material pinch is inserted from the bottom of the coker (heat treatment tank), and the temperature is θθ~lθθ℃, under a pressure of about 10kg/C11, about 1/co~py time. It is common to use a delayed coker method, in which coke is produced while gradually removing light-boiling components.
かくして得られるニードルコークスの生コークスは、そ
のまま炭素成形体製造用に供してもよいし、／θ００〜
／！；００℃程度の湯度で仮焼し、内部に数係残存して
いる水素、酸素、窒素等の炭素以外の元素を揮散せしめ
、仮焼コークスとした後、炭素成形体製造用に供しても
よい。The needle coke raw coke thus obtained may be used as it is for producing carbon molded bodies, or /θ00~
/! Calcined at a hot water temperature of about 00℃ to volatilize elements other than carbon such as hydrogen, oxygen, nitrogen, etc. remaining inside the coke to form calcined coke, which is then used for manufacturing carbon compacts. Good too.
（実施例９
以下、本発明を実施例によシ更に詳細に説明するが、本
発明はその要旨を超えない限）、下記実施例によシ限定
されるものではない。(Example 9 Hereinafter, the present invention will be explained in more detail with reference to Examples, but the present invention is not limited to the following Examples unless it exceeds the gist thereof).
（実施例１）
コールタールピッチ１００重量部に、平均粒径０．０．
２μｍの鉄粒子（真空冶金■製「ウルトラファインパウ
ダーＪ ） ０．２重量部を添加し、約ｉｏｏ℃に加熱
しながらホモミキサーでｌＯ分間分散処理した。得られ
た混線物をオートクレーブに仕込み、電気炉で７時間か
けてＳＯＯ℃まで昇温し、夕θθ℃で５時間保持した後
冷却し、オートクレーブの内容物を取シ出し、揮発分６
％のコークスを得た。続いて、該コークスをフタ付きの
アルミナ製容器に入れ、電気炉で／ ３０００Ｇまで昇
流して２時間処理し、仮焼コークスを得た。該仮焼コー
クスにバインダーピッチを添加し、成形した後７０００
℃で焼成し、直径／ｇＩＩ１１、長さｇｏｌＢＨの円柱
状の黒鉛成形体の前駆体を作成した。該前駆体をタンマ
ン炉で２７００℃で焼成して黒鉛化処理して得た黒鉛成
形体の熱膨張係数と黒鉛化処理前後の体積の違いから算
出したノξソフイングとをそれぞれ下記表７に示す。(Example 1) 100 parts by weight of coal tar pitch was added with an average particle size of 0.0.
0.2 parts by weight of 2 μm iron particles (“Ultra Fine Powder J” manufactured by Vacuum Metallurgy ■) were added and dispersed for 10 minutes in a homomixer while heating to about 100°C.The resulting mixture was charged into an autoclave. The temperature was raised to SOO℃ over 7 hours in an electric furnace, and after being kept at θθ℃ for 5 hours in the evening, it was cooled, and the contents of the autoclave were taken out to reduce the volatile content to 6.
% coke was obtained. Subsequently, the coke was placed in an alumina container with a lid, and heated up to 3,000 G in an electric furnace for 2 hours to obtain calcined coke. After adding binder pitch to the calcined coke and molding, 7000
C. to produce a precursor of a cylindrical graphite molded body having a diameter/gII11 and a length golBH. The thermal expansion coefficient of the graphite molded body obtained by firing the precursor at 2700 ° C. in a Tammann furnace and graphitization treatment and the ξ softening calculated from the difference in volume before and after graphitization treatment are shown in Table 7 below. .
（実施例２）
１００重量部のコールタールピッチに加える鉄粒子の添
加量を／、０重量部とした以外は前記実施例／と全く同
様にしたところ、得られた黒鉛成形体の熱膨張係数及び
バッフィングは下記表７に示す通シとなった。(Example 2) The same procedure as in Example 2 was carried out except that the amount of iron particles added to 100 parts by weight of coal tar pitch was 0 parts by weight. The coefficient of thermal expansion of the graphite molded body obtained was and buffing were as shown in Table 7 below.
（実施例３）
コールタールピッチｉｏｏ重量部に、鉄粒子を添加する
かわシに、粒子径分布測定装置（英国ジョイス・レープ
ル社製ＤＣＦＦ型）で求めた粒子分布のピークが０．１
μｍである酸化鉄ＣＴＨ）粒子ｏ、ｉ重量部を添加した
以外は前記実施例／と全く同様にしたところ、得られた
黒鉛成形体の熱膨張係数及びバッフィングは下記表１に
示す通シとなった。(Example 3) Iron particles were added to 100 parts by weight of coal tar pitch, and the peak of the particle distribution measured with a particle size distribution measuring device (Model DCFF, manufactured by Joyce Rapple, UK) was 0.1.
The same procedure as in the above example was carried out except that o and i parts by weight of iron oxide CTH) particles of μm were added. The thermal expansion coefficient and buffing of the graphite molded body obtained were as shown in Table 1 below. became.
（比較例）
コールタールピンチに鉄粒子を添加することなくそのま
まオートクレーブに仕込んでコークス化に供した以外は
前記実施例と全く同様にしたところ、得られた黒鉛成形
体の熱膨張係数及びバッフィングは下記表／に示す通り
となった。(Comparative Example) The same procedure as in the previous example was carried out except that the coal tar pinch was directly charged into an autoclave without adding iron particles and subjected to coking, and the thermal expansion coefficient and buffing of the graphite compact obtained were as follows. The results were as shown in the table below.
表 ／
（発明の効果）
本発明方法によれば、黒鉛化等高淵焼成時のバッフィン
グの極めて小さなニードルコークスが容易に得られ、又
、本発明方法によシ製造されたニードルコークスを原料
として用いればバッフィングを効果的に抑制して高品質
の炭素成形体を工業的有利に製造することが可能であっ
て、多大な工業的利益を提供するものである。Table / (Effects of the Invention) According to the method of the present invention, needle coke with extremely small buffing during high-water firing such as graphitization can be easily obtained, and needle coke produced by the method of the present invention can be used as a raw material. If used, it is possible to effectively suppress buffing and produce high-quality carbon molded bodies with industrial advantage, providing great industrial benefits.
願 理 三菱化成株式会社wish Reason Mitsubishi Kasei Corporation
Claims (1)
粉体を均一に混合した後コークス化することを特徴とす
るニードルコークスの製造方法。A method for producing needle coke, which comprises uniformly mixing iron or iron compound powder with an average particle size of 1.0 μm or less into raw oil, and then forming the mixture into coke.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22506688A JPH0273885A (en) | 1988-09-08 | 1988-09-08 | Production of needle coke |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22506688A JPH0273885A (en) | 1988-09-08 | 1988-09-08 | Production of needle coke |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0273885A true JPH0273885A (en) | 1990-03-13 |
Family
ID=16823502
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22506688A Pending JPH0273885A (en) | 1988-09-08 | 1988-09-08 | Production of needle coke |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0273885A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102392328A (en) * | 2011-08-29 | 2012-03-28 | 云南昆钢煤焦化有限公司 | Method for intensively producing carbon fiber raw material by coal pitch needle coke |
-
1988
- 1988-09-08 JP JP22506688A patent/JPH0273885A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102392328A (en) * | 2011-08-29 | 2012-03-28 | 云南昆钢煤焦化有限公司 | Method for intensively producing carbon fiber raw material by coal pitch needle coke |
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