JP2910002B2 - Special carbon material kneading method - Google Patents

Special carbon material kneading method

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Publication number
JP2910002B2
JP2910002B2 JP4073274A JP7327492A JP2910002B2 JP 2910002 B2 JP2910002 B2 JP 2910002B2 JP 4073274 A JP4073274 A JP 4073274A JP 7327492 A JP7327492 A JP 7327492A JP 2910002 B2 JP2910002 B2 JP 2910002B2
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JP
Japan
Prior art keywords
kneading
binder
kneaded
temperature
weight
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.)
Expired - Lifetime
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JP4073274A
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Japanese (ja)
Other versions
JPH05238716A (en
Inventor
陽一 川野
秀彦 薄葉
昌宏 佐藤
Original Assignee
新日鐵化学株式会社
東北協和カーボン株式会社
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Publication of JPH05238716A publication Critical patent/JPH05238716A/en
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Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION
【0001】[0001]
【産業上の利用分野】本発明は等方性特殊炭素材の製造
工程において、混練時間を短縮すると共に、混練成形後
の焼成工程における割れ等による歩留り低下を防止する
方法に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for shortening the kneading time in a process for producing an isotropic special carbon material, and for preventing a reduction in yield due to cracks in a firing step after kneading and molding.
【0002】[0002]
【従来の技術】ホットプレス用型材、放電加工用電極、
連続鋳造用ダイス、SiC被覆基材、原子炉用材料、メ
カニカルシール材等に好適な等方性高密度炭素材(以下
特殊炭素材と称する)の製造工程においては、先づター
ルピッチコークス、石油コークス、人造黒鉛、カーボン
ブラック等の炭素質主原料を粉粒状に粉砕後、結合材で
あるコールタールピッチ、タール等の結合剤を配合して
結合剤の融点以上の温度域で充分に湿潤混練する捏合工
程が極めて重要である。
2. Description of the Related Art Hot press molds, electric discharge machining electrodes,
In the production process of isotropic high-density carbon material (hereinafter referred to as special carbon material) suitable for continuous casting dies, SiC coated base materials, materials for nuclear reactors, mechanical seal materials, etc., first, tar pitch coke, petroleum After pulverizing carbonaceous main raw materials such as coke, artificial graphite, carbon black, etc. into powder and granules, a binder such as coal tar pitch and tar is blended and sufficiently wet-kneaded in the temperature range above the melting point of the binder. The kneading process is extremely important.
【0003】従来の混練工程は、所定粒度に粉砕された
炭素質主原料に適正量の結合剤(以下バインダーピッチ
と称することとする)を配合し、バインダーピッチの融
点以上の適宜な温度で、所定時間混練する方法が種々提
案されている。
[0003] In the conventional kneading step, an appropriate amount of a binder (hereinafter referred to as a binder pitch) is blended with a carbonaceous main raw material pulverized to a predetermined particle size, and at an appropriate temperature equal to or higher than the melting point of the binder pitch. Various methods of kneading for a predetermined time have been proposed.
【0004】大正11年特許第42421号「電気用カ
ーボン製造法」では、コークス、黒鉛等をコールタール
ピッチ等の粘結剤と泥状に混捏し、成形する前に泥状原
料中の空気及び低温揮発性ガス体を排除し、その後成形
焼成する電気用カーボン製造法が開示されている。
[0004] In the Taisho 11 Patent No. 42421 "Carbon Production Method for Electricity", coke, graphite and the like are kneaded in a muddy state with a binder such as coal tar pitch, and air and mud in the muddy raw material are formed before molding. A method for producing carbon for electric use in which a low-temperature volatile gas body is removed and then formed and fired is disclosed.
【0005】特公昭47−22934号公報では、炭素
質原料および結合剤を混合し、これを200〜400℃
の温度域で加熱後の原料中の揮発分を5〜15%の範囲
になる迄予備加熱し、冷却、粉砕後成形、炭素質化する
炭素質成形体の製造法が開示されている。
In Japanese Patent Publication No. 47-22934, a carbonaceous raw material and a binder are mixed, and the mixture is mixed at 200 to 400 ° C.
A method for producing a carbonaceous molded body in which the volatile matter in the raw material after heating is preheated to a range of 5 to 15%, cooled, pulverized and formed into a carbonaceous material.
【0006】特公昭54−37076号公報では、炭素
質主原料とタールピッチを配合し、タールピッチの融点
以上の温度域で加圧しながら捏合する第1捏合工程と、
ついで加圧力を除去し、捏合物を酸素含有気流と接触さ
せながら第1工程と同等以上の温度域で捏合する第2工
程を適用し、この捏合物を冷却粉砕し、成形、焼成、黒
鉛化する摺動用炭素材の製造方法が開示されている。特
公平1−16789号公報には最大粒子径が約10μm
以下の微粒子状の炭素質原料に対し、結合剤を添加した
混合物を加熱混捏し、引きつづき加熱状態で該混合物を
ガス抜き処理に付した後、ラバープレスで成形し、焼成
黒鉛化する等方性高密度炭素材の製造方法が開示されて
いる。
[0006] Japanese Patent Publication No. 54-37076 discloses a first kneading step in which a carbonaceous main raw material and tar pitch are blended and kneaded while being pressed in a temperature range not lower than the melting point of the tar pitch.
Then, the pressing force is removed, and a second step of kneading the kneaded material in a temperature range equal to or higher than the first step while contacting the kneaded material with an oxygen-containing gas stream is applied. The kneaded material is cooled and pulverized, molded, fired, and graphitized. A method for producing a sliding carbon material is disclosed. JP-B-1-16789 discloses that the maximum particle size is about 10 μm.
The following particulate carbonaceous raw material is heated and kneaded with a mixture to which a binder has been added, and subsequently, the mixture is subjected to a degassing treatment in a heated state, and then molded by a rubber press, and is graphitized by firing. A method for producing a conductive high-density carbon material is disclosed.
【0007】何れにおいても、成形前に結合剤(バイン
ダーピッチ)の揮発分を揮散させ、低揮発分とした後、
成形する技術思想は開示され、更に特公昭54−370
76号公報では、通常炭素質主原料に対して30〜40
重量%のバインダーピッチ配合量を40〜75重量%に
増加させることが加圧捏合上必要であると記載されてい
る。又、特公平1−16789号公報には、炭素質原料
100重量部に対してバインダーピッチ等の結合剤を5
0〜130重量部添加することが記載されている。
[0007] In each case, the volatile matter of the binder (binder pitch) is volatilized before molding to reduce the volatile matter,
The technical idea of molding is disclosed, and furthermore, Japanese Patent Publication No. 54-370.
In the gazette of No. 76, usually 30 to 40
It is described that it is necessary for pressure kneading to increase the blending amount of the binder pitch in weight% to 40 to 75 weight%. Also, Japanese Patent Publication No. 1-16789 discloses that a binder such as a binder pitch is added to 100 parts by weight of a carbonaceous raw material.
It is described that 0 to 130 parts by weight is added.
【0008】しかしながら、何れの公知技術において
も、バインダーピッチは一度に添加され、従って成形前
に予め揮発分を減少させるのに長時間を必要とすること
は変らない。また特殊炭素材の物性は、コークス等の炭
素質主原料の種類、粒径、バインダーピッチ量、質等に
より決定されるが、バインダーピッチ量はその中でも、
大きな影響を与える。バインダーピッチ量を増やせば、
嵩密度(BD)が高くなり、強度を上げる成分(βレジ
ン)を増やすことになるので物性は良くなることは分っ
ているが、成形後の焼成時の歩留りが悪くなる。これは
バインダーピッチが増えることによって、同一の混練工
程では、成形物中の揮発分が増加し、焼成時にガス発生
が多くなり、ガス圧により割れる等により製品歩留りが
悪くなる。
However, in any known technique, the binder pitch is added all at once, so that it still takes a long time to reduce volatile matter in advance before molding. The physical properties of the special carbon material is determined by the type, particle size, binder pitch amount, quality, etc. of the carbonaceous main raw material such as coke.
Have a big impact. By increasing the amount of binder pitch,
It is known that the bulk density (BD) is increased and the component (β resin) for increasing the strength is increased, so that the physical properties are improved, but the yield at the time of firing after molding is deteriorated. This is because, in the same kneading step, the volatile matter content in the molded product increases due to an increase in the binder pitch, gas generation increases during firing, and the product yield deteriorates due to cracking due to gas pressure.
【0009】そこでバインダーピッチ量を増して、物性
強度と焼成歩留りを上げるためには、焼成時に発生する
ガスを少なくすればよい。前記の先行技術は、この目的
のために成形前に、捏合物を予備加熱処理して、揮発分
を予め低減させることをねらったものである。しかしな
がら、この捏合物はペースト状であることから、前記何
れの方法でも、揮発分の低減に長時間の混練を必要とす
ることは解決されていない。
Therefore, in order to increase the amount of binder pitch to increase the physical strength and the firing yield, it is only necessary to reduce the gas generated during firing. The prior art mentioned above aims at preliminarily heating the kneaded material before molding to reduce volatile components for this purpose. However, since this kneaded material is in the form of a paste, none of the above-mentioned methods has solved the need for long-time kneading to reduce volatile components.
【0010】また気液平衡上、混練時に発生したガスを
迅速に除去することが、揮発分の低減に有効であること
は明らかであるので、通常ブロワーにて発生ガスを吸引
排除することが行われているが、室温の低温空気を吸い
込むことになり、混練物を冷却する結果となって、揮発
分を効率よく下げることが出来ない。逆に室温も季節に
よって変動するため、残存揮発分を一定とする目的の作
業標準で作業していても、実際には変動するため、物性
変動の1原因と考えられる。
[0010] In addition, it is clear from the viewpoint of gas-liquid equilibrium that it is effective to quickly remove the gas generated during kneading to reduce volatile components. However, since the low-temperature air at room temperature is sucked, the kneaded material is cooled, and the volatile matter cannot be reduced efficiently. Conversely, since the room temperature also fluctuates depending on the season, even if the work is performed according to the work standard for keeping the remaining volatile content constant, it actually fluctuates, which is considered to be one cause of physical property fluctuation.
【0011】[0011]
【発明が解決しようとする課題】本発明の目的は、炭素
質主原料とバインダーピッチを混合し、揮発分を後の焼
成工程に好適な5〜15%程度に低減するに当って、短
時間に効率よく揮発分を低減でき、しかも出来た成形用
の混練物の揮発分をいちいち分析しなくても、作業管理
により常に一定の混練ができ、物性変動を小さくし、よ
って特殊炭素材製品の品質を安定化させる方法を提供す
ることである。
SUMMARY OF THE INVENTION An object of the present invention is to mix a carbonaceous main raw material with a binder pitch and reduce the volatile content to about 5 to 15%, which is suitable for the subsequent firing step. The volatile matter content can be reduced efficiently, and even without analyzing the volatile matter content of the kneaded material for molding, constant kneading can always be achieved by work management, and the fluctuation of physical properties can be reduced, so that special carbon material products can be manufactured. The aim is to provide a way to stabilize quality.
【0012】[0012]
【課題を解決するための手段】本発明者は前記の課題を
解決するため鋭意研究を行った結果、炭素質主原料とバ
インダーピッチの混練物の揮発分の低減に長時間を要す
るのは、混練物が高粘度のペースト状で、揮発ガスが抜
けにくいことにあり、それに対して少量づつのバインダ
ーピッチの添加では捏合物は一度にペースト状になら
ず、表面積の大きい粉体に近い状態であること、更にニ
ーダーの混練温度前後の熱ガスを吹き込めば、揮発ガス
を迅速に排除できると共に、混練が一定になるため炭素
材の物性変動を小さくできることを見い出し、本発明を
完成した。
Means for Solving the Problems The present inventor has conducted intensive studies to solve the above-mentioned problems. As a result, it takes a long time to reduce the volatile content of the kneaded material of the carbonaceous main material and the binder pitch. The kneaded material is in the form of a paste with high viscosity, which makes it difficult for volatile gas to escape.On the other hand, the kneaded material does not become a paste at once by adding a small amount of binder pitch, but in a state close to a powder having a large surface area. It has been found that if a hot gas at a temperature around the kneading temperature of the kneader is blown, the volatile gas can be quickly eliminated, and the kneading becomes constant, so that the variation in the physical properties of the carbon material can be reduced.
【0013】すなわち本発明は、(1) 炭素質主原料
に結合剤を配合し、結合剤の融点以上の温度域で混練す
る工程において、所定量の結合剤を少なくとも2回以上
に分割添加混練することを特徴とする特殊炭素材の混練
方法であり、
That is, in the present invention, (1) in a step of mixing a binder with a carbonaceous main raw material and kneading in a temperature range not lower than the melting point of the binder, a predetermined amount of the binder is dividedly added and kneaded at least twice or more. It is a method of kneading special carbon material characterized by
【0014】(2) 炭素質主原料に結合剤を配合し、
結合剤の融点以上の温度域で混練する工程において、混
練機の設定温度±50℃の範囲内の熱ガスを強制導入し
ながら混練することを特徴とする特殊炭素材の混練方法
であり、
(2) A binder is blended with the carbonaceous main material,
In the step of kneading in a temperature range equal to or higher than the melting point of the binder, a special carbon material kneading method characterized by kneading while forcibly introducing a hot gas within a range of the set temperature of the kneader ± 50 ° C,
【0015】(3) 所定量の結合剤を少なくとも2回
に分けて添加混練する前項(2)記載の特殊炭素材の混
練方法である。
(3) A method for kneading a special carbon material as described in (2) above, wherein a predetermined amount of a binder is added and kneaded at least twice.
【0016】以下に本発明を詳細に説明する。本発明に
おいては、炭素質主原料に、所定量の結合剤(以下単に
バインダーピッチと称する)を添加するとき、2回また
は3回、又はそれ以上の回に分けて添加する方法であ
る。分けて添加する間には勿論加熱混練が行われてい
る。コークス等の炭素質主原料に対し、この場合、全体
のバインダーピッチ添加量が50重量%であれば、第1
回目の添加量を例えば25重量%とし、第2回目に又2
5重量%添加するように行なう。3回以上に分けてもよ
い。
Hereinafter, the present invention will be described in detail. In the present invention, when a predetermined amount of a binder (hereinafter, simply referred to as a binder pitch) is added to the carbonaceous main raw material, it is a method of adding the binder twice, three times, or more times. Heat kneading is of course performed during the separate addition. In this case, if the total amount of binder pitch added to the carbonaceous main material such as coke is 50% by weight, the first
The addition amount is, for example, 25% by weight, and
Perform so that 5% by weight is added. It may be divided into three or more times.
【0017】このように分割して添加すると、第1回目
の添加では、バインダーピッチ量が少ないため、捏合物
はペースト状にならず、コークス粉体に近い状態である
ので表面積は大きくなり、揮発分は著しく飛散しやすく
なる。このようにして揮発分を下げたものに、2回目の
バインダーピッチを添加すると、同一の合計混練時間
で、通常の1回でバインダーピッチ全量を添加したもの
より、揮発分は下がる。逆に同一揮発分迄低減させる場
合には、本発明の場合短時間の混練で目的を達すること
になる。
In the first addition, since the binder pitch is small in the first addition, the kneaded material does not become a paste, but is close to coke powder. Minutes are significantly more easily scattered. When the second binder pitch is added to the material whose volatile content has been reduced in this way, the volatile content is lower than that obtained by adding the whole amount of the binder pitch in a single usual operation with the same total kneading time. Conversely, in the case of reducing to the same volatile content, in the case of the present invention, the purpose is achieved by short-time kneading.
【0018】前記した通り、混練中に、ブロワー等にて
発生ガスを吸引排出する従来の方法では、室温の冷風を
吸い込むことになり、混練物の温度を下げ、季節により
室温が変るため、同一作業を行っていても、成形前の混
練物の揮発分が変動することになり物性変動の1因とな
る。
As described above, in the conventional method of sucking and discharging generated gas by a blower or the like during kneading, cold air at room temperature is sucked in, the temperature of the kneaded material is lowered, and the room temperature changes depending on the season. Even during the operation, the volatile matter of the kneaded material before molding fluctuates, which is one of the causes of physical property fluctuation.
【0019】本発明では、混練機の設定温度±50℃の
範囲内に、加熱した空気又は酸素含有気体、あるいはア
ルゴン、窒素等の不活性ガスをブロワー等で昇圧し、加
熱して強制的に吹き込む。これによって吹込相当量のガ
スは混練機内の発生した揮発分を伴って排出され、混練
物の気液平衡を気体の方へ移行させ、揮発分の蒸発を促
進すると共に、季節による温度変化のない熱気体が吹き
込まれるため、混練物の温度が下って揮発を阻害したり
することなく、又、温度、時間の管理で常に一定の混練
が出来るので成形物ひいては製品特殊炭素材の物性変動
を小さくすることができる。
In the present invention, heated air or an oxygen-containing gas or an inert gas such as argon or nitrogen is pressurized by a blower or the like within a set temperature of a kneader of ± 50 ° C., and is heated to forcibly. Inhale. As a result, the gas equivalent to the blowing is discharged together with the generated volatile components in the kneader, which shifts the gas-liquid equilibrium of the kneaded material toward the gas, promotes evaporation of the volatile components, and has no seasonal temperature change. Because the hot gas is blown, the temperature of the kneaded material does not decrease and hinders volatilization.Also, the constant kneading is always possible by controlling the temperature and time. can do.
【0020】[0020]
【実施例】以下に実施例によって、本発明を更に具体的
に説明するが、本発明は、この実施例によって限定され
るものではない。タール系ピッチコークスを10μm以
下に粉砕したもの55重量部に対して、20メッシュ以
下に粉砕したタール系バインダーピッチを45重量部の
割合で配合した混合物5kgを250℃の加熱温度で混練
し、揮発分が13重量%になるまで混練して、その揮発
分になるまでの所要時間を測定して、比較例(対照例)
とした。
EXAMPLES The present invention will be described in more detail with reference to the following Examples, but it should not be construed that the present invention is limited thereto. 5 kg of a mixture of tar-based pitch coke pulverized to 10 μm or less and 55 parts by weight of tar-based binder pitch pulverized to 20 mesh or less in a ratio of 45 parts by weight is kneaded at a heating temperature of 250 ° C. and volatilized. Kneading until the content becomes 13% by weight, and measuring the time required until the content becomes volatile, a comparative example (control example)
And
【0021】(実施例1)前記コークス55重量部に対
し、前記バインダーピッチを全バインダーピッチの50
%に相当する22.5重量部の割合で第1回目に添加し
て、250℃で混練し、1.5時間後に第2回目として
残りのバインダーピッチを22.5重量部の割合で分割
添加して、配合した最終混合物5kgを、同じ250℃の
混練温度で混練して、揮発分が13重量%になるまでの
全所要時間を測定した。
(Example 1) For 55 parts by weight of the coke, the binder pitch was set to 50 times the total binder pitch.
%, 22.5 parts by weight corresponding to the first addition, kneading at 250 ° C., and after 1.5 hours, the second addition of the remaining binder pitch in 22.5 parts by weight as a second addition. Then, 5 kg of the blended final mixture was kneaded at the same kneading temperature of 250 ° C., and the total required time until the volatile matter became 13% by weight was measured.
【0022】(実施例2)前記コークス55重量部に対
し、前記バインダーピッチを45重量部の割合で全量を
配合した混合物5kgを、混練機中にコンプレッサーで圧
縮して、温度250℃に加熱した空気30L/min を吹
き込みながら、混練温度250℃で混練した。揮発分が
13重量%になる迄の所要時間を測定した。
(Example 2) 5 kg of a mixture obtained by mixing 45 parts by weight of the binder pitch with 55 parts by weight of the coke was compressed by a compressor in a kneader and heated to a temperature of 250 ° C. The mixture was kneaded at a kneading temperature of 250 ° C. while blowing air at 30 L / min. The time required for the volatile content to reach 13% by weight was measured.
【0023】(実施例3)前記コークス55重量部に対
し、前記バインダーピッチを全バインダーピッチの50
%に相当する22.5重量部の割合で第1回目に添加し
て、混練機中に温度250℃のコンプレッサーで圧縮し
て、加熱した空気30L/min を吹き込みながら混練温
度250℃で混練し、1時間後に、第2回目として残り
のバインダーピッチ22.5重量部の割合で分割添加
し、配合した混合物5kgを第1回目と同様に加熱空気を
吹込みながら混練温度250℃で混練して、揮発分が1
3重量%になるまでの全所要時間を測定した。これらの
結果を表1に示す。
Example 3 The binder pitch was set to 50 parts of the total binder pitch with respect to 55 parts by weight of the coke.
% At the kneading temperature of 250 ° C. while the compressed air was blown into the kneading machine at a temperature of 250 ° C. with a compressor at a temperature of 250 ° C. while blowing 30 L / min of heated air. After one hour, as a second time, the remaining 22.5 parts by weight of the binder pitch was dividedly added and kneaded at a kneading temperature of 250 ° C. while blowing 5 kg of the mixed mixture in the same manner as in the first time. , Volatile content is 1
The total time required to reach 3% by weight was measured. Table 1 shows the results.
【0024】(実施例4)前記コークス50重量部に対
し、前記バインダーピッチを全バインダーピッチの40
%に相当する20重量部の割合で第1回目に添加して、
250°Cで混練し、1.5時間後に第2回目として同
じく全バインダーピッチの40%に相当する20重量部
の割合で分割添加し、更に混練をつづけ、2.5時間後
に第3回目として残りのバインダーピッチ10重量部の
割合で分割添加して配合した最終混合物5kgを同じ25
0°Cの混練温度で混練して、揮発分が13重量%にな
るまでの全所要時間を測定した。
Example 4 The binder pitch was set to 40 parts of the total binder pitch with respect to 50 parts by weight of the coke.
% At the first time in a proportion of 20 parts by weight,
Kneading at 250 ° C., 1.5 hours later, as a second time, 20 parts by weight equivalent to 40% of the total binder pitch, and kneading was continued, and kneading was continued, and 2.5 hours later, as a third time 5 kg of the final mixture prepared by adding the remaining binder pitch in portions of 10 parts by weight was mixed with 25
Kneading was performed at a kneading temperature of 0 ° C., and the total required time until the volatile content became 13% by weight was measured.
【0025】比較例、実施例1,2,3,4の混練捏合
物を冷却後、微粉砕して、CIP(コールド・アイソタ
クティック・プレス…ラバープレス)法により1t/cm
2 の均等圧による成形を行い、10℃/Hrの昇温速度で
900℃迄焼成し、アチソン炉を用いて、3000℃迄
加熱して黒鉛化した。黒鉛化後の各物性を表2に示す。
The kneaded and kneaded products of Comparative Examples and Examples 1, 2, 3, and 4 were cooled, finely pulverized, and 1 t / cm by a CIP (cold isotactic press: rubber press) method.
Forming was performed under uniform pressure of 2 and calcined to 900 ° C. at a heating rate of 10 ° C./Hr, and heated to 3000 ° C. using an Acheson furnace to graphitize. Table 2 shows the physical properties after graphitization.
【0026】[0026]
【表1】 [Table 1]
【表2】 [Table 2]
【0027】[0027]
【発明の効果】本発明によるバインダーピッチの複数回
分割添加、又は加熱ガス吹込混練あるいはこの両者を併
用することにより、炭素質主原料とバインダーピッチと
の(同一揮発分迄低減するに要する)混練時間を大幅に
短縮できる。これによって、バインダーピッチ量を増量
して炭素材の強度を高めたい場合にも、同一混練時間以
下で混練捏合を可能にした。また熱ガス吹込により、季
節により室温が異なることに基づく、混練温度の低下、
物性変動を小さくできるので、回分毎に逐時揮発分を分
析しなくても、温度、時間の作業管理によって変動の少
ない製品を製造できる。
According to the present invention, the kneading of the carbonaceous main raw material and the binder pitch (required to reduce to the same volatile content) is carried out by adding the binder pitch a plurality of times, or by kneading with a heated gas or by using both in combination. Time can be greatly reduced. This enables kneading and kneading within the same kneading time even when it is desired to increase the binder pitch amount to increase the strength of the carbon material. In addition, due to the fact that the room temperature varies depending on the season due to hot gas injection, the kneading temperature decreases,
Since the variation in physical properties can be reduced, a product with less variation can be manufactured by controlling the operation of temperature and time without analyzing the volatile content of each batch.
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.6,DB名) C04B 35/52 ──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. 6 , DB name) C04B 35/52

Claims (3)

    (57)【特許請求の範囲】(57) [Claims]
  1. 【請求項1】 炭素質主原料に結合剤を配合し、結合剤
    の融点以上の温度域で混練する工程において、所定量の
    結合剤を少なくとも2回以上に分割添加混練することを
    特徴とする特殊炭素材の混練方法。
    In a step of mixing a binder with a carbonaceous main material and kneading the mixture in a temperature range not lower than the melting point of the binder, a predetermined amount of the binder is dividedly added and kneaded at least twice or more. Kneading method of special carbon material.
  2. 【請求項2】 炭素質主原料に結合剤を配合し、結合剤
    の融点以上の温度域で混練する工程において、混練機の
    設定温度±50℃の範囲内の熱ガスを強制導入しながら
    混練することを特徴とする特殊炭素材の混練方法。
    2. A process in which a binder is blended with a carbonaceous main material and kneaded in a temperature range not lower than the melting point of the binder while forcibly introducing a hot gas within a set temperature of a kneader of ± 50 ° C. A special carbon material kneading method.
  3. 【請求項3】 所定量の結合剤を少なくとも2回に分割
    添加混練する請求項2記載の特殊炭素材の混練方法。
    3. The method for kneading a special carbon material according to claim 2, wherein a predetermined amount of the binder is added and kneaded at least twice at a time.
JP4073274A 1992-02-25 1992-02-25 Special carbon material kneading method Expired - Lifetime JP2910002B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4073274A JP2910002B2 (en) 1992-02-25 1992-02-25 Special carbon material kneading method

Publications (2)

Publication Number Publication Date
JPH05238716A JPH05238716A (en) 1993-09-17
JP2910002B2 true JP2910002B2 (en) 1999-06-23

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014181168A (en) 2013-03-21 2014-09-29 Ibiden Co Ltd Method for manufacturing graphite material
JP2014181169A (en) * 2013-03-21 2014-09-29 Ibiden Co Ltd Method for manufacturing graphite material
JP6097651B2 (en) * 2013-07-29 2017-03-15 イビデン株式会社 Method for producing graphite material
US20190039909A1 (en) * 2016-03-17 2019-02-07 Nippon Steel & Sumikin Chemical Co., Ltd. Method for manufacturing artificial graphite electrode

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