JPH0416545A - Oxidation resistance graphite granulation matter for refractory - Google Patents
Oxidation resistance graphite granulation matter for refractoryInfo
- Publication number
- JPH0416545A JPH0416545A JP2120489A JP12048990A JPH0416545A JP H0416545 A JPH0416545 A JP H0416545A JP 2120489 A JP2120489 A JP 2120489A JP 12048990 A JP12048990 A JP 12048990A JP H0416545 A JPH0416545 A JP H0416545A
- Authority
- JP
- Japan
- Prior art keywords
- graphite
- boron carbide
- pitch
- refractories
- oxidation resistance
- 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
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 52
- 239000010439 graphite Substances 0.000 title claims abstract description 47
- 229910002804 graphite Inorganic materials 0.000 title claims abstract description 47
- 230000003647 oxidation Effects 0.000 title claims abstract description 22
- 238000007254 oxidation reaction Methods 0.000 title claims abstract description 22
- 238000005469 granulation Methods 0.000 title abstract description 3
- 230000003179 granulation Effects 0.000 title abstract description 3
- INAHAJYZKVIDIZ-UHFFFAOYSA-N boron carbide Chemical compound B12B3B4C32B41 INAHAJYZKVIDIZ-UHFFFAOYSA-N 0.000 claims abstract description 26
- 229910052580 B4C Inorganic materials 0.000 claims abstract description 25
- 239000011819 refractory material Substances 0.000 claims abstract description 19
- 229920005992 thermoplastic resin Polymers 0.000 claims abstract description 11
- 239000000843 powder Substances 0.000 claims abstract description 8
- 239000008187 granular material Substances 0.000 claims description 11
- 239000011295 pitch Substances 0.000 abstract description 20
- 239000005011 phenolic resin Substances 0.000 abstract description 7
- 229910052799 carbon Inorganic materials 0.000 abstract description 5
- 239000011230 binding agent Substances 0.000 abstract description 4
- 239000011248 coating agent Substances 0.000 abstract description 4
- 238000000576 coating method Methods 0.000 abstract description 4
- 238000005260 corrosion Methods 0.000 abstract description 4
- 230000007797 corrosion Effects 0.000 abstract description 4
- 239000002245 particle Substances 0.000 abstract description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 3
- 229910052760 oxygen Inorganic materials 0.000 abstract description 3
- 239000001301 oxygen Substances 0.000 abstract description 3
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 abstract description 2
- 229920001568 phenolic resin Polymers 0.000 abstract description 2
- 230000003078 antioxidant effect Effects 0.000 abstract 1
- 229920005989 resin Polymers 0.000 abstract 1
- 239000011347 resin Substances 0.000 abstract 1
- 230000001629 suppression Effects 0.000 abstract 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 10
- 230000000694 effects Effects 0.000 description 6
- 239000000203 mixture Substances 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 5
- 239000000395 magnesium oxide Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000011449 brick Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical compound [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- MYRTYDVEIRVNKP-UHFFFAOYSA-N 1,2-Divinylbenzene Chemical compound C=CC1=CC=CC=C1C=C MYRTYDVEIRVNKP-UHFFFAOYSA-N 0.000 description 2
- 239000003575 carbonaceous material Substances 0.000 description 2
- 239000011294 coal tar pitch Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000004898 kneading Methods 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 description 1
- 229910052582 BN Inorganic materials 0.000 description 1
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 description 1
- 229920000877 Melamine resin Polymers 0.000 description 1
- 239000004640 Melamine resin Substances 0.000 description 1
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 description 1
- 229920001807 Urea-formaldehyde Polymers 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
- 239000010426 asphalt Substances 0.000 description 1
- 229910052810 boron oxide Inorganic materials 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000009749 continuous casting Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- JKWMSGQKBLHBQQ-UHFFFAOYSA-N diboron trioxide Chemical compound O=BOB=O JKWMSGQKBLHBQQ-UHFFFAOYSA-N 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000010459 dolomite Substances 0.000 description 1
- 229910000514 dolomite Inorganic materials 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 239000007849 furan resin Substances 0.000 description 1
- BHEPBYXIRTUNPN-UHFFFAOYSA-N hydridophosphorus(.) (triplet) Chemical compound [PH] BHEPBYXIRTUNPN-UHFFFAOYSA-N 0.000 description 1
- 150000002484 inorganic compounds Chemical class 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011823 monolithic refractory Substances 0.000 description 1
- 229920003986 novolac Polymers 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000011301 petroleum pitch Substances 0.000 description 1
- 229920002239 polyacrylonitrile Polymers 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 235000011835 quiches Nutrition 0.000 description 1
- 239000011342 resin composition Substances 0.000 description 1
- 229920003987 resole Polymers 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 239000012815 thermoplastic material Substances 0.000 description 1
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
- 239000011332 wood tar pitch Substances 0.000 description 1
Landscapes
- Compositions Of Oxide Ceramics (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は耐火物用耐酸化性黒鉛造粒物に関し、特に高温
耐酸化性を向上させる目的で、不定形または定形の耐火
物に添加される黒鉛造粒物に関するものである。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to oxidation-resistant graphite granules for refractories, which are added to amorphous or regular refractories for the purpose of improving high-temperature oxidation resistance. The present invention relates to graphite granules.
［従来の技術］
耐火物は鉄鋼業をはじめとする高温高熱装置産業にとっ
て不可欠のものであり、高温耐酸化性や耐食性の優劣が
生産コストを大きく左右する。特に鉄鋼業は耐火物総使
用量の大半を占めており、例えば定形耐火物としてはマ
グネシア・カーボン煉瓦が転炉に、アルミナ・カーボン
煉瓦がトピートカーや連続鋳造用ノズルに用いられ、ま
た不定形耐火物としてはマグネシアやドロマイト等と炭
素質材料のバインダーで構成された造粒物が転炉補修用
に供されている。[Prior Art] Refractories are essential for high-temperature equipment industries such as the steel industry, and the quality of high-temperature oxidation resistance and corrosion resistance greatly influences production costs. In particular, the steel industry accounts for the majority of the total amount of refractories used.For example, as shaped refractories, magnesia carbon bricks are used in converters, alumina carbon bricks are used in topito cars and continuous casting nozzles, and monolithic refractories are used in Granules made of magnesia, dolomite, etc. and a carbonaceous material binder are used for converter repair.
また近年ではスラグや溶湯の浸透を防止するという耐食
性向上の目的で黒鉛を配合したマグネシア・カーボン煉
瓦やアルミナ・カーボン煉瓦等の耐火物が開発され、更
に該耐火物の高温耐酸化性の向上を目的として、マグネ
シア・カーボン系やアルミナ・カーボン系のマトリック
スに炭化ホウ素を添加混合して耐火物を構成する方法が
提供されている。In addition, in recent years, refractories such as magnesia carbon bricks and alumina carbon bricks containing graphite have been developed for the purpose of improving corrosion resistance by preventing the penetration of slag and molten metal. For this purpose, a method has been proposed in which a refractory is formed by adding boron carbide to a magnesia-carbon matrix or an alumina-carbon matrix.
しかしながら鉄鋼産業等を中心とする技術の高度化が進
むにつれて、より一層過酷な条件に耐え得る耐火物が要
求されている。However, as technology becomes more sophisticated, mainly in the steel industry, there is a demand for refractories that can withstand even harsher conditions.
［発明が解決しようとする１１！！！］本発明は上記事
情に着目してなされたものであフて、耐火物と混合した
際に優れた高温耐酸化性を示す黒鉛造粒物を提供しよう
とするものである。[Inventions to solve 11! ! ! ] The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide graphite granules that exhibit excellent high-temperature oxidation resistance when mixed with refractories.
［課題を解決するための手段］
上記目的を達成した本発明の黒鉛造粒物とは、黒鉛粉末
を、炭化ホウ素粉末を分散させたピッチまたは炭化性熱
可塑性樹脂によってコーティングしてなることを要旨と
するものである。[Means for Solving the Problems] The graphite granules of the present invention that achieve the above objects are obtained by coating graphite powder with pitch or carbonizable thermoplastic resin in which boron carbide powder is dispersed. That is.
［作用］
マグネシアやアルミナ等の耐火物と黒鉛、炭化ホウ素、
ピッチ若しくはフェノール樹脂を混練して成形した耐火
物は優れた高温耐酸化性を示すことが知られている。上
記耐火物の構成４分において黒鉛は、炭素材の中でも熱
的及び化学的に最も安定な構造を有していると共に、撥
水性が強いので、高温の溶融スラグや溶銑の浸食から耐
火物を保護する上で極めて有用な材料である。但し黒鉛
は６００℃付近から酸化が始まり、それ以上の高温にな
ると消失してしまう。そこで炭化ホウ素を添加して混合
すれば黒鉛と酸素の接触を可及的に抑制して、黒鉛の酸
化を防止し、耐火物の高温耐酸化性を高めることがで台
るものである。[Action] Refractories such as magnesia and alumina, graphite, boron carbide,
It is known that refractories formed by kneading pitch or phenolic resin exhibit excellent high-temperature oxidation resistance. In the composition of the refractory described above, graphite has the most thermally and chemically stable structure among carbon materials, and has strong water repellency, so it protects the refractory from erosion by high-temperature molten slag and hot metal. It is an extremely useful material for protection. However, graphite begins to oxidize at around 600°C and disappears at higher temperatures. Therefore, if boron carbide is added and mixed, contact between graphite and oxygen can be suppressed as much as possible, oxidation of graphite can be prevented, and the high-temperature oxidation resistance of refractories can be improved.
しかしながら上記耐火物は従来の耐火物よりも高い耐酸
化性を示すものの、次の様な問題があり改善の余地を残
している。即ち炭化ホウ素の添加による耐酸化性向上効
果は、黒鉛と炭化ホウ素が緊密に接触して存在すること
により始めて発揮されるものであるが、上記耐火物はカ
サ密度が異なる材料を混合したものであることから、各
成分は偏在し易く均一な分散が難しいだけでなく、炭化
ホウ素が、目的である黒鉛の表面ばかりでなく、それ以
外の部分にも分散してしまい、効果を薄めるものと考え
られる。However, although the above-mentioned refractories exhibit higher oxidation resistance than conventional refractories, they still have the following problems and leave room for improvement. In other words, the effect of improving oxidation resistance due to the addition of boron carbide is first exhibited when graphite and boron carbide are in close contact with each other, but the above refractory is a mixture of materials with different bulk densities. Therefore, not only are each component likely to be unevenly distributed and uniform dispersion is difficult, but boron carbide is also dispersed not only on the surface of graphite, which is the target, but also on other parts, weakening the effect. It will be done.
そこで本発明者らは上記問題を解決すべく鋭意研究を重
ねた結果、予め炭化ホウ素粉末を均一に分散させたピッ
チを用いて黒鉛粒子の表面を完全にコーティングし、こ
れを耐火材料に混合すると耐酸化性が著しく高くなるこ
とを見い出し、本発明を完成させた。尚上記ピッチに代
えてフェノール樹脂等をバインダーとして用いても同様
の耐火物が得られることを見い出した。Therefore, the inventors of the present invention conducted extensive research to solve the above problem, and found that the surface of graphite particles was completely coated with pitch in which boron carbide powder was uniformly dispersed, and this was mixed into the refractory material. It was discovered that oxidation resistance was significantly increased, and the present invention was completed. It has also been found that a similar refractory can be obtained by using a phenol resin or the like as a binder in place of the pitch described above.
以下本発明の詳細な説明する。The present invention will be explained in detail below.
本発明は黒鉛の種類を限定するものではなく、例えば天
然又は人造の鱗状黒鉛、土状黒鉛や製鋼工程から発生す
るキッシュグラファイト等が挙げられる。The present invention does not limit the type of graphite, and examples include natural or artificial scaly graphite, earthy graphite, and quiche graphite generated from the steel manufacturing process.
ピッチ類や炭化性熱可塑性樹脂は使用時の高熱によって
耐火物中で溶融して骨材間に浸透し、更に炭化され強固
なカーボンボンドとなり黒鉛と骨材の結合材として働く
。Pitch and carbonizable thermoplastic resin melt in the refractory due to the high heat during use, penetrate between the aggregates, and are further carbonized to form a strong carbon bond that acts as a binding material between graphite and aggregates.
本発明はピッチ類の種類についても限定するものではな
く、コールタールピッチ、木タールピッチ、ロジンピッ
チ、アスファルトピッチ、石油ピッチ等の他、各種工程
ピッチ等様々なものが挙げられるが、軟化点は８０℃以
上のものが好ましく、１００℃以上のものがより好まし
い、これはピッチ類の軟化点が８０℃未満の場合では常
温でも造粒後に粘着性を示して混練が不均一になること
があったり、固化して取扱いに支障を及ぼす恐れがある
からである。The present invention is not limited to the types of pitches, and examples include various pitches such as coal tar pitch, wood tar pitch, rosin pitch, asphalt pitch, petroleum pitch, and various process pitches, but the softening point is 80 ℃ or higher is preferable, and 100℃ or higher is more preferable. This is because if the softening point of the pitch is lower than 80℃, it may show stickiness after granulation even at room temperature and the kneading may become uneven. This is because there is a risk that it will solidify and cause problems in handling.
また本発明に関わる炭化性熱可塑性樹脂は、高温加熱に
より炭化する残炭性の熱可塑性樹脂であればその種類を
限定するものではなく、フェノール樹脂やフラン樹脂等
が例示できる。尚上記フェノール樹脂としては、ノボラ
ック型およびレゾール型のいずれのフェノール樹脂であ
ってもよく、また種々の置換基により変性されたものや
、尿素樹脂、メラミン樹脂、エポキシ樹脂などの他の構
成４分によって変性されたものであってもよいが、硬化
剤を含まない熱可塑性のものであることが必要である。Further, the carbonizable thermoplastic resin according to the present invention is not limited to any type as long as it is a carbonizable thermoplastic resin that can be carbonized by high-temperature heating, and examples thereof include phenol resins and furan resins. The above-mentioned phenol resin may be either a novolac type or a resol type phenol resin, and it may also be one modified with various substituents, or other compositions such as urea resin, melamine resin, and epoxy resin. Although it may be modified by, it is necessary to be a thermoplastic material that does not contain a curing agent.
更に上記ピッチ類や炭化性熱可塑性樹脂に代えて、セル
ロース、ジビニルベンゼン重合物及びポリアクリロニト
リル等の熱処理により炭素化するポリマーを用いてもよ
い。Furthermore, in place of the above-mentioned pitches and carbonizable thermoplastic resins, polymers that are carbonized by heat treatment, such as cellulose, divinylbenzene polymers, and polyacrylonitrile, may be used.
本発明に用いる炭化ホウ素としては粒度１００〜５００
メツシユのものが好ましく、３００メツシュ程度に粉砕
調整されたものがより好ましい。炭化ホウ素は黒鉛の酸
化を防ぐ作用を有するものであるが、本発明に係る炭化
ホウ素（８４Ｃ）は、約４００ｔで酸化され始めてガラ
ス状の酸化ホウ素（Ｂ２０ｓ ）となり、黒鉛の表面を
溶融状態で被覆し、黒鉛と周辺の酸素が接触しないよう
に遮断して黒鉛の酸化を抑制するものと考えられる。The boron carbide used in the present invention has a particle size of 100 to 500.
A mesh material is preferable, and a material pulverized to about 300 mesh is more preferable. Boron carbide has the effect of preventing the oxidation of graphite, but the boron carbide (84C) according to the present invention begins to oxidize at about 400 tons and becomes glassy boron oxide (B20s), leaving the surface of graphite in a molten state. It is thought that the oxidation of the graphite is suppressed by coating the graphite to prevent contact between the graphite and surrounding oxygen.
尚炭化ホウ素と類似の効果を示すことが期待される無機
化合物としては、窒化ホウ素や炭化硅素等が挙げられる
が、これらの酸化温度は１０００℃以上であるため、黒
鉛が酸化される前に保護するという機能が働き難い。Inorganic compounds that are expected to exhibit similar effects to boron carbide include boron nitride and silicon carbide, but since the oxidation temperature of these is 1000°C or higher, it is necessary to protect the graphite before it is oxidized. This function is difficult to function.
本発明は製造方法によっても限定されるものではないが
、以下に代表的な製法を示す。Although the present invention is not limited by the manufacturing method, typical manufacturing methods are shown below.
まずピッチ類または炭化性熱可塑性樹脂を軟化点以上の
温度に加熱して溶融し、炭化ホウ素粉末を加えて混合し
、均一分散させる。First, pitch or carbonizable thermoplastic resin is heated to a temperature above its softening point to melt it, and boron carbide powder is added and mixed to uniformly disperse it.
次にこの溶融ピッチ組成物または溶融樹脂組成物と、粉
状黒鉛とをミキサーで加熱しつつ混練し、黒鉛表面を十
分コーティングして造粒する。Next, this molten pitch composition or molten resin composition and powdered graphite are kneaded while being heated in a mixer, and the graphite surface is sufficiently coated and granulated.
この場合炭化ホウ素が分散されたピッチ類または炭化性
熱可塑性樹脂を一度冷却して固化し、粉砕して得た組成
物粉末を粉状黒鉛に加えてミキサーで混合しつつ加熱溶
融混練して造粒物を得る方法であってもよい。In this case, the pitch or carbonizable thermoplastic resin in which boron carbide is dispersed is once cooled and solidified, and the resulting composition powder is added to powdered graphite and mixed with a mixer while being heated, melted and kneaded. It may also be a method of obtaining granules.
またピッチ類又は炭化性熱可塑性樹脂の使用量は黒鉛に
対して１０〜３０重量％、より好ましくは１２〜２０重
量％である。これは上記使用量が黒鉛に対して１０重量
％未満では黒鉛の被覆効果が不十分となって高い耐酸化
性が得られず、一方３０重量％以上であると黒鉛の量が
相対的に減少して耐火物の耐酸化性が不十分になるから
である。The amount of pitches or carbonizable thermoplastic resin used is 10 to 30% by weight, more preferably 12 to 20% by weight based on graphite. This is because if the amount used is less than 10% by weight of graphite, the coating effect of graphite will be insufficient and high oxidation resistance will not be obtained, whereas if it is more than 30% by weight, the amount of graphite will be relatively reduced. This is because the oxidation resistance of the refractory becomes insufficient.
ざらに炭化ホウ素の使用量は黒鉛に対して３〜２０重量
％が好ましく、より好ましくは５〜１５重量％である。The amount of boron carbide used is preferably 3 to 20% by weight, more preferably 5 to 15% by weight based on graphite.
［実施例］
軟化点１４５℃のコールタールピッチ１５部に、３００
メツシユ以下の炭化ホウ素粉末１５部を２５０℃で溶融
分散させ、冷却後１ｍｍ以下に粉砕した。５０メツシユ
以下、純度９９重量％の天然燐状黒鉛７０部と上記の粉
砕物をよく混合し、次に１６０〜２２０℃に加熱しなが
ら混練し、冷却した後２■以下に篩分けして、１５重量
％の炭化ホウ素を含有する本発明の黒鉛造粒物を得た。[Example] To 15 parts of coal tar pitch with a softening point of 145°C, 300
15 parts of boron carbide powder of a size smaller than a mesh was melted and dispersed at 250°C, cooled, and then ground to a size of 1 mm or smaller. 50 mesh or less, 70 parts of natural phosphorous graphite with a purity of 99% by weight and the above pulverized product are thoroughly mixed, then kneaded while heating to 160 to 220 ° C. After cooling, sieved to a size of 2 cm or less, A graphite granule of the present invention containing 15% by weight of boron carbide was obtained.
上記黒鉛造粒物２０部とマグネシア８０部を混合し、バ
インダーとしてフェノール樹脂を加えて成形し、２００
℃で熱処理した後２０ｎ＋ｍ角に切り出し本発明試験片
とした。該試験片を１４００℃の電気炉中で２時間加熱
した後、酸化層の厚みを測定した。結果はＮ１表に示す
。20 parts of the above graphite granules and 80 parts of magnesia were mixed, phenol resin was added as a binder and molded.
After heat treatment at ℃, the sample was cut into 20n+m square pieces to obtain test pieces of the present invention. After heating the test piece in an electric furnace at 1400° C. for 2 hours, the thickness of the oxidized layer was measured. The results are shown in Table N1.
また前記黒鉛造粒物２０部の代りに、鱗状黒鉛２０部又
は鱗状黒鉛１７部と炭化ホウ素３部とを用いた以外は上
記本発明試験片と同様にして酸化層の厚みを測定した。Further, the thickness of the oxidized layer was measured in the same manner as the test piece of the present invention, except that 20 parts of flaky graphite or 17 parts of flaky graphite and 3 parts of boron carbide were used instead of 20 parts of the graphite granules.
結果は第１表に併記する。The results are also listed in Table 1.
弔
表
第１表から本発明に係る試験片は耐酸化性が非常に優れ
ていることがわかる。It can be seen from Table 1 that the test pieces according to the present invention have very excellent oxidation resistance.
これに対し比較例１は炭化ホウ素を含有しない耐火物で
あり、耐酸化性に劣る。また比較例２は本発明試験片と
同量の炭化ホウ素を含有しているが単に各成分を混合し
たものである為耐酸化性が不十分である。On the other hand, Comparative Example 1 is a refractory that does not contain boron carbide and has poor oxidation resistance. Comparative Example 2 contains the same amount of boron carbide as the test piece of the present invention, but it has insufficient oxidation resistance because it is simply a mixture of each component.
［発明の効果］
本発明は以上の様に構成されているので、耐火物の高温
耐酸化性および耐食性を大幅に改善する黒鉛造粒物の提
供ができることとなり、高温高熱装置産業における経済
性の向上に大きく寄与することが可能となった。[Effects of the Invention] Since the present invention is configured as described above, it is possible to provide a graphite granule that significantly improves the high-temperature oxidation resistance and corrosion resistance of refractories, thereby improving economic efficiency in the high-temperature equipment industry. This made it possible to make a significant contribution to improvement.
手続補正書 平成 （自発） ２年 石丁マ９日Procedural amendment Heisei (spontaneous) 2nd year Ishichoma 9th
Claims (1)
または炭化性熱可塑性樹脂によってコーティングしたも
のであることを特徴とする耐火物用耐酸化性黒鉛造粒物
。(1) Oxidation-resistant graphite granules for refractories, characterized in that graphite powder is coated with pitch or carbonizable thermoplastic resin in which boron carbide powder is dispersed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2120489A JPH0416545A (en) | 1990-05-09 | 1990-05-09 | Oxidation resistance graphite granulation matter for refractory |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2120489A JPH0416545A (en) | 1990-05-09 | 1990-05-09 | Oxidation resistance graphite granulation matter for refractory |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0416545A true JPH0416545A (en) | 1992-01-21 |
Family
ID=14787454
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2120489A Pending JPH0416545A (en) | 1990-05-09 | 1990-05-09 | Oxidation resistance graphite granulation matter for refractory |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0416545A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04124056A (en) * | 1990-09-13 | 1992-04-24 | Shinagawa Refract Co Ltd | Carbon-containing refractory |
| US8921470B2 (en) | 2007-05-11 | 2014-12-30 | Toyo Tire & Rubber Co., Ltd. | Rubber composition for adhering steel cord |
-
1990
- 1990-05-09 JP JP2120489A patent/JPH0416545A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04124056A (en) * | 1990-09-13 | 1992-04-24 | Shinagawa Refract Co Ltd | Carbon-containing refractory |
| US8921470B2 (en) | 2007-05-11 | 2014-12-30 | Toyo Tire & Rubber Co., Ltd. | Rubber composition for adhering steel cord |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112028613B (en) | Magnesia carbon brick using catalyst-added phenolic resin | |
| CN108017376A (en) | A kind of magnesia carbon brick and its production method | |
| CN101274854B (en) | Fireproof carbon-bonded magnesia brick and method for the production thereof | |
| JP4394144B2 (en) | Carbon-containing refractory, method for producing the same, and pitch-containing refractory material | |
| JPS5823351B2 (en) | Monolithic refractories | |
| JPS6128630B2 (en) | ||
| CN104844239A (en) | Environmental-friendly magnesia carbon brick and production method thereof | |
| JPH0416545A (en) | Oxidation resistance graphite granulation matter for refractory | |
| JPS6086078A (en) | Spray material for thermal repairment | |
| JPS6215507B2 (en) | ||
| KR100613259B1 (en) | A zirconia-carbon refractory composition | |
| KR101865571B1 (en) | Ceramic joining material for repairing carbonaceous block | |
| JP2702510B2 (en) | Preparation method of raw materials for carbon-containing refractories | |
| JPH0413316B2 (en) | ||
| JPH0146473B2 (en) | ||
| JPS624355B2 (en) | ||
| CN115073142B (en) | Magnesia carbon brick for electric furnace and preparation method thereof | |
| JP2517192B2 (en) | Resin-bonded carbon-containing amorphous refractory | |
| CN101033145B (en) | Mortar for building blast furnace stack graphite brick | |
| JPS6374973A (en) | Kiln repairing material | |
| JP2774839B2 (en) | Graphite-containing refractory coating material and graphite-containing refractory | |
| JPS62176963A (en) | Filling material around blast furnace tapping hole constructed by flow-in | |
| JP2774249B2 (en) | Coating materials for carbon-containing bricks | |
| JPH0388878A (en) | Graphite granulated product for amorphous refractory | |
| JPS6357380B2 (en) |