JPS5969413A - Furnace for manufacturing expanded graphite - Google Patents
Furnace for manufacturing expanded graphiteInfo
- Publication number
- JPS5969413A JPS5969413A JP57179620A JP17962082A JPS5969413A JP S5969413 A JPS5969413 A JP S5969413A JP 57179620 A JP57179620 A JP 57179620A JP 17962082 A JP17962082 A JP 17962082A JP S5969413 A JPS5969413 A JP S5969413A
- Authority
- JP
- Japan
- Prior art keywords
- graphite
- furnace
- expanded graphite
- silica
- soln
- 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
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 45
- 229910002804 graphite Inorganic materials 0.000 title claims abstract description 45
- 239000010439 graphite Substances 0.000 title claims abstract description 45
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 14
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 16
- 150000001875 compounds Chemical class 0.000 claims abstract description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 14
- 239000000377 silicon dioxide Substances 0.000 claims description 7
- 239000012784 inorganic fiber Substances 0.000 claims description 6
- 239000011247 coating layer Substances 0.000 claims description 5
- 239000011229 interlayer Substances 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 abstract description 12
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 abstract description 6
- 239000000463 material Substances 0.000 abstract description 5
- 239000007800 oxidant agent Substances 0.000 abstract description 3
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 abstract description 2
- 239000011248 coating agent Substances 0.000 abstract description 2
- 238000000576 coating method Methods 0.000 abstract description 2
- 229910017604 nitric acid Inorganic materials 0.000 abstract description 2
- 239000012286 potassium permanganate Substances 0.000 abstract description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 2
- 239000000835 fiber Substances 0.000 abstract 2
- -1 graphite compound Chemical class 0.000 abstract 1
- 239000012212 insulator Substances 0.000 abstract 1
- 230000007774 longterm Effects 0.000 abstract 1
- 238000005507 spraying Methods 0.000 abstract 1
- 239000002253 acid Substances 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- 239000011810 insulating material Substances 0.000 description 3
- 239000013078 crystal Substances 0.000 description 2
- 238000009830 intercalation Methods 0.000 description 2
- 230000002687 intercalation Effects 0.000 description 2
- 238000003303 reheating Methods 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 235000014036 Castanea Nutrition 0.000 description 1
- 241001070941 Castanea Species 0.000 description 1
- 229910001069 Ti alloy Inorganic materials 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229910021382 natural graphite Inorganic materials 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000012779 reinforcing material Substances 0.000 description 1
- 238000007569 slipcasting Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Landscapes
- Carbon And Carbon Compounds (AREA)
Abstract
Description
【発明の詳細な説明】 本発明は膨張黒鉛製造炉に関する。[Detailed description of the invention] The present invention relates to an expanded graphite production furnace.
一般に膨張黒鉛は、天然黒鉛・キッシュ黒鉛・熱分解黒
鉛など高度に結晶構造の発達した黒鉛を濃硫酸及び硝酸
、濃硫酸及び過マンガン酸カリウム溶液などの強酸化剤
の処理液で酸処理して黒鉛層間化合物を生成させ、水洗
したのち酸処理黒鉛全急速に加熱して黒鉛結晶のＣ軸方
向に膨張処理して得られる。Expanded graphite is generally produced by acid-treating graphite with a highly developed crystal structure, such as natural graphite, Quisch graphite, and pyrolytic graphite, with a treatment solution containing a strong oxidizing agent such as concentrated sulfuric acid, nitric acid, concentrated sulfuric acid, and potassium permanganate solution. It is obtained by generating a graphite intercalation compound, washing with water, and then rapidly heating the acid-treated graphite to expand it in the C-axis direction of the graphite crystal.
従来、膨張黒鉛製造用の加熱炉はガスバーナーによる直
接加熱炉が用いられているが、この直接加熱炉内壁の材
質は８Ｕ８３１Ｏ８又はチタン合金等の耐熱合金を用い
ていた為１０００℃以上の温度で長時間使用することは
、炉材の耐久性の点より不可能とされていた。Conventionally, a direct heating furnace using a gas burner has been used as a heating furnace for producing expanded graphite, but since the inner wall of this direct heating furnace is made of a heat-resistant alloy such as 8U831O8 or titanium alloy, it cannot be heated at temperatures above 1000℃. It was considered impossible to use it for a long time due to the durability of the furnace material.
ガスバーナーによる直接加熱炉では、熱の付与が瞬間的
である為１０００℃以下の温度での加熱では膨張に必要
な熱が不十分となり、一部で未膨張黒鉛が発生する場合
があった。この為膨張黒鉛をシートに成形した後、フレ
ームで再加熱し未膨張黒鉛を膨張させる必要があった。In a direct heating furnace using a gas burner, heat is applied instantaneously, so heating at a temperature of 1000° C. or lower does not provide enough heat for expansion, and unexpanded graphite may be generated in some parts. For this reason, it was necessary to form the expanded graphite into a sheet and then reheat it in a frame to expand the unexpanded graphite.
一方、膨張の為の加熱温度を１２００℃以上にすると、
熱量が十分である為直接加熱膨張においても未膨張を発
生せず、再加熱処理の必要がなくなる。しかし、１２０
０℃以上の高温で連続使用するためには鋼材では耐久性
に無理がある。発明者等は種々検討した結果、加熱炉の
内壁を耐熱性のよいシリカアルミナ系の塗布物層又はシ
リカアルミナ系無機繊維の成形品を用いる構成にするこ
とにより１２００℃以上の加熱膨張を可能とし、再加熱
処理を行なわずに良好な黒鉛を得ることが可能であるこ
とを見出した。On the other hand, if the heating temperature for expansion is 1200℃ or higher,
Since the amount of heat is sufficient, no unexpansion occurs even in direct thermal expansion, eliminating the need for reheating treatment. However, 120
Steel materials are not durable enough for continuous use at high temperatures of 0°C or higher. As a result of various studies, the inventors have found that heating expansion of 1200°C or higher is possible by configuring the inner wall of the heating furnace with a coated layer of silica-alumina or a molded product of silica-alumina inorganic fiber, which has good heat resistance. discovered that it is possible to obtain good graphite without reheating.
本発明は９層間化合物を形成した黒鉛をバーナーの炎で
加熱膨張させる炉において、内壁にシリカ・アルミナ系
塗布物層又はシリカ・アルミナ系無機繊維の成形品を用
いた膨張黒鉛製造炉に関する。The present invention relates to an expanded graphite production furnace that uses a silica/alumina coating layer or a molded product of silica/alumina inorganic fibers on the inner wall in a furnace that heats and expands graphite on which nine interlayer compounds have been formed using a burner flame.
本発明の膨張黒鉛製造炉は袋管の閉管部に層間化合物を
形成した黒鉛（酸処理黒鉛）吹き出し用のノズル及びガ
スバーナーを配設したもので９袋管の内部にノズルの先
端及びガスバーナーの先端を近接させて配置し、ガスバ
ーナーにより炉内を所定＋８度に保持し、ガスバーナー
よりのフレームに対してノズルより酸処理黒鉛を吹き付
けて酸処理黒鉛を膨張させる。炉内の温度は未膨張黒鉛
が残らないように１２００℃以上にすることが好寸しい
。捷だ炉の内壁は高温での繰返し便用に耐えるノリ力・
アルミナ系塗布物層又はノリ力・アルミナ系無機繊維の
成形品を使用する。ンリノノ・アルミナ系の塗布物層は
・ノリ力及びアルミナ金主成分とする泥漿を繰返し炉の
内壁に塗布したり、あらかじめ上記泥漿を用いてスリッ
プキャスティング法により製し７た袋管を所定寸法に加
工する等により得る。The expanded graphite manufacturing furnace of the present invention has a nozzle and a gas burner for blowing out graphite (acid-treated graphite) in which an intercalation compound has been formed in the closed part of a bag tube. The tips of the two are placed close to each other, the inside of the furnace is maintained at a predetermined temperature of +8 degrees by a gas burner, and acid-treated graphite is sprayed from a nozzle onto the frame from the gas burner to expand the acid-treated graphite. The temperature in the furnace is preferably 1200° C. or higher so that no unexpanded graphite remains. The inner wall of the shredder has a high adhesive strength that can withstand repeated use at high temperatures.
Use an alumina-based coating layer or a molded product of alumina-based inorganic fibers. The alumina-based coating layer is made by repeatedly coating the inner wall of the furnace with glue and a slurry mainly composed of alumina gold, or by using the slurry described above in advance by the slip casting method to form a bag tube into a predetermined size. Obtained by processing etc.
シリカ・アルミナ系無機繊維の成形品は、シリカ及びア
ルミナを主成分とする無機繊維と無機結合剤とを混合し
たのち成形及び焼成したものを用いる。The silica/alumina-based inorganic fiber molded product is obtained by mixing inorganic fibers mainly composed of silica and alumina with an inorganic binder, then molding and firing.
以下比較例及び実施例について説明する。Comparative examples and examples will be explained below.
比較例 第１図は従来の膨張黒鉛製造炉の要部断面図で。Comparative example Figure 1 is a sectional view of the main parts of a conventional expanded graphite production furnace.
厚さ５Ｍの５Ｕ８３１０Ｓ耐熱鋼板１の横形円筒状の袋
管内壁の外側に厚さ５０間の保温材（イソライトエ栗製
、商品名カオウール）を貼り付けた。A heat insulating material (manufactured by Isolite Chestnut, trade name: Kao Wool) with a thickness of 50 mm was pasted on the outside of the inner wall of a horizontal cylindrical bag tube of a 5M thick 5U8310S heat-resistant steel plate 1.
炉内温度はガスバーナー３によｐ１０００℃以下に１．
５節し、ノズル４から酸処理黒鉛をフレーム９に吹き付
けて」１記黒鉛を瞬間的に膨張させ取出し１−１５より
取出す。この炉で得られた膨張黒鉛は６チの未膨張黒鉛
を含有していた。The temperature inside the furnace is reduced to below 1000°C using the gas burner 3.
5, and spray acid-treated graphite onto the frame 9 from the nozzle 4 to cause the graphite described in 1 to expand instantaneously and take it out from the take-out 1-15. The expanded graphite obtained in this furnace contained 6 inches of unexpanded graphite.
実施例
第２図は本発明の一実施例になる横形円筒状の膨張黒鉛
製造炉の要部断面図である。厚さ５０間のシリカ・アル
ミナ系塗布物層（旭硝子製、商品名キャスターＣＡ−１
６）からなる耐熱内壁８の外側に保温材７（旭硝子製、
商品名軽量キャスターＬＣＩＯ）を巻き付け、更に最外
部は炉の強度を保つ為に４．５咽の５Ｓ４１鋼板からな
る補強材６を配した構造とした。この炉の炉内温度をガ
スバーナー３により１５００℃に保持し、比較例と同様
にしてノズル４から酸処理黒鉛をフレーノ、９に吹き付
けて膨張させた。得られた膨張黒鉛中には未膨張のもの
は見られなかった。Embodiment FIG. 2 is a sectional view of a main part of a horizontal cylindrical expanded graphite production furnace according to an embodiment of the present invention. Silica/alumina coating layer with a thickness of 50 mm (manufactured by Asahi Glass, product name: Caster CA-1)
Heat insulating material 7 (manufactured by Asahi Glass,
Lightweight casters (trade name: LCIO) were wrapped around the furnace, and a reinforcing material 6 made of 5S41 steel plate with a diameter of 4.5 mm was placed on the outermost side to maintain the strength of the furnace. The temperature inside the furnace was maintained at 1500° C. by the gas burner 3, and acid-treated graphite was blown onto the flenograph 9 from the nozzle 4 to expand it in the same manner as in the comparative example. No unexpanded graphite was found in the expanded graphite obtained.
本発明によれば炉内温度を従来炉よりも高くすることが
出来るので未膨張の黒鉛を含むことがなく従ってシート
等に成形後の再膨張処理工程が不要になる。According to the present invention, since the temperature inside the furnace can be made higher than that of conventional furnaces, unexpanded graphite is not contained, and therefore, a re-expansion treatment step after forming into a sheet or the like is not necessary.
また１本発明の膨張黒鉛製造炉は２年間１更用しても劣
化せず従来の膨張黒鉛製造炉の内壁の寿命約５０時間よ
シも耐久性の点で格段に優れる。Furthermore, the expanded graphite manufacturing furnace of the present invention does not deteriorate even after being used once for two years, and has a much superior durability compared to the 50-hour lifespan of the inner walls of conventional expanded graphite manufacturing furnaces.
第１図は従来の膨張黒鉛製造炉の要部断面図及び第２図
は本発明の一実施例になる膨張黒鉛製造炉の要部断面図
である。
符号の説明
■・・耐熱鋼板 ２・・・保温材３・・・ガスバ
ーナー ４・・・ノズル５・・・取出し口 ６
・・・補強材７・・保温月 ８・・・耐熱内壁
９・・・フレームFIG. 1 is a sectional view of a main part of a conventional expanded graphite manufacturing furnace, and FIG. 2 is a sectional view of a main part of an expanded graphite manufacturing furnace according to an embodiment of the present invention. Explanation of symbols ■ Heat-resistant steel plate 2 Heat insulating material 3 Gas burner 4 Nozzle 5 Outlet 6
...Reinforcement material 7...Heat insulation 8...Heat-resistant inner wall 9...Frame
Claims (1)
張させる炉において、内壁にシリカ・アルミナ系塗布物
層又はシリカ・アルミナ系無機繊維の成形品を用いた膨
張黒鉛製造炉。1. An expanded graphite manufacturing furnace that uses a silica/alumina coating layer or a molded product of silica/alumina inorganic fibers on the inner wall in a furnace that heats and expands graphite with an interlayer compound formed thereon using a burner flame.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57179620A JPS5969413A (en) | 1982-10-13 | 1982-10-13 | Furnace for manufacturing expanded graphite |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57179620A JPS5969413A (en) | 1982-10-13 | 1982-10-13 | Furnace for manufacturing expanded graphite |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5969413A true JPS5969413A (en) | 1984-04-19 |
| JPS6261528B2 JPS6261528B2 (en) | 1987-12-22 |
Family
ID=16068937
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57179620A Granted JPS5969413A (en) | 1982-10-13 | 1982-10-13 | Furnace for manufacturing expanded graphite |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5969413A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5017358A (en) * | 1988-09-22 | 1991-05-21 | Dir. General, Agency Of Industrial Science And Technology | Preparation of elastic graphite materials |
| WO2002064501A1 (en) * | 2001-02-12 | 2002-08-22 | Vladimir Apollonovich Usoshin | Method and device for producing a carbon sorbing agent |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3584846A (en) * | 1969-11-14 | 1971-06-15 | Lyle E Mccoy | Heating apparatus for elongate material |
-
1982
- 1982-10-13 JP JP57179620A patent/JPS5969413A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3584846A (en) * | 1969-11-14 | 1971-06-15 | Lyle E Mccoy | Heating apparatus for elongate material |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5017358A (en) * | 1988-09-22 | 1991-05-21 | Dir. General, Agency Of Industrial Science And Technology | Preparation of elastic graphite materials |
| WO2002064501A1 (en) * | 2001-02-12 | 2002-08-22 | Vladimir Apollonovich Usoshin | Method and device for producing a carbon sorbing agent |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6261528B2 (en) | 1987-12-22 |
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