JPS6126327Y2 - - Google Patents
Info
- Publication number
- JPS6126327Y2 JPS6126327Y2 JP13276981U JP13276981U JPS6126327Y2 JP S6126327 Y2 JPS6126327 Y2 JP S6126327Y2 JP 13276981 U JP13276981 U JP 13276981U JP 13276981 U JP13276981 U JP 13276981U JP S6126327 Y2 JPS6126327 Y2 JP S6126327Y2
- Authority
- JP
- Japan
- Prior art keywords
- gas
- furnace
- section
- sintering
- atmosphere
- 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
Links
- 238000005245 sintering Methods 0.000 claims description 33
- 238000001816 cooling Methods 0.000 claims description 21
- 238000002485 combustion reaction Methods 0.000 claims description 20
- 239000003054 catalyst Substances 0.000 claims description 13
- 239000004215 Carbon black (E152) Substances 0.000 claims description 7
- 229930195733 hydrocarbon Natural products 0.000 claims description 7
- 150000002430 hydrocarbons Chemical class 0.000 claims description 7
- 239000007789 gas Substances 0.000 description 71
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 8
- 238000006243 chemical reaction Methods 0.000 description 7
- 238000005261 decarburization Methods 0.000 description 7
- 239000000203 mixture Substances 0.000 description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 5
- 229910052799 carbon Inorganic materials 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000003197 catalytic effect Effects 0.000 description 4
- 239000000567 combustion gas Substances 0.000 description 4
- 238000000354 decomposition reaction Methods 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 4
- 239000000956 alloy Substances 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 206010013786 Dry skin Diseases 0.000 description 2
- 239000001273 butane Substances 0.000 description 2
- IJDNQMDRQITEOD-UHFFFAOYSA-N n-butane Chemical compound CCCC IJDNQMDRQITEOD-UHFFFAOYSA-N 0.000 description 2
- OFBQJSOFQDEBGM-UHFFFAOYSA-N n-pentane Natural products CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 239000003381 stabilizer Substances 0.000 description 2
- 230000003746 surface roughness Effects 0.000 description 2
- XOOUIPVCVHRTMJ-UHFFFAOYSA-L zinc stearate Chemical compound [Zn+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O XOOUIPVCVHRTMJ-UHFFFAOYSA-L 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 238000009770 conventional sintering Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 230000029052 metamorphosis Effects 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Description
【考案の詳細な説明】
本考案は燃結炉とりわけ鉄系圧粉体の燃結炉に
関するものである。[Detailed Description of the Invention] The present invention relates to a combustion furnace, particularly a combustion furnace for iron-based green compacts.
鉄系圧粉体を工業的規摸で燃結する場合、一般
的に予熱炉と燃結炉および冷却筒を炉芯管により
トンネル状に連続させ、プツシヤーなどにより圧
粉体を間欠点に送り込み、予熱炉でステアリン酸
亜鉛などのバインダを除去し、次いで燃結温度に
加熱し、冷却筒を通る間に冷却する手法が採られ
ている。 When combusting iron-based green compacts on an industrial scale, the preheating furnace, sintering furnace, and cooling tube are generally connected in a tunnel-like manner through a furnace core tube, and the green compacts are fed into the intermediate defects using a pusher or the like. , a method is adopted in which binders such as zinc stearate are removed in a preheating furnace, then heated to sintering temperature, and cooled while passing through a cooling tube.
このような鉄系圧粉体の燃結処理において重要
な点は雰囲気管理ことにカーボンポテンシヤルの
調整であり、この目的のため従来では炉外に触媒
炉を設置し、この触媒炉でブタンガスなどの炭化
水素系ガス（CmHn）にエアを混合して一種の不
完全燃焼させて吸熱形変成ガスを作り、これを予
熱ゾーン、燃結ゾーンおよび冷却ゾーンに供給し
ていた。 Important points in the combustion process of iron-based green compacts are atmosphere control and carbon potential adjustment.For this purpose, conventionally, a catalytic furnace was installed outside the furnace, and this catalytic furnace was used to combust butane gas, etc. Hydrocarbon gas (CmHn) was mixed with air and subjected to a type of incomplete combustion to create endothermic transformed gas, which was then supplied to the preheating zone, combustion zone, and cooling zone.
このような手段によれば、圧粉体のカーボン量
に見合つた雰囲気となるため、脱炭防止効果がよ
いメリツトが得られるが、最近のように燃結品の
高密度化、合金化、形状の多様化が進んだ場合に
製品に肌あれが生じ、しばしばクラツクや変形を
起すなどの良品前留りが低下するという問題があ
つた。 According to such a method, an atmosphere suitable for the amount of carbon in the green compact is created, which has the advantage of preventing decarburization. As the variety of products advances, products become rough, often causing cracks and deformation, leading to a decline in the number of good products.
本考案はこのような事情から研究を重ねて考案
されたもので、その目的とするところは比較的簡
単な構造で肌荒れと脱炭を効果的に防止して焼結
を行うことができる炉を提供することにある。 This invention was devised after repeated research in light of these circumstances, and its purpose is to create a furnace that has a relatively simple structure and can perform sintering while effectively preventing rough skin and decarburization. It is about providing.
この目的のため本考案者は焼結製品の肌荒れの
発生について検討を加えた。その結果、焼結製品
の肌荒れは、従来では脱ろう時における圧粉体の
昇温スピードが早すぎることやステアリン酸亜鉛
の急激な分解や脱ろうゾーンでの不完全な脱ろう
状態の焼結ゾーンへの持ち込みが主原因と考えら
れていたが、実は雰囲気ガスの組成とくに脱ろう
ゾーンの吸熱形雰囲気が主原因であることがわか
つた。すなわち脱ろうゾーンの吸熱形雰囲気中の
COが圧粉体と反応してCO→CO2＋Ｃなる分解反
応を起し、しかもこの反応は500〜600℃の脱ろう
温度域で生じやすく、かつこの反応は圧粉体の成
分組成のNi、Fe、ZnOが触媒作用をはたすため
ますます顕著になるものである。 For this purpose, the present inventor investigated the occurrence of surface roughness in sintered products. As a result, the surface roughness of sintered products has conventionally been caused by the temperature rising speed of the green compact during dewaxing being too fast, rapid decomposition of zinc stearate, and sintering in an incomplete dewaxing state in the dewaxing zone. It was thought that the main cause was the introduction of heat into the dewaxing zone, but it turned out that the main cause was actually the composition of the atmospheric gas, especially the endothermic atmosphere in the dewaxing zone. In other words, in the endothermic atmosphere of the dewaxing zone,
CO reacts with the green compact to cause a decomposition reaction of CO→CO 2 +C. Moreover, this reaction tends to occur in the dewaxing temperature range of 500 to 600°C, and this reaction is caused by the Ni , Fe, and ZnO play a catalytic role, which is becoming increasingly prominent.
〓〓〓〓
そこで、本考案は、焼結部と冷却部の雰囲気を
吸熱形ガス雰囲気にして脱炭防止を図ると共に、
脱ろう部の雰囲気を発熱形ガス雰囲気と吸熱形ガ
ス雰囲気の混合雰囲気に構成して脱ろう促進と
COの分解防止により肌荒れ防止を図るように
し、しかもそれら焼結部用雰囲気と脱ろう部用雰
囲気を単一の変成炉にて生成供給するようにした
ものである。〓〓〓〓
Therefore, the present invention aims to prevent decarburization by creating an endothermic gas atmosphere in the sintering section and cooling section, and
The atmosphere in the dewaxing section is configured to be a mixed atmosphere of exothermic gas atmosphere and endothermic gas atmosphere to promote dewaxing.
This system aims to prevent skin roughness by preventing the decomposition of CO, and moreover, the atmosphere for the sintering section and the atmosphere for the dewaxing section are generated and supplied by a single shift furnace.
以下本考案を添付図面に基いて説明する。 The present invention will be explained below with reference to the accompanying drawings.
第１図と第２図は本考案に係る焼結炉の一実施
例を示すもので、１は予熱炉（脱ろう炉）で耐火
物炉体１１の内側に炉芯管１２が貫設され、炉芯
管１２のまわりにはヒータ１３が対設されてお
り、炉芯管１２にはフレームカーテン１４を備え
る入口部１５が延設されている。２は焼結炉であ
り、本実施例ではコンベア式連続炉としているた
め耐火物炉体１６の内側に前記炉芯管１２と連通
する炉芯管１２′が内挿され、その外周域にヒー
タ１３′が設けられている。３は前記焼結炉３に
連続した冷却部であり、水冷ジヤケツトによる２
重筒として構成され、その端部にはフレームカー
テン１４′を有する出口部ないし置換室１７が設
けられている。 1 and 2 show an embodiment of the sintering furnace according to the present invention, and 1 is a preheating furnace (dewaxing furnace) in which a furnace core tube 12 is inserted through the inside of a refractory furnace body 11. A heater 13 is provided around the furnace core tube 12, and an inlet portion 15 having a frame curtain 14 extends from the furnace core tube 12. Reference numeral 2 denotes a sintering furnace, and in this embodiment, it is a conveyor-type continuous furnace, so a furnace core tube 12' communicating with the furnace core tube 12 is inserted inside the refractory furnace body 16, and a heater is installed in the outer peripheral area of the furnace core tube 12'. 13' is provided. 3 is a cooling section that is continuous with the sintering furnace 3, and is equipped with a water-cooled jacket.
It is constructed as a double cylinder, at the end of which an outlet or replacement chamber 17 with a frame curtain 14' is provided.
上記のような構造は従来の焼結炉と同様である
が、本考案はまず冷却部３の後部寄りの位置にガ
ス導入部５を接続すると共に、予熱炉１と焼結炉
２のあいだの炉芯管部分にもガス導入部４を接続
する。そして、炉外の適所に変成炉６を設け、こ
の変成炉６に炭化水素系ガスG1とエアの混合ガ
スを完全燃焼させるガスバーナ７を内挿した燃焼
部８を耐火囲壁８′により形成すると共に、Niな
どの触媒を充填した触媒筒９を前記燃焼部８を貫
くようにして設け、燃焼部８の一部に設けたガス
取出し口９′に配管１８を接続すると共に、この
配管１８にガス流量安定装置１９とガス冷却器１
０を介在させ、さらにこれより先の配管を制御弁
２０を介して前記予熱炉１と焼結炉２のあいだに
設けたガス導入部４と接続する。 The above structure is the same as that of the conventional sintering furnace, but the present invention first connects the gas introduction part 5 to a position near the rear of the cooling part 3, and also connects the gas introduction part 5 between the preheating furnace 1 and the sintering furnace 2. A gas introduction section 4 is also connected to the furnace core tube section. Then, a shift furnace 6 is installed at a suitable location outside the furnace, and a combustion section 8 is formed by a fireproof surrounding wall 8', in which a gas burner 7 for completely burning a mixture of hydrocarbon gas G1 and air is inserted. At the same time, a catalyst tube 9 filled with a catalyst such as Ni is provided so as to pass through the combustion section 8, and a pipe 18 is connected to a gas outlet 9' provided in a part of the combustion section 8. Gas flow stabilizer 19 and gas cooler 1
0 interposed therebetween, and the piping beyond this is connected via a control valve 20 to a gas introduction section 4 provided between the preheating furnace 1 and the sintering furnace 2.
また、前記触媒筒９の入口側に炭化水素系ガス
（CmHn）もしくはこれに水分ないし水素ガスを
添加したエンリツチ用ガスG3の供給配管２１を
接続すると共に、触媒筒９の出口側を主配管２２
により前記冷却部３のガス導入部５と接続し、さ
らに前記供給配管２１と配管１８におけるガス冷
却器１０より前方適所を制御弁２５を備えた分岐
配管２３で接続している。 In addition, a supply pipe 21 for enrichment gas G 3 , which is hydrocarbon gas (CmHn) or water or hydrogen gas added thereto, is connected to the inlet side of the catalyst cylinder 9, and a main pipe is connected to the outlet side of the catalyst cylinder 9. 22
It is connected to the gas introduction section 5 of the cooling section 3, and is further connected to the supply pipe 21 at a suitable position in front of the gas cooler 10 in the pipe 18 by a branch pipe 23 equipped with a control valve 25.
なお、ガス冷却器１０には冷凍機や除湿機など
を付属させてもよく、あるいは図示のように配管
１８にバイパス管１８′を付設し、非脱水ままで
ガス導入部４に導けるようにしてもよい。また必
要に応じ予熱炉１と焼結炉２のあいだにガス量コ
ントロール用排気部２４を設けてもよい。 Note that the gas cooler 10 may be attached with a refrigerator, a dehumidifier, etc., or a bypass pipe 18' may be attached to the piping 18 as shown in the figure, so that the gas can be guided to the gas introduction part 4 without dehydration. Good too. Further, if necessary, an exhaust part 24 for gas amount control may be provided between the preheating furnace 1 and the sintering furnace 2.
本考案による焼結炉は上記のような構成からな
るので、鉄系圧粉体を焼結するにあたつては、ト
レイなどに圧粉体を装填してコンベアベルトある
いはプシヤーなどの送り手段により入口部１５か
ら装入する一方、変成炉６のガスバーナ７により
炭化水素系ガスG1とエアとの混合ガスを燃焼部
８で完全燃焼させるものであり、原料ガスがブタ
ンガスの場合、燃焼部８には2C4H10＋13O2＋
49N2→8CO2＋10H2O＋49N2の反応が生じる。こ
の完全燃焼ガスG2はガス取出し口９′、配管１８
を通り、ガス流量安定装置１９で定量ずつ送給さ
れるように調整されたのち、ガス冷却器１０で冷
却されることにより脱水されるかあるいはバイパ
ス管１８′を通つて非脱水のまま送られ、いずれ
の場合も発熱形雰囲気ガスとして予熱炉１と焼結
炉２のあいだのガス導入部４を通して炉芯管中に
連続供給される。 Since the sintering furnace according to the present invention has the above-mentioned configuration, when sintering iron-based powder compacts, the powder compacts are loaded onto a tray or the like and transported by a conveyor belt or pusher or other feeding means. While charging from the inlet section 15, the mixed gas of hydrocarbon gas G1 and air is completely combusted in the combustion section 8 by the gas burner 7 of the shift furnace 6. When the raw material gas is butane gas, the combustion section 8 is 2C 4 H 10 +13O 2 +
The reaction 49N 2 →8CO 2 +10H 2 O + 49N 2 occurs. This complete combustion gas G 2 is sent to the gas outlet 9' and to the pipe 18.
The gas is adjusted to be fed in fixed quantities by the gas flow rate stabilizer 19, and then dehydrated by being cooled by the gas cooler 10, or sent undehydrated through the bypass pipe 18'. In either case, the exothermic atmospheric gas is continuously supplied into the furnace core tube through the gas introduction section 4 between the preheating furnace 1 and the sintering furnace 2.
このとき完全燃焼ガスは制御弁２１，２５によ
り所要割合ずつ（たとえば半分ずつ）に分配さ
れ、一方はさきのようにガス導入部４から予熱炉
１と焼結炉２のあいだのゾーンに供給され、他方
は分岐配管２２を通して触媒筒９の入口側に送入
され、その手前で必要に応じてエンリツチされた
のち触媒中を通過して変成される。この変成時の
熱源はさきに述べた燃焼炉８におけるガス完全燃
焼熱であるため合理的であり、かくして変成され
た吸熱形ガスG4は主配管２２を通して冷却部３
のガス導入部５に連続供給される。 At this time, the complete combustion gas is distributed into required proportions (for example, in half) by the control valves 21 and 25, and one is supplied from the gas introduction part 4 to the zone between the preheating furnace 1 and the sintering furnace 2 as before. The other one is sent to the inlet side of the catalyst cylinder 9 through the branch pipe 22, enriched as necessary before that, and then passed through the catalyst to be transformed. It is reasonable that the heat source during this metamorphosis is the heat of complete combustion of the gas in the combustion furnace 8 mentioned earlier, and the endothermic gas G4 thus metamorphosed is passed through the main pipe 22 to the cooling section 3.
The gas is continuously supplied to the gas introduction section 5 of.
そして、冷却部３のガス導入部５に供給された
吸熱形雰囲気ガスG4は、入口部１５におけるフ
レームカーテン１４による吸引作用で冷却部３か
ら焼結炉２に向かつて流れ、また同吸引作用によ
り予熱炉１と焼結炉２のあいだのガス導入部４か
ら供給された完全燃焼ガス（発熱形雰囲気ガス）
G2も焼結炉２には流入せず、予熱炉１の出口側
から入口側へ向かう流れとなり、これにより予熱
〓〓〓〓
炉１の炉芯管１２の内部は吸熱形雰囲気ガスと発
熱形雰囲気ガスとの混合ガス組成となり、この混
合ガス組成中を圧粉体は連続又は間欠的に移送さ
れながら外部のヒータ１３により加熱されて脱ろ
うが行われる。 The endothermic atmospheric gas G 4 supplied to the gas introduction section 5 of the cooling section 3 flows from the cooling section 3 toward the sintering furnace 2 due to the suction effect of the frame curtain 14 at the inlet section 15, and also due to the suction effect The complete combustion gas (exothermic atmospheric gas) supplied from the gas introduction section 4 between the preheating furnace 1 and the sintering furnace 2
G 2 also does not flow into the sintering furnace 2, but flows from the outlet side to the inlet side of the preheating furnace 1, thereby preheating.
The inside of the furnace core tube 12 of the furnace 1 has a mixed gas composition of an endothermic atmospheric gas and an exothermic atmospheric gas, and the green compact is continuously or intermittently transferred through this mixed gas composition and heated by an external heater 13. The wax is then removed.
従来では脱ろう雰囲気がCOを多量に含む吸熱
形ガス雰囲気で行われるため炭素析出反応が生
じ、しかもこの脱ろうゾーンが500〜600℃の温度
域であるため、上記反応が非常に生じやすかつた
ものであるが、本考案では、前述の如くこの脱ろ
うゾーンに炭化水素系ガスと空気の混合ガスを完
全燃焼させた発熱形ガスを供給し、これを吸熱形
雰囲気と混合することにより吸熱形雰囲気中の
CO2分やH2O分を増加させているため、炭素折出
反応がうまく抑止される。そのため圧粉体が高密
度なものあるいはNi，Cuなどの触媒作用を生じ
やすい合金成分を含むものであつても、これを効
果的に脱ろうすることが可能になつて肌荒れが防
止され、また吸熱形雰囲気を適量含むことから脱
炭も生じない。 Conventionally, the dewaxing atmosphere is an endothermic gas atmosphere containing a large amount of CO, which causes a carbon precipitation reaction, and since this dewaxing zone is in the temperature range of 500 to 600°C, the above reaction is very likely to occur. However, in the present invention, as mentioned above, the dewaxing zone is supplied with an exothermic gas made by completely combusting a mixture of hydrocarbon gas and air, and this is mixed with an endothermic atmosphere to generate an endothermic atmosphere. in the shape of the atmosphere
Since the CO 2 and H 2 O contents are increased, the carbon precipitation reaction is successfully suppressed. Therefore, even if the green compact is high-density or contains alloy components such as Ni and Cu that are likely to cause catalytic action, it is possible to effectively remove wax, preventing rough skin, and Since it contains an appropriate amount of endothermic atmosphere, decarburization does not occur.
次いで圧粉体は焼結炉２に送られ、ここで所定
の焼結温度に加熱されて焼結したのち冷却部３に
おいて冷却される。このときそれらゾーンの雰囲
気は吸熱形であるため脱炭反応が適切に防止さ
れ、カーボンポテンシヤルが良好に調整された製
品となつて出口部１７から取出される。 Next, the green compact is sent to a sintering furnace 2, where it is heated to a predetermined sintering temperature and sintered, and then cooled in a cooling section 3. At this time, since the atmosphere in these zones is endothermic, the decarburization reaction is appropriately prevented, and a product with well-adjusted carbon potential is taken out from the outlet section 17.
以上説明した本考案によるときには、予熱炉と
焼結炉２のあいだおよび冷却部３にそれぞれガス
導入部４，５を設け、炉外には炭化水素系ガスと
空気を完全燃焼させるガスバーナ７を内挿した燃
焼部８と、この燃焼部８を貫く触媒筒９を備えた
変成炉６を設置し、燃焼部８のガス取出し口９′
をガス冷却器１０を介して前記触媒筒９の入口側
に導き、触媒筒９の出口側を冷却部３のガス導入
部５と接続して吸熱形雰囲気ガスを冷却部３およ
び焼結炉２に供給するようになし、さらに前記燃
焼部８のガス取出し口９′をガス冷却器１０を通
して予熱炉１と焼結炉２のあいだのガス導入部４
に接続し、このガス導入部４を通して完全燃焼ガ
ス（発熱形雰囲気ガス）を供給し、脱ろう雰囲気
を吸熱形ガスと発熱形ガスの混合気で構成させる
ようにしたので、冷却部３へ供給した吸熱形ガス
により焼結工程と冷却工程における脱炭防止を図
ることができると共に、脱ろう工程が発熱形ガス
と吸熱形ガスの混合気で行われるため、高密度焼
結や合金焼結などで問題となつていたCO分解反
応を効果的に防止でき、肌荒れを生じさせずまた
脱炭を起させず迅速に脱ろうを行うことができ、
品位品質の良好な高密度焼結品や合金焼結品を生
産できる。しかも、前記のように脱ろうゾーンと
焼結ゾーンの雰囲気を異にするにもかかわらず雰
囲気生成装置が単一の変成炉で足りるため簡易安
価に実施できるというすぐれた効果が得られる。 According to the present invention described above, gas introduction parts 4 and 5 are provided between the preheating furnace and the sintering furnace 2 and in the cooling part 3, respectively, and a gas burner 7 for completely burning hydrocarbon gas and air is installed outside the furnace. A shift furnace 6 equipped with a combustion section 8 and a catalyst cylinder 9 passing through the combustion section 8 is installed, and a gas outlet 9' of the combustion section 8 is installed.
is guided to the inlet side of the catalyst tube 9 via the gas cooler 10, and the outlet side of the catalyst tube 9 is connected to the gas introduction section 5 of the cooling section 3 to supply endothermic atmospheric gas to the cooling section 3 and the sintering furnace 2. Furthermore, the gas outlet 9' of the combustion section 8 is connected to the gas introduction section 4 between the preheating furnace 1 and the sintering furnace 2 through the gas cooler 10.
The complete combustion gas (exothermic atmosphere gas) is supplied through this gas introduction part 4, and the dewaxing atmosphere is made up of a mixture of endothermic gas and exothermic gas, so that it is supplied to the cooling part 3. This endothermic gas can prevent decarburization during the sintering and cooling processes, and since the dewaxing process is performed with a mixture of exothermic and endothermic gas, it can be used for high-density sintering, alloy sintering, etc. It is possible to effectively prevent the CO decomposition reaction that has been a problem in the past, and it is possible to quickly dewax without causing skin roughness or decarburization.
It is possible to produce high-density sintered products and alloy sintered products with good quality. Moreover, even though the atmospheres in the dewaxing zone and the sintering zone are different as described above, a single shift furnace is sufficient as the atmosphere generating device, so an excellent effect can be obtained in that the process can be carried out simply and at low cost.
第１図は本考案に係る焼結炉の一実施例を示す
断面図、第２図は第１図−線にそう断面図で
ある。
１……予熱炉（脱ろう炉）、２……焼結炉、３
……冷却部、４，５……ガス導入部、６……変成
炉、７……ガスバーナ、８……燃焼部、９……触
媒筒、９′……ガス取出し口、１０……ガス冷却
器。
〓〓〓〓
FIG. 1 is a sectional view showing an embodiment of a sintering furnace according to the present invention, and FIG. 2 is a sectional view taken along the line shown in FIG. 1. 1...Preheating furnace (dewaxing furnace), 2...Sintering furnace, 3
... Cooling section, 4, 5 ... Gas introduction section, 6 ... Converter furnace, 7 ... Gas burner, 8 ... Combustion section, 9 ... Catalyst cylinder, 9' ... Gas outlet, 10 ... Gas cooling vessel. 〓〓〓〓
Claims (1)
連設すると共に、予熱炉１と焼結炉２のあいだお
よび冷却部３の適所にそれぞれガス導入部４，５
を設け、炉外には、炭化水素系ガスと空気を完全
燃焼させるガスバーナ７を内挿した燃焼部８と、
この燃焼部８を貫く触媒筒９を備えた変成炉６を
設置し、燃焼部８のガス取出し口９′を冷却器１
０を介して前記触媒筒９の入口側に導き、触媒筒
出口側を前記冷却部３の導入部５と接続して吸熱
形雰囲気ガスを供給するようにする一方、前記燃
焼部８のガス取出し口９′を冷却器１０を通して
予熱炉１と焼結炉２のあいだのガス導入部４に接
続し、このガス導入部４には発熱形雰囲気ガスを
供給するようにしたことを特徴とする燃結炉。 The preheating furnace 1, the sintering furnace 2, and the cooling section 3 are connected in a tunnel-like manner, and gas introduction sections 4, 5 are provided between the preheating furnace 1 and the sintering furnace 2 and at appropriate locations in the cooling section 3, respectively.
A combustion section 8 is provided outside the furnace, in which a gas burner 7 is inserted to completely burn hydrocarbon gas and air.
A shift furnace 6 equipped with a catalyst tube 9 passing through the combustion section 8 is installed, and a gas outlet 9' of the combustion section 8 is connected to a cooler 1.
0 to the inlet side of the catalyst tube 9, and the outlet side of the catalyst tube is connected to the introduction section 5 of the cooling section 3 to supply endothermic atmospheric gas. The inlet 9' is connected to a gas inlet 4 between the preheating furnace 1 and the sintering furnace 2 through a cooler 10, and the gas inlet 4 is supplied with exothermic atmospheric gas. Furnace.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13276981U JPS5838747U (en) | 1981-09-07 | 1981-09-07 | sintering furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13276981U JPS5838747U (en) | 1981-09-07 | 1981-09-07 | sintering furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5838747U JPS5838747U (en) | 1983-03-14 |
| JPS6126327Y2 true JPS6126327Y2 (en) | 1986-08-07 |
Family
ID=29926282
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13276981U Granted JPS5838747U (en) | 1981-09-07 | 1981-09-07 | sintering furnace |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5838747U (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009215627A (en) * | 2008-03-12 | 2009-09-24 | Mitsubishi Materials Techno Corp | Dewaxing device and continuous sintering furnace |
-
1981
- 1981-09-07 JP JP13276981U patent/JPS5838747U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5838747U (en) | 1983-03-14 |
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