JPH0526533B2 - - Google Patents
Info
- Publication number
- JPH0526533B2 JPH0526533B2 JP60056580A JP5658085A JPH0526533B2 JP H0526533 B2 JPH0526533 B2 JP H0526533B2 JP 60056580 A JP60056580 A JP 60056580A JP 5658085 A JP5658085 A JP 5658085A JP H0526533 B2 JPH0526533 B2 JP H0526533B2
- Authority
- JP
- Japan
- Prior art keywords
- furnace body
- ceramic raw
- furnace
- raw material
- ceramic
- 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
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J6/00—Heat treatments such as Calcining; Fusing ; Pyrolysis
- B01J6/001—Calcining
Landscapes
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Vertical, Hearth, Or Arc Furnaces (AREA)
- Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は熱処理の過程で異常膨張するセラミツ
クス原料の仮焼合成を行う竪型セラミツクス仮焼
炉に関する。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a vertical ceramic calcination furnace for calcination synthesis of ceramic raw materials that expand abnormally during heat treatment.
（従来技術）
従来よりセラミツクス原料の仮焼合成、セラミ
ツクス成型体の焼成等には、トンネル型連続焼成
炉やバツチ式焼成炉あるいはロータリキルン等の
炉が使用されてきた。(Prior Art) Furnaces such as tunnel-type continuous firing furnaces, batch-type firing furnaces, and rotary kilns have conventionally been used for calcining synthesis of ceramic raw materials, firing of ceramic molded bodies, and the like.
トンネル型連続焼成炉は、トンネル状の炉体が
水平に配置されたもので、トンネル型連続焼成炉
でセラミツクス原料を仮焼する場合は、セラミツ
クス原料を箱体状の焼成匣に入れて台板上に積載
し、炉体内に送り込んで仮焼する。 A tunnel-type continuous firing furnace has a tunnel-shaped furnace body arranged horizontally.When calcining ceramic raw materials in a tunnel-type continuous firing furnace, the ceramic raw materials are placed in a box-shaped firing box and placed on a base plate. It is loaded on top and sent into the furnace to be calcined.
バツチ式焼成炉でセラミツクス原料を仮焼する
場合も、セラミツクス原料を焼成匣に入れて台板
上に積載し、いわゆるバツチ処理により仮焼を行
う。 When ceramic raw materials are calcined in a batch-type firing furnace, the ceramic raw materials are placed in a firing box and placed on a base plate, and calcined by so-called batch processing.
以上のトンネル型連続焼成炉やバツチ式焼成炉
では、いずれも焼成匣は台板等の焼成炉材を必要
とするうえ、これら焼成炉材が有している熱容量
のため熱効率も低く、セラミツクス成型体の単位
処理量に対する設備も大きくなるという問題を有
していた。 In both the tunnel-type continuous firing furnace and batch-type firing furnace, the firing box requires firing furnace materials such as a base plate, and the thermal efficiency is low due to the heat capacity of these firing furnace materials, and ceramic molding is required. However, there was a problem in that the equipment required for the unit processing amount of the body also became large.
さらに、ロータリキルンはセメント合成に代表
される設備であるが、設備コストも高く、また、
小形のものでは設備面積当りの処理量が小さい等
の問題があつた。 Furthermore, rotary kilns are a typical equipment for cement synthesis, but the equipment costs are high, and
Small-sized devices had problems such as a small throughput per facility area.
ところで、従来より、セメント合成の分野等で
は、シヤフトキルンと呼ばれる竪型の炉体を有す
る炉を使用し、竪型の炉体の内部に石灰石と石炭
とを交互に層状に詰め込み、炉体内部を加熱して
セメントを合成することが行われていた。 By the way, conventionally, in the field of cement synthesis, etc., a furnace with a vertical furnace body called a shaft kiln is used, and limestone and coal are packed in alternating layers inside the vertical furnace body, and the inside of the furnace body is heated. Cement was synthesized by heating.
このシヤフトキルンは、炉体が竪型のものであ
るため、設置面積を小さくすることができるばか
りでなく、炉体下方の熱は炉体上方に上昇し、そ
の途中でセメント原料を加熱するので熱効率も比
較的高いといつた利点を有していた。 This shaft kiln has a vertical furnace body, which not only allows for a smaller installation area, but also improves thermal efficiency because the heat below the furnace body rises above the furnace body and heats the cement raw material on the way. It also had the advantage of being relatively expensive.
そこで、近年、電子材料用セラミツクス原料の
仮焼合成に、シヤフトキルンを採用することが検
討されているが、電子材料用セラミツクスは仮焼
合成する際に、ある温度領域で材料が異常膨張す
る特異な現象が知られている。たとえば、第３図
において曲線h1，h2，h3，h4およびh5で夫々示す
ように、チタン酸バリウム（BaTiO3）の合成時
には約1100℃にて、チタン酸カルシウム
（CaTiO3）の合成時には約1200℃にて、チタン
酸鉛（PbTiO3）の合成時には約700℃にて、ジ
ルコン酸鉛（PbZrO3）の合成時には1000℃にて、
また、Znフエライト（ZnFe2O4）では900℃にて
夫々異常膨張を示し、線膨張が４パーセントない
し10パーセント、体積膨張率では14パーセントな
いし30パーセントにも達する。 Therefore, in recent years, the use of shaft kilns has been considered for the calcination synthesis of raw materials for ceramics for electronic materials. The phenomenon is known. For example, as shown by curves h 1 , h 2 , h 3 , h 4 and h 5 in FIG. 3, when barium titanate (BaTiO 3 ) is synthesized, calcium titanate (CaTiO 3 ) is At approximately 1200℃ for the synthesis of lead titanate (PbTiO 3 ), at approximately 700℃ for the synthesis of lead zirconate (PbZrO 3 ), and at 1000℃ for the synthesis of lead zirconate (PbZrO 3 ).
Furthermore, Zn ferrite (ZnFe 2 O 4 ) exhibits abnormal expansion at 900°C, with a linear expansion of 4% to 10% and a volumetric expansion rate of 14% to 30%.
従つて、シヤフトキルン内に上記のような電子
材料用セラミツクス原料を詰め込み、シヤフトキ
ルンの上部から下部に落下させながら上記材料を
仮焼合成する際、仮焼合成中に上記セラミツクス
原料が異常膨張し、シヤフトキルン内で上記セラ
ミツクス原料が詰つてしまい、仮焼合成が行えな
くなるという問題があつた。 Therefore, when a shaft kiln is filled with ceramic raw materials for electronic materials such as those described above, and the materials are calcined and synthesized while being dropped from the upper part of the shaft kiln to the lower part, the ceramic raw materials are abnormally expanded during the calcining synthesis, and the shaft kiln is damaged. There was a problem in that the ceramic raw materials were clogged inside the chamber, making it impossible to carry out calcining synthesis.
（発明の目的）
本発明は上記問題点を解消すべくなされたもの
であつて、セラミツクス原料が異常膨張しても炉
体内のセラミツクス原料が安定に落下し、炉体内
にセラミツクス原料が詰るのを防止するようにし
た竪型セラミツクス仮焼炉を提供することを目的
としている。(Objective of the Invention) The present invention has been made to solve the above-mentioned problems.Even if the ceramic raw material expands abnormally, the ceramic raw material in the furnace body falls stably and prevents the ceramic raw material from clogging the furnace body. It is an object of the present invention to provide a vertical ceramic calcining furnace that prevents the above.
（発明の構成）
このため、本発明は、予め造粒され、ある温度
領域で異常膨張する粒状のセラミツクス原料が炉
体の上方から下方に向かつて落下する過程で仮焼
される竪型セラミツクス仮焼炉であつて、耐火物
よりなり、上下方向に配置されてなる筒形状を有
する炉体と、この炉体内部に上下方向に間隔をお
いて配置されるとともに、下方に向かつて径が
徐々に小さくなり、上記セラミツクス原料の炉体
内での流れを絞る漏斗状の絞り部材と、各々が錐
体形状を有し、頂点部分が最下段の絞り部材から
上の絞り部材の下部開口に対向して配置され、炉
体の下方に向かつて落下するセラミツクス原料を
炉体の径方向に分散させる分散部材と、上記炉体
の外側に配置され、炉体内部のセラミツクス原料
を加熱する発熱体とを備え、上記各絞り部材の下
部開口の外周部および上記分散部材の下部にセラ
ミツクス原料の上記異常膨張を吸収する空間が形
成されていることを特徴としている。(Structure of the Invention) Therefore, the present invention provides a vertical ceramic material that is granulated in advance and is calcined in the process of falling from the upper part of the furnace body to the lower part of the furnace body. The furnace is made of a refractory material and has a cylindrical shape and is arranged in the vertical direction. a funnel-shaped throttle member that is made smaller in size and throttles the flow of the ceramic raw material in the furnace body; a dispersing member disposed at the bottom of the furnace body to disperse the falling ceramic raw material in the radial direction of the furnace body; and a heating element disposed outside the furnace body to heat the ceramic raw material inside the furnace body. The present invention is characterized in that a space for absorbing the abnormal expansion of the ceramic raw material is formed at the outer periphery of the lower opening of each of the aperture members and at the lower part of the dispersion member.
（発明の効果）
本発明によれば、セラミツクス原料が炉体内を
落下する過程で異常膨張により体積が増加する
と、この体積の増加はセラミツクス原料の異常膨
張を吸収する空間に吸収されるので、仮焼時にセ
ラミツクス原料が炉体内に詰るということがな
く。従つて、電子セラミツクスの原料の仮焼が可
能な竪型仮焼炉を得ることができる。この竪型仮
焼炉は炉体が上下方向に配置されているので、配
置面積も小さくすることができる。(Effects of the Invention) According to the present invention, when the volume of the ceramic raw material increases due to abnormal expansion in the process of falling inside the furnace body, this increase in volume is absorbed by the space that absorbs the abnormal expansion of the ceramic raw material. Ceramic raw materials do not get stuck inside the furnace during firing. Therefore, a vertical calcining furnace capable of calcining raw materials for electronic ceramics can be obtained. In this vertical calcining furnace, since the furnace body is arranged in the vertical direction, the arrangement area can also be reduced.
（実施例）
以下、添付図面を参照しつゝ本発明の実施例を
説明する。(Embodiments) Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
第１図に示すセラミツクス原料仮焼炉は、仮焼
するセラミツクス原料１を投入するためのポツパ
２の下部に円筒形の炉体３が上下方向に配置され
ている。上記炉体３はアルミナ（Al2O3）系の耐
火物もしくは炭化硅素（SiC）系の耐火物等によ
り構成された多孔質のものである。 The ceramic raw material calcination furnace shown in FIG. 1 has a cylindrical furnace body 3 arranged vertically below a popper 2 into which ceramic raw material 1 to be calcined is charged. The furnace body 3 is porous and made of an alumina (Al 2 O 3 )-based refractory, a silicon carbide (SiC)-based refractory, or the like.
上記炉体３の内部には、下方に向つて径が小さ
くなり、セラミツクス原料１が炉体３内での流れ
を絞る漏斗状の絞り部材４がほゞ等しい間隔をお
いて複数段、設けられている。上記炉体３の内部
にはまた、最下段の絞り部材４を除き、各絞り部
材４に対向して、セラミツクス原料１を炉体３の
径方向に分散させる円錐状の分散部材５が配置さ
れている。これら絞り部材４および分散部材５
は、炉体３と同じ材料ににより構成されている。 Inside the furnace body 3, a plurality of funnel-shaped restricting members 4 whose diameter decreases toward the bottom and which restricts the flow of the ceramic raw material 1 within the furnace body 3 are provided at approximately equal intervals. ing. Inside the furnace body 3, a conical dispersion member 5 for dispersing the ceramic raw material 1 in the radial direction of the furnace body 3 is arranged opposite to each throttle member 4 except for the lowest stage throttle member 4. ing. These aperture member 4 and dispersion member 5
is made of the same material as the furnace body 3.
上記炉体３の外部には炭化硅素系の発熱体６，
６，…が上下方向に所定の間隔をおいて配置され
ている。 Outside the furnace body 3, a silicon carbide heating element 6,
6,... are arranged at predetermined intervals in the vertical direction.
以上に構成を説明した竪型仮焼炉では、炉体３
内を容易に落下するように、セラミツクス原料１
は予め造粒機（図示せず。）により造粒されてお
り、このように造粒されたセラミツクス原料１が
ホツパ２に投入されると、セラミツクス原料１は
各絞り部材４に絞り込まれて下段の絞り部材４上
に落下するが、セラミツクス原料１はその安息角
を越えて各絞り部材４や分散部材５の下側に廻り
込むことはない。従つて、各絞り部材４によりセ
ラミツクス原料１が絞り込まれて下段の絞り部材
４に落下する位置の外周に空間７が形成される。
また、分散部材５の下部にも空間８が形成され
る。 In the vertical calcining furnace whose configuration has been explained above, the furnace body 3
Ceramic raw material 1 so that it can easily fall inside
is granulated in advance by a granulator (not shown), and when the ceramic raw material 1 granulated in this way is put into the hopper 2, the ceramic raw material 1 is squeezed by each squeezing member 4 and sent to the lower stage. However, the ceramic raw material 1 does not exceed its angle of repose and go under each of the throttle members 4 and the dispersion member 5. Therefore, a space 7 is formed around the outer periphery of the position where the ceramic raw material 1 is squeezed by each throttle member 4 and falls to the lower stage throttle member 4.
Further, a space 8 is also formed under the dispersion member 5 .
炉体３内を落下する過程で、発熱体６，６，…
により加熱されたセラミツクス原料１の異常膨張
による体積増加は、上記空間７および８により吸
収させることができる。従つて、セラミツクス原
料１が炉体３内で異常膨張しても、炉体３内にセ
ラミツクス原料１が詰まることはない。すなわ
ち、竪型の炉によるセラミツクス原料１の仮焼が
可能となる。 In the process of falling inside the furnace body 3, the heating elements 6, 6,...
The increase in volume due to abnormal expansion of the heated ceramic raw material 1 can be absorbed by the spaces 7 and 8. Therefore, even if the ceramic raw material 1 expands abnormally within the furnace body 3, the ceramic raw material 1 will not become clogged within the furnace body 3. That is, the ceramic raw material 1 can be calcined in a vertical furnace.
上記実施例において、炉体３の形状は、円筒の
他、三角形、四角形もしくは多角形の筒形状とす
ることができる。 In the embodiments described above, the shape of the furnace body 3 may be a cylinder, or may be triangular, quadrangular, or polygonal.
本発明の実施例によれば、セラミツクス原料１
の間の空隙を通る熱風は、温度が高くなると比重
が低下して上昇するに対し、セラミツクス原料１
は上方から落下するため、高温の上昇空気は全て
セラミツクス原料の予熱に使用され、熱効率の高
い仮焼炉とすることができる。ちなみに、原料１
Kg当りの電力使用量を算出すると、第１図の竪型
仮焼炉では、トンネル型連続焼成炉によりチタン
酸ジルコン酸鉛を合成するのに必要とした電力量
0.18KWh／Kgの１／9.6になり、チタン酸バリウ
ムを合成するのに必要とした電力量0.43KWh／
Kgの１／9.7となり、大幅な省エネルギー効果が
あつた。 According to an embodiment of the present invention, ceramic raw material 1
As the temperature increases, the specific gravity of hot air passing through the gaps between ceramics decreases and rises;
Since the air falls from above, all of the high temperature rising air is used to preheat the ceramic raw material, making it possible to create a calcining furnace with high thermal efficiency. By the way, raw material 1
Calculating the amount of electricity used per kg, the amount of electricity required to synthesize lead zirconate titanate in the vertical calcining furnace shown in Figure 1 and in the tunnel type continuous calcining furnace.
This is 1/9.6 of 0.18KWh/Kg, and the amount of electricity required to synthesize barium titanate is 0.43KWh/
It was 1/9.7 of Kg, resulting in a significant energy saving effect.
第１図は本発明に係る竪型仮焼炉の実施例の縦
断面図、第２図はセラミツクス原料の仮焼時の異
常膨張の説明図である。
１…セラミツクス原料、３…炉体、４…絞り部
材、５…分散部材、７，８…空間。
FIG. 1 is a longitudinal sectional view of an embodiment of a vertical calcining furnace according to the present invention, and FIG. 2 is an explanatory diagram of abnormal expansion during calcining of ceramic raw materials. DESCRIPTION OF SYMBOLS 1... Ceramics raw material, 3... Furnace body, 4... Squeezing member, 5... Dispersion member, 7, 8... Space.
Claims (1)
粒状のセラミツクス原料が炉体の上方から下方に
向かつて落下する過程で仮焼される竪型セラミツ
クス仮焼炉であつて、 耐火物よりなり、上下方向に配置されてなる筒
形状を有する炉体と、この炉体内部に上下方向に
間隔をおいて配置されるとともに、下方に向かつ
て径が徐々に小さくなり、上記セラミツクス原料
の炉体内での流れを絞る漏斗状の絞り部材と、
各々が錐体形状を有し、頂点部分が最下段の絞り
部材から上の絞り部材の下部開口に対向して配置
され、炉体の下方に向かつて落下するセラミツク
ス原料を炉体の径方向に分散させる分散部材と、
上記炉体の外側に配置され、炉体内部のセラミツ
クス原料を加熱する発熱体とを備え、上記各絞り
部材の下部開口の外周部および上記分散部材の下
部にセラミツクス原料の上記異常膨張を吸収する
空間が形成されていることを特徴とする竪型セラ
ミツクス仮焼炉。[Scope of Claims] 1. A vertical ceramic calcination furnace in which pre-granulated ceramic raw materials that expand abnormally in a certain temperature range are calcined in the process of falling from above to below the furnace body. , a furnace body made of refractory material and having a cylindrical shape and arranged in the vertical direction; A funnel-shaped restricting member that restricts the flow of ceramic raw materials in the furnace body;
Each has a conical shape, and the apex part is arranged from the lowest aperture member to the lower opening of the upper aperture member, and the ceramic raw material falling toward the bottom of the furnace body is directed in the radial direction of the furnace body. a dispersion member to be dispersed;
A heating element is provided outside the furnace body to heat the ceramic raw material inside the furnace body, and the abnormal expansion of the ceramic raw material is absorbed in the outer periphery of the lower opening of each throttle member and the lower part of the dispersion member. A vertical ceramic calcining furnace characterized by a space formed therein.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5658085A JPS61216728A (en) | 1985-03-20 | 1985-03-20 | Vertical ceramics calcinator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5658085A JPS61216728A (en) | 1985-03-20 | 1985-03-20 | Vertical ceramics calcinator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61216728A JPS61216728A (en) | 1986-09-26 |
| JPH0526533B2 true JPH0526533B2 (en) | 1993-04-16 |
Family
ID=13031099
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5658085A Granted JPS61216728A (en) | 1985-03-20 | 1985-03-20 | Vertical ceramics calcinator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61216728A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE69321041D1 (en) * | 1992-06-23 | 1998-10-22 | Tdk Corp | Calcination furnace |
| KR20070110935A (en) * | 2005-06-16 | 2007-11-20 | 도카이 코네츠 고교 가부시키가이샤 | Vertical firing furnace and firing method using the same |
| FR2910777B1 (en) * | 2006-12-21 | 2013-07-19 | Revtech | PROCESS FOR THERMALLY TREATING PULVERULENT MATERIALS |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2539266C3 (en) * | 1975-09-04 | 1980-05-22 | Bergwerksverband Gmbh, 4300 Essen | Reactor for the regeneration of loaded adsorbent |
| DE3125410C2 (en) * | 1981-06-27 | 1983-04-28 | Beckenbach, Ulrich, Dipl.-Ing., 4005 Meerbusch | Device for loading a shaft furnace |
| JPS606692B2 (en) * | 1982-07-14 | 1985-02-20 | 日本フア−ネス工業株式会社 | Firing method and furnace |
-
1985
- 1985-03-20 JP JP5658085A patent/JPS61216728A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61216728A (en) | 1986-09-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA1120713A (en) | Combustion control system for burning installation with calcining burner | |
| US2627399A (en) | Cement manufacture | |
| US3307840A (en) | Continuous calcination of gypsum | |
| CN88102156A (en) | Drying furnace for granular materials | |
| US2069164A (en) | Rotary kiln | |
| JPH0526533B2 (en) | ||
| US4837423A (en) | Low temperature kiln | |
| US3175302A (en) | Gravity-type heat exchanger for treating particulate solid material | |
| US5623883A (en) | Kiln for calcination of a powder | |
| US4494930A (en) | Shaft furnace for heat treatment of finely dispersed materials | |
| JPS61191876A (en) | Baking furnace | |
| US1929953A (en) | Manufacture of hydraulic cement | |
| JPS61195275A (en) | Baking furnace | |
| JPH0359357B2 (en) | ||
| JPS61191875A (en) | Baking furnace | |
| SU1712754A1 (en) | Shaft furnace for calcination of granulated materials | |
| JPH05332680A (en) | Continuous type heat treatment furnace | |
| SU792051A1 (en) | Rotary furnace ceramic heat exchanger | |
| SU648808A1 (en) | Ring shaft furnace | |
| JPH0268484A (en) | Sintering facility | |
| SU1434224A1 (en) | Continuously operating electric calcinator | |
| SU1589010A1 (en) | Apparatus for thermal treatment of granulated and loose material | |
| CA1145544A (en) | Shaft furnace for thermal processing of finely dispersed materials | |
| SU1359613A1 (en) | Mine counter=flow heater of lump material | |
| SU1004731A1 (en) | Apparatus for cooling loose materials |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |