JPH0421114B2 - - Google Patents
Info
- Publication number
- JPH0421114B2 JPH0421114B2 JP1156784A JP1156784A JPH0421114B2 JP H0421114 B2 JPH0421114 B2 JP H0421114B2 JP 1156784 A JP1156784 A JP 1156784A JP 1156784 A JP1156784 A JP 1156784A JP H0421114 B2 JPH0421114 B2 JP H0421114B2
- Authority
- JP
- Japan
- Prior art keywords
- rotary hearth
- heater
- heat
- hearth
- electric furnace
- 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
- 239000000463 material Substances 0.000 description 13
- 238000002791 soaking Methods 0.000 description 13
- 239000000919 ceramic Substances 0.000 description 8
- 238000010304 firing Methods 0.000 description 7
- 238000001354 calcination Methods 0.000 description 4
- 230000017525 heat dissipation Effects 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 3
- 239000011810 insulating material Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 229910000953 kanthal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910001120 nichrome Inorganic materials 0.000 description 2
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 2
- 229910010271 silicon carbide Inorganic materials 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 210000002268 wool Anatomy 0.000 description 1
Landscapes
- Muffle Furnaces And Rotary Kilns (AREA)
Description
【発明の詳細な説明】
本発明は、回転炉床電気炉、特にセラミツク等
の仮焼や焼成に使用する回転炉床電気炉に関す
る。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rotary hearth electric furnace, particularly to a rotary hearth electric furnace used for calcination and firing of ceramics and the like.
従来、セラミツク等の仮焼や焼成に使用されて
いる回転炉床電気炉は、円筒形の回転炉床をその
軸心まわりに低速回転させるとともに、該回転炉
床を包囲する炉本体内にヒータが設けられる。こ
のヒータは回転炉床と同心状に配設したニクロム
線やカンタル線などの金属線ヒータや、回転炉床
の周囲に井桁状に配設された多数の炭化ケイ素質
系棒状発熱体などで構成される。すなわち、従来
の回転炉床電気炉では、回転炉床内の被処理物を
回転炉床の外側から加熱するようになつている。
ところが、これら従来の回転炉床電気炉では、回
転炉床内の被処理物に供給される熱量よりも炉本
体から外部へ放散される熱量の方が多い。その結
果、炉床温度を被処理物の仮焼または焼成に必要
な約1000〜1400℃に保つために、ヒータを多数設
けて供給熱量を多くしなければならず、消費電力
が多くなり、ヒータ制御回路も複雑で高価にある
欠点がある。しかも、このような欠点がセラミツ
ク製品のコストに反映され、その価格上昇の一因
となつている。 Conventionally, a rotary hearth electric furnace used for calcination and firing of ceramics, etc. rotates a cylindrical rotary hearth at low speed around its axis, and a heater is installed in the furnace body surrounding the rotary hearth. will be provided. This heater consists of a metal wire heater such as Nichrome wire or Kanthal wire arranged concentrically with the rotary hearth, and a large number of silicon carbide rod-shaped heating elements arranged in a cross-shaped pattern around the rotary hearth. be done. That is, in the conventional rotary hearth electric furnace, the workpiece inside the rotary hearth is heated from the outside of the rotary hearth.
However, in these conventional rotary hearth electric furnaces, the amount of heat dissipated from the furnace body to the outside is greater than the amount of heat supplied to the workpiece in the rotary hearth. As a result, in order to maintain the hearth temperature at approximately 1,000 to 1,400 degrees Celsius, which is necessary for calcination or firing of the processed material, it is necessary to provide a large number of heaters to supply a large amount of heat, resulting in increased power consumption and The control circuit also has the disadvantage of being complex and expensive. Moreover, these drawbacks are reflected in the cost of ceramic products, contributing to their price increases.
本発明は、浄述に鑑み、回転炉床電気炉の消費
電力を低減し、また、その制御装置を簡単にかつ
安価にし、もつて、セラミツク製品のコストダウ
ンを図ることを目的とする。 In view of the above, it is an object of the present invention to reduce the power consumption of a rotary hearth electric furnace, to make its control device simple and inexpensive, and to thereby reduce the cost of ceramic products.
本発明は、このような目的のために、円筒形の
回転炉床と該回転炉床を包囲する断熱性の炉本体
とヒータとを有し、前記ヒータを回転炉床の軸心
に沿う棒状に形成するとともに、回転炉床の軸心
方向に変位可能に設けたものである。 For this purpose, the present invention includes a cylindrical rotary hearth, an adiabatic furnace body surrounding the rotary hearth, and a heater, and the heater is arranged in a rod-like shape along the axis of the rotary hearth. It is formed so that it can be displaced in the axial direction of the rotary hearth.
このように構成することにより、ヒータは直接
に回転炉床内に熱を放射し、回転炉床内の対流熱
とヒータからの放射熱とにより被処理物が加熱さ
れ、ヒータから被処理物への伝熱損失が少なくな
る。また、回転炉床から外部への熱の放散は断熱
性の炉本体によつて防止され、回転炉床電気炉全
体からの放熱による熱損失も少なくなる。したが
つて、消費電力を低減でき、また、ヒータの数を
少なくして、その制御回路を単純で安価にでき
る。 With this configuration, the heater radiates heat directly into the rotating hearth, and the object to be processed is heated by the convection heat within the rotating hearth and the radiant heat from the heater, and the heat is transferred from the heater to the object. heat transfer loss is reduced. Further, heat dissipation from the rotary hearth to the outside is prevented by the heat insulating furnace body, and heat loss due to heat dissipation from the entire rotary hearth electric furnace is reduced. Therefore, power consumption can be reduced, the number of heaters can be reduced, and the control circuit thereof can be made simple and inexpensive.
本発明を実施するうえで、ヒータの均熱部分の
長さ、すなわち、均熱域がヒータ長さの1/2〜1/3
に限定されるので、長い均熱域を要する製品の仮
焼や焼成をするには炉全体を大型化しなければな
らず、不向きなことが問題になる。このような問
題を解消するために、本発明の実施例では、ヒー
タを回転炉床の軸心方向に変位可能に設けられ
る。これにより、ヒータの均熱域を所要の範囲に
わたつて変位させて、回転炉床内にヒータのの均
熱域よりも長い均熱帯を実現でき、均熱長の長い
被処理物の仮焼や焼成処理を比較的短かいヒータ
および回転炉床を用いて行えるようになる。 In carrying out the present invention, the length of the soaking part of the heater, that is, the soaking area is 1/2 to 1/3 of the length of the heater.
Therefore, in order to perform calcination or firing of products that require a long soaking period, the entire furnace must be enlarged, and the problem is that it is unsuitable. In order to solve this problem, in the embodiment of the present invention, the heater is provided so as to be displaceable in the axial direction of the rotary hearth. As a result, the soaking area of the heater can be displaced over the required range, and a soaking area longer than the soaking area of the heater can be realized in the rotary hearth. The firing process can be performed using a relatively short heater and rotating hearth.
以下、本発明を図面に示す実施例に基づき具体
的に説明する。 Hereinafter, the present invention will be specifically described based on embodiments shown in the drawings.
図は本発明の一実施例に係る回転炉床電気炉の
縦断図である。図において、１は回転炉床、２，
２は該回転炉床１を支持するローラ、３は該回転
炉床１の周面の大部分を包囲する炉本体、４は炉
本体３を支持する架台、５は前記回転炉床１に供
給される被処理物を収納するホツパ、６は定量供
給装置、７は被処理物回収用シユート、８は被処
理物回収用容器をそれぞれ示す。前記回転炉床１
はたとえばアルミナでつくられ、その一端（図
上、右端）に被処理物供給口Ａを、他端（図上、
左端）に被処理物排出口Ｂをそれぞれ開口させた
円筒形に形成される。この回転炉床１は被処理物
供給口Ａ側が被処理物排出口Ｂ側よりも若干高く
なるように傾斜させられる。また、この回転炉床
１は図示しない回転駆動装置によりたとえば毎分
0.5〜５回転の低速度で回転させられる。自動定
量供給装置６は、たとえば電磁フイーダなどで構
成され、回転炉床１の被処理物供給口Ａに近接し
て設けられ、ホツパ５内の被処理物を自動的に一
定量ずつ回転炉床１内に供給するように構成され
る。シユート７は回転炉床１の被処理物排出口Ｂ
を覆い、処理が済んで被処理物排出口Ｂから出て
くる被処理物をその下方に配置された前記容器８
に案内するように構成される。 The figure is a longitudinal sectional view of a rotary hearth electric furnace according to an embodiment of the present invention. In the figure, 1 is a rotating hearth, 2,
2 is a roller that supports the rotary hearth 1; 3 is a furnace body that surrounds most of the circumferential surface of the rotary hearth 1; 4 is a pedestal that supports the furnace body 3; and 5 is a supply supply to the rotary hearth 1. 6 is a quantitative supply device, 7 is a chute for recovering the processed material, and 8 is a container for recovering the processed material. The rotary hearth 1
is made of alumina, for example, and has a workpiece supply port A at one end (right end in the diagram) and the other end (right end in the diagram).
It is formed into a cylindrical shape with a processing material discharge port B opened at the left end). This rotary hearth 1 is inclined so that the side of the supply port A of the material to be processed is slightly higher than the side of the outlet B of the material to be processed. Moreover, this rotary hearth 1 is rotated, for example, every minute by a rotary drive device (not shown).
It can be rotated at a low speed of 0.5 to 5 rotations. The automatic fixed quantity feeding device 6 is composed of, for example, an electromagnetic feeder, and is provided close to the feed port A of the material to be processed in the rotary hearth 1, and automatically feeds the material to be processed in the hopper 5 in fixed amounts to the rotary hearth. 1. The chute 7 is the discharge port B of the material to be treated in the rotary hearth 1.
The container 8 is placed under the container 8, which covers the processed material and discharges the processed material from the processed material discharge port B.
configured to guide you.
前記炉本体３は断熱レンガ、セラミツクウール
などの断熱材料で形成される。また、前記回転炉
床１の軸心に沿つて棒状のヒータ９が配設され
る。このヒータ９はその両端に連結された端子１
０，１０を介して図示しない電源に接続される。
さらに、このヒータ９は図示しない往復駆動装置
によりその軸心方向に所定のストロークにわたり
連続往復変位させられるように構成される。この
往復駆動装置は回転炉床の外部に設けられる。前
記ヒータ９は、焼成温度が1000℃前後の場合には
ニクロムやカンタル金属線などが、焼成温度が
1000℃を超える場合には炭化ケイ素などが発熱材
料として使用される。もちろん、回転炉床１の形
状、大きさ、ヒータ９の断面形状、径、長さなど
は必要に応じて適宜設計変更される。 The furnace body 3 is made of a heat insulating material such as heat insulating brick or ceramic wool. Further, a rod-shaped heater 9 is arranged along the axis of the rotary hearth 1 . This heater 9 has terminals 1 connected to both ends thereof.
It is connected to a power source (not shown) via pins 0 and 10.
Furthermore, this heater 9 is configured to be continuously reciprocated in its axial direction over a predetermined stroke by a reciprocating drive device (not shown). This reciprocating drive is provided outside the rotary hearth. The heater 9 is made of nichrome or Kanthal metal wire when the firing temperature is around 1000°C.
If the temperature exceeds 1000℃, silicon carbide or the like is used as a heat generating material. Of course, the shape and size of the rotary hearth 1, the cross-sectional shape, diameter, length, etc. of the heater 9 may be changed as necessary.
このように構成された回転炉床電気炉によれ
ば、ホツパ５に入れられた被処理物、たとえば、
セラミツク成形品は、自動定量供給装置６により
所定量ずつ回転炉床１内に供給される。そして、
回転炉床１を回転させることにより、被処理物は
回転炉床１の被処理物供給口Ａ側から被処理物排
出口Ｂに向つて移動させられるとともに、ヒータ
９により加熱され、仮焼、焼成など所要の処理を
受ける。この加熱は、ヒータ９からの放射熱だけ
でなく、回転炉床１内の対流によつても行なわれ
る。また、ヒータ９がその軸心方向に連続往復変
位させられているので、回転炉床１内の均熱帯の
長さは、ヒータ９の均熱長とその変位ストローク
との和に等しい長さになる。したがつて、ヒータ
９の変位ストロークを適宜変更するだけでヒータ
９の長さを変えることなく、回転炉床１内の均熱
帯の長さをヒータ９の均熱長よりも長い所望の長
さに変更することができる。さらに、炉本体３が
断熱材料で作られ、回転炉床１の外周面から外部
への熱の放散が防止されているので、熱損失が少
なくなり、消費電力をたとえば従来の回転炉床電
気炉に比べて約1/5に少なくできるうえ、ヒータ
９の数をたとえば本例のように１本に減らすこと
ができる。この結果、ヒータの制御回路を単純
で、たとえば従来の回転炉床電気炉に比べて約1/
３の安価なものにすることができた。また、これ
らの相乗的な効果としてセラミツク製品の生産コ
ストを10〜20％低減できた。 According to the rotary hearth electric furnace configured in this way, the workpieces placed in the hopper 5, for example,
The ceramic molded product is fed into the rotary hearth 1 in predetermined amounts by an automatic quantitative feeding device 6. and,
By rotating the rotary hearth 1, the workpiece is moved from the workpiece supply port A side of the rotary hearth 1 toward the workpiece discharge port B, is heated by the heater 9, and is calcined and It undergoes the necessary processing such as firing. This heating is performed not only by radiant heat from the heater 9 but also by convection within the rotary hearth 1. Furthermore, since the heater 9 is continuously displaced back and forth in its axial direction, the length of the soaking zone in the rotary hearth 1 is equal to the sum of the soaking length of the heater 9 and its displacement stroke. Become. Therefore, the length of the soaking zone in the rotary hearth 1 can be adjusted to a desired length that is longer than the soaking length of the heater 9 by simply changing the displacement stroke of the heater 9 as appropriate, without changing the length of the heater 9. can be changed to . Furthermore, since the furnace body 3 is made of a heat insulating material and heat dissipation from the outer peripheral surface of the rotary hearth 1 to the outside is prevented, heat loss is reduced and power consumption is reduced compared to, for example, a conventional rotary hearth electric furnace. In addition, the number of heaters 9 can be reduced to one as in this example. As a result, the heater control circuit is simple, and is about 1/2 that of a conventional rotary hearth electric furnace.
I was able to make it a cheaper version. In addition, as a synergistic effect, the production cost of ceramic products could be reduced by 10 to 20%.
なお、ヒータ９の変位ストロークがヒータ９の
長さと回転炉床１の長さとの差よりも大きくなる
場合や、ヒータ９がもともと回転炉床１よりも短
かい場合、ヒータ９の一端または両端に図示しな
い補長軸を連結してもよい。また、この補長軸を
導体で形成し、端子１０を補長軸の外側端部に連
結するようにしてもよい。 In addition, if the displacement stroke of the heater 9 becomes larger than the difference between the length of the heater 9 and the length of the rotary hearth 1, or if the heater 9 is originally shorter than the rotary hearth 1, one or both ends of the heater 9 A complementary axis (not shown) may be connected. Alternatively, the supplementary shaft may be formed of a conductor, and the terminal 10 may be connected to the outer end of the supplementary shaft.
以上説明したように、本発明は、回転炉床の軸
心に沿つて棒状のヒータを設け、ヒータが直接に
回転炉床内に熱を放射し、回転炉床内の対流熱と
ヒータからの放射熱とにより被処理物が加熱され
るように構成されているので、ヒータから被処理
物への伝熱損失が少なくなる。また、該回転炉床
を包囲する炉本体を断熱材料で形成して、回転炉
床から外部への熱の放散が断熱性の炉本体によつ
て防止されるように構成してあるので、回転炉床
電気炉全体からの放熱による熱損失も少なくな
る。したがつて、消費電力を低減でき、また、ヒ
ータの数を少なくして、その制御回路を単純で安
価にでき、もつて、セラミツク製品のコストダウ
ンを計れる。 As explained above, the present invention provides a rod-shaped heater along the axis of the rotary hearth, and the heater radiates heat directly into the rotary hearth. Since the object to be processed is heated by the radiant heat, heat transfer loss from the heater to the object to be processed is reduced. In addition, the furnace body surrounding the rotary hearth is made of a heat insulating material so that heat dissipation from the rotary hearth to the outside is prevented by the heat insulating furnace body. Heat loss due to heat radiation from the entire hearth electric furnace is also reduced. Therefore, power consumption can be reduced, the number of heaters can be reduced, and the control circuit thereof can be made simple and inexpensive, thereby reducing the cost of ceramic products.
特に、ヒークをその軸心方向に往復変位できる
ようにしているので、回転炉床内の均熱帯をヒー
タの均熱長に比べて長くでき、長い均熱域を要す
る製品の仮焼や焼成を比較的小型のヒータおよび
回転炉床で行なえ、回転炉床電気炉全体を比較的
小型にできる等の効果が得られる。 In particular, since the heat can be reciprocated in the axial direction, the soaking zone in the rotary hearth can be longer than the soaking length of the heater, making it easier to calcinate and bake products that require a long soaking zone. It can be carried out using a relatively small heater and a rotary hearth, and the effect that the entire rotary hearth electric furnace can be made relatively small can be obtained.
図は本発明の一実施例の縦断面図である。
１……回転炉床、３……炉本体、９……ヒー
タ。
The figure is a longitudinal sectional view of one embodiment of the present invention. 1... Rotating hearth, 3... Furnace body, 9... Heater.
Claims (1)
熱性の炉本体と、ヒータとを有し、前記ヒータを
回転炉床の軸心に沿う棒状に形成するとともに、
回転炉床の軸心方向に変位可能に設けたたことを
特徴とする回転炉床電気炉。1. It has a cylindrical rotary hearth, an adiabatic furnace body surrounding the rotary hearth, and a heater, and the heater is formed into a rod shape along the axis of the rotary hearth,
A rotary hearth electric furnace characterized by being displaceable in the axial direction of the rotary hearth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1156784A JPS60155887A (en) | 1984-01-24 | 1984-01-24 | Rotary hearth electric furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1156784A JPS60155887A (en) | 1984-01-24 | 1984-01-24 | Rotary hearth electric furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60155887A JPS60155887A (en) | 1985-08-15 |
| JPH0421114B2 true JPH0421114B2 (en) | 1992-04-08 |
Family
ID=11781506
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1156784A Granted JPS60155887A (en) | 1984-01-24 | 1984-01-24 | Rotary hearth electric furnace |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60155887A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006225506A (en) * | 2005-02-17 | 2006-08-31 | Ishikawa Yasuo | Liquefaction apparatus |
| CA2777060A1 (en) * | 2009-10-15 | 2011-04-21 | Pyromex Holding Ag | High-temperature furnace and method for converting organic materials to synthesis gas |
-
1984
- 1984-01-24 JP JP1156784A patent/JPS60155887A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60155887A (en) | 1985-08-15 |
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