JPH0340475B2 - - Google Patents
Info
- Publication number
- JPH0340475B2 JPH0340475B2 JP56143344A JP14334481A JPH0340475B2 JP H0340475 B2 JPH0340475 B2 JP H0340475B2 JP 56143344 A JP56143344 A JP 56143344A JP 14334481 A JP14334481 A JP 14334481A JP H0340475 B2 JPH0340475 B2 JP H0340475B2
- Authority
- JP
- Japan
- Prior art keywords
- crucible
- air layer
- induction
- induction heating
- heating coil
- 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
- 230000006698 induction Effects 0.000 claims description 42
- 238000010438 heat treatment Methods 0.000 claims description 21
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 12
- 239000011819 refractory material Substances 0.000 claims description 6
- 239000000377 silicon dioxide Substances 0.000 claims description 6
- 239000002184 metal Substances 0.000 description 14
- 229910052751 metal Inorganic materials 0.000 description 14
- 239000011701 zinc Substances 0.000 description 8
- 230000002093 peripheral effect Effects 0.000 description 4
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 3
- 238000009835 boiling Methods 0.000 description 3
- 229910052725 zinc Inorganic materials 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010292 electrical insulation Methods 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 238000005273 aeration Methods 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
- 239000011449 brick Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052863 mullite Inorganic materials 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
- 238000005245 sintering Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Landscapes
- General Induction Heating (AREA)
Description
【発明の詳細な説明】 この発明は、誘導炉の改良に関する。[Detailed description of the invention] This invention relates to improvements in induction furnaces.
従来、誘導炉として、たとえば、ムライト、ア
ルミナ、炭化硅素等の混合物にて成る最大粒形３
乃至5m／ｍ程の不定形の耐火材を用いて、スタ
ンプ及び焼結処理を行なつて、溶解炉本体の炉壁
を形成し、該炉壁の外周に、水冷パイプ等が併設
された誘導加熱コイルを巻装して構成したものが
公知である。 Conventionally, as an induction furnace, for example, the maximum grain size 3 made of a mixture of mullite, alumina, silicon carbide, etc.
A furnace wall of the melting furnace body is formed by stamping and sintering an irregularly shaped refractory material of about 5 m/m to 5 m/m, and an induction furnace with water cooling pipes etc. attached to the outer periphery of the furnace wall. A device constructed by winding a heating coil is known.
しかしながら、上記従来の誘導炉においては、
溶解対象の金属として、たとえば、沸点約906℃
程の低沸点の亜鉛Znを、約920℃程に溶解した場
合、該Znの蒸気が炉壁に浸透して、該炉壁に亀
裂を生じさせ、該蒸気が誘導加熱コイルまで達し
てそのコイルの電気絶縁性を劣化させたり、ある
いは、該コイルを損焼したり、また、誘導加熱さ
れた金属の熱が、該金属蒸気の浸透した炉壁を通
して、冷却パイプ側に漏れて、誘導加熱に、可成
り無駄な電力を消費するという不具合があつた。 However, in the above conventional induction furnace,
For example, the boiling point of the metal to be melted is approximately 906℃.
When zinc Zn, which has a boiling point as low as In addition, the heat of the induction heated metal may leak into the cooling pipe side through the furnace wall penetrated by the metal vapor, causing induction heating. However, there was a problem that a considerable amount of power was wasted.
この発明は、上記種々の問題点を解消するため
になされたもので、不定形耐火材による炉壁の代
りに天然シリカ製の定形るつぼを用い、該壁の外
周面に、該外周面を包囲する空気層を設けるとと
もに、該空気層の外周に、耐火材製の断熱壁を介
して、誘導加熱コイルを巻装して、溶融金属蒸気
の炉壁への浸透率を低いものにするとともに、空
気層により、金属蒸気の誘導加熱コイルへの付着
を防止し、かつ、該コイルの損焼を防止し、るつ
ぼ内に生起した誘導熱が誘導加熱コイル側に逸散
するのを防止して熱効率の良好なる誘導炉を提供
することを目的とするものである。 This invention was made to solve the various problems mentioned above, and uses a shaped crucible made of natural silica instead of the furnace wall made of amorphous refractory material, and surrounds the outer circumferential surface of the wall with a shaped crucible made of natural silica. An air layer is provided, and an induction heating coil is wound around the outer periphery of the air layer via a heat insulating wall made of a refractory material to reduce the penetration rate of molten metal vapor into the furnace wall. The air layer prevents metal vapor from adhering to the induction heating coil, prevents the coil from burning out, and prevents the induction heat generated in the crucible from dissipating to the induction heating coil, improving thermal efficiency. The purpose of this invention is to provide an induction furnace with good quality.
つぎに、この発明の一実施例を、添付図面とと
もに説明する。 Next, one embodiment of the present invention will be described with reference to the accompanying drawings.
第１図においては、１は、たとえば、亜鉛Zn
溶解用のるつぼで、このるつぼ１は、天然シリカ
SiO2を用いて、横断面形状が円形に、かつ、縦
断面形状が略Ｕ字形に形成され、公知の方法で適
宜に成形焼結処理したものである。 In FIG. 1, 1 is, for example, zinc Zn
This crucible is for melting, and this crucible 1 is made of natural silica.
It is formed using SiO 2 to have a circular cross-sectional shape and a substantially U-shaped vertical cross-sectional shape, and is suitably shaped and sintered using a known method.
上記るつぼ１は、耐火レンガ等を用いた基台２
上に載置され、該るつぼ１の外周に、該外周面１
ａから適宜間隔をもつて、該外周面１ａを包囲す
る耐火材製の断熱壁３が設けられている。このよ
うにして、るつぼ１の外周面１ａと断熱壁３の内
周面３ｂとの間に、空気層４が形成されている。
この空気層４には、適宜位置、たとえば、るつぼ
１の底部側の位置に、当該誘導炉の外部空間に通
じる２つの開口４ｃ，４ｃが設けられている。 The crucible 1 has a base 2 made of fireproof bricks, etc.
placed on the crucible 1, and the outer peripheral surface 1 is placed on the outer periphery of the crucible 1.
A heat insulating wall 3 made of a refractory material and surrounding the outer circumferential surface 1a is provided at an appropriate interval from a. In this way, an air layer 4 is formed between the outer peripheral surface 1a of the crucible 1 and the inner peripheral surface 3b of the heat insulating wall 3.
This air layer 4 is provided with two openings 4c, 4c communicating with the external space of the induction furnace at appropriate positions, for example, at positions on the bottom side of the crucible 1.
そして、上記断熱壁３の外周には、誘導加熱コ
イル５，５が巻装され、これ等の誘導加熱コイル
５を包囲するように、継鉄６が設けられている。
さらに、この継鉄６は、図示しないボルト・ナツ
ト等で、枠体７に固定されている。 Induction heating coils 5, 5 are wound around the outer periphery of the heat insulating wall 3, and a yoke 6 is provided so as to surround these induction heating coils 5.
Furthermore, this yoke 6 is fixed to a frame 7 with bolts and nuts (not shown).
上記構成の誘導炉においては、溶解しようとす
る金属が、たとえば、低沸点約906℃の亜鉛Znで
あつて、該Znを約920℃程に溶融した場合であて
も、るつぼ１は天然シリカ製で誘導炉に設置する
前に形枠を用いて成形焼結処理したものであり、
従来形式の耐火材をスタンプして形成したものと
比べ、るつぼ１の気孔率を約1/2に低減し、かつ、
その通気率を約1/30程に低減して、当該るつぼ１
へのZn蒸気の浸透を、大巾に抑制することがで
きる。したがつて、それだけ、るつぼ１内の金属
に生起された誘導熱がるつぼ１を通して伝導され
る量を、有効に抑制することができる。 In the induction furnace configured as described above, even if the metal to be melted is, for example, zinc Zn with a low boiling point of about 906°C and the Zn is melted at about 920°C, the crucible 1 is made of natural silica. It is shaped and sintered using a form frame before being installed in an induction furnace.
The porosity of the crucible 1 has been reduced to approximately 1/2 compared to that formed by stamping conventional refractory materials, and
The aeration rate is reduced to about 1/30, and the crucible 1
The penetration of Zn vapor into the film can be greatly suppressed. Therefore, the amount of induced heat generated in the metal within the crucible 1 that is conducted through the crucible 1 can be effectively suppressed.
また、従来の不定形耐介材を誘導炉内でスタン
プして築炉するのに比べ、この発明では誘導炉外
に予め定形化されたるつぼ１を作り、この定形る
つぼ１を誘導炉内に装着するのであるから容易に
るつぼの外周に空気層４を形成できる。 In addition, compared to the conventional method of stamping and building a furnace by stamping an irregularly shaped support material in an induction furnace, in this invention, a pre-shaped crucible 1 is made outside the induction furnace, and this shaped crucible 1 is placed inside the induction furnace. Since the crucible is mounted, the air layer 4 can be easily formed around the outer periphery of the crucible.
さらに、上記るつぼ１を通して空気層４に漏れ
た蒸気は、空気層４に存在する空気によつて冷却
されて液化し、開口４ｃを通して、第１図中、矢
印で示すように、当該誘導炉外に排出される。こ
のように、るつぼ１内の金属蒸気が、該るつぼ１
を通して僅かに漏洩しようとも、断熱壁３および
誘導加熱コイル５は、空気層４内の空気により、
この高温の漏洩金属蒸気から遮蔽され、該誘導加
熱コイル５が電気絶縁劣化するとか、損焼される
のを、確実に、防止することができる。 Further, the steam leaking into the air layer 4 through the crucible 1 is cooled and liquefied by the air present in the air layer 4, and is passed through the opening 4c to the outside of the induction furnace as shown by the arrow in FIG. is discharged. In this way, the metal vapor in the crucible 1
Even if there is a slight leakage through the air, the heat insulating wall 3 and the induction heating coil 5 are
It is shielded from this high-temperature leaked metal vapor, and it is possible to reliably prevent the induction heating coil 5 from deteriorating its electrical insulation or burning out.
さらには、上記るつぼ１内に生起した誘導熱の
該るつぼ１を通して当該誘導炉外に漏洩する熱逸
散量を、空気層４および断熱壁３により有効に抑
制でき、それだけ、誘導加熱コイル５によりるつ
ぼ１内の金属に発生された熱量の利用率、即ち、
熱効率を高いものにして、誘導加熱に要する電力
消費量を低減し、節約することができる。 Furthermore, the amount of heat dissipation of the induction heat generated in the crucible 1 leaking out of the induction furnace through the crucible 1 can be effectively suppressed by the air layer 4 and the heat insulating wall 3, and to that extent, the induction heating coil 5 The utilization rate of the amount of heat generated in the metal in the crucible 1, i.e.
High thermal efficiency can reduce and save power consumption required for induction heating.
なお、上記空気層４には、適宜位置、たとえ
ば、第２図に示すように、るつぼ１の底部に該当
する位置に吸気口８，８を設けるとともに、該る
つぼ１の上端に該当する位置に排気口（図示しな
い）を設け、これ等の吸気口８、排気口を介し
て、適宜に冷却した新鮮な空気を、該空気層４に
循環するようにしてもよい。あるいは、上記排気
口を、るつぼ１の底部に該当する位置に設けるよ
うにしてもよい。このようにすれば、上述した空
気層４による断熱壁３および誘導加熱コイル５に
対する金属蒸気の遮蔽作用、および、るつぼ１内
の金属に発生した誘導熱量の外部への漏れ防止作
用を、さらに、効果的なものにすることができ
る。 The air layer 4 is provided with intake ports 8, 8 at appropriate positions, for example, as shown in FIG. An exhaust port (not shown) may be provided, and suitably cooled fresh air may be circulated into the air layer 4 through the intake port 8 and the exhaust port. Alternatively, the exhaust port may be provided at a corresponding position on the bottom of the crucible 1. In this way, the effect of shielding the metal vapor from the heat insulating wall 3 and the induction heating coil 5 by the air layer 4 described above and the effect of preventing the amount of induced heat generated in the metal in the crucible 1 from leaking to the outside can be further improved. can be made effective.
以上に説明したことから明らかなように、この
発明によれば、天然シリカ製の定形るつぼと、該
炉壁の外周に設けた断熱壁および誘導加熱コイル
との間に、空気層を設けて、上記るつぼ内で誘導
加熱されて溶融された金属蒸気が、当該るつぼを
通して漏れるのを有効に抑制するとともに、たと
え、金属蒸気がるつぼ外に漏出したとしても、空
気層により、断熱壁および誘導加熱コイルへの漏
洩を有効に阻止して、誘導加熱コイルの電気絶縁
劣化、および、その損焼を確実に防止し、かつ、
誘導熱の熱逸散を抑制して熱効率を高め、それだ
け、誘導加熱に要する消費電力を節約することが
できる優れた利点がある。 As is clear from the above explanation, according to the present invention, an air layer is provided between a shaped crucible made of natural silica and an insulating wall and an induction heating coil provided on the outer periphery of the furnace wall. The metal vapor melted by induction heating in the crucible is effectively prevented from leaking through the crucible, and even if the metal vapor leaks out of the crucible, the air layer prevents the heat insulating wall and the induction heating coil from leaking. to effectively prevent leakage to the induction heating coil, thereby reliably preventing deterioration of the electrical insulation of the induction heating coil and damage to the induction heating coil, and
This has the excellent advantage of suppressing the heat dissipation of induction heat, increasing thermal efficiency, and saving power consumption required for induction heating.
第１図は、この発明の一実施例の誘導炉の要部
断面図、第２図は、この発明の他の実施例の誘導
炉の要部断面図である。
１……るつぼ、１ａ……るつぼの外周面、２…
…基台、３……断熱壁、４……空気層、４ｃ……
開口、５……誘導加熱コイル、６……継鉄、７…
…枠体、８……吸気口。
FIG. 1 is a sectional view of a main part of an induction furnace according to an embodiment of the present invention, and FIG. 2 is a sectional view of a main part of an induction furnace according to another embodiment of the invention. 1... Crucible, 1a... Outer peripheral surface of the crucible, 2...
...Base, 3...Insulating wall, 4...Air layer, 4c...
Opening, 5... Induction heating coil, 6... Yoke, 7...
...Frame body, 8...Intake port.
Claims (1)
面を包囲する空気層を形成するとともに、該空気
層の外周に、耐火材製の断熱壁を介して誘導加熱
コイルを巻装して構成したことを特徴とする誘導
炉。 ２ 上記空気層に、吸気口および排気口を設け
て、該空気層内に、当該誘導炉の外部から吸入し
た新鮮な空気を循環するようにした特許請求の範
囲第１項に記載の誘導炉。[Claims] 1. An air layer surrounding the outer circumferential surface of a shaped crucible made of natural silica is formed, and an induction heating coil is provided around the outer circumference of the air layer via an insulating wall made of a refractory material. An induction furnace characterized by being configured by wrapping. 2. The induction furnace according to claim 1, wherein the air layer is provided with an intake port and an exhaust port to circulate fresh air sucked from outside the induction furnace into the air layer. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14334481A JPS5844694A (en) | 1981-09-10 | 1981-09-10 | Induction furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14334481A JPS5844694A (en) | 1981-09-10 | 1981-09-10 | Induction furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5844694A JPS5844694A (en) | 1983-03-15 |
| JPH0340475B2 true JPH0340475B2 (en) | 1991-06-19 |
Family
ID=15336598
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14334481A Granted JPS5844694A (en) | 1981-09-10 | 1981-09-10 | Induction furnace |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5844694A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1965151A2 (en) | 2000-10-23 | 2008-09-03 | Kawasaki Thermal Engineering Co., Ltd. | Absorption refrigerator |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62252091A (en) * | 1986-04-23 | 1987-11-02 | 富士電機株式会社 | Induction furnace |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5114829A (en) * | 1974-07-24 | 1976-02-05 | Echennu Garoo Jan | Yokinitaisuru taikaraininguchikuzohoho |
| JPS52150704A (en) * | 1976-06-11 | 1977-12-14 | Asahi Glass Co Ltd | Induction furnace |
-
1981
- 1981-09-10 JP JP14334481A patent/JPS5844694A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5114829A (en) * | 1974-07-24 | 1976-02-05 | Echennu Garoo Jan | Yokinitaisuru taikaraininguchikuzohoho |
| JPS52150704A (en) * | 1976-06-11 | 1977-12-14 | Asahi Glass Co Ltd | Induction furnace |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1965151A2 (en) | 2000-10-23 | 2008-09-03 | Kawasaki Thermal Engineering Co., Ltd. | Absorption refrigerator |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5844694A (en) | 1983-03-15 |
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