JPH039890Y2 - - Google Patents
Info
- Publication number
- JPH039890Y2 JPH039890Y2 JP1988077199U JP7719988U JPH039890Y2 JP H039890 Y2 JPH039890 Y2 JP H039890Y2 JP 1988077199 U JP1988077199 U JP 1988077199U JP 7719988 U JP7719988 U JP 7719988U JP H039890 Y2 JPH039890 Y2 JP H039890Y2
- Authority
- JP
- Japan
- Prior art keywords
- electric heater
- heating
- hot plate
- furnace
- heater element
- 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
- 229910052751 metal Inorganic materials 0.000 claims description 16
- 239000002184 metal Substances 0.000 claims description 16
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 12
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 9
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 9
- 229910052581 Si3N4 Inorganic materials 0.000 claims description 8
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims description 8
- 239000000395 magnesium oxide Substances 0.000 claims description 6
- 238000002844 melting Methods 0.000 claims description 4
- 230000008018 melting Effects 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 description 16
- 229910052782 aluminium Inorganic materials 0.000 description 11
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 11
- 238000000034 method Methods 0.000 description 7
- 150000002739 metals Chemical class 0.000 description 3
- 239000003921 oil Substances 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 239000011819 refractory material Substances 0.000 description 2
- 229910052725 zinc Inorganic materials 0.000 description 2
- 239000011701 zinc Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 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
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229910001120 nichrome Inorganic materials 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000011369 resultant mixture Substances 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
Landscapes
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
Description
【考案の詳細な説明】
［産業上の利用分野］
本考案は、アルミニユウム、亜鉛、銅、及びこ
れらの合金の溶融金属を加熱保持するために用い
られる金属溶融保持用熱板に関するものである。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a hot plate for holding molten metals used for heating and holding molten metals of aluminum, zinc, copper, and alloys thereof.
［従来の技術］
アルミニユウム等の溶融金属を加熱保持する炉
において、その加熱源としてはオイル又はガスを
用いたものと、電気ヒータを用いたものが知られ
ている。[Prior Art] Furnaces that heat and hold molten metal such as aluminum are known to use oil or gas as a heating source, and to use an electric heater.
第４図にオイル又はガスを用いる場合の炉１を
示す。この炉１において、オイル又はガスバーナ
２は炉１内の上部空間３に取り付けられており、
輻射加熱方式である。 FIG. 4 shows the furnace 1 when using oil or gas. In this furnace 1, an oil or gas burner 2 is installed in an upper space 3 within the furnace 1,
It is a radiant heating method.
第５，６図に電気ヒータ４を用いた加熱方式の
炉を示す。電気ヒータ４は第５図のように炉１内
の天蓋５の内側か、第６図のようにルツボ６の外
側に取り付けられている。 5 and 6 show a heating type furnace using an electric heater 4. The electric heater 4 is installed inside the canopy 5 in the furnace 1 as shown in FIG. 5, or outside the crucible 6 as shown in FIG.
そして、電気ヒータ４は第７図に示すように、
耐火物７内に埋め込んで使用されるか、第８図に
示すように耐火物７に支持ピン８を取り付け、こ
の支持ピン８の上に乗せて使用されている。 As shown in FIG. 7, the electric heater 4 is
It is used by being embedded in the refractory 7, or by attaching a support pin 8 to the refractory 7 and placing it on the support pin 8 as shown in FIG.
しかし、上記従来例において、第４図に示した
バーナ使用の加熱方式は、輻射方式のために熱効
率が悪く、又溶融金属の上部と底部においては温
度差が生じ、品質的に問題があると共に燃焼装置
の維持管理に手数を要し、安全性の面にも問題が
ある。 However, in the conventional example described above, the heating method using a burner shown in Fig. 4 has poor thermal efficiency because it is a radiation method, and there is a temperature difference between the top and bottom of the molten metal, which causes quality problems and The maintenance and management of the combustion equipment is time-consuming, and there are also safety issues.
次に、第５図に示した電気加熱方式は、電熱線
の寿命が酸化のために短く、メンテナンスが困難
であるという問題がある。又、第６図のルツボ方
式は、間接加熱方式のために熱効率が悪く、第５
図に示した方式と同等の熱量を得るためには電気
ヒータ４の量を多くしなければならず、装置が大
型化すると共に加熱、設備両面において、コスト
高である。 Next, the electric heating method shown in FIG. 5 has a problem in that the life of the heating wire is short due to oxidation and maintenance is difficult. In addition, the crucible method shown in Fig. 6 has poor thermal efficiency due to the indirect heating method.
In order to obtain the same amount of heat as the method shown in the figure, the number of electric heaters 4 must be increased, which increases the size of the device and increases costs in terms of both heating and equipment.
そこで、特開昭62−275551号公報には炭素を主
成分とする加熱板を耐火物で覆い、これを炉の壁
に取り付けて直接加熱するタンデイツシユが示さ
れている。 Therefore, Japanese Patent Application Laid-Open No. 62-275551 discloses a tundish in which a heating plate containing carbon as a main component is covered with a refractory material and is attached to the wall of the furnace to directly heat the heating plate.
又、実開昭58−28767号公報には発熱体の酸化
を防止する保持炉が示されている。 Further, Japanese Utility Model Application Publication No. 58-28767 discloses a holding furnace for preventing oxidation of a heating element.
更に、実開昭63−101799号公報にも同じように
ヒータ素子をセラミツクで被覆した電気ヒータを
溶融金属と直接接触する位置に挿入した保持炉が
示されている。 Furthermore, Japanese Utility Model Application Publication No. 63-101799 also discloses a holding furnace in which an electric heater whose heater element is covered with ceramic is inserted into a position where it comes into direct contact with molten metal.
［従来技術の課題］
しかし、上記公知例においては、、溶融金属中
にヒータを直接接触させた場合、溶融金属による
濡れの作用により経年的に被覆体が侵蝕されて絶
縁不良の問題が発生する。[Problems with the Prior Art] However, in the above-mentioned known example, when the heater is brought into direct contact with molten metal, the coating is eroded over time due to the wetting action of the molten metal, resulting in the problem of poor insulation. .
本考案は、熱効率がよく、安全で耐久性に富ん
だ金属溶融保持用熱板を提案するのが目的であ
る。 The purpose of the present invention is to propose a hot plate for holding metal melting that has good thermal efficiency, safety, and durability.
［課題を解決するための手段］
本考案は、上記目的を達成する手段として、次
の如き構成の金属溶融保持用熱板を提案する。[Means for Solving the Problems] As a means for achieving the above object, the present invention proposes a hot plate for holding metal melting having the following configuration.
電気ヒータ素子を電融マグネシヤ層で被覆し、
更にこの外を炭化珪素又は窒化珪素で被覆して成
る金属溶融保持用熱板。 Covering the electric heater element with a layer of fused magnesia,
The hot plate for holding metal melting is further coated on the outside with silicon carbide or silicon nitride.
［作 用］
上記熱板は、炉の内壁であつて溶融金属に直接
接する部位に取り付けられたり、溶融金属の中に
浸漬して使用される。電気ヒータ素子は通電によ
り発熱し、マグネシヤ及び炭化珪素又は窒化珪素
層を経由して溶融金属に熱を与え、これを加熱保
持する。[Function] The hot plate is used by being attached to a part of the inner wall of the furnace that is in direct contact with the molten metal, or by being immersed in the molten metal. The electric heater element generates heat when energized, gives heat to the molten metal via the magnesia and the silicon carbide or silicon nitride layer, and maintains the heat.
［実施例］
第１，２図は本考案の実施例を示すもので、１
０はニクロム線から成る電気ヒータ素子にして、
１１は電気ヒータ素子１０を被覆している内層で
ある。内層１１は絶縁材としての電融マグネシヤ
粒を結合剤で練り、偏平な四角形の型枠に入れて
成形したものである。[Example] Figures 1 and 2 show an example of the present invention.
0 is an electric heater element made of nichrome wire,
11 is an inner layer covering the electric heater element 10. The inner layer 11 is made by kneading electrofused magnesia grains as an insulating material with a binder, and molding the resultant mixture in a flat rectangular mold.
１２は前記成形した内層１１の外側に被覆した
外層にして、この外層１２は熱伝導性よく、然も
濡れ難い炭化珪素或いは窒化珪素等の耐火材が用
いられており、内層１１と同じように型枠に入れ
て偏平に成形したものである。 Reference numeral 12 denotes an outer layer coated on the outside of the molded inner layer 11, and this outer layer 12 is made of a refractory material such as silicon carbide or silicon nitride, which has good thermal conductivity and is difficult to wet. It is placed in a mold and formed into a flat shape.
１３は電気ヒータ素子１０の取出口にして、絶
縁チユーブが用いられている。 Reference numeral 13 serves as an outlet for the electric heater element 10, and an insulating tube is used.
なお、実施例において1＝50mm、2＝20mmで
ある。 In the example, 1 = 50 mm and 2 = 20 mm.
第３図は上記構成の熱板２０をアルミニユウム
加熱保持炉に用いた実施例を示すもので、１４は
炉本体、１５は溶融アルミニユウム、１６は保持
槽、１７は炭化珪素炉床板、１８は断熱材、１９
は蓋体にして、熱板２０は保持槽１６の側壁内面
に沿つて取り付けられている。なお、熱板２０は
このように保持槽１６の側壁内面ばかりでなく、
底面に取り付けてもよいし、溶融アルミニユウム
１８中に浸漬してもよい。 FIG. 3 shows an example in which the hot plate 20 having the above configuration is used in an aluminum heating and holding furnace, where 14 is the furnace body, 15 is molten aluminum, 16 is a holding tank, 17 is a silicon carbide hearth plate, and 18 is a heat insulation. Material, 19
is a lid, and the hot plate 20 is attached along the inner surface of the side wall of the holding tank 16. Note that the hot plate 20 is applied not only to the inner surface of the side wall of the holding tank 16 in this way, but also to the inner surface of the side wall of the holding tank 16.
It may be attached to the bottom surface or immersed in molten aluminum 18.
２１は前記熱板２０内の電気ヒータ素子１０に
対する結電ケーブルである。 Reference numeral 21 denotes a power connection cable for the electric heater element 10 inside the hot plate 20.
上記アルミニユウム加熱保持炉においては、給
電ケーブル２１から電気ヒータ素子１０に給電が
行なわれると、、この電気ヒータ素子１０が発熱
し、その熱は直接溶融アルミニユウム１５を加熱
する。 In the aluminum heating and holding furnace, when power is supplied to the electric heater element 10 from the power supply cable 21, the electric heater element 10 generates heat, and the heat directly heats the molten aluminum 15.
［本考案の効果］
本考案は以上の如き構成と作用から成るため、、
次の如き効果を奏する。[Effects of the present invention] Since the present invention consists of the above-mentioned structure and operation,
It has the following effects.
ａ 熱板は電気ヒータ素子が内層の高い電気低抗
を有する電融マグネシヤで被覆されているた
め、漏電防止に役立つと共にその外層は炭化珪
素又は窒化珪素で被覆されているため、アルミ
ニユウム、銅、亜鉛等の溶融金属による侵蝕を
防止して耐久性を増し、然も炭化珪素、窒化珪
素は高熱伝導性のため効率よく熱を伝えること
が出来る。a The heating plate has an electric heater element coated with an inner layer of fused magnesia with a high electric resistance, which helps prevent leakage, and the outer layer is coated with silicon carbide or silicon nitride, so it can be made of aluminum, copper, It prevents corrosion by molten metals such as zinc and increases durability, and silicon carbide and silicon nitride have high thermal conductivity and can efficiently transmit heat.
ｂ 表面材質が炭化珪素又は窒化珪素のため、表
面に溶融金属が付き難い。b Since the surface material is silicon carbide or silicon nitride, it is difficult for molten metal to adhere to the surface.
第１図は本考案に係る熱板の正面図、第２図は
断面図、第３図は本考案に係る熱板をアルミニユ
ウム加熱保持炉に取り付けた状態の断面図、第４
〜８図は従来例の説明図である。
１０…電気ヒータ素子、１１…内層（電融マグ
ネシヤ層）、１２…外層（炭化又は窒化珪素層）、
１４…炉本体、１５…溶融アルミニユウム、２０
…熱板。
Figure 1 is a front view of the hot plate according to the present invention, Figure 2 is a cross-sectional view, Figure 3 is a cross-sectional view of the hot plate according to the present invention attached to an aluminum heating and holding furnace, and Figure 4 is a cross-sectional view of the hot plate according to the present invention installed in an aluminum heating and holding furnace.
8 are explanatory diagrams of conventional examples. 10... Electric heater element, 11... Inner layer (electrofused magnesia layer), 12... Outer layer (silicon carbide or nitride layer),
14...furnace body, 15...molten aluminum, 20
...Hot plate.
Claims (1)
更にこの外を炭化珪素又は窒化珪素で被覆して成
る金属溶融保持用熱板。 Covering the electric heater element with a layer of fused magnesia,
The hot plate for holding metal melting is further coated on the outside with silicon carbide or silicon nitride.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988077199U JPH039890Y2 (en) | 1988-06-10 | 1988-06-10 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988077199U JPH039890Y2 (en) | 1988-06-10 | 1988-06-10 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH021556U JPH021556U (en) | 1990-01-08 |
| JPH039890Y2 true JPH039890Y2 (en) | 1991-03-12 |
Family
ID=31302194
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1988077199U Expired JPH039890Y2 (en) | 1988-06-10 | 1988-06-10 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH039890Y2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2558169Y2 (en) * | 1992-04-27 | 1997-12-17 | ニチアス株式会社 | Hot plate for molten metal container |
| JP4534048B2 (en) * | 1998-10-28 | 2010-09-01 | 有明セラコ株式会社 | Metal molten metal bowl |
| JP6318849B2 (en) * | 2014-05-23 | 2018-05-09 | 新日鐵住金株式会社 | Weir refractory construction method of induction heating type tundish and repair method of weir refractory constructed by this method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5828767B2 (en) * | 1976-03-31 | 1983-06-17 | セイコーインスツルメンツ株式会社 | Width shear oscillator |
| JPS62275551A (en) * | 1986-05-23 | 1987-11-30 | Nippon Kokan Kk <Nkk> | Tundish for continuous casting |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5828767U (en) * | 1981-08-19 | 1983-02-24 | 東芝機械株式会社 | Heat retention furnace |
| JPS63101799U (en) * | 1986-12-22 | 1988-07-02 |
-
1988
- 1988-06-10 JP JP1988077199U patent/JPH039890Y2/ja not_active Expired
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5828767B2 (en) * | 1976-03-31 | 1983-06-17 | セイコーインスツルメンツ株式会社 | Width shear oscillator |
| JPS62275551A (en) * | 1986-05-23 | 1987-11-30 | Nippon Kokan Kk <Nkk> | Tundish for continuous casting |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH021556U (en) | 1990-01-08 |
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