JPH0222135Y2 - - Google Patents
Info
- Publication number
- JPH0222135Y2 JPH0222135Y2 JP1985203876U JP20387685U JPH0222135Y2 JP H0222135 Y2 JPH0222135 Y2 JP H0222135Y2 JP 1985203876 U JP1985203876 U JP 1985203876U JP 20387685 U JP20387685 U JP 20387685U JP H0222135 Y2 JPH0222135 Y2 JP H0222135Y2
- Authority
- JP
- Japan
- Prior art keywords
- bricks
- brick
- ladle
- carbon
- layer
- 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
- 239000011449 brick Substances 0.000 claims description 133
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 17
- 229910052799 carbon Inorganic materials 0.000 claims description 17
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 16
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical compound [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 claims description 15
- 239000005909 Kieselgur Substances 0.000 claims description 11
- 229910052751 metal Inorganic materials 0.000 claims description 9
- 239000002184 metal Substances 0.000 claims description 9
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 8
- 238000009749 continuous casting Methods 0.000 claims description 8
- 239000004575 stone Substances 0.000 claims description 7
- 239000000395 magnesium oxide Substances 0.000 claims description 4
- 150000002739 metals Chemical class 0.000 claims description 2
- 229910000831 Steel Inorganic materials 0.000 description 17
- 239000010959 steel Substances 0.000 description 17
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 14
- 229910052845 zircon Inorganic materials 0.000 description 12
- 238000009413 insulation Methods 0.000 description 11
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 description 11
- 239000002893 slag Substances 0.000 description 7
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 6
- 229910052742 iron Inorganic materials 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000010276 construction Methods 0.000 description 4
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 3
- 229910052791 calcium Inorganic materials 0.000 description 3
- 239000011575 calcium Substances 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 239000000377 silicon dioxide Substances 0.000 description 3
- 238000004901 spalling Methods 0.000 description 3
- 238000003723 Smelting Methods 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000004570 mortar (masonry) Substances 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 238000009991 scouring Methods 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 229910000640 Fe alloy Inorganic materials 0.000 description 1
- 229910001021 Ferroalloy Inorganic materials 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 235000008098 Oxalis acetosella Nutrition 0.000 description 1
- 240000007930 Oxalis acetosella Species 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 description 1
- 229910001634 calcium fluoride Inorganic materials 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000005094 computer simulation Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000011465 paving brick Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
Landscapes
- Compositions Of Oxide Ceramics (AREA)
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
Description
「産業上の利用分野」
本考案は、鉄鋼の製造、製鋼、または鋳物の製
造に際して各種の金属の連続鋳造に用いられる取
鍋に関する。
「従来の技術及びその問題点」
従来の鋼の生産工程に用いられる取鍋において
は、取鍋精練をするために、取鍋の鉄皮内におけ
るワーク煉瓦層として、側煉瓦には中性のハイア
ルミナ質煉瓦が用いられ、スラブラインには塩基
性のマグネシヤカーボン煉瓦が用いられ、また煉
瓦敷には耐熱性に富むジルコン煉瓦が用いられ
た。そして、精練に際しては屑鉄および合金鉄な
どの主材料の他に副材料としてフラツクスが取鍋
内に投入される。上記従来構造の取鍋は、大型電
気炉、取鍋精練炉、直空脱ガスおよび連続鋳造と
いう一連の複合プロセスによつてブルームの製造
に使用されると、取鍋内の溶鋼注入後の残留スラ
グを排滓する際に、取鍋が上下に転回される時煉
瓦敷が落下するという問題があつた。そして、耐
用回数が半分以下に低下した。
尚、取鍋等の溶融金属容器の構造としては、例
えば実願昭59−9497号（実開昭60−121199号）に
記載されたものがある。
上記従来技術により開示された溶融金属類容器
の底部耐火物構造は、パーマネントライニングと
ウエアライニングとに分けて築造された４層の底
部耐火物構造であり、容器外殻側より１層目を耐
熱煉瓦、２層目を低級なけい石質系煉瓦（パーマ
煉瓦）とし、３層目は中央部が高級なアルミナ質
またはジルコン質、またはマグクロ質煉瓦、他は
低級なけい石質系煉瓦（準パーマ煉瓦）とし、４
層目は中央部が高級なアルミナ質またはジルコン
質またはマグクロ質煉瓦、他は低級な同材質の煉
瓦もしくは中央部と同材質で薄肉化した煉瓦で構
成したものである。
しかしながら、上記従来技術は容器外殻から１
層目に用いられる断熱煉瓦がろう石煉瓦のような
通常の断熱煉瓦であるため、断熱効果が十分でな
く溶鋼の温度が下がつてしまい鋳型等への注入末
期の残存溶鋼が凝固してしまう場合があり、この
ため容器への注入温度を予め抜熱温度を見込んだ
高めの温度として、前記残存溶鋼の凝固を防止す
るようにしなければならないから、電気炉の昇温
エネルギが余分に必要となり、操炉時間も長くな
る等生産性が悪いという問題点がある。
さらに、ウエア煉瓦の損耗や煉瓦間の目地部の
溶損、あるいは熱的、構造的なスポーリングによ
る異常損耗を前提としてなされたもので、前記し
たように溶鋼注入後の残留スラグを排滓する際、
取鍋を上下に転回すると煉瓦敷が落下するという
問題点がある。
また、特開昭56−59577号公報には、側壁およ
び煉瓦敷に炭素含有煉瓦を用い、その目地材とし
てアルミナ系モルタルを、そして前記炭素含有煉
瓦の下部にある中性あるいは酸性煉瓦の１種また
は２種以上あるいはこれらと塩基性煉瓦、炭素含
有煉瓦の１種または２種以上とを使用した取鍋等
の溶融金属容器が開示されている。しかしなが
ら、上記従来技術は溶融金属容器の煉瓦敷に、容
器外殻側から第１層目をろう石煉瓦、第２層目を
セミジルコン煉瓦を用いているものであつて、い
ずれも断熱対策が採られておらず、また第３層目
の炭素含有煉瓦は熱伝導率が高いので、溶鋼温度
を予め抜熱温度を見込んだ高めの温度とする必要
がある点で、生産性が悪いという問題点がある。
「考案が解決しようとする問題点」
本考案は、上記の問題点を解決するためになさ
れたものであり、煉瓦敷の断熱効果を高め、溶鋼
温度の低下を抑えて生産性を向上するとともに、
煉瓦敷の落下を防止し、煉瓦敷の耐用回数を向上
することを目的とする。
「問題点を解決するための手段」
しかして、本考案によれば、煉瓦敷を、外殻鉄
皮側から数えて第３層にカーボンを含有する耐熱
煉瓦を用い、第２層にろう石煉瓦およびまたはシ
ヤモツト煉瓦を用い、第１層に珪藻土煉瓦を用い
て三層に構成したことを特徴とする取鍋が提案さ
れる。
「作用」
上記構成によれば、外殻鉄皮側から数えて第３
層に用いるカーボンを含有する耐熱煉瓦は、熱伝
導率が高く放熱性に問題があるが金属の溶湯に対
して濡れ性が低いため容易にはその金属の溶湯中
のスラグと化学反応を生じないので、スラグによ
つて浸食されることが少なくなる。第２層に用い
るろう石煉瓦およびまたはシヤモツト煉瓦はハイ
アルミナであり耐用性が高いので溶鋼の浸透によ
つて取鍋を破壊するのを防止する。また、第１層
に用いる珪藻土煉瓦は気孔に富み断熱性が非常に
高く、金属の溶湯が早期に冷えて凝固することを
防止する。
「実施の態様」
本考案の第一の実施の態様によれば、前記カー
ボンを含有する耐熱煉瓦はアルミナカーボン煉瓦
であり、この態様によれば、比較的に安価なアル
ミナカーボン煉瓦の使用により、原価を低減でき
る利点がある。
本考案の第二の態様によれば、前記カーボンを
含有する耐熱煉瓦はマグネシヤカーボン煉瓦であ
り、この態様によれば、原価は高いが塩基性スラ
グに対しては容易に浸食されないため、充分に敷
煉瓦の落下が防止される。
「考案の背景」
取鍋における敷煉瓦が落下するという問題が生
じた際に、本考案者は、その原因を究明するため
使用後のジルコン煉瓦を切断し煉瓦組織の顕微鏡
写真を撮影したところ、使用によつて変質した煉
瓦組織には空間が多いことが認められた。また、
赤外線分析機によりその変質した煉瓦組織に含ま
れる元素を分析したところ、カルシウム、アルミ
ニウム、シリコン、チタン、およびマグネシウム
などの元素が検出され、その中でもカルシウムの
検出範囲が最大であり、約５cmに及ぶことが見出
された、この結果よりして、煉瓦敷として用いら
れたジルコン煉瓦は、その煉瓦中のシリカがスラ
グ中に含まれる酸化カルシウムまたは弗化カルシ
ウムと反応して低融点のカルシウム・シリカ・ガ
ラス層を増大させ、ジルコン煉瓦層の延びおよび
欠落（スポーリング）を生じ、煉瓦層の弱化によ
る溶損を生じるという繰り返しによつて、浸食さ
れることが推定された。
本考案は、以上の原因究明に基づいてなされた
ものである。
「実施例」
（第１の実施例）
第１図に示すごとく、取鍋１の煉瓦敷２を、ア
ルミナカーボン煉瓦３、ろう石煉瓦４、および断
熱煉瓦５により三層に施工した。該断熱煉瓦５は
JIS（日本工業規格）におけるＣ−３煉瓦（以下珪
藻土煉瓦と称する）であつて、断熱性の非常に高
いものである。ワーク煉瓦層をなすアルミナカー
ボン煉瓦３としては、ACTEX（商品名）が用い
られ、そのアルミナカーボン煉瓦３の化学成分お
よび物性は次頁の表１に示される如くである。
"Industrial Application Field" The present invention relates to a ladle used for continuous casting of various metals in the production of steel, steel, or casting. "Prior art and its problems" In the ladle used in the conventional steel production process, in order to perform ladle scouring, a neutral layer of side bricks is used as a layer of work bricks within the skin of the ladle. High alumina bricks were used, basic magnesia carbon bricks were used for the slab line, and highly heat resistant zircon bricks were used for the brick paving. During scouring, in addition to the main materials such as scrap iron and ferroalloy, flux is added as an auxiliary material into the ladle. When a ladle with the above conventional structure is used to produce bloom through a series of complex processes including a large electric furnace, a ladle smelting furnace, direct air degassing, and continuous casting, the ladle remains in the ladle after pouring the molten steel. When removing the slag, there was a problem that the brick pavers would fall when the ladle was turned up and down. As a result, the service life was reduced by more than half. Incidentally, the structure of a molten metal container such as a ladle is described in, for example, Utility Model Application No. 59-9497 (Utility Model Application No. 60-121199). The bottom refractory structure of the molten metal container disclosed in the above-mentioned prior art is a four-layer bottom refractory structure constructed separately into a permanent lining and a wear lining, and the first layer from the outer shell side of the container is heat-resistant. The second layer is made of low-grade siliceous bricks (permanent bricks), the third layer is made of high-grade alumina, zircon, or maguro-based bricks in the center, and the rest is made of low-grade silica bricks (semi-grade). Permanent brick) and 4
The layers are made of high-grade alumina, zircon, or maguro-based bricks in the center, and lower-grade bricks made of the same material, or thinner bricks made of the same material as the center. However, the above-mentioned conventional technology
Since the insulation bricks used in the layers are ordinary insulation bricks such as waxite bricks, the insulation effect is not sufficient and the temperature of the molten steel drops, causing the remaining molten steel at the end of pouring into the mold to solidify. For this reason, it is necessary to set the injection temperature into the container at a high temperature that takes into account the heat extraction temperature in advance to prevent solidification of the remaining molten steel, which requires extra heating energy from the electric furnace. However, there are problems such as poor productivity such as long furnace operation time. Furthermore, this was done on the assumption that there would be wear and tear of the wear bricks, melting of the joints between bricks, or abnormal wear due to thermal or structural spalling. edge,
There is a problem that when the ladle is turned up and down, the brick pavers fall. Furthermore, JP-A No. 56-59577 discloses that carbon-containing bricks are used for side walls and brick pavers, alumina-based mortar is used as a joint material, and a type of neutral or acidic brick is placed below the carbon-containing bricks. Alternatively, a molten metal container such as a ladle using two or more of these or one or more of basic bricks and carbon-containing bricks is disclosed. However, in the above-mentioned conventional technology, the first layer from the outer shell side of the container is made of wax stone bricks, and the second layer is made of semi-zircon bricks for the brick paving of the molten metal container, and heat insulation measures are used in both cases. Furthermore, since the carbon-containing bricks in the third layer have high thermal conductivity, the molten steel temperature needs to be set to a high temperature that takes into account the heat removal temperature, which leads to poor productivity. There is. ``Problems that the invention attempts to solve'' This invention was made to solve the above problems, and it improves the heat insulation effect of the brick paving, suppresses the drop in the temperature of molten steel, and improves productivity. ,
The purpose is to prevent brick paving from falling and to increase the number of times the brick paving can be used. "Means for Solving the Problem" According to the present invention, the third layer of the brick paving, counting from the outer shell side, is made of heat-resistant bricks containing carbon, and the second layer is made of wax stone. A ladle is proposed which is characterized in that it is constructed in three layers using bricks and/or shamrock bricks, with the first layer being diatomaceous earth bricks. "Function" According to the above configuration, the third
The heat-resistant bricks containing carbon used for the layer have high thermal conductivity and have a problem with heat dissipation, but they have low wettability with molten metal, so they do not easily cause chemical reactions with slag in the molten metal. Therefore, it is less likely to be eroded by slag. The waxite bricks and/or Shamotsu bricks used for the second layer are made of high alumina and have high durability, thus preventing the ladle from being destroyed by penetration of molten steel. Furthermore, the diatomaceous earth brick used for the first layer is rich in pores and has very high heat insulation properties, which prevents the molten metal from cooling and solidifying prematurely. "Embodiment" According to the first embodiment of the present invention, the heat-resistant brick containing carbon is an alumina carbon brick, and according to this embodiment, by using the relatively inexpensive alumina carbon brick, It has the advantage of reducing cost. According to a second aspect of the present invention, the heat-resistant brick containing carbon is a magnesia carbon brick, and according to this aspect, although the cost is high, it is not easily eroded by basic slag, so it is sufficient. This will prevent the bricks from falling. ``Background of the invention'' When a problem arose with paving bricks falling in a ladle, the inventor cut the used zircon bricks and took microscopic photographs of the brick structure in order to investigate the cause. It was observed that there were many spaces in the brick structure that had changed due to use. Also,
When the elements contained in the altered brick structure were analyzed using an infrared analyzer, elements such as calcium, aluminum, silicon, titanium, and magnesium were detected, and among these, the detection range of calcium was the largest, extending to about 5 cm. From this result, it was found that zircon bricks used as brick pavers react with the calcium oxide or calcium fluoride contained in the slag to form calcium silica with a low melting point. - It was estimated that erosion would occur by repeatedly increasing the glass layer, causing elongation and spalling of the zircon brick layer, and causing erosion due to weakening of the brick layer. The present invention has been made based on the investigation of the causes described above. "Example" (First Example) As shown in FIG. 1, the brick paving 2 of the ladle 1 was constructed in three layers of alumina carbon bricks 3, waxite bricks 4, and heat insulating bricks 5. The insulation brick 5 is
It is a C-3 brick (hereinafter referred to as diatomaceous earth brick) according to JIS (Japanese Industrial Standards) and has extremely high heat insulation properties. ACTEX (trade name) is used as the alumina carbon brick 3 forming the work brick layer, and the chemical composition and physical properties of the alumina carbon brick 3 are as shown in Table 1 on the next page.
【表】
ろう石煉瓦４は通常のセミワーク煉瓦層に用い
られるろう石煉瓦と同じ成分である。パーマ煉瓦
層の断熱煉瓦５は前記したように珪藻土煉瓦であ
り、アルミナカーボン煉瓦３は熱伝導率が従来の
ジルコン煉瓦に比して大きいので、鉄皮６の外表
面の温度上昇を防止するため、鉄皮６の内側とろ
う石煉瓦４の間に施工された。
その結果は、第２図に示すごとくであり、煉瓦
敷２の落下件数はワーク煉瓦層がアルミナカーボ
ン煉瓦３に切替えられた昭和60年５月以降におい
てゼロになつた。これに比して、従来のジルコン
煉瓦の落下率は第２図の上部に示されるごとく最
大76.8％であり、落下件数は月間最大６件であつ
たが、本考案のアルミナカーボン煉瓦に変えるこ
とで落下は防止できた。
（第２の実施例）
第１の実施例と同じく、第１図に示された煉瓦
施工図により施工された取鍋１を用いて連続鋳造
を行ない敷耐用回数を求めたところ、第３図に示
されるごとく、アルミナカーボン煉瓦に切替えが
行われる以前においては、平均の敷耐用回数が
22.4回であつたものを、本考案によりアルミナカ
ーボン煉瓦に切替えが行われた以後は平均の敷耐
用回数が35.4回になり、敷耐用回数の顕著な増加
が認められた。
（第３の実施例）
第４図Ａ，Ｂ，Ｃ，Ｄ，Ｅに示されるごとく、
鉄皮の上にワーク、セミワークおよびパーマ煉瓦
層となる煉瓦を配列し、コンピユータでのシミユ
レーシヨンにより鉄皮外表面の温度が求められた
ところ、第５図に示されるごとく本考案のアルミ
ナカーボン煉瓦、ろう石煉瓦および珪藻土煉瓦に
よる配列Ｃ，Ｅでは、比較例Ｂ，Ｄに比して約60
℃も鉄皮外表面の温度を低下でき、従来例Ａとほ
ぼ同等の鉄皮外表面の温度になることが求められ
た。従つて、本考案の取鍋における鉄皮の外表面
からの放熱は、従来と同等に維持されることが推
定された。
また、第６図に示されるように、取鍋１内の溶
鋼とタンデイツシユ７内の溶鋼との温度差が求め
られたところ、第７図に示されるごとく、比較例
であるアルミナカーボン煉瓦のみの場合に較べて
珪藻土煉瓦を有する本考案の場合の溶鋼の温度差
は1.4℃であり有意差のある降下が認められた。
また、従来のジルコン煉瓦との温度差は0.3℃で
あり、有意差のある上昇は認められなかつた。更
に、第６図におけるタンデイツシユ７の出口にあ
るノズル８は連続鋳造時において閉塞が生じなか
つた。
（第４の実施例）
本考案により第１図に示されるごとく煉瓦敷２
を施工された取鍋と、従来のごとくジルコン煉瓦
一層とろう石煉瓦二層による取鍋について、連続
鋳造による鋳造高の重量当りの原価をジルコン煉
瓦の施工費を１として比較したところ、表２に示
されるごとく、本考案の取鍋においては、モルタ
ル費のみは微増するが、煉瓦費、補修材費および
施工費のすべてにおいて有利であり、全体として
断然有利であることが求められた。[Table] The wax stone brick 4 has the same composition as the wax stone brick used for normal semi-worked brick layers. As mentioned above, the insulation bricks 5 of the permanent brick layer are diatomaceous earth bricks, and since the alumina carbon bricks 3 have higher thermal conductivity than conventional zircon bricks, they are used to prevent the temperature rise on the outer surface of the iron skin 6. , was constructed between the inside of the iron skin 6 and the waxite bricks 4. The results are shown in Figure 2, and the number of falling brick pavers 2 became zero after May 1985, when the work brick layer was switched to alumina carbon bricks 3. In comparison, the falling rate of conventional zircon bricks was a maximum of 76.8%, as shown in the upper part of Figure 2, and the number of falls was a maximum of 6 per month, but by changing to the alumina carbon bricks of the present invention. This prevented the fall. (Second Example) As in the first example, continuous casting was performed using the ladle 1 constructed according to the brick construction drawing shown in FIG. As shown in Figure 2, before the switch to alumina carbon bricks, the average number of times the bricks were laid was
After switching from 22.4 times to alumina carbon bricks using the present invention, the average number of times of laying increased to 35.4, a remarkable increase in the number of times of laying. (Third Example) As shown in Figure 4 A, B, C, D, and E,
Work, semi-work, and bricks forming a permanent brick layer were arranged on the steel shell, and the temperature of the outer surface of the steel shell was determined by computer simulation. As shown in Fig. 5, the alumina carbon brick of the present invention, Arrangements C and E made of waxite bricks and diatomaceous earth bricks have a lower resistance of approximately 60% compared to Comparative Examples B and D.
It was also required that the temperature of the outer surface of the iron shell could be lowered in °C, and the temperature of the outer surface of the iron shell should be approximately the same as that of Conventional Example A. Therefore, it was estimated that the heat radiation from the outer surface of the iron shell in the ladle of the present invention was maintained at the same level as in the past. In addition, as shown in Fig. 6, when the temperature difference between the molten steel in the ladle 1 and the molten steel in the tundish 7 was determined, as shown in Fig. 7, it was found that The difference in temperature of the molten steel in the case of the present invention with diatomaceous earth bricks was 1.4°C, which was a significant drop.
In addition, the temperature difference with conventional zircon bricks was 0.3°C, and no significant increase was observed. Furthermore, the nozzle 8 located at the outlet of the tundish 7 in FIG. 6 did not become clogged during continuous casting. (Fourth Embodiment) According to the present invention, a brick paving 2 as shown in FIG.
A comparison was made of the cost per weight of casting height by continuous casting for a ladle constructed with 1 layer of zircon bricks and a ladle of 2 layers of waxite bricks as in the past, with the construction cost of zircon bricks set at 1.Table 2 As shown in , the ladle of the present invention slightly increases only the mortar cost, but is advantageous in all aspects of brick cost, repair material cost, and construction cost, and was required to be definitely advantageous as a whole.
【表】
（第５の実施例）
従来構造によりパーマ煉瓦層としてろう石煉瓦
が用いられる場合と、本考案の構造によりパーマ
煉瓦層に珪藻土煉瓦が用いられた場合の原価を煉
瓦費の差を１として求めたところ、表３に示され
るごとく、煉瓦費は若干上昇するが、取鍋精練炉
５℃上昇による電力費が不要であるためその合計
としては、連続鋳造による鋳造高の重量当りの原
価は有利であることが求められた。[Table] (Fifth Example) Calculate the difference in brick costs between the conventional structure in which wax stone bricks are used as the permanent brick layer and the structure of the present invention in which diatomaceous earth bricks are used in the permanent brick layer. 1, as shown in Table 3, the brick cost will rise slightly, but since the electricity cost due to the 5°C rise in the ladle smelting furnace is unnecessary, the total will be the same as the weight of the cast height due to continuous casting. The cost was required to be advantageous.
【表】
また、珪藻土煉瓦の耐圧強度の変化は表４に示
される如くであり、煉瓦の全張り施工を３回行な
つた３炉代の使用后においても未だ使用可能な耐
圧強度および熱伝導率が保たれていた。[Table] In addition, the changes in pressure resistance of diatomaceous earth bricks are as shown in Table 4, and even after three full brick installations and three furnaces, the pressure resistance and thermal conductivity are still usable. rate was maintained.
【表】
（その他の実施例）
以上の第１から第５の実施例においては、ワー
ク煉瓦層としてアルミナカーボン煉瓦が用いられ
たが、塩基性煉瓦であるマグネシヤカーボン煉瓦
はアルミナカーボン煉瓦と同様にカーボンを含有
しまた同等の物性を持ち、かつ塩基性スラグに対
してスポーリングおよび溶損を生じないため、本
考案の取鍋に使用可能である。また、セミワーク
煉瓦層としては、ろう石煉瓦と同様にアルミナ−
シリカを主成分とするシヤモツト煉瓦が使用され
る。
「効果」
以上述べたように、本考案の取鍋は上記の構成
を有し、煉瓦敷の外殻鉄皮側から第１層目に断熱
性の非常に高い珪藻土煉瓦を用いることにより、
断熱効果を高めることができ、鋳型への注入末期
に溶鋼の温度低下によるノズルの閉塞などの不都
合はなく、予め溶鋼の温度を抜熱温度を見込んだ
高温にする必要もないから省エネや操炉時間の短
縮を図つて生産性の向上に寄与でき、さらに、煉
瓦敷の落下を防止し、煉瓦敷の耐用回数を上昇す
ることができるので、コストが大幅に低減される
などの優れた効果がある。[Table] (Other Examples) In the first to fifth examples above, alumina carbon bricks were used as the work brick layer, but magnesia carbon bricks, which are basic bricks, are similar to alumina carbon bricks. It can be used in the ladle of the present invention because it contains carbon and has the same physical properties as basic slag, and does not cause spalling or melting damage to basic slag. In addition, as for the semi-work brick layer, alumina is used as well as the wax stone brick.
Shamotsu bricks, whose main component is silica, are used. "Effects" As mentioned above, the ladle of the present invention has the above structure, and by using diatomaceous earth bricks with very high heat insulation properties as the first layer from the outer shell side of the brick paving,
The insulation effect can be enhanced, there is no problem such as nozzle clogging due to a drop in the temperature of the molten steel at the end of pouring into the mold, and there is no need to raise the temperature of the molten steel to a high temperature in advance to account for the heat extraction temperature, resulting in energy savings and furnace operation. It can contribute to improving productivity by shortening time, and it can also prevent brick paving from falling and increase the number of times the brick paving can be used, which has excellent effects such as a significant cost reduction. be.
第１図は本考案の実施例における取鍋の煉瓦施
工図、第２図は煉瓦敷落下率および落下件数の推
移を示すグラフ、第３図は敷耐用回数の推移を示
すグラフ、第４図はコンピユータでのシミユレー
シヨンを行うための煉瓦敷の構成を示す断面図、
第５図はシミユレーシヨン結果を示すグラフ、第
６図は連続鋳造における取鍋とタンデイツシユの
配置を示す断面図、第７図は温度降下の比較を示
すグラフである。
１……取鍋、２……煉瓦敷、３……アルミナカ
ーボン煉瓦、４……ろう石煉瓦、５……珪藻土煉
瓦、６……鉄皮、７……タンデイツシユ、８……
ノズル。
Figure 1 is a drawing of the ladle brick construction according to an embodiment of the present invention, Figure 2 is a graph showing the rate of falling brick paving and changes in the number of falls, Figure 3 is a graph showing changes in the number of times the brick pavers are laid, and Figure 4 is is a cross-sectional view showing the configuration of a brick paving for simulation on a computer,
FIG. 5 is a graph showing simulation results, FIG. 6 is a sectional view showing the arrangement of ladle and tundish in continuous casting, and FIG. 7 is a graph showing a comparison of temperature drops. 1... ladle, 2... brick paving, 3... alumina carbon brick, 4... waxite brick, 5... diatomaceous earth brick, 6... iron skin, 7... tandate, 8...
nozzle.
Claims (1)
いて、 煉瓦敷を、外殻鉄皮側から数えて第３層にカ
ーボンを含有する耐熱煉瓦を用い、第２層にろ
う石煉瓦およびまたはシヤモツト煉瓦を用い、
第１層に珪藻土煉瓦を用いて三層に構成したこ
とを特徴とする取鍋。 (2) 前記カーボンを含有する耐熱煉瓦が、アルミ
ナカーボン煉瓦であることを特徴とする実用新
案登録請求の範囲第１項記載の取鍋。 (3) 前記カーボンを含有する耐熱煉瓦が、マグネ
シヤカーボン煉瓦であることを特徴とする実用
新案登録請求の範囲第１項記載の取鍋。[Scope of Claim for Utility Model Registration] (1) In a ladle used for continuous casting of various metals, the third layer counting from the outer shell side is made of heat-resistant bricks containing carbon; Using wax stone bricks and or shamoto bricks in two layers,
A ladle characterized by having a three-layer structure using diatomaceous earth bricks for the first layer. (2) The ladle according to claim 1, wherein the carbon-containing heat-resistant brick is an alumina carbon brick. (3) The ladle according to claim 1, wherein the carbon-containing heat-resistant brick is a magnesia carbon brick.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985203876U JPH0222135Y2 (en) | 1985-12-30 | 1985-12-30 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985203876U JPH0222135Y2 (en) | 1985-12-30 | 1985-12-30 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62113856U JPS62113856U (en) | 1987-07-20 |
| JPH0222135Y2 true JPH0222135Y2 (en) | 1990-06-14 |
Family
ID=31169617
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1985203876U Expired JPH0222135Y2 (en) | 1985-12-30 | 1985-12-30 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0222135Y2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5659577A (en) * | 1979-10-17 | 1981-05-23 | Kyushu Refract Co Ltd | Molten metal vessel such as ladle |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60121199U (en) * | 1984-01-26 | 1985-08-15 | 住友金属工業株式会社 | Bottom refractory structure of molten metal container |
-
1985
- 1985-12-30 JP JP1985203876U patent/JPH0222135Y2/ja not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5659577A (en) * | 1979-10-17 | 1981-05-23 | Kyushu Refract Co Ltd | Molten metal vessel such as ladle |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62113856U (en) | 1987-07-20 |
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