JPS5996211A - Immersion pipe for vacuum degassing apparatus - Google Patents

Abstract

PURPOSE:To prevent the cracking of a refractory brick layer and to extend the life of the resulting immersion pipe by filling a castable refractory contg. a shrinkable material into the space between a metallic cylinder and the inner brick layer to absorb the thermal expansion of the brick layer. CONSTITUTION:A castable refractory 6 contg. <=60vol% shrinkable material is filled into the space between a metallic cylinder 2 and a refractory brick layer 5 lining the cylinder 2. A castable refractory layer 4 is formed around the cylinder 2. The life of the resulting immersion pipe is extended because the thermal expansion of the brick layer 5 is absorbed in the shrinkable refractory 6 to prevent the cracking of the layer 5.

Description

【発明の詳細な説明】 本発明は、耐用性にすぐれた４１′４造を有する真空脱
ガス装置用浸漬管に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an immersion tube for a vacuum degassing device having a 41'4 structure with excellent durability.

ＲＨ式、ＤＨ式などの真空脱がス装置において、ｍ　Ｃ
岡を真空４’Ｌ’ｌ内へ吸引または排出する浸漬管は、
浴鋼の高熱と、醇銅の通過によって損耗が激しい。In vacuum degassing equipment such as RH type and DH type, m C
The dip tube that sucks or expels the oka into the vacuum 4'L'l is
The high heat of the bath steel and the passage of the molten copper cause severe wear and tear.

そこで、反偵管は内張りｉ制大物がこの損耗で残存が少
なくなるとフランジにより取外し、別途準備したしだ活
管と取替え出来るようになっている。Therefore, the anti-reflection pipe is designed so that when the inner-lined large pipe is worn out and only a few remain, it can be removed with a flange and replaced with a separately prepared live pipe.

第１図は、一般的な浸漬管の断面構造を示し、第２図は
そのＡ、　−Ａ繰１祈百図であり、フラン・ソ（１）を
イ、づｊえた金し４製円筒（２）の外周はスタッド（３
）により牽引支持された不定形耐火物Ｉ；づ（４）で覆
わ、ｌｔている。内周は酬火レンガ層（５）で内張シ逼
れると共に、この耐火レンが層（５）と円筒との間に不
定形］耐火物（６）が充填されている。耐火レンガ信（
５）は、この不定形耐火物（６）による迫りと、円筒（
２）の内周に６設した受金（７）で支持嘔れている。Figure 1 shows the cross-sectional structure of a general immersion tube, and Figure 2 shows its A, -A 100-page diagram, showing a cylindrical structure made of gold plated with Franc-So (1). The outer periphery of (2) is a stud (3
) is covered with a monolithic refractory I; The inner periphery is lined with a refractory brick layer (5), and an amorphous refractory (6) is filled between the layer (5) and the cylinder. Firebrick belief (
5) is the combination of this monolithic refractory (6) and the cylinder (
It is supported by six receivers (7) placed on the inner circumference of 2).

このように：１．′、を成された浸漬管は、内部をｍ鋼
が流通すると、高温により耐火レンガ層が熱膨張を生じ
、浸漬管は底張の逃げしるか殆どないので、これが÷染
応力となって耐火レンガ層に重装を発生させる。この亀
裂が発生すると耐火レンが層は剥＋＋；１．　したり、
亀裂中へ８踏スラグの浸入によって損耗が促進されると
いう問題があった。Like this: 1. When the steel flows through the immersion pipe, the refractory brick layer undergoes thermal expansion due to the high temperature, and the immersion pipe has little or no bottom lining, which causes stress. Generates heavy loading on the firebrick layer. When this crack occurs, the layer of refractory brick peels off;1. or
There was a problem in that wear and tear was accelerated by the penetration of the 8-step slag into the cracks.

そこで、１耐火レンガ間の目地モルタルを厚くし、耐火
レンガｊ書の熱膨張をモルタルで吸収させることも考え
られるが、目地が厚くなるにつれて目地（３損が著しく
なる。Therefore, it may be possible to thicken the mortar at the joints between each refractory brick and allow the mortar to absorb the thermal expansion of the refractory bricks, but as the joints become thicker, the joint loss (3) becomes more significant.

また、浸漬管の外Ｊ、１を段う不定形耐火物（ｄ１気孔
率が高いことで、ある程度の断熱性を示すが、内周の１
ｉｉＪ火レンガ層は緻密質で熱仏心率が高く、しかも溶
≦１１流Ｕてより」：ｉｉ；此が遅いため、金ｊ（Ａ裂
円筒が内周からの浴鋼熱で炊化変形しやすい。円筒と！
耐火レンガ７ｉうとの間にも不定形耐火物を充填させて
いるが、厚さがｆＪいために断熱性が殆ど得られない。In addition, the monolithic refractories lining the outside of the immersion pipe (d1 have a high porosity and exhibit a certain degree of heat insulation, but the inner periphery
ii: The J fire brick layer is dense and has a high thermal core rate, and the melting rate is ≦11. Easy. With a cylinder!
A monolithic refractory material is also filled between the refractory bricks 7i, but since the thickness is fJ, almost no heat insulation is obtained.

円筒が軟化変形すると１１別人レンがＪＶ；　、不定形
耐火物層の保持能力が失われるので、耐火レンガ層の溶
損残存寸法に余裕を持った状態で浸漬管を交換しなけれ
ばならず、−その分、浸漬管の寿命を低下爆せていた。When the cylinder softens and deforms, the holding capacity of the monolithic refractory layer is lost, so the immersion pipe must be replaced with a margin for the remaining dimension of the refractory brick layer due to erosion. -The life of the immersion tube was reduced accordingly.

本発明は、円筒と耐火レンが層との間に可縮材を添加し
た不定形ｉｉＨ人物を充填することによシ、耐火レンが
層の重要発生を防止することによって）浸漬管の寿命延
長を図るものでちる・ 第１図および第２図に示すように、円筒（２）と面Ｊ火
しンガ層（５）との間（佳その空隙部を埋めるためと、
迫りによって耐火レンガ）け（５）を固定するために、
従来からも不定形耐火物（６）が充填されている。しか
し、この不定形耐火物（６）の従来の材質は、円筒の外
周を覆う不定形０１１人物と伺んら変わりなく、アルミ
ナ質、マグネシア質。The present invention extends the service life of the immersion tube by filling an amorphous IIH figure with a shrinkable material between the cylinder and the refractory layer (by preventing the refractory layer from forming). As shown in Figures 1 and 2, there is a gap between the cylinder (2) and the surface J Fire Shinga layer (5) (to fill the gap,
In order to fix the refractory bricks (5) by pressing,
Conventionally, monolithic refractories (6) have been filled. However, the conventional materials for this monolithic refractory (6) are alumina and magnesia, which are the same as the monolithic 011 person that covers the outer periphery of the cylinder.

マグクロ＠などの中性、塩基性のは火原料から選ばれた
１イ・１［廿たば２イ一１以上を骨オ」“とじ、とルに
結谷剤２分散剤方とを添加して々るもので、耐火レンガ
層の熱膨張吸収能力が殆どない。Neutral and basic materials such as Maguro @ are selected from fire raw materials. As a result, the refractory brick layer has almost no ability to absorb thermal expansion.

これに対し、本殆明は町オ名材を添加した不定形耐火物 て耐火レンが層のハ膨弧を吸収することが出来る。On the other hand, Honshamei is a monolithic refractory made of Machio materials. The refractory brick can absorb the expansion arc of the layer.

回忌１材の具体例としては、例えば常温で可縮性を示す
発泡ｊＶＪ　Ｅｔ　、任用時の高温で焼失または解融で
可λ″、名性を示す（′、ｊ脂、おがｊ１３、ファイ・
ぐ−類などが使用できる。Specific examples of 1st anniversary materials include foamed materials that are compressible at room temperature, λ'' that can be burnt out or melted at high temperatures during use, and materials that are famous (', j fat, saw j13, fiber).・
Gu-type etc. can be used.

第３図および第５図（は、可縮材の好ましい添加割合を
求めるための実験結果であり、第３図は電ＩＪ！マグク
ロ質キャスタブルに可縮材としておがＪ’ｔ’Ａを添加
した場合の、不定形耐火物の収縮率変化を示す。Figures 3 and 5 (show the results of an experiment to determine the preferred addition ratio of shrinkable material. Figure 3 shows the addition of saw J't'A to electric IJ! maguro castable as a shrinkable material. This shows the change in shrinkage rate of monolithic refractories when

第４（図は不定形耐火物の収縮率を測定する方法であり
、１ｎ１１火レンガからなる容器（ｓ）ｉ入れた不定形
耐火物（９）に２５〜３０　ｋｇ／ｍ２ノ荷重を掛けた
状態で電気炉に入れ、６ｏｏ′ｃまたは１１００℃の湿
度で２時間加熱後、下式にょシ求めた。The fourth figure shows a method for measuring the shrinkage rate of monolithic refractories, in which a load of 25 to 30 kg/m2 was applied to the monolithic refractory (9) placed in a container (s)i made of 1n11 fire bricks. The sample was placed in an electric furnace and heated for 2 hours at a humidity of 6oo'c or 1100°C, and then the temperature was determined using the following formula.

第５図は、前記収縮率を測定した場合と同様のキャスタ
グル耐火物を用い、４０×４０×１６０ｍの試験片を作
成し、曲げ強さを６１（］定した結果である。FIG. 5 shows the results of making a test piece of 40 x 40 x 160 m using the same Castagle refractory as in the case of measuring the shrinkage rate, and determining the bending strength of 61 (].

第３図、第４図の結果から、可縮材が増すと収Ａ；率が
向上するが、それに伴って強度が低下し、迫りによる耐
火レンが層を保持する能力が失われるので、添加量は夕
＋１１１６０容量多以下にしなければならない。さらに
好ましくは収縮率の大きい外４１１１ｏ〜５０容１寸裂
である。これによって、円筒と面］火しンガ層との僅か
な間隙においても、所要の断熱性が沿られ、金属製円筒
の軟化変形を有効に防止できる。From the results shown in Figures 3 and 4, as the amount of shrinkable material increases, the A; The amount must be less than +11160 capacity. More preferably, it has a large shrinkage rate and has a size of 4111 to 50 volumes. As a result, even in a small gap between the cylinder and the surface fire-shining layer, the required heat insulation properties can be maintained, and softening and deformation of the metal cylinder can be effectively prevented.

以上の不定形耐火ｌ吻を円筒と耐火レンガ層との間に充
填する方法は、流し込み、スタンプムど従来の浸漬管の
製造法と何んら変わり（はない。The method of filling the space between the cylinder and the refractory brick layer with the above-described monolithic refractory nozzle is no different from conventional methods of manufacturing immersion pipes, such as pouring and stamping.

実施例１ 耐火レンガ層を周方向に２０分！Ｌ上下方向に３分割（
でシたマダネシアークロム質レンガとし、外周の不定形
耐火物層をアル゛ミナ質キャスタブル剛大物でｔ１１′
５ｒＪｙ、シた浸漬管において、芯金と耐火レンガ層と
の間、３０丁罰に下記の塩基性不定形耐火物を充填した
。Example 1 20 minutes in the circumferential direction of the refractory brick layer! L divided into three vertically (
Made of Madanesia chromium bricks, the outer periphery of the monolithic refractory layer is made of rigid and large aluminum castable material.
The following basic monolithic refractory was filled to a depth of 30 tons between the core bar and the firebrick layer in a 5rJy immersion tube.

電口ｉマグクロクリンカー　１０〜１咽　　　　　５０
重量襲／／ＩＴｍ以下　　　　５０重重量 へキザメタリン酸ソーダ　　　　　　外掛　　　５　ｉ
Ｊ＠、　％おが屑（可縮材）　　２加以下外掛　　１０
容量係実施例 芯金と側火レンガ層との間に、下記の不定形耐火物を充
填した池は、実施例１と同様の条件にした。Electric mouth i mag black clinker 10~1 throat 50
Weight attack // ITm or less 50 weight Sodium metaphosphate Sodium 5 i
J@, % sawdust (shrinkable material) 2K or less outer hanging 10
Capacity Example A pond filled with the following monolithic refractory between the core metal and the side fire brick layer was subjected to the same conditions as in Example 1.

アルミナ　　　　　　　　　　　　　　　９０重景多ア
ルミナセメント１０　重量％ 発泡スチロール惇１脂　　３０以下　外掛　　１０容量
係以上の実１・３例１および実施例２の浸漬管は、実機
テストにおいて而」火しンが層の足袋、円筒の損傷とも
少なく、いずれも１５０〜２００回の使用に耐えた。Alumina 90 heavy weight alumina cement 10% by weight Styrofoam resin 1 fat 30 or less Outer hook 10 The soaking tubes of Examples 1 and 3 and Example 2 with a capacity of 10 or more were tested in actual machines. There was little damage to the cylinders, and all of them withstood 150 to 200 uses.

一方、円筒と耐火しンが層との間に充填する不定形耐火
物に可縮材を添加せず、曲は上記天舵例と同様の条件で
借成した浸漬管について実機テストを行なったところ、
１ｆＪＪ火レンが層の亀裂発生が著しく、円１１；ｉの
損傷が早い時期に生じ、１討用回数は８０回と短いもの
であった。On the other hand, without adding any shrinkable material to the monolithic refractory filled between the cylinder and the layer of refractory shingles, an actual machine test was conducted on a borrowed immersion pipe under the same conditions as the above-mentioned example. However,
The cracks in the layer of the 1f JJ fire lens were significant, and the damage to circle 11;i occurred at an early stage, and the number of times it was used was as short as 80 times.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は浸ｊ責管の断面図、第２図は第１図Ａ−Ａ腺断
面図、第３図は不定形耐火物において可縮材の添加と、
収量率の１１］係を示すグラフ、第４図は不定形耐火物
の収縮率測定方法を示し、第５図は不定形耐火物におい
て可縮材の添加と、曲げ強芒の関係を測定したグラフで
ある。 １：７ランジ、　　　　　２：金属製円筒、３：スタン
ド、　　　　　４：不定形耐火物層、５：耐火レンが層
、　　　６：不定形耐火物）７：受金、 ８：耐火レンがよりなる容器、 ９：不定形耐火物。 ＜−ｒｓ　　　１　　　ト−４１ ；、、＃ｊ　　２　１、．１ 第３１１ ｌ ＯノＯノｏ　　　　３ｏ　　　　Ｊｉｏ　　　　ｓｏ　
　　　乙Ｏ可権才才のシトカロ♂１１イ〒（８１％）部
４図Fig. 1 is a cross-sectional view of the immersion pipe, Fig. 2 is a cross-sectional view of the A-A gland in Fig. 1, and Fig. 3 is the addition of shrinkable material in monolithic refractories.
Figure 4 shows the method for measuring the shrinkage rate of monolithic refractories, and Figure 5 shows the relationship between the addition of shrinkable material and bending stiffness in monolithic refractories. It is a graph. 1: 7 lunge, 2: metal cylinder, 3: stand, 4: monolithic refractory layer, 5: refractory brick layer, 6: monolithic refractory) 7: receiver, 8: container made of refractory brick , 9: Monolithic refractory. <-rs 1 to-41 ;,, #j 2 1, . 1 311 l OノOノo 3o Jio so
Otsu O talented and talented Sitkaro ♂ 11 I〒(81%) Part 4 figure

Claims (1)

【特許請求の範囲】 １　金属製円筒の内周を口火レンガ層、外周を不定形耐
火物層でｔ′・−成した真空脱ガス装置用浸漬管におい
て、前記円筒と耐火レンガ層との間に、可縮材を添加し
た不定形耐火物を充填してなる真空脱ガス装置用浸漬管
。 ２　可縮材の添加量が外掛６０容賛チ以下へで１１ある
特許請求の範囲第１項記載の真空脱がス装置巨・−用浸
漬管。[Scope of Claims] 1. In an immersion tube for a vacuum degassing device, the inner periphery of a metal cylinder is formed by a refractory brick layer, and the outer periphery is formed by an amorphous refractory layer, in which a space between the cylinder and the refractory brick layer is provided. An immersion tube for a vacuum degassing device, which is filled with a monolithic refractory to which a shrinkable material is added. 2. The immersion tube for a large vacuum degassing device according to claim 1, wherein the amount of the shrinkable material added is 11 to 60 cm or less.