JPH0426434Y2 - - Google Patents
Info
- Publication number
- JPH0426434Y2 JPH0426434Y2 JP13974387U JP13974387U JPH0426434Y2 JP H0426434 Y2 JPH0426434 Y2 JP H0426434Y2 JP 13974387 U JP13974387 U JP 13974387U JP 13974387 U JP13974387 U JP 13974387U JP H0426434 Y2 JPH0426434 Y2 JP H0426434Y2
- Authority
- JP
- Japan
- Prior art keywords
- lance
- refractory
- cylindrical body
- tip
- processing
- 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
- 239000003795 chemical substances by application Substances 0.000 claims description 15
- 239000002184 metal Substances 0.000 claims description 8
- 229910052751 metal Inorganic materials 0.000 claims description 8
- 239000011819 refractory material Substances 0.000 claims description 6
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical compound [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 claims description 4
- 239000003575 carbonaceous material Substances 0.000 claims description 4
- 230000007797 corrosion Effects 0.000 claims description 3
- 238000005260 corrosion Methods 0.000 claims description 3
- 238000004901 spalling Methods 0.000 claims description 3
- 230000008018 melting Effects 0.000 claims 1
- 238000002844 melting Methods 0.000 claims 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 8
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- 239000012159 carrier gas Substances 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 4
- 238000006477 desulfuration reaction Methods 0.000 description 3
- 230000023556 desulfurization Effects 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000013019 agitation Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000007664 blowing Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 210000002445 nipple Anatomy 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
Landscapes
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Description
産業上の利用分野
本考案は、製鉄所における脱硫、脱珪等の溶銑
処理装置のガス、処理剤吹込み用の先端耐火物保
護の溶融金属処理用ランスに関する。
従来の技術
従来、製鉄所の溶銑処理装置のガス、処理剤を
吹き込むランス１は、第２図のように所定の長さ
の鉄製の供給パイプ２に耐火キヤスタブル３をラ
イニングして被覆して形成しているものであつ
た。
しかし、近年操業条件が過酷となるにしたが
い、ランスの先端部の損耗が激しく、寿命が大幅
に低下するものであつた。
考案が解決しようとする問題点
ランスの損耗の原因を調べた結果、以前には脱
硫用処理剤を吹き込むキヤリヤガスとして窒素を
使用していたが、最近では処理中の温度低下を防
ぎ、温度補償をはかるためにキヤリヤガスとして
空気を使用していることが分かった。そのため、
ランスの鉄製の供給パイプの先端が急激に酸化損
耗し、ランスの寿命が低下しているものであつ
た。
問題点を解決するための手段
本考案は上記のような点に鑑みたもので、上記
の問題点を解決するために、溶融金属処理のラン
スのガス、処理剤吹き出しの先端部に耐火材の耐
火筒状体を装着するとともに、耐火筒状体の内径
をランス本体部の供給パイプの内径と同一または
それより小さく形成したことを特徴とする先端耐
火物保護の溶融金属処理用ランスを提供するにあ
る。
作 用
本考案によれば、ランスの先端部に装着の耐火
材の耐火筒状体で先端部の酸化損耗を防止でき
る。また、その耐火筒状体の内径をランス本体部
の内径と同一または小さくしていることによつ
て、吐出口部で流速が低下するのを防止でき、先
端部に処理剤を詰まらせず、処理剤の攪拌効率を
高められる。
実施例
以下、本考案を実施例にもとづいて説明する。
第１図は、本考案の一実施例である。ランス１
は、第１図のように所定の長さの筒状に形成して
いて、処理剤および空気を吹き出し自在とした所
定径の鉄製の供給パイプ２の先端部に耐火材の耐
火筒状体４を装着し、これらの外側に耐火キヤス
タブル３をライニングして被覆して形成してい
る。耐火筒状体４は、図のように異径ニツプル状
に後部側よりも前部側を小さい内径とし、内径の
大きい後部側を供給パイプ２の先端部に嵌装して
いる。その前部側の吐出口５は、供給パイプ２の
内径と同一またはやや小さくしていて、ランス１
の先端部の吐出口５で処理剤や空気の流速を低下
することなく、吹き出せるようにしている。耐火
筒状体４にはアルミナ−カーボン系材質を使用し
ていて、熱伝導性に優れ、耐スポーリング性、耐
蝕性を良好にして耐久性を高めているものであ
る。
しかして、第２図のような供給パイプ２をSS
材とSUS309材とでそれぞれ形成した従来例１，
２と本考案の実施例の気孔率6.0％、かさ比重
2.95のアルミナ−カーボン系材質の耐火筒状体４
を装着したものとを使用した結果は、次表の通り
である。
INDUSTRIAL APPLICATION FIELD The present invention relates to a molten metal processing lance that protects tipped refractories for injecting gas and processing agents into hot metal processing equipment such as desulfurization and desiliconization in steel plants. Conventional technology Conventionally, a lance 1 for blowing gas and processing agent into a hot metal processing equipment in a steelworks is formed by lining and covering an iron supply pipe 2 of a predetermined length with a refractory castable 3, as shown in Fig. 2. It was something I was doing. However, as operating conditions have become more severe in recent years, the tip of the lance has been subject to severe wear and tear, significantly shortening its lifespan. Problems that the invention aims to solve After investigating the cause of lance wear and tear, we found that in the past, nitrogen was used as a carrier gas to blow in the desulfurization treatment agent, but recently nitrogen has been used as a carrier gas to blow the desulfurization treatment agent, but recently nitrogen has been used to prevent temperature drops during treatment and to It turns out that air is used as a carrier gas for measurement. Therefore,
The tip of the iron supply pipe of the lance was rapidly oxidized and worn out, reducing the lifespan of the lance. Means for Solving the Problems The present invention was developed in view of the above-mentioned problems.In order to solve the above-mentioned problems, a refractory material is installed at the tip of the gas and processing agent blowout of the lance for molten metal processing. To provide a lance for molten metal processing with tip refractory protection, characterized in that a refractory cylindrical body is attached and the inner diameter of the refractory cylindrical body is formed to be the same as or smaller than the inner diameter of a supply pipe of a lance main body. It is in. Effects According to the present invention, the refractory cylindrical body made of refractory material attached to the tip of the lance can prevent oxidation damage to the tip. In addition, by making the inner diameter of the refractory cylindrical body the same as or smaller than the inner diameter of the lance main body, it is possible to prevent the flow velocity from decreasing at the discharge port, and prevent the processing agent from clogging the tip. The stirring efficiency of processing agents can be increased. Examples The present invention will be described below based on examples. FIG. 1 shows an embodiment of the present invention. Lance 1
As shown in FIG. 1, a refractory cylindrical body 4 made of a refractory material is attached to the tip of an iron supply pipe 2 of a predetermined diameter, which is formed into a cylindrical shape with a predetermined length and can freely blow out processing agent and air. are attached, and the outside of these is lined and covered with a fireproof castable 3. As shown in the figure, the refractory cylindrical body 4 is shaped like a nipple with different diameters, and has a smaller inner diameter on the front side than on the rear side, and the rear side, which has a larger inner diameter, is fitted into the tip of the supply pipe 2. The discharge port 5 on the front side is the same as or slightly smaller than the inner diameter of the supply pipe 2, and the lance 1
The processing agent and air can be blown out from the discharge port 5 at the tip of the processing agent without reducing the flow velocity of the processing agent or air. The refractory cylindrical body 4 is made of alumina-carbon material, which has excellent thermal conductivity, good spalling resistance and corrosion resistance, and enhances durability. Therefore, connect the supply pipe 2 as shown in Figure 2 to the SS
Conventional example 1 made of steel and SUS309 material, respectively.
2 and porosity of 6.0% and bulk specific gravity of the embodiment of the present invention
2.95 alumina-carbon material fireproof cylindrical body 4
The results using the one equipped with and the one equipped with are shown in the following table.
【表】
表のように、従来のものでは先端が損耗して２
回しか使用できなかつたが、本実施例のものでは
先端が損傷せずに５回使用後にランスの中央部の
耐火キヤスタブルが溶損し、鉄製の供給パイプが
わん曲して使用不可能となつた。このように本実
施例のものでは、従来のものに比して2.5倍の寿
命を延長でき、処理剤の攪拌効率も良好であつ
た。
上記実施例では、耐火筒状体として、熱伝導性
に優れ、耐スポーリング、耐蝕性に優れたアルミ
ナ−カーボン系材質を使用したが、他の耐火材で
形成しても相当の耐久性が高められるものであ
る。また、耐火筒状体の前部の吐出口部を一様径
の開口状態としたが、ベンチユリーノズル状等に
形成して吹き出し流体をできるだけ摩擦損失少な
く吹き出すようにすることもできるものである。
考案の効果
以上のように本考案にあつては、キヤリヤガス
として空気を使用しても、耐火筒状体でランスの
先端部が酸化損耗するのを防止することができ、
ランスの耐久性を高められて材料原単価の格段の
低減をはかることができる。また、先端部をラン
ス本体の内径より大きくしていないので、吐出口
部で流速が低下せず、処理剤が吐出口部で詰まら
ずに処理剤の攪拌効率を良好にできる。[Table] As shown in the table, the tip of the conventional one was worn out and
However, in this example, the tip of the lance was not damaged, but after five uses, the refractory castable in the center of the lance melted and the iron supply pipe became bent, making it unusable. . As described above, the product of this example was able to extend the service life by 2.5 times compared to the conventional product, and the agitation efficiency of the processing agent was also good. In the above example, an alumina-carbon material with excellent thermal conductivity, spalling resistance, and corrosion resistance was used for the refractory cylindrical body, but even if it is made of other refractory materials, it will have considerable durability. It can be enhanced. In addition, although the discharge port at the front of the refractory cylindrical body is made to have an opening with a uniform diameter, it can also be formed in the shape of a ventilate nozzle to blow out the fluid with as little friction loss as possible. . Effects of the invention As described above, with the present invention, even if air is used as the carrier gas, the tip of the lance can be prevented from being oxidized and worn out by the refractory cylindrical body.
The durability of the lance is increased and the unit cost of materials can be significantly reduced. Furthermore, since the tip is not made larger than the inner diameter of the lance body, the flow rate does not decrease at the discharge port, and the processing agent does not clog the discharge port, making it possible to improve the agitation efficiency of the processing agent.
第１図は本考案の一実施例の一部省略した側断
面図、第２図は同上の従来例の一部省略した側断
面図である。
１……ランス、２……供給パイプ、４……耐火
筒状体、５……吐出口。
FIG. 1 is a partially omitted side sectional view of an embodiment of the present invention, and FIG. 2 is a partially omitted side sectional view of the conventional example. 1... Lance, 2... Supply pipe, 4... Fireproof cylindrical body, 5... Discharge port.
Claims (1)
しの先端部に耐火材の耐火筒状体を装着すると
ともに、耐火筒状体の内径をランス本体部の供
給パイプの内径と同一またはそれより小さく形
成したことを特徴とする先端耐火物保護の溶融
金属処理用ランス。 (2) 耐火筒状体を、熱伝導性が優れ、耐スポーリ
ング性、耐蝕性に優れたアルミナ−カーボン系
材質で形成した実用新案登録請求の範囲第１項
記載の先端耐火物保護の溶融金属処理用ラン
ス。[Scope of Claim for Utility Model Registration] (1) A refractory cylindrical body made of refractory material is attached to the tip of the gas and processing agent blowout of a lance for molten metal processing, and the inner diameter of the refractory cylindrical body is supplied to the main body of the lance. A lance for processing molten metal with a tip refractory protected, characterized by having a diameter that is the same as or smaller than the inner diameter of the pipe. (2) The melting of the advanced refractory protection according to claim 1, in which the refractory cylindrical body is formed of an alumina-carbon material with excellent thermal conductivity, spalling resistance, and corrosion resistance. Lance for metal processing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13974387U JPH0426434Y2 (en) | 1987-09-11 | 1987-09-11 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13974387U JPH0426434Y2 (en) | 1987-09-11 | 1987-09-11 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6445750U JPS6445750U (en) | 1989-03-20 |
| JPH0426434Y2 true JPH0426434Y2 (en) | 1992-06-25 |
Family
ID=31403287
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13974387U Expired JPH0426434Y2 (en) | 1987-09-11 | 1987-09-11 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0426434Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7727326B1 (en) * | 2004-02-13 | 2010-06-01 | Trangsrud Julian P | Varied length fibers in a brittle material |
-
1987
- 1987-09-11 JP JP13974387U patent/JPH0426434Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6445750U (en) | 1989-03-20 |
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