JPS58167717A - Nozzle for refining molten metal - Google Patents
Nozzle for refining molten metalInfo
- Publication number
- JPS58167717A JPS58167717A JP5055182A JP5055182A JPS58167717A JP S58167717 A JPS58167717 A JP S58167717A JP 5055182 A JP5055182 A JP 5055182A JP 5055182 A JP5055182 A JP 5055182A JP S58167717 A JPS58167717 A JP S58167717A
- Authority
- JP
- Japan
- Prior art keywords
- nozzle
- refractory
- molten metal
- holes
- metal
- 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.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D1/00—Treatment of fused masses in the ladle or the supply runners before casting
- B22D1/002—Treatment with gases
- B22D1/005—Injection assemblies therefor
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/42—Constructional features of converters
- C21C5/46—Details or accessories
- C21C5/48—Bottoms or tuyéres of converters
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は、溶融金属精錬炉の炉底等に設置されことから
ガスを吹き込む丸めの溶融金属精錬用ノズルに関するも
のであって、その目的とするとζろは、諒精錬用ノズル
のガス吹込みの際の流量制御範囲を大きくすると共に１
併せてノズル自体の耐用寿命を弧長させるととにある。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a round molten metal refining nozzle that is installed at the bottom of a molten metal smelting furnace and blows gas into it. In addition to increasing the flow rate control range when blowing gas with the nozzle for
At the same time, the useful life of the nozzle itself is extended.
従来、溶融金属の精錬処理、脱ガス、攪拌などを目的と
して、溶融金属容器の主として底部にガス吹込みのため
の耐火物製ノズルを設け、これよ抄溶融金属中に各種の
ガスを吹込むことが行われていることは周知である。又
、最近で社転炉などの精錬炉においても、耐火物からな
るガス吹込用ノズルを用いて底部からガスを吹込むこと
が行われており、このためのノズルに関して本発明者ら
のグループは先に特願昭５６−８４３２１号及び実願昭
５６−１２５９５０号をもって提案をし九。Conventionally, for the purpose of refining molten metal, degassing, stirring, etc., a refractory nozzle for blowing gas was installed mainly at the bottom of a molten metal container, and various gases were blown into the molten metal. It is well known that this is happening. Recently, gas has also been injected from the bottom of refining furnaces such as converters using refractory gas injection nozzles. I first made a proposal with Japanese Patent Application No. 56-84321 and Utility Application No. 56-125950.
しかしながら、上記の提案のノズルにもその後検討を重
ね九結果、次の問題があることが判明した。However, as a result of repeated studies, it has been found that the nozzle proposed above has the following problems.
（１） 多数の貫通孔を有するガス吹込用耐大物にお
いて、貫通孔の間隔が小さくなった場合ノズル耐火物の
溶損が大となる。(1) In a large gas blowing resistant material having a large number of through holes, if the interval between the through holes becomes small, the nozzle refractory material will suffer from erosion.
（１１） 同上のガス吹込用耐大物の貫通孔を耐火物
中に埋設し丸鋼管によ抄構成する場合、鋼管の肉厚が薄
いと耐火物製造時に潰れるし、厚いと使用時の溶損が大
きい。(11) When the through-holes of the above-mentioned large resistant material for gas injection are buried in the refractory and made of round steel pipes, if the wall thickness of the steel pipe is thin, it will collapse during the manufacture of the refractory, and if it is thick, it will melt during use. is large.
ＧｉＤ 同上のガス吹込用耐大物の下部に圧力箱を設
けた装置において、圧力箱を形成している上部鉄板と下
部鉄板の間隔が小さ過ぎると、吹込ガスの流れが悪く、
圧損が大きくなる。GiD In a device with a pressure box installed at the bottom of a large object for blowing gas, if the distance between the upper and lower iron plates forming the pressure box is too small, the flow of the blowing gas will be poor.
Pressure loss increases.
位−同上のガス吹込用耐火物の側面を囲む金属製カバー
ノ厚さが適当でないとノズルノ耐用轡命製作費に影響を
与える。- If the thickness of the metal cover surrounding the side surface of the gas injection refractory is not appropriate, the lifetime of the nozzle and the manufacturing cost will be affected.
Ｍ 同上のガス吹込用耐大物の化学組成カニ適当でない
と溶鋼、スラグの浸透が大とな抄、又熱的本発明は、こ
のようなガス吹込の丸めの溶融金属精錬用ノズルにおけ
る未解決の問題を解決する丸め罠なされたものであって
、上記のそれぞれの問題に対応する対策を講じたもので
ある。If the chemical composition of the large-sized material for gas injection is not appropriate, the penetration of molten steel and slag will be large. This is a round-trip solution to the problem, and measures have been taken to address each of the above problems.
本発明の要旨とするところは、使用面から背部に至る複
数の貫通孔を有する耐火物と、該耐火物の側面を囲む金
属製カバーと、前記耐火物の底部に設けられていて前記
貫通孔と連通しかつガス溜め空間を形成する圧力箱と、
よ如なる溶融金属精錬用ノズルなるものである。The gist of the present invention is to provide a refractory having a plurality of through holes extending from the use surface to the back, a metal cover surrounding the side surface of the refractory, and a metal cover provided at the bottom of the refractory and having the through holes. a pressure box that communicates with the gas tank and forms a gas reservoir space;
This is a nozzle for refining molten metal.
本発明のさらに一つの特徴は、前記耐火物の複数の貫通
孔の間隔を５ｍ以上１５０■以下としであることである
。Another feature of the present invention is that the intervals between the plurality of through holes in the refractory are 5 m or more and 150 cm or less.
本発明のさらに一つの特徴は、前記耐火物の複数の貫通
孔が耐火物中に埋設された金属管よりなり、咳金属管の
肉厚が０．１■以上１ｏ■以下とし 。Still another feature of the present invention is that the plurality of through holes in the refractory are made of metal tubes embedded in the refractory, and the wall thickness of the metal tube is 0.1 to 10 mm.
であることである。It is to be.
本発明のさらに一つの特徴は、前記金属製カバーが厚さ
０．１−以上５−以下の鉄板よ妙なっていることである
。Another feature of the present invention is that the metal cover is made of an iron plate with a thickness of 0.1 to 5.
本発明のさらに一つの特徴は、前記圧力箱のガス溜め空
間を形成する上部金属板と下部金属板との間隔を２Ｗ以
上５０−以下としであることである。Another feature of the present invention is that the distance between the upper metal plate and the lower metal plate forming the gas reservoir space of the pressure box is 2W or more and 50- or less.
次に、本発明による溶融金属精錬用ノズルについて図に
基づいて説明する。第１図は本発明の溶融金属精錬用ノ
ズルを溶融金属容器の底部へ設置した一例を示す縦断面
図であり、第２図はその溶融金属精錬用ノズルの平面図
である０図に示す符号（１）は非多孔質煉瓦からなる耐
火物である。この耐火物（１）には、使用面即ち溶融金
属容器に設置した場合容器の内側で溶融金属に直接接触
する方の面から、背面即ち該耐火物の容器外面に至る複
数の貫通孔（２が略直線上に貫通する如く穿たれている
。（６）は金属製カバーであって、前記耐火物（１）の
馬面の一部又は全部を囲む構造になっている。こり金属
製カバー（３）の下端部は前記耐火物（１）の下端より
延びて、□上部金属板（５） 、下部金属板（６）とに
囲筐１九ガス溜め空間を形成している。なお、前配上郁
金−板（５には複数の貫通孔（２の夫々と接する個所毎
に連通孔が穿たれており、ガス吹込みに支障がないよう
にしである。（７）はガス送入管であって、とζから前
記圧力箱（４）を介して溶融金属１！−内へガス吹込み
が行われるようになっている。■は外巻きスリーブであ
って、溶融金属容器のセット煉瓦（９）及び鉄皮（１０
） Ｋ溶融金属精錬用ノズルを固定する丸めに設けられ
ている。尚、この外巻きスリーブ社運搬途中等における
くづれ郷を肪ぐためのもので必須ではない。Next, a molten metal refining nozzle according to the present invention will be explained based on the drawings. FIG. 1 is a longitudinal cross-sectional view showing an example of the molten metal refining nozzle of the present invention installed at the bottom of a molten metal container, and FIG. 2 is a plan view of the molten metal refining nozzle with the symbols shown in FIG. (1) is a refractory made of non-porous bricks. This refractory (1) has a plurality of through holes (2 (6) is a metal cover, which has a structure that surrounds part or all of the horse face of the refractory (1). 3) The lower end extends from the lower end of the refractory (1) and forms a gas reservoir space in the enclosure with the upper metal plate (5) and the lower metal plate (6). The upper metal plate (5) has a plurality of through holes (a communication hole is bored at each point where it contacts each of the parts 2, so that there is no problem with gas injection. (7) is a gas supply hole. The pipe is such that gas is blown into the molten metal 1!- from the pressure box (4) through the pressure box (4). Bricks (9) and iron skins (10
) K is provided in a round shape to fix the molten metal refining nozzle. It should be noted that this outer sleeve is not essential, as it is intended to save space during transportation.
しかして、本発明の溶融金属精錬用ノズルは以上説明し
九通りの構成になるものであるが、本発明の目的を遠戚
するため更に次の構成を採用することが必要である。Although the molten metal refining nozzle of the present invention has nine configurations as described above, it is necessary to further adopt the following configuration in order to remotely achieve the object of the present invention.
その一つは、前記耐火物（１）に設けられている貫通孔
（２の間隔を５ｍ以上１５０ｍ以下とすることである。One of them is to set the interval between the through holes (2) provided in the refractory (1) to be 5 m or more and 150 m or less.
斯くすることにより、従来のノズル耐火物における如き
貫通孔の間隔が小さい場合問題であったノズル耐火物の
溶損を大幅に低下させ得る。このときの間隔を５ｍｍ以
上１５〇−以下とじ九理由は、３■未満では前述の効果
が得られず、１５０−を超えると耐火物（１）の面積に
対し貫通孔（２の占める面積が少〈な抄過ぎ、従ってガ
ス吹込量が少くなり流量制御範囲が小さくなるからであ
る。By doing so, it is possible to significantly reduce the erosion of the nozzle refractory, which was a problem when the distance between the through holes was small as in conventional nozzle refractories. The reason for this is that the above-mentioned effect cannot be obtained if the spacing is 5 mm or more and 150 mm or less, and if it exceeds 150 mm, the area occupied by the through hole (2) is smaller than the area of the refractory (1). This is because if the paper is too small, the amount of gas blown will be reduced, and the flow rate control range will be narrowed.
次の一つは、前記耐火物（１）の複数の貫通孔（２が耐
火物（１）中に埋設された金属管よ抄なる場合の、該金
属管の肉厚を０．１−以上１０■以下とすることである
。The next one is that when the plurality of through holes (2) of the refractory (1) are made of metal tubes embedded in the refractory (1), the wall thickness of the metal tube should be 0.1- or more. It should be 10■ or less.
斯くすることによ抄、前記金属管の肉厚力監０．１−未
満と薄過ぎる場合にしばしば発生する耐火物製造時の潰
れがなくな抄、又内厚が１０−を超えて厚過ぎる場合の
溶損が該金属管が埋設されていることにより早くなるこ
とを防止する。By doing this, the crushing that often occurs during the manufacture of refractories, which often occurs when the wall thickness of the metal tube is too thin (less than 0.1 mm), is eliminated, and the inner thickness is too thick (more than 10 mm). To prevent corrosion damage from accelerating due to the metal pipe being buried.
次の一つは、舘記金属製カッ（−＜５）の厚さを０．１
−以上５−以下の鉄板をもって構成するものである。The next one is to reduce the thickness of Tateki metal cup (-<5) to 0.1
It is composed of iron plates of -5 to -5.
斯くすることにより、金属製°□カッ＜ −（５）に本
来要求される耐火物中の貫通孔Ｑ）以外の側面からのガ
ス洩出を防止し、吹込、ガスの圧損を防止すること寿命
を得るために適当袋材料鉄板の厚さの下限を０．１−と
し、又ノズル製作費のコストアップを避ける丸めその上
限を５−とすることが必要である。By doing this, it is possible to prevent gas from leaking from the sides other than the through hole Q) in the refractory, which is originally required for metal pipes (5), and to prevent blowing and gas pressure loss. In order to obtain a suitable bag material, the lower limit of the thickness of the iron plate should be set to 0.1-, and the upper limit of rounding should be set to 5- to avoid an increase in the nozzle manufacturing cost.
次の一つは、前記圧力箱４）のガス溜め空間を形成して
いる上部金属板６）と下部金属板（６）との間隔を２−
以上５０■以下とするものである。The next method is to increase the distance between the upper metal plate 6) and the lower metal plate (6) forming the gas reservoir space of the pressure box 4) by 2-
The above shall be 50■ or less.
斯くすることにより、従来問題とされていえ上。By doing so, it is no longer considered a problem in the past.
下金属板間の間隔が小さ過ぎるごとによる吹込ガスの流
れが悪いばか抄でカく流量制御特性が小さく圧損、が大
きくなることを避けるために必要な間隔の下限は２■と
じ、又ノズルをコンパタトにするためその上限を５０１
１ｍとする必要がある。The lower limit of the required spacing is 2■ in order to avoid poor flow of blown gas due to the spacing between the lower metal plates being too small, resulting in poor flow rate control characteristics and large pressure drop. In order to make it compatible, the upper limit is set to 501.
It needs to be 1m.
斯くすることにより、従来のガス吹込用耐大物の化学成
分が適当でなかったことによるスラグ浸透が大きいこと
、熱的スポーリングによる損傷が大であること等の問題
がなくなる。しかして、前記化学成分の中Ｃの下限を５
チとしたのは、これ未満では溶鋼、スラグの浸透が大と
なり、耐火物の溶損が大きいからであり、又その上限を
３０優としたのは、これを超えると耐火物の強度及び耐
貴性が劣化するからである。By doing so, problems such as large slag penetration and large damage due to thermal spalling caused by unsuitable chemical composition of conventional large-sized materials for gas injection are eliminated. Therefore, the lower limit of C among the chemical components is 5
The reason why the upper limit was set at 30 is because if it is less than this, the penetration of molten steel and slag will be large, and the refractory will be damaged by erosion. This is because the nobility deteriorates.
次に示す第１表は本発明の溶融金属精錬用ノズルを転炉
における複合吹錬（上吹及び下吹）Ｋ６４１ｏｈ用い九
場合の実施例を示す。第１表よ抄明らかなように、上吹
きのみの吹錬よりも歩留りが０、５９１１向上し、合金
鉄についても効果が得られている。その他の効果として
も吹錬時間の短縮、出鋼ＩＬ＆の低下などが与られる０
表中、耐火物の溶損速度は従来の多孔質ノズル（ポーラ
ス）でガス通気１００ｉクロン以下の場合の溶損速度カ
ニ２５〜５．０■／＠ｈでＴｏ抄、本発明のノズルは非
多孔質煉瓦ノズルに１−φＩｌ［の貫通孔を設けた場合
の溶損速度が０．８〜０．９■／ａｈと極めて溶損速度
ｐ；小さいことが理解される。Table 1 below shows nine examples in which the molten metal refining nozzle of the present invention was used for combined blowing (top blowing and bottom blowing) K641oh in a converter. As is clear from Table 1, the yield was improved by 0.5911 points compared to top blowing only, and the effect was also obtained for ferroalloys. Other effects include shortening blowing time and lowering IL& of steel.
In the table, the erosion rate of refractories is 25 to 5.0 cm/@h with a conventional porous nozzle (porous) when gas aeration is 100 i/h, and the nozzle of the present invention is It is understood that when a porous brick nozzle is provided with a through hole of 1-φIl, the erosion rate is 0.8 to 0.9 .mu./ah, which is extremely low.
第５図は本発明によるノズルの吹込ガスの流量制御特性
を示すグラフである。FIG. 5 is a graph showing the flow rate control characteristics of the blown gas of the nozzle according to the present invention.
第４図は使用条件をノズル材質Ｍ、０−Ｃ（Ｃ２０１１
）底吹ガス圧力４〜２０’Ｐ／ｃＩＩＧｓ流量１０〜２
０ＯＮ＃／／Ｈｒ−、本、 ガス穫類Ａｒ、 Ｃａｌ
、 Ｎｌ、操業条件を出嘔
城
鍋温ｔ １６８０〜１６８５ｔＺ’、 底吹パターン
は第６図の通り、として吹錬を行った場合のノズルの耐
用却命の推移を示すグラフである。Figure 4 shows the usage conditions for nozzle material M, 0-C (C2011
) Bottom blowing gas pressure 4~20'P/cIIGs flow rate 10~2
0ON#//Hr-, book, gas harvest Ar, Cal
, Nl, the operating conditions are a pot temperature t of 1680 to 1685 tZ', and a bottom blowing pattern as shown in FIG. 6.
第６図は出鋼温度と溶損速度の関係を示すグラフである
。FIG. 6 is a graph showing the relationship between tapping temperature and melting loss rate.
崗、第４図、第５図の場合の底吹ガスがＣＯ，の場合は
Ａｒの場合より溶損速度が大きい理由は、（１） Ｆ
＠（至）＋Ｃ０３（め→Ｆ＠Ｏ＋ Ｃ０Ｆ＠０ ＋ Ｃ
（Ｍ匹−Ｃ中）→Ｆ＠（イ）＋Ｃ０（ｕ） （Ｆ＠
Ｏ） ＋ Ｃ（Ｍ卸−Ｃ中）→Ｆ＠（イ）＋ｃ。The reason why the erosion rate is higher when the bottom blowing gas is CO in the case of Figures 4 and 5 than when it is Ar is that (1) F
@(to)+C03(me→F@O+ C0F@0 + C
(M animals - in C) → F@ (a) + C0 (u) (F@
O) + C (M wholesale - C middle) → F@(I) + c.
上記の反応よりＭｔｏ−Ｃ中のＣがＦ＠Ｏにより還元さ
れ、Ｍ％が直接溶損されていると考えられる。From the above reaction, it is thought that C in Mto-C is reduced by F@O, and M% is directly dissolved away.
（Ｆ＠に）層がα５〜１．０１１１１１１働面上に存在
）その丸めに本発明ではＭｔｏ−Ｃ中のＣの適切な量の
添加及びＣの純度向上（９５〜９９チ）、Ｍ）０の純度
向上、等の配置がなされている。(F@) layer exists on α5~1.0111111 working surface) In order to round it off, the present invention adds an appropriate amount of C in Mto-C and improves the purity of C (95~99ch), M) 0 purity improvement, etc. are arranged.
本発明の溶融金属精錬用ノズルは、以上の実施例によっ
て明らかなように、ガス吹込みの際の流量制御が広範囲
に可能であ抄、従って吹錬効果が向上するばかりでなく
、ノズル自体の耐用寿命を弧長させることも可能である
。As is clear from the above embodiments, the molten metal refining nozzle of the present invention not only allows for wide range control of the flow rate during gas injection, improving the blowing effect, but also improves the nozzle itself. It is also possible to lengthen the service life.
第１図は本発明の溶融金属精錬用ノズルの一例を示す縦
断面図であり、第２図は前記ノズルの平面図である。第
６図は本発明のノズルによる流量制御特性を示すグラフ
であり、第４図はノズルの溶損速度の推移を示すグラフ
であり、第５図はノズルの溶損速度と出鋼温度の関係を
示すグツ７であり、第６図は第４図にデータを示したテ
ストの底吹パターンを示すグラフである。
（１）耐火物、２）貫通孔、６）金属製カバー、（４）
圧力箱、（５）上部金属板、（６）下部金属板、（７）
ガス送入管。
代理人摺埋士佐籐正年FIG. 1 is a longitudinal sectional view showing an example of a molten metal refining nozzle of the present invention, and FIG. 2 is a plan view of the nozzle. Fig. 6 is a graph showing the flow rate control characteristics of the nozzle of the present invention, Fig. 4 is a graph showing the change in the melting rate of the nozzle, and Fig. 5 is a graph showing the relationship between the melting rate of the nozzle and the tapping temperature. Figure 6 is a graph showing the bottom blow pattern of the test whose data is shown in Figure 4. (1) Refractory, 2) Through hole, 6) Metal cover, (4)
Pressure box, (5) upper metal plate, (6) lower metal plate, (7)
Gas feed pipe. Agent Suri Burialist Masatoshi Sato
Claims (4)
物と、該耐火物の側面の一部又は全部を囲む金属性カバ
ーと、前記耐火物の底部に設けられていて前記貫通孔と
連通しかつガス溜め空間を形成する圧力精と、よりなる
ことを特徴とする溶融金属精錬用ノズル。(1) A refractory having a number of through holes extending from the use surface to the back, a metal cover surrounding part or all of the side surfaces of the refractory, and a through hole provided at the bottom of the refractory. 1. A molten metal refining nozzle characterized by comprising: a pressure ejector communicating with the gas reservoir space and forming a gas reservoir space;
０■以下としである特許請求の範囲第１項記載の溶融金
属精錬用ノズル。(2) The interval between the plurality of through holes in the refractory is 6 or more than 15
A molten metal refining nozzle according to claim 1, which has a molten metal refining nozzle of 0 or less.
された金属管よりな抄、骸金属管の肉厚が０．１Ｗ以上
１０−以下としである特許請求の範囲第１項記載の溶融
金属精錬用ノズル。(3) The plurality of through holes of the refractory are made of metal tubes drilled in the refractory, and the wall thickness of the metal tube is 0.1W or more and 10- or less. The described nozzle for smelting molten metal.
鉄板よりなっている特許請求の範ｉ！＠第１項記載の溶
融金属精錬用ノズル。 （団 前記圧力箱のガス溜め空間を形成する上部金属板
と下部金属板との間隔を２−以上５０−以下としである
特許請求の範囲第１項記載の溶融金属精錬用ノズル。(4) Claim 1, wherein the metal cover is made of an iron plate with a thickness of 0.1 to 5. @The molten metal refining nozzle described in item 1. (Group) The nozzle for molten metal refining according to claim 1, wherein the interval between the upper metal plate and the lower metal plate forming the gas reservoir space of the pressure box is 2 to 50.
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5055182A JPS58167717A (en) | 1982-03-29 | 1982-03-29 | Nozzle for refining molten metal |
| PCT/JP1983/000098 WO1983003427A1 (en) | 1982-03-29 | 1983-03-29 | Bottom blowing gas nozzle in molten metal refining furnace and method of melting steel using the same nozzle |
| BR8306711A BR8306711A (en) | 1982-03-29 | 1983-03-29 | GAS INSULATING TUBE THROUGH THE FUND FOR FUSING METAL REFINING OVEN AND STEEL REFINING PROCESS USING THE SAME |
| US06/556,162 US4539043A (en) | 1982-03-29 | 1983-03-29 | Bottom-blown gas blowing nozzle |
| EP83900974A EP0105380B1 (en) | 1982-03-29 | 1983-03-29 | Bottom blowing gas nozzle in molten metal refining furnace and method of melting steel using the same nozzle |
| AU13719/83A AU567023B2 (en) | 1982-03-29 | 1983-03-29 | Bottom blown gas blowing nozzle for maltev metal refining furnace and steel refining method using the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5055182A JPS58167717A (en) | 1982-03-29 | 1982-03-29 | Nozzle for refining molten metal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS58167717A true JPS58167717A (en) | 1983-10-04 |
Family
ID=12862147
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5055182A Pending JPS58167717A (en) | 1982-03-29 | 1982-03-29 | Nozzle for refining molten metal |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58167717A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59118822A (en) * | 1982-12-24 | 1984-07-09 | Kawasaki Refract Co Ltd | Gas blowing nozzle for vessel containing molten metal |
| JPS60149709A (en) * | 1983-12-12 | 1985-08-07 | アルベッド エス．アー． | Refractory gas permeation element |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55149750A (en) * | 1979-05-11 | 1980-11-21 | Kawasaki Steel Corp | Gas blowing plug for molten metal vessel |
| JPS563268B2 (en) * | 1977-11-22 | 1981-01-23 | ||
| JPS5621799A (en) * | 1979-07-27 | 1981-02-28 | Yamakita Tekkosho Kk | Raw material feeder for drieddbonito plane |
| JPS5811718A (en) * | 1981-07-15 | 1983-01-22 | Nippon Steel Corp | Bottom-blowing nozzle |
| JPS5812263B2 (en) * | 1979-03-19 | 1983-03-07 | 田伏 岩夫 | Macrocyclic hexaketones and their production method |
-
1982
- 1982-03-29 JP JP5055182A patent/JPS58167717A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS563268B2 (en) * | 1977-11-22 | 1981-01-23 | ||
| JPS5812263B2 (en) * | 1979-03-19 | 1983-03-07 | 田伏 岩夫 | Macrocyclic hexaketones and their production method |
| JPS55149750A (en) * | 1979-05-11 | 1980-11-21 | Kawasaki Steel Corp | Gas blowing plug for molten metal vessel |
| JPS5621799A (en) * | 1979-07-27 | 1981-02-28 | Yamakita Tekkosho Kk | Raw material feeder for drieddbonito plane |
| JPS5811718A (en) * | 1981-07-15 | 1983-01-22 | Nippon Steel Corp | Bottom-blowing nozzle |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59118822A (en) * | 1982-12-24 | 1984-07-09 | Kawasaki Refract Co Ltd | Gas blowing nozzle for vessel containing molten metal |
| JPS60149709A (en) * | 1983-12-12 | 1985-08-07 | アルベッド エス．アー． | Refractory gas permeation element |
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