JPS6338514A - Method for removing inclusion by centrifugal force - Google Patents
Method for removing inclusion by centrifugal forceInfo
- Publication number
- JPS6338514A JPS6338514A JP18324186A JP18324186A JPS6338514A JP S6338514 A JPS6338514 A JP S6338514A JP 18324186 A JP18324186 A JP 18324186A JP 18324186 A JP18324186 A JP 18324186A JP S6338514 A JPS6338514 A JP S6338514A
- Authority
- JP
- Japan
- Prior art keywords
- inclusions
- molten steel
- ladle
- liquid
- centrifugal force
- 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
- 238000000034 method Methods 0.000 title claims description 17
- 239000007788 liquid Substances 0.000 claims abstract description 21
- 230000002745 absorbent Effects 0.000 claims abstract description 4
- 239000002250 absorbent Substances 0.000 claims abstract description 4
- 239000002245 particle Substances 0.000 claims description 7
- 230000005484 gravity Effects 0.000 claims description 6
- 239000007787 solid Substances 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 abstract description 27
- 239000010959 steel Substances 0.000 abstract description 27
- 239000002893 slag Substances 0.000 abstract description 14
- 230000001133 acceleration Effects 0.000 abstract description 2
- 239000002184 metal Substances 0.000 description 8
- 229910052751 metal Inorganic materials 0.000 description 8
- 239000000956 alloy Substances 0.000 description 7
- 229910045601 alloy Inorganic materials 0.000 description 7
- 238000007667 floating Methods 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000002844 melting Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 239000011819 refractory material Substances 0.000 description 4
- 230000003749 cleanliness Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 229910010293 ceramic material Inorganic materials 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 description 1
- 235000012255 calcium oxide Nutrition 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005188 flotation Methods 0.000 description 1
- 239000010436 fluorite Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000009847 ladle furnace Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Treatment Of Steel In Its Molten State (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、液体より比重の小さい固体（粒子）を含有す
る液体中から同固体を分離除去する方法、例えば鋼を製
造する工程において、最終段階で合金を添加して脱酸す
るときに発生する非金属介在物を安価でかつ効率的に除
去する方法に関するものである。Detailed Description of the Invention (Industrial Application Field) The present invention provides a method for separating and removing solids (particles) having a lower specific gravity than the liquid from a liquid, for example, in the process of manufacturing steel. The present invention relates to a method for inexpensively and efficiently removing nonmetallic inclusions generated during deoxidation by adding an alloy in a step.
（従来の技術） 以下、鋼の製造を例として説明する。(Conventional technology) Hereinafter, the manufacturing of steel will be explained as an example.
上記介在物の分離装置として最新のものにセラミックス
製の多孔質材による介在物フィルターが案出されている
。、また、取鍋の底よりアルゴンガスを吹き込み加熱保
持するＬＰ（Ｌａｄｌｅ Ｆｕｒ−ｎａｃｅ）法も介在
物の浮上を狙っている。その他特殊な合金を使用し、介
在物の融点を下げ凝集浮上を行う介在物の形態制御が試
みられている。As the latest inclusion separation device, an inclusion filter made of a porous ceramic material has been devised. In addition, the LP (Ladle Fur-nace) method, in which argon gas is blown into the bottom of the ladle and maintained while heating, also aims at floating the inclusions. Other attempts have been made to use special alloys to control the morphology of inclusions by lowering their melting point and causing them to coagulate and float.
通常、鋼の精錬後の溶湯には酸素が平模ｉ値以上に含ま
れている。次の工程では合金を添加し、て鋼の規定の成
分に調整して鋳造するが、ここで上記の酸素と合金中の
元素が反応して非金属介在物を生成し、鋳造工程及び製
品に悪影舌を与える。Usually, molten steel after refining contains oxygen in an amount equal to or higher than the Hirami i value. In the next step, an alloy is added, adjusted to the specified composition of steel, and cast. At this point, the above oxygen and the elements in the alloy react to form nonmetallic inclusions, which affect the casting process and the product. Gives an evil tongue.
即ち、鋳造工程において金属以外の物が鋳込まれること
になり、その結果、表面割れが起Ｊり或は表面肌が悪く
なり不良品が発生する。また、製品中に介在物が含まれ
ると強度低下、特に靭性が低下する傾向となる。That is, in the casting process, something other than metal is cast, and as a result, surface cracks occur or the surface texture deteriorates, resulting in defective products. Furthermore, if inclusions are included in the product, the strength tends to decrease, particularly the toughness.
発生した非金属介在物は鋼に対して比重が軽いため重力
場（ＩＧ）の作用により長時間経過すれば浮上するが、
粒径の小さな介在物の浮上には更に長時間を必要とし、
この間に溶湯が凝固して鋳造不能となるので加熱が必要
となる。The generated non-metallic inclusions have a light specific gravity compared to the steel, so they will float up after a long period of time due to the action of the gravitational field (IG).
It takes a longer time for small-sized inclusions to float,
During this time, the molten metal solidifies and becomes uncastable, so heating is required.
この加熱設備は電源が必要であり、高価なため特殊な用
途以外には使われない。また、前述の介在物の融点を下
げ凝集浮上を目的として特殊な合金を使う方法は製造コ
ストが高価となる。This heating equipment requires a power source and is expensive, so it is only used for special purposes. Furthermore, the method of using a special alloy for the purpose of lowering the melting point of the inclusions and causing agglomeration and flotation requires high manufacturing costs.
一方、介在物をフィルターを通して流す方法は介在物に
より目詰まりが生じ、長時間の使用ができなくなるのと
同時に高価なセラミックス材を使わなければならない。On the other hand, the method of flowing the inclusions through a filter causes clogging due to the inclusions, making it impossible to use for a long time and requiring the use of expensive ceramic materials.
（発明が解決しようとする問題点）
本発明は、高価でかつ非効率に過ぎるという従来の問題
点を解決すぺ（なされたもので、簡単な装置を使い効率
的に介在物を除去し得る方法を提供しようとするもので
ある。(Problems to be Solved by the Invention) The present invention has been made to solve the conventional problems of being too expensive and inefficient, and it is possible to efficiently remove inclusions using a simple device. It is intended to provide a method.
（問題点を解決するための手段及び作用）このため、本
発明は液体に比べて比重の小さい固体（粒子）を内部に
介在する液体から同介在物を除去する方法において、垂
直軸線回りで回転可能な有蓋密閉容器内に前記介在物を
含有する液体を入れると共に、同液体中に前記介在物の
吸収剤を投入後、前記密閉容器を遠心力が５Ｇ〜１００
Ｇとなる如く回転させることにより介在物を分離浮上除
去することを構成とし、これを上記問題点の解決手段と
するものである。(Means and effects for solving the problem) For this reason, the present invention provides a method for removing inclusions from a liquid containing solids (particles) with a smaller specific gravity than that of a liquid by rotation around a vertical axis. After putting the liquid containing the inclusions into a closed container with a lid and adding an absorbent for the inclusions into the liquid, the closed container is subjected to a centrifugal force of 5G to 100%.
The structure is such that the inclusions are separated and floated away by rotating at an angle of G, and this is used as a means to solve the above-mentioned problems.
即ち、本発明には次に挙げる２つの重要な特徴がある。That is, the present invention has the following two important features.
（１）ストークスの法則によれば、比重の異なる液体と
固体（粒子）の間において重力場での浮上速度が次式で
与えられる。(1) According to Stokes' law, the floating speed in a gravitational field between a liquid and a solid (particle) with different specific gravity is given by the following equation.
ｖ＝２ Ｃｐ−ｐｓ ）ＧＲ” ／ （９μ）ρ、ρＳ
：液体粒子の密度
Ｒ：粒子
μ ：粘性係数
この重力場（ＩＧ）に対して遠心力を作用させる事によ
り（Ｇが増加）介在物の浮上速度を増加させることを特
徴とする。v=2 Cp-ps)GR”/(9μ)ρ,ρS
: Density of liquid particles R : Particle μ : Viscosity coefficient It is characterized by increasing the floating speed of inclusions by applying centrifugal force to this gravitational field (IG) (G increases).
（２） 装置は蓋付密閉容器を回転させるものであり
、この回転により容器内の液体上面中央部゛に２次式で
表わされる放物線の凹みが作られ、この表面に介在物が
集められるとき介在物を吸収する成分を持つ吸収剤を作
用させることをもう一つの特徴とする。(2) The device rotates a closed container with a lid, and this rotation creates a parabolic depression expressed by a quadratic equation in the center of the upper surface of the liquid in the container, and when inclusions are collected on this surface. Another feature is that an absorbent having a component that absorbs inclusions is used.
本発明を鋼の製造に適用した場合は、精錬後の合金を添
加した取鍋に、その回転により湯がこぼれないように蓋
を取付けてから回転を与える。最初は取鍋に対して溶湯
の回転が遅れるが、すぐに同じ回転数となり溶湯が壁面
に押し付けられる周方向に遠心力が働き、比重の軽い介
在物は内側に押出され、これがあらかじめ添加したスラ
グに吸収されて溶湯は清浄となる。When the present invention is applied to the production of steel, a lid is attached to the ladle to which the refined alloy is added to prevent hot water from spilling due to the rotation, and then the ladle is rotated. At first, the rotation of the molten metal is delayed relative to the ladle, but soon the rotation speed becomes the same and a centrifugal force acts in the circumferential direction that presses the molten metal against the wall surface, and inclusions with a light specific gravity are pushed inward, and this turns into the slag added in advance. The molten metal becomes clean as it is absorbed by the molten metal.
（実施例）
以下、本発明方法に使用する装置について溶鋼を例にと
って図面に基づいて説明する。(Example) Hereinafter, the apparatus used in the method of the present invention will be explained based on the drawings, taking molten steel as an example.
本発明の実施に当っては特殊な取鍋ｌと鍋蓋２を使用す
る。取鍋１は円筒形状であってその内面は耐火材１ａで
内張すされ、底部には出鋼用のノズル及びスライドゲー
トパルプ１ｂを設け、外側面には補強リング１ｃを設け
ることにより遠心力に十分耐え得る強固な構造としてい
る。鍋蓋２も取鍋１と同じ円筒形状であって、内面は耐
火材２ａで内張すされ、中心頂部に覗窓２ｂを設けてい
る。鍋蓋２は取鍋１上にコツタ４によってしっかりと固
定して、適当な内容積を保有し、かつ遠心力によって溶
鋼が飛び出し又は洩れない様にしている。In carrying out the invention, a special ladle 1 and a special pot lid 2 are used. The ladle 1 has a cylindrical shape, and its inner surface is lined with a refractory material 1a.A nozzle for tapping steel and a slide gate pulp 1b are provided at the bottom, and a reinforcing ring 1c is provided on the outer surface to prevent centrifugal force. It has a strong structure that can withstand high temperatures. The pot lid 2 also has the same cylindrical shape as the ladle 1, the inner surface is lined with a refractory material 2a, and a viewing window 2b is provided at the top of the center. The pot lid 2 is securely fixed onto the ladle 1 by a clasp 4 to have an appropriate internal volume and to prevent molten steel from popping out or leaking due to centrifugal force.
また、取鍋１及び鍋蓋２はそれぞれ単独に特殊な吊具３
によって着脱・運搬を可能としている。In addition, the ladle 1 and the pot lid 2 are each individually equipped with a special hanging tool 3.
This makes it possible to attach, detach, and transport.
一方、取！１１４１の回転装置は軸受７を中心とし、少
なくとも３個以上の支持ローラ８に支持されて高速回転
可能とした回転台５が設置されており、それぞれの支持
ロール８は駆動用電動機９と直結されていて摩擦伝導に
よって回転台５が高速で回転するものである。これらの
支持ロール８、駆動用電動機９は回転台５の円周方向に
等角度に分配され放射線状に配置されている。On the other hand, take it! The rotation device of 1141 is equipped with a rotary table 5 which is centered around a bearing 7 and is supported by at least three support rollers 8 to enable high-speed rotation, and each support roll 8 is directly connected to a driving electric motor 9. The rotary table 5 rotates at high speed due to frictional conduction. These support rolls 8 and driving electric motors 9 are distributed at equal angles in the circumferential direction of the rotary table 5 and arranged radially.
取鍋１の大きな振れを防止するため、取鍋１の側面を受
けるガイドロール１０ａ、１０ｂを有する案内装置１０
が少なくとも３台以上設置されており、これも回転円周
方向に等間隔に配置されている。In order to prevent large swings of the ladle 1, a guide device 10 has guide rolls 10a and 10b that receive the sides of the ladle 1.
At least three or more are installed, and these are also arranged at equal intervals in the rotational circumferential direction.
取鍋ｌと鍋蓋２は回転台５に設けられた案内６に沿って
回転軸に合せて正確に回転台５上に設置する。駆動電動
機９により回転台５が矢印１３で示す如く垂直線回りを
回転すると、取鍋１及び鍋蓋２も回転台５と共に回転し
、それにつれて取鍋１内の溶鋼１１も回転を始める。こ
の取鍋１及び溶鋼１１を回転させる場合、非常に大きな
慣性力が働くので駆動電動機９として直流電動機を使用
し、回転数制御を行う。The ladle l and the pot lid 2 are accurately installed on the rotary table 5 along the guide 6 provided on the rotary table 5 and aligned with the rotation axis. When the rotary table 5 rotates around a vertical line as shown by the arrow 13 by the drive motor 9, the ladle 1 and the pot lid 2 also rotate together with the rotary table 5, and accordingly, the molten steel 11 in the ladle 1 also starts to rotate. When rotating the ladle 1 and the molten steel 11, a very large inertial force acts, so a DC motor is used as the drive motor 9 to control the rotation speed.
取鍋１内の溶日１１及びスラグ１２は所定の速度で回転
すると、大きな遠心力を受けて周辺に集まり、溶鋼１１
は一点鎖線で示す軌跡１１′の様に側壁に密着しスラグ
１２はその内面に拡がる。When the molten steel 11 and slag 12 in the ladle 1 rotate at a predetermined speed, they receive a large centrifugal force and gather around the molten steel 11.
is in close contact with the side wall, and the slag 12 spreads on its inner surface as shown by a locus 11' indicated by a dashed line.
この様に溶ａｌｌが５Ｇ〜１００Ｇの遠心加速度を受け
て回転すると、溶鋼中の介在物は分離が促進され、分離
された介在物はスラグに吸着されるため、回転を停止す
ると清浄な溶鋼が得られることとなる。When the molten metal rotates under a centrifugal acceleration of 5G to 100G, the separation of inclusions in the molten steel is promoted, and the separated inclusions are adsorbed by the slag, so when the rotation is stopped, clean molten steel is produced. This will be obtained.
以上の装置を使って１ ｋｇの溶鋼に対する本発明の実
施例を具体的に説明する。An example of the present invention for 1 kg of molten steel will be specifically described using the above-described apparatus.
アルミナルツボ内に電解鉄を入れて高周波炉によって溶
解し１６００°Ｃに保持した。取鍋ｌとしてのルツボは
内径６８×高さ８０龍である。これに中心に２０鰭の穴
の明いた蓋を取付は接着した。Electrolytic iron was placed in an alumina crucible, melted in a high frequency furnace, and maintained at 1600°C. The crucible serving as the ladle 1 has an inner diameter of 68 mm and a height of 80 mm. A lid with 20 fin holes in the center was attached and glued to this.
脱酸は金属／ｌを使って行い、Ａ７！が十分溶解してか
ら凝固させたものと（回転Ｏ）、スラグである生石灰と
螢石の１；１の混合物を２０ｇ添加して７５０ ｒ、ｐ
、ｍで５分間回転し、処理後に凝固させたもの（回転５
分、１０Ｇ）を比較した。Deoxidation is done using metal/l, A7! was sufficiently dissolved and then solidified (rotation O), and 20 g of a 1:1 mixture of quicklime and fluorite, which is slag, were added and heated at 750 r, p.
, m for 5 minutes and solidified after treatment (rotation 5
minutes, 10G).
回転０の場合は介在物の浮上する最大距＾１ｔはルツボ
の底部から５０１１であるが、回転５分の場合溶鋼はル
ツボの側面に集まり、介在物の移動距離は１２ｎとなる
。When the rotation is 0, the maximum floating distance ^1t of the inclusions is 5011 from the bottom of the crucible, but when the rotation is 5 minutes, the molten steel collects on the side of the crucible, and the moving distance of the inclusions is 12n.
凝固後の断面について清浄度をＪＩＳ法に準じて測定し
た。The cleanliness of the cross section after solidification was measured according to the JIS method.
回転０の場合は清浄度０．２０％であったが、回転５分
処理材は清浄度０．０５％となり前者の１７４に低下し
た。また、介在物の大きさは、回転０の場合には５０μ
ｍ程度のものが見付けられるが、回転５分処理のものは
２０μｍ以上の介在物は見付けられなかった。When the rotation was 0, the cleanliness was 0.20%, but when the material was rotated for 5 minutes, the cleanliness was 0.05%, lowering to 174 of the former. In addition, the size of the inclusion is 50μ when the rotation is 0.
However, no inclusions of 20 μm or more were found in the sample processed by rotation for 5 minutes.
取鍋の回転による処理の場合、中心部に集めた介在物の
吸収化が重要で、このためには凹みの内面に存在するス
ラグの融点を低く保つような組成とする。例えば、ガラ
ス系や塩化物系のスラグ組成が使用される。In the case of processing by rotating a ladle, it is important to absorb the inclusions collected in the center, and for this purpose the composition must be such that the melting point of the slag present on the inner surface of the recess is kept low. For example, glass-based or chloride-based slag compositions are used.
低融点のスラグは同時に耐火物（取鍋）の浸食も大きい
ため回転数を徐々に下げて湾口表面を凹形にした所で吸
引除滓機によって除滓すれば耐火物浸食を最小に抑えな
がら処理することが可能となる。Low-melting point slag also causes great erosion of refractories (ladles), so if the rotation speed is gradually lowered and the slag is removed using a suction sludge machine at a point where the bay mouth surface is made concave, erosion of the refractories can be minimized. It becomes possible to process.
回転開始及び回転停止の場合、溶鋼は乱流状態となり空
気を巻き込んで再酸化又は窒素ガスの吸収が起こるので
、前記処理中にＡｒ等の不活性ガスを使うことによって
これらを防止する ４ことができる。When the rotation starts and stops, the molten steel enters a turbulent state, entraining air and causing re-oxidation or absorption of nitrogen gas, so this can be prevented by using an inert gas such as Ar during the above process. can.
なお、本実施例では溶鋼を例にとって説明したが、これ
に限るものではなく他の液体からその介在物を除去する
装置にも適用可能なことは勿論である。Although the present embodiment has been described using molten steel as an example, the present invention is not limited to this and can of course be applied to devices that remove inclusions from other liquids.
（発明の効果）
以上、詳細に説明した如く本発明によると、液体を密閉
容器ごと回転し液体及び介在物に遠心力を与えることに
より、液中の介在物が素早く中心部に集まりそこでスラ
グに吸収させて除去されるものである。この遠心処理が
行われないときは巨大介在物のため製品に傷が見られる
ようになり不良品となる場合がある。遠心力処理によっ
て製品中の介在物は粒子が微小なもの以外は除去される
ため、製品は安定して良好なものとなった。また、本発
明方法においては高価な加熱設備や特殊なセラミックス
又は特殊な合金類が使用されないため、安価でしかも高
質の鋼が製造できる効果をもたらすものである。(Effects of the Invention) As described above in detail, according to the present invention, by rotating the liquid together with the closed container and applying centrifugal force to the liquid and the inclusions, the inclusions in the liquid quickly gather to the center and form slag there. It is removed by absorption. If this centrifugation treatment is not performed, the product may show scratches due to large inclusions, resulting in a defective product. The centrifugal force treatment removed all inclusions in the product except those with very small particles, resulting in a stable and good quality product. Furthermore, since the method of the present invention does not use expensive heating equipment, special ceramics, or special alloys, it has the effect of producing high-quality steel at low cost.
図は本発明を実施するための一例を示す取鍋回転装置の
一部側断面図である。
図の主要部分の説明
１−・取鍋
２−・鍋蓋
５−回転台
９−・−駆動用電動機
１１−−・ン容量
１２・−スラグ
特 許 出 願 人 三菱重工業株式会社同
菱重製鉄エンジニアリン
グサービス株式会社
手続補正書は式）
昭和６１年１１月１２日
特許庁長官 黒 １）明 誰 殿
１、事件の表示
特願昭６１−１８３２４１号
２、発明の名称
遠心力による介在物除去方法
３、補正をする者
事件と、の関係 特許出願人
住 所 東京都千代田区丸の内二丁目５番１号名 称
（６２０） 三菱重工業株式会社外１名４、代理人
住 所 東京都千代田区丸の内二丁目５番１号三菱重工
業株式会社内
氏 名 （６９２４）弁理士 石 川 新 外２
名５、復代理人
補正の内容
１、明細書第１１頁第１〜２行目の「図は〜である。」
の記載を次のように補正する。
「第１図は本発明の実施例を示す取鍋回転装置の一部断
面側面図、第２図は吊具の１実施例を示す側面図である
。」
２、図面を第１図及び第２図に分けて、別紙の通り補正
する。
以上The figure is a partial side sectional view of a ladle rotating device showing an example of carrying out the present invention. Explanation of the main parts of the diagram 1 - Ladle 2 - Pot lid 5 - Turntable 9 - Drive motor 11 - Capacity 12 - Slag patent applicant Mitsubishi Heavy Industries, Ltd.
Ryoju Steel Engineering Service Co., Ltd. Procedural Amendment Form) November 12, 1985 Commissioner of the Patent Office Black 1) Ming He 1, Indication of the case Patent Application No. 183241/1983 2, Name of the invention Intervention by centrifugal force Relationship between object removal method 3 and the case of the person making the amendment Patent applicant address 2-5-1 Marunouchi, Chiyoda-ku, Tokyo Name
(620) Mitsubishi Heavy Industries, Ltd., 1 external person 4, agent address: 2-5-1 Marunouchi, Chiyoda-ku, Tokyo, Mitsubishi Heavy Industries, Ltd. Name (6924) Patent attorney Arata Ishikawa, external 2
Name 5, Contents 1 of sub-agent amendment, "The figure is..." in lines 1 and 2 of page 11 of the specification.
amend the description as follows. ``Figure 1 is a partially cross-sectional side view of a ladle rotating device showing an embodiment of the present invention, and Figure 2 is a side view showing one embodiment of a hanging tool.'' 2. Divide into two figures and correct as shown in the attached sheet. that's all
Claims (1)
る液体から同介在物を除去する方法において、垂直軸線
回りで回転可能な有蓋密閉容器内に前記介在物を含有す
る液体を入れると共に、同液体中に前記介在物の吸収剤
を投入後、前記密閉容器を遠心力が５Ｇ〜１００Ｇとな
る如く回転させることにより介在物を分離浮上除去する
ことを特徴とする遠心力による介在物除去方法。In a method for removing inclusions from a liquid containing solids (particles) with a smaller specific gravity than the liquid, the liquid containing the inclusions is placed in a closed container with a lid that can be rotated about a vertical axis; A method for removing inclusions by centrifugal force, characterized in that after adding an absorbent for inclusions into the liquid, the sealed container is rotated so that a centrifugal force of 5G to 100G is applied to separate and float away the inclusions. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18324186A JPS6338514A (en) | 1986-08-04 | 1986-08-04 | Method for removing inclusion by centrifugal force |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18324186A JPS6338514A (en) | 1986-08-04 | 1986-08-04 | Method for removing inclusion by centrifugal force |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6338514A true JPS6338514A (en) | 1988-02-19 |
Family
ID=16132245
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18324186A Pending JPS6338514A (en) | 1986-08-04 | 1986-08-04 | Method for removing inclusion by centrifugal force |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6338514A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02121583U (en) * | 1989-03-16 | 1990-10-03 | ||
| WO1999060177A1 (en) * | 1998-05-14 | 1999-11-25 | Voest-Alpine Industrial Services Gmbh | Method for continuous separation of impurities and alloyings from liquid metal baths and device for implementing said method |
| CN103602782A (en) * | 2013-11-12 | 2014-02-26 | 北京科技大学 | Method for removing nonmetallic inclusions in molten steel by means of supergravity |
| CN106755748A (en) * | 2017-03-02 | 2017-05-31 | 江苏省冶金设计院有限公司 | The system and method for separating high-temp melt field trash |
-
1986
- 1986-08-04 JP JP18324186A patent/JPS6338514A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02121583U (en) * | 1989-03-16 | 1990-10-03 | ||
| JPH0616055Y2 (en) * | 1989-03-16 | 1994-04-27 | ヤマハ株式会社 | Fire door structure |
| WO1999060177A1 (en) * | 1998-05-14 | 1999-11-25 | Voest-Alpine Industrial Services Gmbh | Method for continuous separation of impurities and alloyings from liquid metal baths and device for implementing said method |
| AT409091B (en) * | 1998-05-14 | 2002-05-27 | Voest Alpine Ind Services Gmbh | METHOD FOR CONTINUOUSLY SEPARATING IMPURITIES AND ALLOYS FROM LIQUID METAL BATHS, AND APPARATUS FOR CARRYING OUT THIS METHOD |
| CN103602782A (en) * | 2013-11-12 | 2014-02-26 | 北京科技大学 | Method for removing nonmetallic inclusions in molten steel by means of supergravity |
| CN106755748A (en) * | 2017-03-02 | 2017-05-31 | 江苏省冶金设计院有限公司 | The system and method for separating high-temp melt field trash |
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