JPH0137447B2 - - Google Patents
Info
- Publication number
- JPH0137447B2 JPH0137447B2 JP61279897A JP27989786A JPH0137447B2 JP H0137447 B2 JPH0137447 B2 JP H0137447B2 JP 61279897 A JP61279897 A JP 61279897A JP 27989786 A JP27989786 A JP 27989786A JP H0137447 B2 JPH0137447 B2 JP H0137447B2
- Authority
- JP
- Japan
- Prior art keywords
- cooling
- oxygen
- liquid metal
- liquid
- 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.)
- Expired
Links
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 24
- 239000001301 oxygen Substances 0.000 claims description 24
- 229910052760 oxygen Inorganic materials 0.000 claims description 24
- 238000001816 cooling Methods 0.000 claims description 23
- 238000000034 method Methods 0.000 claims description 16
- 229910001338 liquidmetal Inorganic materials 0.000 claims description 14
- 238000002347 injection Methods 0.000 claims description 12
- 239000007924 injection Substances 0.000 claims description 12
- 229910000831 Steel Inorganic materials 0.000 claims description 9
- 229910052751 metal Inorganic materials 0.000 claims description 9
- 239000002184 metal Substances 0.000 claims description 9
- 239000010959 steel Substances 0.000 claims description 9
- 229910000805 Pig iron Inorganic materials 0.000 claims description 5
- 239000000110 cooling liquid Substances 0.000 claims description 5
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 3
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 2
- 229910000978 Pb alloy Inorganic materials 0.000 claims description 2
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims description 2
- 229910045601 alloy Inorganic materials 0.000 claims description 2
- 239000000956 alloy Substances 0.000 claims description 2
- 229910052744 lithium Inorganic materials 0.000 claims description 2
- 229910052700 potassium Inorganic materials 0.000 claims description 2
- 239000011591 potassium Substances 0.000 claims description 2
- 229910052708 sodium Inorganic materials 0.000 claims description 2
- 239000011734 sodium Substances 0.000 claims description 2
- 229910000733 Li alloy Inorganic materials 0.000 claims 1
- 238000009835 boiling Methods 0.000 claims 1
- 238000010438 heat treatment Methods 0.000 claims 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 239000002826 coolant Substances 0.000 description 4
- 239000002893 slag Substances 0.000 description 4
- 239000007788 liquid Substances 0.000 description 3
- 239000003345 natural gas Substances 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 238000005272 metallurgy Methods 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000000112 cooling gas Substances 0.000 description 1
- 238000005262 decarbonization Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- 230000002706 hydrostatic effect Effects 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000009849 vacuum degassing Methods 0.000 description 1
Classifications
-
- 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
- C21C5/30—Regulating or controlling the blowing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D9/00—Cooling of furnaces or of charges therein
-
- 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
- C21C5/4646—Cooling arrangements
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces
- F27B3/10—Details, accessories, or equipment peculiar to hearth-type furnaces
- F27B3/24—Cooling arrangements
-
- 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
- C21C5/4606—Lances or injectors
- C21C2005/4626—Means for cooling, e.g. by gases, fluids or liquids
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
- Treatment Of Steel In Its Molten State (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
- Furnace Charging Or Discharging (AREA)
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、底部吹込み転炉、平炉、電気炉また
はその他の冶金用容器における銑鉄または鋼の酸
素処理用の、少なくとも１個の冷却液が導通する
冷却ジヤケツトを有しかつ600℃以下の温度にお
いて加熱される酸素噴射ノズルの冷却方法に関す
る。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The invention relates to a method for oxygen treatment of pig iron or steel in bottom-blown converters, open hearths, electric furnaces or other metallurgical vessels, in which at least one cooling liquid is conductive. The present invention relates to a method for cooling an oxygen injection nozzle which has a cooling jacket and is heated at a temperature below 600°C.
従来技術及び発明が解決しようとする問題点
銑鉄または鋼の酸素処理については次の点が本
発明と関連して歴史的に重要である。Prior Art and Problems to be Solved by the Invention Regarding the oxygen treatment of pig iron or steel, the following points are of historical importance in connection with the present invention.
主として、融鉄、殊に銑鉄または鋼に対する通
常の酸素処理は、銅製水冷ノズルによつて金属浴
に酸素を上部から噴射することに基礎を置いてい
る。これが酸素冶金の出発点である。しかし、酸
素の上部吹込みは酸素冶金の初期には無条件には
受け入れられなかつた。例えば、水冷で、かつさ
らに銅製ノズルを用いて、融鉄または融鋼に酸素
を直接に下部注入する試みは30年代初期において
すでになされた。万一ノズルが破裂した場合、大
爆発の危険を伴なつて水が液体融成物に圧入され
るため、水冷ノズルの使用は困難であつた。かか
る危険を減らすため、水をノズルを介して吸出し
たが、そのために冷却力が低下した。しかし、溶
融物へ酸素を下部から噴射すると評価しうる利点
がみとめられた。核を形成するため脱炭素におけ
る一酸化炭素の泡形成がよりよい状態となる。吹
込み速度が増加し、湯玉の飛散は減少し得る。さ
らに、石灰を酸素に添加し得るので種々の理由に
より石灰による冶金学的効果が著しく改良される
ことは他の重要なる点である。平炉において溶融
物に酸素を下部より噴射することも提案された。
この場合には使用ノズルはガス冷却型であつた。
酸素は２層の同軸管の内側により導入され、天然
ガスの場合は、冷却ガスはその外側により導入さ
れる。この方法は転炉にも適用された。かかる方
法は石炭と酸素により十分に溶融されるスクラツ
プにも適用される。しかしかかる方法は著しく不
利である。天然ガスを用いて冷却することは、最
高級の鋼に対して極めて好ましくなく、かつ真空
脱気あるいはアルゴン除去により除去されねばな
らない物質である水素を金属にとり入れる原因と
なる。天然ガスの消費はコストを相当に高くす
る。さらに、噴射ノズルは冶金用容器に生じた穴
により起こりうる危険を伴つて、多くの場合制御
不可能な燃焼となる悩みが生ずる。 Mainly, the conventional oxygen treatment of molten iron, especially pig iron or steel, is based on injecting oxygen into the metal bath from above by means of copper water-cooled nozzles. This is the starting point of oxygen metallurgy. However, top injection of oxygen was not accepted unconditionally in the early days of oxygen metallurgy. For example, attempts were already made in the early 1930s to directly bottom-inject oxygen into molten iron or steel with water cooling and also using copper nozzles. The use of water-cooled nozzles has been difficult because if the nozzle were to burst, water would be forced into the liquid melt with the risk of a large explosion. To reduce this risk, water was pumped out through nozzles, but this reduced the cooling power. However, measurable advantages have been observed in injecting oxygen into the melt from below. The formation of carbon monoxide bubbles in decarbonization is better because of the formation of nuclei. Blowing speed may be increased and beading may be reduced. Furthermore, another important point is that the metallurgical effect of lime is significantly improved for various reasons since it can be added to oxygen. It has also been proposed to inject oxygen into the melt from below in an open hearth.
In this case, the nozzle used was of the gas-cooled type.
Oxygen is introduced by the inside of the two-layer coaxial tube, and in the case of natural gas, the cooling gas is introduced by the outside. This method was also applied to converters. Such a method also applies to scrap, which is fully melted by coal and oxygen. However, such a method has significant disadvantages. Cooling with natural gas is highly undesirable for the highest grade steels and causes the metal to incorporate hydrogen, a substance that must be removed by vacuum degassing or argon removal. Consumption of natural gas increases costs considerably. In addition, injection nozzles often suffer from uncontrollable combustion, with possible dangers due to holes created in the metallurgical vessel.
本記載において対象としている実施されている
公知の方法においては、冷却液体が水であつて、
既述の如き不利点が生ずる。水は熱交換器を介し
て循環されるのではなく、貯水施設あるいは本管
から導かれ、下水として排出される。 In the known method in practice, which is the subject of this description, the cooling liquid is water;
The disadvantages mentioned above arise. Rather than being circulated through a heat exchanger, the water is directed from a storage facility or mains and discharged as sewage.
本発明の目的は、さらに十分な冷却を施すため
噴射ノズルに破裂が生じても依然として適正な冷
却が行われている場合冷却用液体が溶鋼に投入さ
れることによつて起こる爆発を未然に防止する方
法を提供することにある。 The purpose of the present invention is to further provide sufficient cooling, so that even if the injection nozzle ruptures, if proper cooling is still being performed, it is possible to prevent explosions caused by cooling liquid being injected into molten steel. The goal is to provide a way to do so.
発明の構成
本発明方法によれば、液体金属が液体冷却用液
体として使用され、かかるノズルの受熱を除去す
るため熱交換器を介してポンプ循環される。According to the method of the invention, liquid metal is used as a liquid cooling liquid and is pumped and circulated through a heat exchanger to remove the heat received by such nozzles.
600℃以上の融点を有する液体金属を用いるこ
とが好ましい。冷却液として使用される液体金属
は、冷却ジヤケツトへの流入口での温度が−10℃
〜＋600℃であり、ナトリウム及びカリウム並び
にそれらの合金並びにリチウムまたはリチウム−
鉛合金である。しかし、冷却は冷却ジヤケツトへ
の流入口で400℃またはそれ以上の温度を有する
液体金属によつて高温冷却によつてもよい。 It is preferable to use a liquid metal having a melting point of 600° C. or higher. The liquid metal used as the coolant has a temperature of -10°C at the inlet to the cooling jacket.
~+600°C, sodium and potassium and their alloys and lithium or lithium-
It is a lead alloy. However, the cooling may also be by high temperature cooling with liquid metal having a temperature of 400° C. or more at the inlet to the cooling jacket.
冷却材の循環にはポンプの使用が必要である。
液体金属を冷却材として使用する場合、噴射ノズ
ルの破裂によつて生じる圧力波は鋼金属の爆発的
飛散を招かず、それゆえ前述のように行ない必要
もなく、仮にそうだとしても、酸素噴射ノズルの
冷却ジヤケツトにより液体金属が吸引される。他
方、液体金属はポンプによりジヤケツトを通して
送り込まれてもよく、したがつて、流入量は増
え、冷却は強度に行われる。 Circulating the coolant requires the use of a pump.
When liquid metal is used as a coolant, the pressure wave created by the rupture of the injection nozzle will not lead to explosive dispersion of the steel metal, and therefore there is no need to do so as described above, and even if it were, the oxygen injection nozzle The liquid metal is sucked into the cooling jacket. On the other hand, the liquid metal may be pumped through the jacket, so that the inflow is increased and the cooling is intense.
以下において単に１実施例として示された図面
を参照しつつ、本発明を更に詳しく説明する。図
面は本発明による方法を実施するための酸素噴射
ノズルを有する転炉を示すものである。 The invention will be explained in more detail below with reference to the drawings, which are shown only by way of example. The drawing shows a converter with oxygen injection nozzles for carrying out the method according to the invention.
図面に示す転炉１は通常有する構造のものであ
つて、通常のライニングを有するものである。溶
融金属浴２、スラグ層３及び転炉底面部４中には
冷却ジヤケツト６を備えた酸素噴射ノズル５が存
在する。いくつかの他の気体または溶融物処理剤
の添加が可能である酸素が噴射され、かくして懸
濁化スラグの金属による噴水状のため７のごとき
ものがスラグ面上に形成される。ノズル５の冷却
ジヤケツト６に導入される液体冷却材はポンプに
より熱交換器８を介して循環される液体金属であ
る。図示された実施例中のポンプ９は押上げポン
プであるが、該ポンプは吸上げポンプであつても
よい。熱交換器８はその内部でノズルの受熱を除
去するように設計されている。熱交換器８中の熱
を除去する媒体は例えば水であり、10の位置から
導入され、11の位置から排出される。通常、液体
金属の循環は、ノズル上の液体金属の圧力がノズ
ル上にある金属浴の静水圧よりわずかに高いかあ
るいは低くなるような高さに調整される。 The converter 1 shown in the drawings is of a conventional construction and has a conventional lining. An oxygen injection nozzle 5 with a cooling jacket 6 is present in the molten metal bath 2, the slag bed 3 and the converter bottom 4. Oxygen, with the possible addition of some other gas or melt treatment agent, is injected, thus forming a 7 on the slag surface due to the metal fountaining of the suspended slag. The liquid coolant introduced into the cooling jacket 6 of the nozzle 5 is liquid metal which is circulated through a heat exchanger 8 by means of a pump. Although the pump 9 in the illustrated embodiment is a lift pump, it may also be a suction pump. The heat exchanger 8 is designed to remove the heat received by the nozzle within it. The medium for removing heat in the heat exchanger 8 is, for example, water, which is introduced at position 10 and discharged at position 11. Typically, the circulation of the liquid metal is adjusted to such a height that the pressure of the liquid metal above the nozzle is slightly above or below the hydrostatic pressure of the metal bath above the nozzle.
図は本発明方法を実施する酸素噴射ノズルを備
えた転炉を示す概略断面図である。
１……転炉、２……溶融金属浴、３……スラグ
層、４……転炉底面部、５……酸素噴射ノズル、
６……冷却ジヤケツト、７……金属ため、８……
熱交換器、９……ポンプ。
The figure is a schematic sectional view showing a converter equipped with an oxygen injection nozzle for carrying out the method of the present invention. 1... Converter, 2... Molten metal bath, 3... Slag layer, 4... Converter bottom, 5... Oxygen injection nozzle,
6...Cooling jacket, 7...Metal tank, 8...
Heat exchanger, 9...pump.
Claims (1)
の冶金用容器における銑鉄または鋼の酸素処理用
の、少なくとも１個の冷却液が導通する冷却ジヤ
ケツトを有しかつ600℃以下の温度において加熱
される酸素噴射ノズルの冷却方法において、液体
金属が冷却液として使用され、該液体金属が上記
ノズルの受熱を除去するため熱交換器を介してポ
ンプ循環されることを特徴とする、銑鉄または鋼
の酸素処理における酸素噴射ノズルの冷却方法。 ２ 600℃以上の沸点を有する液体金属を用いる
特許請求の範囲第１項記載の方法。 ３ 液体金属としてナトリウムもしくはカリウム
および／またはそれらの合金を用いる特許請求の
範囲第２項記載の方法。 ４ 液体金属としてリチウムまたはリチウム／鉛
合金を用いる特許請求の範囲第２項記載の方法。 ５ 冷却ジヤケツトへの流入口において、400℃
またはそれ以上の温度を有する液化金属により加
温冷却として冷却する特許請求の範囲第１項記載
の方法。 ６ 液体金属をポンプにより冷却ジヤケツトに通
して移送する特許請求の範囲第１項乃至第５項の
いずれか１項に記載の方法。[Scope of Claims] 1. For the oxygen treatment of pig iron or steel in bottom-blown converters, open hearths, electric furnaces or other metallurgical vessels, having at least one cooling jacket through which a cooling liquid is conducted and at a temperature of 600° C. A method for cooling an oxygen injection nozzle that is heated at a temperature of method for cooling oxygen injection nozzles in oxygen treatment of pig iron or steel. 2. The method according to claim 1, which uses a liquid metal having a boiling point of 600°C or higher. 3. The method according to claim 2, in which sodium or potassium and/or an alloy thereof is used as the liquid metal. 4. The method according to claim 2, in which lithium or a lithium/lead alloy is used as the liquid metal. 5 At the inlet to the cooling jacket, 400℃
2. The method according to claim 1, wherein cooling is carried out by heating and cooling using a liquefied metal having a temperature of 1.0 or higher. 6. A method as claimed in any one of claims 1 to 5, in which the liquid metal is transferred through the cooling jacket by means of a pump.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3541909A DE3541909C1 (en) | 1985-11-27 | 1985-11-27 | Process for cooling oxygen injection nozzles during the oxygen treatment of pig iron or steel |
| DE3541909.1 | 1985-11-27 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62196315A JPS62196315A (en) | 1987-08-29 |
| JPH0137447B2 true JPH0137447B2 (en) | 1989-08-07 |
Family
ID=6286983
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61279897A Granted JPS62196315A (en) | 1985-11-27 | 1986-11-26 | Method for cooling oxygen jet nozzle in oxygen treatment of pig iron or steel |
Country Status (13)
| Country | Link |
|---|---|
| EP (1) | EP0223991A1 (en) |
| JP (1) | JPS62196315A (en) |
| KR (1) | KR870005102A (en) |
| CN (1) | CN86107834A (en) |
| AU (1) | AU6466386A (en) |
| BR (1) | BR8605740A (en) |
| CS (1) | CS262680B2 (en) |
| DD (1) | DD250722A5 (en) |
| DE (1) | DE3541909C1 (en) |
| FI (1) | FI864322A (en) |
| HU (1) | HU195257B (en) |
| PL (1) | PL262478A1 (en) |
| ZA (1) | ZA867898B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0663707B2 (en) * | 1987-08-01 | 1994-08-22 | 川崎重工業株式会社 | Molten metal container tapping device |
| GB9023716D0 (en) * | 1990-10-31 | 1990-12-12 | Whellock John G | Metallurgical apparatus and methods |
| IT1288991B1 (en) * | 1996-09-27 | 1998-09-25 | Danieli Off Mecc | COOLING SYSTEM FOR ELECTRODES FOR ELECTRIC ARC FURNACES IN DIRECT CURRENT |
| WO1999022032A1 (en) * | 1997-10-24 | 1999-05-06 | Mcgill University | Inclined heat pipe lance or tuyere with controllable heat extraction |
| DE10252276C1 (en) * | 2002-11-11 | 2003-10-30 | Rhi Ag Wien | Metallurgical melting apparatus used as an electric furnace comprises a refractory ceramic lining through which extends a nozzle arrangement for introducing a fluid into a molten metal |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE763565C (en) * | 1938-10-11 | 1951-12-20 | Otto Dr-Ing Lellep | Liquid-cooled base for converter |
| DE1103366B (en) * | 1958-01-25 | 1961-03-30 | Steinmueller Gmbh L & C | Process for cooling highly stressed parts in metallurgical or chemical furnaces |
| GB880784A (en) * | 1958-02-12 | 1961-10-25 | Steinmueller Gmbh L & C | Improvements relating to the high-temperature cooling of industrial furnaces |
| US3744780A (en) * | 1972-01-07 | 1973-07-10 | Applied Techn Corp | Method of treating molten material by use of a lance |
-
1985
- 1985-11-27 DE DE3541909A patent/DE3541909C1/en not_active Expired
-
1986
- 1986-10-08 EP EP86113945A patent/EP0223991A1/en not_active Withdrawn
- 1986-10-17 ZA ZA867898A patent/ZA867898B/en unknown
- 1986-10-24 FI FI864322A patent/FI864322A/en not_active Application Discontinuation
- 1986-11-03 AU AU64663/86A patent/AU6466386A/en not_active Abandoned
- 1986-11-05 HU HU864614A patent/HU195257B/en not_active IP Right Cessation
- 1986-11-19 PL PL1986262478A patent/PL262478A1/en unknown
- 1986-11-19 CN CN198686107834A patent/CN86107834A/en active Pending
- 1986-11-20 KR KR860009803A patent/KR870005102A/en not_active Application Discontinuation
- 1986-11-21 DD DD86296527A patent/DD250722A5/en unknown
- 1986-11-21 BR BR8605740A patent/BR8605740A/en unknown
- 1986-11-25 CS CS868615A patent/CS262680B2/en unknown
- 1986-11-26 JP JP61279897A patent/JPS62196315A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| DE3541909C1 (en) | 1987-06-11 |
| KR870005102A (en) | 1987-06-04 |
| AU6466386A (en) | 1987-06-04 |
| JPS62196315A (en) | 1987-08-29 |
| CS861586A2 (en) | 1988-08-16 |
| CS262680B2 (en) | 1989-03-14 |
| EP0223991A1 (en) | 1987-06-03 |
| HU195257B (en) | 1988-04-28 |
| DD250722A5 (en) | 1987-10-21 |
| FI864322A0 (en) | 1986-10-24 |
| FI864322A (en) | 1987-05-28 |
| PL262478A1 (en) | 1987-10-05 |
| CN86107834A (en) | 1987-05-27 |
| HUT43650A (en) | 1987-11-30 |
| ZA867898B (en) | 1987-06-24 |
| BR8605740A (en) | 1987-08-25 |
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