EP1541699A1 - Verfahren zum mischen von stahl - Google Patents
Verfahren zum mischen von stahl Download PDFInfo
- Publication number
- EP1541699A1 EP1541699A1 EP02768214A EP02768214A EP1541699A1 EP 1541699 A1 EP1541699 A1 EP 1541699A1 EP 02768214 A EP02768214 A EP 02768214A EP 02768214 A EP02768214 A EP 02768214A EP 1541699 A1 EP1541699 A1 EP 1541699A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- gas
- pan
- steel
- metal
- blowing
- 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.)
- Granted
Links
Images
Classifications
-
- 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
- F27D27/00—Stirring devices for molten material
-
- 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
-
- 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
- C21C1/00—Refining of pig-iron; Cast iron
- C21C1/06—Constructional features of mixers for pig-iron
-
- 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
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/0075—Treating in a ladle furnace, e.g. up-/reheating of molten steel within the ladle
-
- 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
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/072—Treatment with gases
-
- 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
- F27D3/00—Charging; Discharging; Manipulation of charge
- F27D3/16—Introducing a fluid jet or current into the charge
-
- 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
- F27D3/00—Charging; Discharging; Manipulation of charge
- F27D3/18—Charging particulate material using a fluid carrier
-
- 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
- F27D27/00—Stirring devices for molten material
- F27D2027/002—Gas stirring
Definitions
- the invention relates to methods for the treatment of liquid metal in a pan outside the furnace in black metallurgy.
- the intensification of the stirring process of the metal which is a reduction
- the steelworking time has an important meaning in the process treating metal outside the oven in a pan.
- the Homogenization of the melt accelerates the processes of calming and the disposal of non-metallic inclusions, as well as desulphurisation and Dephosphorization of the steel, which is the achievement of the objectives of ladle metallurgy guaranteed.
- a method for intensifying the stirring of metal in a pan by increasing the gas flow rate for blowing leads the gas through a blow mold of the type "hollow Stopper rod "and to avoid splashing of metal at elevated Gas supply is used a disc-shaped front part (screen) on the Stopper rod (see, e.g., Stahl, No. 12, 1999, pp. 17-19).
- the main disadvantage of the method is the attempt to complete the task of Intensify the stirring of the metal by increasing the gas supply to solve. Moreover, in this case, most of the metal in the pan is not from the stirring comprises, in particular not in their soil zones. All in all reduces the above mentioned the effectiveness of the known method in the Solution of the task.
- the main drawback of this process is the high cost of used equipment with a relatively low stirring effect.
- a gas or gas-powder mixture through arranged in the lower part of the molten bath Blowing devices, of which at least one is offset from the middle of the pan.
- the supply of Gas or gas-powder mixture through special plugs in the bottom of the pan is preferred, its implementation concludes the supply of the specified Components by a submerged tuyere (tuyeres) is not enough.
- the known method has a significant disadvantage: in the course of Blowing the steel by means of the gas / gas powder mixture is the Metal stirred unevenly over the pan volume. Especially the im Entry path of the gas / gas powder mixture in the steel areas (most active zone) of the liquid metal become an intense stirring motion subjected. When approaching the gas / gas powder mixture to the Surface of the metal in the pan widen these areas, flow through (reducing speed) the upper layers of the Melting bath and sink from the surface as weakened descending Streams down. Of course, this portrayed image reduces that Movement of stirred metal efficiency of stirring of steel because it the entire volume of metal in the pan and especially the bottom zones of the Melting bath detected very slowly. Altogether the posed task of the Acceleration of the homogenization of the metal composition is not achieved.
- the known process requires increased use of gas and in particular in time, which in the current technological manufacturing process of steel in the essential is not sufficiently available.
- the inventive method for stirring metal in a pan does not have the mentioned disadvantages.
- the active zone the detection of the metal volume by the gas / gas powder mixture significantly widened. This leads to the reduction of the time to reach a homogenized metal composition without increasing the supplied Amount of gas, i. the technical task of intensifying the stirring of steel in a pan by blowing a gas / gas powder mixture solved.
- a method of stirring steel in a pan comprising blowing of the steel from below by means of a gas / gas powder mixture through at least two provided blowing devices, which are diametrically are arranged opposite sides of the pan, according to the invention the blowing through alternately first by one of the blowing devices, the on one side of the pan, and then the other Blowing device, which is located on the other side of the pan, takes place.
- the blowing device which does not blow through at the moment, a pressure which precludes the inflow of metal into this device.
- the Period of the operation change between the blowing devices is increased with the increase in steel mass in the pan.
- the volume of the supplied Gas is at the switching of the supply of gas or gas-powder mixture from one blowing device to the other left unchanged.
- a pan is shown with metal, in the two Blowing devices are provided as a plug in the pan bottom.
- Fig. 2 is an analogue pan with two blowing devices in the form of tuyeres shown.
- Fig. 3 the view in the direction of arrow A gem.
- Fig. 1 shown.
- Fig. 4 shows the view in the direction of arrow A gem.
- the pan has at least two blowing devices.
- the ladle 1 is filled with the liquid steel 2. in the The bottom of the ladle (Fig. 1) are on diametrically opposite sides of the pan 1 (Fig. 3) at least two blowing devices 3 are provided. The number of these Devices can be higher, but must be straight. In the pan 1 can on blow molds 4 arranged diametrically opposite sides of the pan 1 be provided. The number of blow molds may be higher but must be even.
- the Gas or gas powder mixture 5 is the pan by plugging in each case Pan base (Fig. 1) or tuyeres 4 (Fig. 2). The gas or the Gas-powder mixture can be fed to the pan separately. In this Case increases the number of devices 3 (blow molding 4) to the next even number. In Fig.
- the method of stirring steel in a pan is as follows carried out.
- the steel 2 is poured.
- the for the doping, Desulfurization and dephosphorization of the steel necessary elements become by known methods or as a powder by the described Devices 3 (or 4), or by both methods simultaneously in the steel introduced.
- the result is formed in the Melt the main currents, which are represented by the lines 6.
- the stopper 3 (in the tuyere 4) on the opposite Side of the pan held a gas pressure, which is the inflow of steel into these excludes.
- the direction of the Main flows of the metal in the pan bath by supply of the gas (gas-powder mixture) 5 through the plug 3 (blow mold 4), on the opposite Side of the pan is arranged (in Fig.
- a "cold model" of a pan 1 had the one shown in Fig. 1 Dimensions.
- the pan was tap water 2 up to the height of 430 mm filled.
- the pan was equipped with three platinum electrodes: one in the bottom Part of the pan (distance from the water level 370 mm), one in the middle part of the Pan (distance from the water level 220 mm) and one in the upper part of the pan (Distance from the water level 60 mm), the advance in the areas tap water - 0.1 wt.% Aqueous KCl solution were calibrated. All three electrodes were 55 mm away from the inner wall of the pan model. There was also one portable electrode provided with the addition of the homogenization of the Solution in the centers of the pan model, in the bottom part, at the Water surface, as well as in the joints of the floor and the walls of the pan was evaluated.
- a 20% KCI concentrate was prepared and in a thin Rubber balloon on the bottom of the pan model in the area near the Pan wall, which was located 90 ° from the devices 3, lowered. Of the Balloon was cut up. It was by the 20% KCl concentrate after its uniform distribution over the body of water a concentration of 0, 1% KCl set in the water, on which the electrodes were calibrated. The Use of the balloon has a minimal disruptive effect on the balloon Water bath guaranteed.
- the gas (air) was absorbed by the devices in the soil in an amount supplied from 6 l / min.
- Example 1 Under the conditions given in Example 1 was a alternating air supply with a period of 30 sec. performed. In which Change in direction was the amount of air supplied at 6 l / min. held. After 35 min, the pan model became a homogeneous solution with the above Receive concentration, i. the stirring time was 2.4 times compared to Example 1 reduced.
- Example 1 Under the conditions given in Examples 1 and 2 was a alternating air supply with a period of 20 sec. performed. To 60 min. was in the pan a homogeneous solution with the above concentration obtained, i. the stirring time was reduced 1.4 times compared to Example 1. At the end of the 60-minute stirring, there were zones in the water volume larger and smaller concentrations than 0.1% KCl detected in water were not registered by the main electrodes.
- Example 1 Under the conditions given in Examples 1 and 2 was a alternating air supply with a period of 10 sec. performed. After 84 - 87 min. was in the pan a homogeneous solution with the above concentration obtained, i. the stirring time became practical in comparison with Example 1 maintained. At the end of the stirring were in the water volume zones with larger and smaller concentrations than 0, 1% KCl detected in water, the were not registered by the main electrodes.
- Example 1 Under the conditions given in Examples 1 and 2 was a alternating air supply with a period of 40 sec. performed. To 55 min. was in the pan a homogeneous solution with the above concentration obtained, i. the stirring time was reduced 1.5 times compared to Example 1. The water volume lacked zones with a KCI concentration that differed from the Concentration of 0.1 wt.% KCl difference.
- Example 1 Under the conditions given in Examples 1 and 2 was a alternating air supply with a period of 50 sec. performed. To 60 min. was in the pan a homogeneous solution with the above concentration obtained, i. the stirring time was reduced 1.4 times compared to Example 1. The water volume lacked zones with a KCI concentration that differed from the Concentration of 0.1 wt.% KCI distinguished.
- the inventive method for stirring steel in a pan allows a substantial intensification by a simple process management the stirring of the steel (a reduction in the time to carry out) without a loss of stirring quality.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- General Engineering & Computer Science (AREA)
- Treatment Of Steel In Its Molten State (AREA)
- Mixers Of The Rotary Stirring Type (AREA)
- Paper (AREA)
- Furnace Details (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
Description
Claims (3)
- Verfahren zum Rühren von Stahl in einer Pfanne, umfassend das Durchblasen des Stahls von unten mittels eines Gases oder Gas-Pulver-Gemisches durch mindestens zwei vorgesehene Blasvorrichtungen, die auf diametral entgegengesetzten Seiten der Pfanne angeordnet sind, dadurch gekennzeichnet, dass das Durchblasen abwechselnd zuerst durch eine der Blasvorrichtungen, die auf einer Seite der Pfanne angeordnet ist, und danach durch die andere Blasvorrichtung, die sich auf der anderen Seite der Pfanne befindet, erfolgt, wobei man in der Blasvorrichtung, durch die momentan nicht durchgeblasen wird, einen Druck hält, der das Einfließen von Metall in diese Vorrichtung ausschließt.
- Verfahren zum Rühren von Stahl in einer Pfanne nach Anspruch 1, dadurch gekennzeichnet, dass die Periode des Betriebswechsels der Blasvorrichtungen mit Vergrößerung der Stahlmasse in der Pfanne erhöht wird.
- Verfahren zum Rühren von Stahl in einer Pfanne nach Anspruch 1, dadurch gekennzeichnet, dass das Volumen des zugeführten Gases bei der Umschaltung der Zufuhr des Gases oder Gas-Pulver-Gemisches von einer Blasvorrichtung auf die andere unverändert belassen wird.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
RU2002108332 | 2002-04-03 | ||
RU2002108332/02A RU2208054C1 (ru) | 2002-04-03 | 2002-04-03 | Способ перемешивания стали в ковше |
PCT/RU2002/000400 WO2003083145A1 (fr) | 2002-04-03 | 2002-08-29 | Procede de melangeage de l'acier dans la poche de coulee |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1541699A1 true EP1541699A1 (de) | 2005-06-15 |
EP1541699A4 EP1541699A4 (de) | 2005-09-21 |
EP1541699B1 EP1541699B1 (de) | 2009-01-21 |
Family
ID=28673171
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02768214A Expired - Lifetime EP1541699B1 (de) | 2002-04-03 | 2002-08-29 | Verfahren zum rühren von stahl |
Country Status (8)
Country | Link |
---|---|
EP (1) | EP1541699B1 (de) |
AT (1) | ATE421598T1 (de) |
AU (1) | AU2002332367A1 (de) |
DE (1) | DE50213248D1 (de) |
ES (1) | ES2321071T3 (de) |
RU (1) | RU2208054C1 (de) |
UA (1) | UA77545C2 (de) |
WO (1) | WO2003083145A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1750075A1 (de) * | 2005-08-05 | 2007-02-07 | Vesuvius Becker & Piscantor Grossalmeroder Schmelztiegelwerke GmbH & Co. KG | Tiegel zur Behandlung von flüssigem Metall und Verfahren zu dessen Herstellung |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2910651A1 (de) * | 2014-02-19 | 2015-08-26 | Siemens VAI Metals Technologies GmbH | Verfahren zum Umwälzen eines Metallbades und Ofenanlage |
RU2653743C1 (ru) * | 2017-03-20 | 2018-05-14 | Публичное акционерное общество "Северсталь" (ПАО "Северсталь") | Способ перемешивания стали в металлургическом агрегате |
CN111822665B (zh) * | 2020-07-25 | 2021-12-21 | 莱芜钢铁集团银山型钢有限公司 | 一种用于连铸中间包透气上水口座砖的吹氩控制方法及氩气控制装置 |
CN115475933B (zh) * | 2022-10-13 | 2024-04-26 | 莱芜钢铁集团银山型钢有限公司 | 一种板坯连铸机水口吹氩密封的保护方法 |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1492953A (en) * | 1974-08-14 | 1977-11-23 | Inland Steel Co | Leaded steel bar |
JPH06235018A (ja) * | 1993-02-09 | 1994-08-23 | Kawasaki Steel Corp | 取鍋精錬における底吹きガス制御方法 |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE786018A (fr) * | 1971-07-09 | 1973-01-08 | Allegheny Ludlum Ind Inc | Procede d'injection d'un gaz reactif dans un bain de metal fondu |
SU1024509A1 (ru) * | 1981-12-23 | 1983-06-23 | Днепродзержинский Ордена Трудового Красного Знамени Индустриальный Институт Им.М.И.Арсеничева | Способ передела чугуна в конвертере |
RU2023017C1 (ru) * | 1992-03-11 | 1994-11-15 | Пак Юрий Алексеевич | Устройство для десульфурации шлакового расплава |
RU2132394C1 (ru) * | 1998-06-02 | 1999-06-27 | Открытое акционерное общество "Северсталь" | Способ выплавки стали в дуговой сталеплавильной печи |
CN1087034C (zh) * | 1999-11-02 | 2002-07-03 | 北京科技大学 | 盛钢桶浸渍罩密闭钢液喷粉脱硫方法及装置 |
-
2002
- 2002-04-03 RU RU2002108332/02A patent/RU2208054C1/ru not_active IP Right Cessation
- 2002-08-29 AT AT02768214T patent/ATE421598T1/de active
- 2002-08-29 ES ES02768214T patent/ES2321071T3/es not_active Expired - Lifetime
- 2002-08-29 UA UA20041210939A patent/UA77545C2/uk unknown
- 2002-08-29 DE DE50213248T patent/DE50213248D1/de not_active Expired - Lifetime
- 2002-08-29 AU AU2002332367A patent/AU2002332367A1/en not_active Abandoned
- 2002-08-29 EP EP02768214A patent/EP1541699B1/de not_active Expired - Lifetime
- 2002-08-29 WO PCT/RU2002/000400 patent/WO2003083145A1/ru not_active Application Discontinuation
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1492953A (en) * | 1974-08-14 | 1977-11-23 | Inland Steel Co | Leaded steel bar |
JPH06235018A (ja) * | 1993-02-09 | 1994-08-23 | Kawasaki Steel Corp | 取鍋精錬における底吹きガス制御方法 |
Non-Patent Citations (2)
Title |
---|
PATENT ABSTRACTS OF JAPAN Bd. 018, Nr. 615 (C-1277), 24. November 1994 (1994-11-24) & JP 06 235018 A (KAWASAKI STEEL CORP), 23. August 1994 (1994-08-23) * |
See also references of WO03083145A1 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1750075A1 (de) * | 2005-08-05 | 2007-02-07 | Vesuvius Becker & Piscantor Grossalmeroder Schmelztiegelwerke GmbH & Co. KG | Tiegel zur Behandlung von flüssigem Metall und Verfahren zu dessen Herstellung |
Also Published As
Publication number | Publication date |
---|---|
EP1541699B1 (de) | 2009-01-21 |
EP1541699A4 (de) | 2005-09-21 |
AU2002332367A1 (en) | 2003-10-13 |
ES2321071T3 (es) | 2009-06-02 |
WO2003083145A1 (fr) | 2003-10-09 |
UA77545C2 (en) | 2006-12-15 |
DE50213248D1 (de) | 2009-03-12 |
RU2208054C1 (ru) | 2003-07-10 |
ATE421598T1 (de) | 2009-02-15 |
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