WO1998041658A1 - Verfahren zum einbringen von körnigen feststoffen in metallschmelzen - Google Patents
Verfahren zum einbringen von körnigen feststoffen in metallschmelzen Download PDFInfo
- Publication number
- WO1998041658A1 WO1998041658A1 PCT/EP1997/001329 EP9701329W WO9841658A1 WO 1998041658 A1 WO1998041658 A1 WO 1998041658A1 EP 9701329 W EP9701329 W EP 9701329W WO 9841658 A1 WO9841658 A1 WO 9841658A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- solids
- tapping
- blown
- inflated
- granular solids
- Prior art date
Links
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
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/0037—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00 by injecting powdered material
- C21C7/0043—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00 by injecting powdered material into the falling stream of molten metal
Definitions
- the invention relates to a method by means of the use of which there are solids which are added in different quantities for setting the analysis in metal production, in particular steel production, outside the actual metal production process, in a simple manner with high accuracy in the analysis and high output without the use of expensive aids such as refractory delivered lances or spooling machines of the metal melts can be supplied.
- the addition methods mentioned under a) and b) are characterized by a not exactly predictable, comparatively low output and insufficient accuracy, which results in the need for higher consumption of alloying agents and, relatively often, a one or more correction of the addition quantity. If the addition is carried out by hand, additional expenditure on personnel is necessary, at the same time the degree of reproducibility of the analysis results is then comparatively lower.
- the blowing process is also characterized by a complex, labor-intensive lance economy.
- the object of the invention is to develop a method of the type mentioned in such a way that it can be used to pour bulk materials which are capable of freezing and which are used in metal production, in particular steel production, following the actual melting process in the converter or in the electric arc furnace to correct the analysis of the Metal must be added in a suitable form, in a simple manner be added to the liquid metal in such a way that a high utilization is achieved as a ratio of the amount absorbed by the metal to the amount added without the use of costly auxiliary devices such as refractory supplied lances, lance driving devices, winding machines and avoiding the use of cored wires.
- blowing device is spaced from the melt and that the solids are blown into the turbulent areas of the melt in a gas-poor manner according to the principle of the dense phase flow, such as in the tapping jet of a converter or electric arc furnace used for steel production during the tapping or in the Impingement area of the tapping beam of a converter or an electric arc furnace in the ladle or during the ladle metallurgical treatment following the melting process in the area of the rinsing spot during the rinsing treatment are blown onto the bath surface.
- Free-flowing bulk goods such as are usually used in metal production for analysis, are, for example, carbon carriers for carburizing, lead, aluminum, sulfur, ferro-alloys, etc.
- a prerequisite for using the method according to the invention is that these materials are in granular, blow-in form.
- the grain size is variable within certain limits; however, for reasons of rapid dissolution of the materials in the metal, it should, if possible, be less than 3 mm in diameter.
- the bulk goods are blown in by means of a pneumatically operating blowing system, e.g. B. according to EP 0 164 436.
- the size of the pressure vessel of the transmitter essentially depends on the size of the generating unit and, associated therewith, on the amount of material to be injected per treatment. Usually a pressure vessel with a capacity of 1,000 to 2,000 liters is used.
- the bulk goods to be blown in can be transported either via a closed system in silo trucks and storage silos on site, via big bags, sacks or smaller transport containers with a capacity of 1,000 or 1,500 liters.
- One or more intermediate vessels are usually provided as day bunkers above the pressure vessel in order to ensure that the injector is filled quickly after the end of treatment.
- the method according to the invention also provides for the simultaneous or sequential addition of several different materials in the course of a treatment.
- the filling process and the subsequent pressure build-up in the injector are carried out automatically so that the injector is ready for delivery again within a very short time.
- the location and the time of the addition can be either the bundled tapping jet 3 of the liquid metal during tapping, the impact area 9 of the metal during tapping in the pan 4 or the flushing spot 6 on the bath surface 5 during the pan treatment.
- blowing lances 7, 8 are positioned by means of a moving device during the blowing process in such a way that the same boundary conditions as the distance to the bath surface, position on the bath surface, angle of inclination, etc. can always be maintained.
- the method provides for the use of existing measurement methods, for example based on laser measurement, ultrasound measurements, etc.
- the solid jet in a bundled form either meets the tapping jet 3, the target area 9 of the tapping jet in the pan or the washing stain 6 during treatment in the pan; the bundling of the solid stream is also maintained at a distance of up to one meter from the end of the lance.
- the necessary distance of the lances 7, 8 from the liquid metal can be maintained in order to protect the lances 7, 8 from wear; on the other hand, the necessary precise work in the area of the tapping jet 3 or the flushing spot 6 is only necessary as a prerequisite for a high application rate.
- dense phase conveying also makes it possible to work with the smallest possible amounts of conveying gases.
- the process envisages the use of all gases known in the field of the metal-producing industry, such as argon, nitrogen, air or even carbonic acid.
- the advantages of the new method are that the costs for the transport gas are kept low because of the dense phase flow, for example when using argon; If nitrogen is used, the low transport gas quantities and the high delivery rate ensure that that there is no significant influence on the metal quality by changing the nitrogen contents of the liquid melt.
- the rate of absorption of the liquid metal for the inflated solids does not only depend on the pure dissolving power of the melt for e.g. B. carbon or silicon, but is still significantly enhanced by the mechanical effect (impulse) of the impinging solid jet in the area of the rinsing spot in cooperation with the circulation effect.
- the distribution of the inflated solid and thus the concentration equalization takes place through the circulation effect of the flushing gas 10 introduced via the floor.
- the homogeneity of the melt is thus ensured on the one hand by means of targeted and controlled inflation and on the other hand by the interaction of the blowing impulse and the circulation effect.
- the entrainment effect of the bundled metal jet ensures that even large quantities inflated per unit of time are transported into the melted amount already underneath in the pan.
- the angle at which the solid jet hits the tapping jet should be between 10 and 80 °.
- the method according to the invention provides for the computer-controlled coupling of the movement of the blowing lance with the tilting movement of the converter or of the electric arc furnace 1 in order to ensure that the tapping jet 3 and blowing jet meet one another centrally, provided that the solids are to be blown into the tapping jet.
- the blowing lance must be raised in accordance with the rise in the bath level. This process can be checked by coupling the corresponding control element on the lance traversing device to the weighing system of the ladle truck or other measuring systems for weight detection. A measurement of the bath level in the pan is also provided in the manner described above.
- the applications relate to the inflation of a fine-grained carbon carrier with approx. 88% C into the sink area of a ladle with a tapping weight of 180 t. This shows that feed rates of up to 300 kg / min carbon carriers with good utilization are problem-free - here as a spread in relation to the increase in carbon contents - to be realized.
- the distance between the blowing lance and the surface of the bath can also be varied within a wide range; High utilization is ensured even at a distance of up to one meter from the bathroom surface.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Treatment Of Steel In Its Molten State (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Furnace Charging Or Discharging (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
Description
Claims
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA002283903A CA2283903C (en) | 1997-03-17 | 1997-03-17 | Method for feeding granular solids into metal melts |
PCT/EP1997/001329 WO1998041658A1 (de) | 1997-03-17 | 1997-03-17 | Verfahren zum einbringen von körnigen feststoffen in metallschmelzen |
ES97916364T ES2174245T3 (es) | 1997-03-17 | 1997-03-17 | Metodo para aportar sustancias solidas granuladas a baños de metal fundido. |
AT97916364T ATE217354T1 (de) | 1997-03-17 | 1997-03-17 | Verfahren zum einbringen von körnigen feststoffen in metallschmelzen |
DE59707243T DE59707243D1 (de) | 1997-03-17 | 1997-03-17 | Verfahren zum einbringen von körnigen feststoffen in metallschmelzen |
EP97916364A EP0968312B1 (de) | 1997-03-17 | 1997-03-17 | Verfahren zum einbringen von körnigen feststoffen in metallschmelzen |
US09/381,440 US6379415B1 (en) | 1995-09-21 | 1997-03-17 | Method for feeding granular solids into metal melts |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/EP1997/001329 WO1998041658A1 (de) | 1997-03-17 | 1997-03-17 | Verfahren zum einbringen von körnigen feststoffen in metallschmelzen |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1998041658A1 true WO1998041658A1 (de) | 1998-09-24 |
Family
ID=8166553
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP1997/001329 WO1998041658A1 (de) | 1995-09-21 | 1997-03-17 | Verfahren zum einbringen von körnigen feststoffen in metallschmelzen |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP0968312B1 (de) |
AT (1) | ATE217354T1 (de) |
CA (1) | CA2283903C (de) |
DE (1) | DE59707243D1 (de) |
ES (1) | ES2174245T3 (de) |
WO (1) | WO1998041658A1 (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2008002176A1 (fr) * | 2006-06-30 | 2008-01-03 | Techcom Gmbh | Procédé de réduction d'acier dans la poche |
DE102015113241A1 (de) | 2015-08-11 | 2017-02-16 | Rhm Rohstoff-Handelsgesellschaft Mbh | Verfahren zum Einbringen von Zuschlagstoffen in Metallschmelzen |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2408363A1 (de) * | 1973-04-11 | 1974-10-24 | Fischer Ag Georg | Verfahren und einrichtung zum einbringen eines zuschlagstoffes in eine fluessige metallschmelze |
JPS5542122A (en) * | 1978-09-18 | 1980-03-25 | Kawasaki Steel Corp | Addition adding method at receiving of molten metal in ladle |
JPS57110610A (en) * | 1980-12-27 | 1982-07-09 | Kawasaki Steel Corp | Method for additing additive into molten steel |
US4863684A (en) * | 1989-01-13 | 1989-09-05 | Inland Steel Company | Method and apparatus for adding shot to molten steel |
DE19535014A1 (de) * | 1995-09-21 | 1997-03-27 | Stein Ind Anlagen Inh Christel | Verfahren zum Einbringen von körnigen Feststoffen in Metallschmelzen |
-
1997
- 1997-03-17 WO PCT/EP1997/001329 patent/WO1998041658A1/de active IP Right Grant
- 1997-03-17 EP EP97916364A patent/EP0968312B1/de not_active Expired - Lifetime
- 1997-03-17 DE DE59707243T patent/DE59707243D1/de not_active Expired - Lifetime
- 1997-03-17 AT AT97916364T patent/ATE217354T1/de not_active IP Right Cessation
- 1997-03-17 CA CA002283903A patent/CA2283903C/en not_active Expired - Fee Related
- 1997-03-17 ES ES97916364T patent/ES2174245T3/es not_active Expired - Lifetime
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2408363A1 (de) * | 1973-04-11 | 1974-10-24 | Fischer Ag Georg | Verfahren und einrichtung zum einbringen eines zuschlagstoffes in eine fluessige metallschmelze |
JPS5542122A (en) * | 1978-09-18 | 1980-03-25 | Kawasaki Steel Corp | Addition adding method at receiving of molten metal in ladle |
JPS57110610A (en) * | 1980-12-27 | 1982-07-09 | Kawasaki Steel Corp | Method for additing additive into molten steel |
US4863684A (en) * | 1989-01-13 | 1989-09-05 | Inland Steel Company | Method and apparatus for adding shot to molten steel |
DE19535014A1 (de) * | 1995-09-21 | 1997-03-27 | Stein Ind Anlagen Inh Christel | Verfahren zum Einbringen von körnigen Feststoffen in Metallschmelzen |
Non-Patent Citations (4)
Title |
---|
K.SCHEIDIG ET AL.: "Betriebserfahrungen mit einer neuen Generation von Anlagen zum Kohlenstaubeinblasen in den Hochofen", STAHL UND EISEN., vol. 105, no. 25/26, 16 December 1985 (1985-12-16), DUSSELDORF DE, pages 1437 - 1441, XP002048156 * |
PATENT ABSTRACTS OF JAPAN vol. 004, no. 084 (M - 016) 17 June 1980 (1980-06-17) * |
PATENT ABSTRACTS OF JAPAN vol. 006, no. 202 (C - 129) 13 October 1982 (1982-10-13) * |
S.KRAUSS: "Verfahren zur Pulverinjektion in Stahlschmelzen", NEUE HUTTE., vol. 24, no. 6, June 1979 (1979-06-01), LEIPZIG DE, pages 217 - 222, XP002048157 * |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2008002176A1 (fr) * | 2006-06-30 | 2008-01-03 | Techcom Gmbh | Procédé de réduction d'acier dans la poche |
EA014276B1 (ru) * | 2006-06-30 | 2010-10-29 | Техком Гмбх | Способ раскисления стали в ковше |
DE102015113241A1 (de) | 2015-08-11 | 2017-02-16 | Rhm Rohstoff-Handelsgesellschaft Mbh | Verfahren zum Einbringen von Zuschlagstoffen in Metallschmelzen |
Also Published As
Publication number | Publication date |
---|---|
EP0968312A1 (de) | 2000-01-05 |
CA2283903C (en) | 2007-01-02 |
ATE217354T1 (de) | 2002-05-15 |
ES2174245T3 (es) | 2002-11-01 |
DE59707243D1 (de) | 2002-06-13 |
EP0968312B1 (de) | 2002-05-08 |
CA2283903A1 (en) | 1998-09-24 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
AT503909B1 (de) | Vorrichtung zum chargieren von materialien in eine metallurgische anlage | |
DE2408363A1 (de) | Verfahren und einrichtung zum einbringen eines zuschlagstoffes in eine fluessige metallschmelze | |
DE19535014C2 (de) | Verfahren zum Einbringen von körnigen Feststoffen in Metallschmelzen | |
US3224051A (en) | Method of introducing addition agent into a melt | |
DE2807527C3 (de) | Verfahren zum Impfen oder Veredeln von Metallschmelzen | |
EP0600236A1 (de) | Mittel zur Behandlung von Metallschmelzen | |
DE60132358T2 (de) | Sauerstoffblasverfahren und aufwärtsblasende lanze für sauerstoffblaskonverter | |
EP0968312B1 (de) | Verfahren zum einbringen von körnigen feststoffen in metallschmelzen | |
DE3041467A1 (en) | Method of torch gunite of linings of metallurgical installations | |
EP0340711B1 (de) | Verfahren und Vorrichtung zur Zugabe von Legierungsmitteln in einen Metallgiessstrahl | |
DE1583962A1 (de) | Verfahren und Vorrichtung zur Einfuehrung eines fein verteilten Zuschlages in geschmolzenen Stahl | |
EP1183397B1 (de) | Verfahren und vorrichtung zum abstechen von metallschmelzen aus metallurgischen schmelzgefässen | |
EP1068364B1 (de) | Verfahren zum legieren von stählen und vorrichtung zur durchführung des verfahrens | |
US3275244A (en) | Apparatus for introducing addition agent into a melt | |
DE2632707B2 (de) | Beschickungsanlage an Elektro-Iichtbogenöfen zur Zugabe von Legierungsmitteln und Zuschlagstoffen | |
DE3883993T2 (de) | Vorrichtung und verfahren zur vorbehandlung von geschmolzenem metall. | |
DE3508620C2 (de) | ||
DE8816829U1 (de) | Mittel zur Entschwefelung von Eisenschmelzen | |
DE2801926A1 (de) | Verfahren und einrichtung zum einfuehren von zusaetzen in metallschmelzen | |
DE2030221C3 (de) | Verfahren zur Desoxydation von unberuhigtem Stahl | |
SU785365A1 (ru) | Устройство дл обработки стали | |
DE19860173C2 (de) | Verfahren und Vorrichtung zum Legieren von Stählen | |
EP0274557B1 (de) | Vorrichtung zum Einbringen von pulverförmigen Reagenzien in eine Schmelzpfanne | |
DE4218698C3 (de) | Verfahren zum Abgießen einer metallurgischen Schmelze und entsprechendes metallurgisches Gefäß | |
DE1909780A1 (de) | Verfahren zum Senken der Sauerstoff- und Wasserstoffgehalte in kohlenstoffarmen Staehlen |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): CA US |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): AT BE CH DE DK ES FI FR GB GR IE IT LU MC NL PT SE |
|
DFPE | Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101) | ||
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
WWE | Wipo information: entry into national phase |
Ref document number: 1997916364 Country of ref document: EP |
|
ENP | Entry into the national phase |
Ref document number: 2283903 Country of ref document: CA Ref country code: CA Ref document number: 2283903 Kind code of ref document: A Format of ref document f/p: F |
|
WWE | Wipo information: entry into national phase |
Ref document number: 09381440 Country of ref document: US |
|
WWP | Wipo information: published in national office |
Ref document number: 1997916364 Country of ref document: EP |
|
WWG | Wipo information: grant in national office |
Ref document number: 1997916364 Country of ref document: EP |