WO1994018348A1 - Procede pour le recyclage de poussieres de depoussierage dans un four electrique a arc de production d'acier - Google Patents
Procede pour le recyclage de poussieres de depoussierage dans un four electrique a arc de production d'acier Download PDFInfo
- Publication number
- WO1994018348A1 WO1994018348A1 PCT/FR1994/000147 FR9400147W WO9418348A1 WO 1994018348 A1 WO1994018348 A1 WO 1994018348A1 FR 9400147 W FR9400147 W FR 9400147W WO 9418348 A1 WO9418348 A1 WO 9418348A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- dust
- steel
- slag
- electric arc
- arc furnace
- 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.)
- Ceased
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
- 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
- C21C5/38—Removal of waste gases or dust
-
- 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
- C21C5/52—Manufacture of steel in electric furnaces
- C21C5/5211—Manufacture of steel in electric furnaces in an alternating current [AC] electric arc furnace
- C21C5/5217—Manufacture of steel in electric furnaces in an alternating current [AC] electric arc furnace equipped with burners or devices for injecting gas, i.e. oxygen, or pulverulent materials into the furnace
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
- C22B7/02—Working-up flue dust
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S75/00—Specialized metallurgical processes, compositions for use therein, consolidated metal powder compositions, and loose metal particulate mixtures
- Y10S75/961—Treating flue dust to obtain metal other than by consolidation
Definitions
- the present invention relates to a method for the recycling of dust removal dust occurring during the production of steel in an electric arc furnace.
- a known process for the production of steel is the process which takes place in an electric arc furnace.
- steel is mainly melted from scrap iron or sponge iron.
- This dust is collected in dust collection devices.
- Dusting dust mainly consists of metal oxides: iron, zinc, calcium, aluminum, lead, bismuth, mercury, cadmium, tin and silicon. Since dedusting dust contains valuable metals, in particular zinc, lead and cadmium in the form of oxides, an effort is made to treat the dedusting dust, for example by means of a mixing process in an oven.
- Patent application DE-A-3,708,730 describes a process for the reuse of dust removal dust which occurs during the production of steel in a converter, which is not an electric arc furnace.
- the dusting dust is injected into the melting vessel with carbon carriers, for example carbon fines, transported by a carrier gas, in particular carbon monoxide or methane.
- carbon carriers for example carbon fines
- a carrier gas in particular carbon monoxide or methane.
- the object of the present invention is to provide a simple and economical process for recycling dust removal dust produced during the production of steel in an electric arc furnace and at the same time improve the foaming of the slag.
- said mixture is injected into the slag or at the interface between the slag and the metal bath, whereby the foaming of the slag is improved.
- the injection is carried out for example using a lance or a nozzle with a carrier gas.
- carbonaceous material materials which are usually used for metallurgical processes can be used, such as coal, coke, coke dust, acetylene coke, lignite, anthracite, graphite, petroleum coke and mixtures based on the carbonaceous materials mentioned above. above.
- fines usually denotes materials having a particle size between 0 and 5 mm.
- the process of the invention has several unforeseen, but advantageous effects. It is surprising that when dusting dust is injected, it is not necessary to increase the quantity of carbonaceous material which is normally used to initiate and maintain the foaming of the slag; this quantity is, for example, in conventional electric arc furnaces of 2 to 20 kg per tonne of steel and in electric arc furnaces with afterburning of 2 to 30 kg per tonne of steel.
- the applicant has observed that, thanks to the introduction of dusting dust, in addition to the fines of carbonaceous material, the degree of efficiency of the slag foaming has increased. This result would be due to the fact that the oxides contained in the dedusting dust serve as an additional source for the formation of carbon monoxides / carbon dioxides, which increases the foaming capacity of the slag.
- the acidity of the slag is not increased, on the contrary one can note an essential gain of iron coming from the dedusting dust, which thus improves the steel yield.
- the zinc contents of the dust removal it is possible to increase the zinc contents of the dust removal to approximately 25 to 30% thus allowing a subsequent economic treatment, and this without having observed undesirable high zinc contents in the steel produced.
- the mixing of dedusting dust with fines of carbonaceous material, before injection into the furnace, can in practice be easily carried out by introducing and mixing the dusting dust and the fines of carbonaceous material stored separately, in a container or a mixing silo and introducing the mixture obtained into a silo from which the mixed material is extracted to be injected into the oven.
- the dusting dust and the fines of carbonaceous material can also be combined just before or during the introduction into the furnace, and the two components are then injected into the melting vessel.
- the injection is carried out, preferably using a lance or a nozzle.
- dedusting dust and fines of carbonaceous material takes place in the slag or at the interface between the slag and the metal bath.
- a mixture containing up to about 70% by volume of dust can be injected, which, taking into account the densities relative components of the mixture, can represent up to about 80% dust by weight.
- we inject into an electric arc furnace with afterburning between 2 and 30 kg of mixture of dust and fines of carbonaceous material per ton of liquid steel this results in a recycling capacity of up to 24 kg of dust per tonne of liquid steel.
- the method of the invention allows a substantial saving, therefore a reduction in production costs.
- the consumption of carbonaceous material is not increased. Better results have been obtained by using in the mixture fines of carbonaceous material having a particularly fine particle size, between 0 and 1 mm.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Metallurgy (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
Description
Claims
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP94906257A EP0635070A1 (fr) | 1993-02-09 | 1994-02-09 | Procede pour le recyclage de poussieres de depoussierage dans un four electrique a arc de production d'acier |
| US08/318,708 US5493580A (en) | 1993-02-09 | 1994-02-09 | Process for recycling the filter dust in an electric arc furnace for producing steel |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEP4303751.8 | 1993-02-09 | ||
| DE19934303751 DE4303751C1 (de) | 1993-02-09 | 1993-02-09 | Verfahren zur Wiederverwertung von Filterstäuben |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| WO1994018348A1 true WO1994018348A1 (fr) | 1994-08-18 |
| WO1994018348B1 WO1994018348B1 (fr) | 1994-10-13 |
Family
ID=6479990
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/FR1994/000147 Ceased WO1994018348A1 (fr) | 1993-02-09 | 1994-02-09 | Procede pour le recyclage de poussieres de depoussierage dans un four electrique a arc de production d'acier |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US5493580A (fr) |
| EP (1) | EP0635070A1 (fr) |
| CA (1) | CA2117758A1 (fr) |
| DE (1) | DE4303751C1 (fr) |
| WO (1) | WO1994018348A1 (fr) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000001852A1 (fr) * | 1998-07-07 | 2000-01-13 | Electricite De France (Service National) | Procede de traitement de laitier et poussieres de four, notamment de four d'acieries electriques |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE69520259T2 (de) * | 1994-12-08 | 2001-08-09 | Daido Tokushuko K.K., Nagoya | Verfahren und Ofen zum Entsorgen von Stahlwerkabfällen sowie Betriebsverfahren für diesen Ofen |
| FR2753205B1 (fr) * | 1996-09-12 | 1998-12-04 | Usinor Sacilor | Procede pour realiser un laitier moussant au-dessus d'un acier inoxydable en fusion dans un four electrique |
| US6173002B1 (en) * | 1999-04-21 | 2001-01-09 | Edgar J. Robert | Electric arc gasifier as a waste processor |
| AT409266B (de) * | 2000-01-28 | 2002-07-25 | Holderbank Financ Glarus | Verfahren zum aufarbeiten von stäuben oder staubgemischen |
| US20030015063A1 (en) * | 2001-07-20 | 2003-01-23 | Mcclintock Willard K. | Steel making material recycling system |
| US6562096B1 (en) * | 2002-02-06 | 2003-05-13 | Heritage Environmental Services, Llc | Management of electric arc furnace dust through a basic oxygen furnace |
| US6562101B1 (en) * | 2002-02-06 | 2003-05-13 | Heritage Environmental Services, Llc | Processing electric arc furnace dust through a basic oxygen furnace |
| DE10207202B9 (de) * | 2002-02-21 | 2006-05-04 | Code Gmbh Commercial Developments | Verfahren zur metallurgischen Verwertung von metallhaltigen Schlämmen und Stäuben |
| GB0211154D0 (en) * | 2002-05-15 | 2002-06-26 | Pope Peter G | Metallurgical slag composition |
| US6831939B2 (en) * | 2002-11-12 | 2004-12-14 | Heritage Environmental Services, Llc | Dual use of an induction furnace to produce hot metal or pig iron while processing iron and volatile metal containing materials |
| US7776126B2 (en) * | 2008-03-14 | 2010-08-17 | Heritage Environmental Services, Llc | Processing parameters for operation of a channel induction furnace |
| US7785389B2 (en) * | 2008-03-14 | 2010-08-31 | Heritage Environmental Services, Llc | Feed material composition and handling in a channel induction furnace |
| US7776127B2 (en) * | 2008-03-14 | 2010-08-17 | Heritage Environmental Services, Llc | Use of a channel induction furnace to process at least one of a molten metal product, a vapor phase metal product and a slag product from a variety of feed materials |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57120634A (en) * | 1981-01-14 | 1982-07-27 | Nakayama Seikosho:Kk | Treatment of electric furnace dust |
| DE3708730A1 (de) * | 1987-03-18 | 1988-09-29 | Kloeckner Stahl Gmbh | Verfahren zum wiedereinsatz von filterstaeuben |
| FR2634787A1 (fr) * | 1988-08-01 | 1990-02-02 | Siderurgie Fse Inst Rech | Procede d'obtention d'un laitier moussant dans un four electrique d'acierie |
| JPH0499231A (ja) * | 1990-08-10 | 1992-03-31 | Hitachi Zosen Corp | 電気炉における酸化亜鉛回収方法および酸化亜鉛回収設備 |
| EP0579591A1 (fr) * | 1992-07-16 | 1994-01-19 | Voest-Alpine Industrieanlagenbau Gmbh | Procédé pour la production d'une fonte d'acier |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3599947A (en) * | 1963-03-01 | 1971-08-17 | Sherwood William L | Apparatus for direct iron and steel making |
| US4147887A (en) * | 1975-08-05 | 1979-04-03 | Ishikawajima-Harima Jukogyo Kabushiki Kaisha | Electric smelting furnace |
| JPS59226130A (ja) * | 1983-05-02 | 1984-12-19 | Mitsubishi Metal Corp | 鉛の連続直接製錬法 |
| US4528035A (en) * | 1984-05-21 | 1985-07-09 | Metro Materials Corporation | Composition and process to create foaming slag cover for molten steel |
| ZA906892B (en) * | 1989-09-04 | 1991-06-26 | Nippon Steel Corp | Method of operating in-bath smelting reduction furnace |
| US5218617A (en) * | 1990-06-01 | 1993-06-08 | Hylsa S.A. De C.V. | Apparatus for feeding iron-bearing materials to metallurgical furnaces |
| FR2683725B1 (fr) * | 1991-11-15 | 1995-07-07 | Pasteur Institut | Composition cellulaire pour le traitement des organismes humains ou animaux. |
-
1993
- 1993-02-09 DE DE19934303751 patent/DE4303751C1/de not_active Revoked
-
1994
- 1994-02-09 EP EP94906257A patent/EP0635070A1/fr not_active Withdrawn
- 1994-02-09 CA CA 2117758 patent/CA2117758A1/fr not_active Abandoned
- 1994-02-09 US US08/318,708 patent/US5493580A/en not_active Expired - Fee Related
- 1994-02-09 WO PCT/FR1994/000147 patent/WO1994018348A1/fr not_active Ceased
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57120634A (en) * | 1981-01-14 | 1982-07-27 | Nakayama Seikosho:Kk | Treatment of electric furnace dust |
| DE3708730A1 (de) * | 1987-03-18 | 1988-09-29 | Kloeckner Stahl Gmbh | Verfahren zum wiedereinsatz von filterstaeuben |
| FR2634787A1 (fr) * | 1988-08-01 | 1990-02-02 | Siderurgie Fse Inst Rech | Procede d'obtention d'un laitier moussant dans un four electrique d'acierie |
| JPH0499231A (ja) * | 1990-08-10 | 1992-03-31 | Hitachi Zosen Corp | 電気炉における酸化亜鉛回収方法および酸化亜鉛回収設備 |
| EP0579591A1 (fr) * | 1992-07-16 | 1994-01-19 | Voest-Alpine Industrieanlagenbau Gmbh | Procédé pour la production d'une fonte d'acier |
Non-Patent Citations (3)
| Title |
|---|
| J.GEISELER , P.DRISSEN: "metallurgische verwertung von stäuben und Schlämmen der Stahlindustrie", STAHL UND EISEN, no. 7, 10 April 1989 (1989-04-10), pages 359 - 365 * |
| PATENT ABSTRACTS OF JAPAN vol. 16, no. 334 (C - 0964) 21 July 1992 (1992-07-21) * |
| PATENT ABSTRACTS OF JAPAN vol. 6, no. 214 (C - 131) 27 October 1982 (1982-10-27) * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000001852A1 (fr) * | 1998-07-07 | 2000-01-13 | Electricite De France (Service National) | Procede de traitement de laitier et poussieres de four, notamment de four d'acieries electriques |
Also Published As
| Publication number | Publication date |
|---|---|
| US5493580A (en) | 1996-02-20 |
| DE4303751C1 (de) | 1994-09-08 |
| EP0635070A1 (fr) | 1995-01-25 |
| CA2117758A1 (fr) | 1994-08-10 |
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