ZA200608705B - Method and device for producing liquid steel - Google Patents
Method and device for producing liquid steel Download PDFInfo
- Publication number
- ZA200608705B ZA200608705B ZA200608705A ZA200608705A ZA200608705B ZA 200608705 B ZA200608705 B ZA 200608705B ZA 200608705 A ZA200608705 A ZA 200608705A ZA 200608705 A ZA200608705 A ZA 200608705A ZA 200608705 B ZA200608705 B ZA 200608705B
- Authority
- ZA
- South Africa
- Prior art keywords
- vessel
- overheating
- melting
- way
- melting vessel
- Prior art date
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 32
- 239000010959 steel Substances 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims abstract description 20
- 239000007788 liquid Substances 0.000 title claims abstract description 18
- 238000002844 melting Methods 0.000 claims abstract description 68
- 230000008018 melting Effects 0.000 claims abstract description 68
- 238000013021 overheating Methods 0.000 claims abstract description 55
- 238000010079 rubber tapping Methods 0.000 claims abstract description 9
- 238000010891 electric arc Methods 0.000 claims description 15
- 239000000969 carrier Substances 0.000 claims description 13
- 239000004020 conductor Substances 0.000 claims description 13
- 239000000155 melt Substances 0.000 claims description 11
- 238000009847 ladle furnace Methods 0.000 claims description 9
- 230000003647 oxidation Effects 0.000 claims description 9
- 238000007254 oxidation reaction Methods 0.000 claims description 9
- 238000002485 combustion reaction Methods 0.000 claims description 8
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 7
- 239000000126 substance Substances 0.000 claims description 5
- 230000015572 biosynthetic process Effects 0.000 claims description 4
- 239000003345 natural gas Substances 0.000 claims description 4
- 238000011144 upstream manufacturing Methods 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 239000003923 scrap metal Substances 0.000 claims description 3
- 239000002801 charged material Substances 0.000 claims description 2
- 238000005259 measurement Methods 0.000 claims description 2
- 239000012768 molten material Substances 0.000 abstract 2
- 239000007769 metal material Substances 0.000 abstract 1
- 238000009749 continuous casting Methods 0.000 description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 5
- 238000005266 casting Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 238000009826 distribution Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 239000003245 coal Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000013208 measuring procedure Methods 0.000 description 1
- 238000010309 melting process Methods 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 238000012802 pre-warming 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
-
- 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
- C21C5/56—Manufacture of steel by other methods
- C21C5/562—Manufacture of steel by other methods starting from scrap
- C21C5/565—Preheating of scrap
-
- 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
- C21C5/5252—Manufacture of steel in electric furnaces in an electrically heated multi-chamber furnace, a combination of electric furnaces or an electric furnace arranged for associated working with a non electric furnace
-
- 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
-
- 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
- F27B19/00—Combinations of furnaces of kinds not covered by a single preceding main group
- F27B19/04—Combinations of furnaces of kinds not covered by a single preceding main group arranged for associated working
-
- 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
- F27D3/00—Charging; Discharging; Manipulation of charge
- F27D3/18—Charging particulate material using a fluid carrier
- F27D2003/185—Conveying particles in a conduct using a fluid
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Metallurgy (AREA)
- Manufacturing & Machinery (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Vertical, Hearth, Or Arc Furnaces (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
- Treatment Of Steel In Its Molten State (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
- Furnace Details (AREA)
- Heat Treatment Of Steel (AREA)
- Forging (AREA)
Abstract
The invention relates to a method and device for producing liquid steel (1), wherein the inventive method consists in melting metal materials (2) in an independent melting vessel (3) by means of fossil energy sources (4), in processing a molten material (5) in an overheating vessel (6), in tapping said molten material and transporting it to another treating vessel (7) and in analysing the steel quality. The inventive method makes it possible to economically consume energy and involves the following stages: preheating/melting, overheating, transport and a secondary metallurgical/overheating processing.
Description
DrG REF: 108926
Method and device for producing liquid steel
The invention relates to a method and device for producing liquid steel on a scrap metal basis in a shaft furnace as melting vessel, with an upstream overheating vessel, whereby the charged material is pre- warmed in an upper part of the melting vessel, is molten subsequently in a bottom part by means of fossil energy carriers and the melt is led off into the overheating vessel, in which the steel analysis and an ' overheating temperature are adjusted.
Such a process is known from the WO 03/068995 Al / DE 102 05 660.
Thereby scrap iron, sponge iron or the like is pre-warmed in the upper part of the melting vessel and subsequently is molten in a bottom part of the melting vessel by means of the fossil fuels. The melt is discharged continuously into a treatment vessel, in which the desired steel quality is adjusted, whereby in the melting vessel gasses for post burning of the process gasses are introduced. The further development consists in known manner therein that for the process gasses different post combustion levels and an inner stack projecting into the material shaft are suggested.
Such steel melting processes serve for preparing melting charges, such : as for example during steel continuous casting into slabs of different thicknesses up to thin strands in the range of 40 - 150 mm thickness.
After tapping the melt from an electric-arc furnace as overheating vessel due to the low residue melt remaining in the vessel, a considerably reduced energy supply or a switching off of the energy supply Is necessary in order to avoid a too high overheating of the residue melt and an excessive wear of the furnace floor. Consequently a fluctuating utilization of the electrical energy results. It is also
Pd disadvantageous that the electric-arc furnace and a ladle heating furnace are separated considerably spatially from each other so that during transportation correspondingly high energy losses occur. For the electric-arc furnace and the ladle heating furnace a separate electrical energy supply must be provided.
The invention has as object to reduce considerably the indicated losses in electrical energy in the electric-arc furnace and in the ladle heating furnace due to excessive overheating in the electric-arc furnace and due to losses in the dependent energy supply in the ladle heating furnace. "The stated object is solved in accordance with the invention thereby (a) that the melting output (L) intended for the independent melting vessel and the surface (A) of the cross-section meet the following condition:
L [ MW] > 2,3 MW / m?
Al m?] (b) that the relationship of the electrical power L o presented in the overheating vessel to the power from fossil energy in the melting vessel meet the following condition:
L el -— 20,18
L fossil
(c) and that the relationship A of the oxidation substances in the electric-arc furnace to the fossil energy carriers in the melting vessel is adjusted to between 0,6 and 1,2
Thereby already in the following overheating vessel and in the following process steps less energy is consumed. The steel production process up to the casting off of the steel into a continuous casting arrangement is consequently more economic than hitherto and forms a closed method chain of melting vessel up to the ladle heating furnace ahead of the casting off of the melt in the continuous casting "10 arrangement.
An embodiment consists therein that the overheating vessel is placed onto load cells and the supplied melting current is applied from the melting vessel taking care of the obtained other mass flows by differential formation of the measured values and for controlling the electrical energy supply. The melting procedure thus can be controlled or directed corresponding to the operational situation in the overheating vessel.
Furthermore it is provided that the electrical data, which is supplied from the load cells by way of a measuring conductor to the mass flows and the electrical data of a dosing arrangement, which is supplied by way of a measuring conductor to a calculator, and the calculator controls, by way of a load tap switch, the electrical power supplied by a transformer via the electrodes.
A device for producing liquid steel on scrap material basis in a shaft furnace as melting furnace, to which an overheating vessel is provided upstream, with a combustion arrangement for fossil energy carriers arranged in a bottom part of the melting vessel as well as an
‘overheating vessel joined to the bottom part of the melting vessel by way of a tapping opening, solves the object therewith that (a) the melting power (L) intended for the independent melting vessel and the surface (A) of the cross-section meet the following condition:
L [ MW] >2,3 MW / m2?
Alm?] (b) that the relationship of the electrical power L o presented in the overheating vessel to the power from fossil energy carriers in the melting vessel meet the following condition:
L el 20,18
L rossi (c) and that the relationship A of the oxidation substances in the overheating vessel to the fossil energy carriers in the melting vessel is adjusted to between 0,6 and 1,2
Thereby the energy distribution is considerably more uniform during the individual process steps.
According to further characteristics the energy distribution is furthermore more uniform in that the overheating vessel is placed on the load cells and the supplied melting current from the melting vessel is obtained taking care of the other mass flows by differential formation ~ of the measured values and is applied for controiling the combustion arrangement in the melting vessel.
The combination of the control system between the melting vessel and the overheating vessel can be created thereby that the electrical data, is led from the load cells via a measuring conductor to the mass flow determination and the electrical data of the bunker and dosing 5 arrangement via a measuring conductor to the calculator, and that the calculator controls, via a control section of a natural gas and oxidation medium supply, the melting power of the combustion arrangement applied in the melting vessel and thereby the steel mass flow of the melting flow flowing from the melting vessel into the overheating vessel,
An independent alternative of the device for producing liquid steel, with an independent melting vessel for metallic charging materials and fossil energy carriers, an overheating vessel or electric arc furnace producing the liquid steel and/or treating it, a transportation ladle and a ladle furnace leads to an alternative solution of the object, therein that the electric-arc furnace is divided in the lower part by way of an intermediate wall into two regions, whereby the flow direction of the liquid steel and overheating zone and the analysis zone are separated or connectable by a slide closure. The vessel can receive a large , 20 quantity of the tap weight. In the first region the overheating can take : place in the flow direction of the steel and in the second region a metallurgical treatment, which normally takes place as such in the ladle furnace, takes place.
The capacity of the furnace plant can be such that the two regions receive about double the quantity of the normal tap weight of a comparable electric-arc furnace.
In this construction the two regions of the overheating vessel respectively are provided each with its own electrode unit.
The operation can take place according to further characteristics, such that in flow direction the filling level of the second region, in which the metallurgical treatment takes place similar to a ladle furnace, at full tapping weight is equally high or lower than the filling level in the first region during a lower level of the melt in this first region.
In the drawing examples of embodiments of the invention are represented, which hereafter are explained in more detail.
It is shown in:
Figure1 a block diagrammatic representation of the method development in a melting vessel, an overheating vessel, a transportation ladle and in a ladle furnace,
Figure 2 a vertical section through an electric-arc furnace on load cells with block diagram of the measuring procedures,
Figure 3A a vertical section through an electric-arc furnace constructed with two regions and
Figure 3B the plan view belonging to Figure 3A.
The method (Figure 1) operates on scrap metal basis with a predominant provision of fossil energy.
In a first method step the pre-warming and melting of metallic charging materials 2 takes place in a melting vessel 3 with a portion of 90 - 100 % of fossil primary energy, which is supplied by fossil energy carriers 4, and a portion of electrical energy of 10 - 0 %.
In a second step an overheating of the melt 5 is performed in an overheating vessel 6 (electric-arc furnace) to 1580°C up to 1610°C of the liquid steel 1.
In a third step the melt 5 overheated thereby is driven in a ladle 7a onto a carriage 12 over a rail track 11 to a ladle furnace 7b.
In a fourth step the adjustment of the analysis of the liquid steel 1 at further overheating to 1580°C - 1650°C takes place, which s subsequently is led to a continuous casting arrangement 34.
In such a method for producing liquid steel 1, whereby metallic charging materials 2 (scrap, iron sponge or the like) is molten the independent melting vessel 3 together with the fossil energy carriers 4 (oil, gas, coal and the like) and the melt 5 treated in the overheating vessel 6 is tapped and is transported in a further treatment vessel 7 and, prior to the casting into the continuous casting arrangement 34, is adjusted in the analysis, an ecological and economic procedure is ensured.
The process hereby is performed according to found rules, according to which (a) the melting power L intended for the independent melting vessel 3 and the surface A of the cross-section meet the following condition:
L [ MW] ee 523MW/m?
A[m?] (b) furthermore, that the relationship of the electrical power L presented in the overheating vessel 6 to the power from fossil energy 4 in the melting vessel 3 meet the following condition:
L el 20,18
L fossi (c) and that the relationship A of the oxidation substances in the overheating vessel 6 to the fossil energy carriers 4 in the melting vessel 3 is adjusted to between 0,6 and 1,2
In Figure 2 the viewing direction is selected to be perpendicular to the : lower part 6a so that the melting vessel 3 appears to lie behind the furnace lid. The lower part 6a of the overheating vessel 6 is supported on the load cells 20 by way of a tilting arrangement 25. Furthermore a measuring arrangement is shown by way of its essential elements with the constructional groups for the measurement of the mass flows 31, a measuring conductor 26 for the mass flow determination, a steel mass flow determination calculator 21, a load tap switch 22, a bunker and dosing arrangement for aggregates 23, a natural gas oxidation control . stretch 30, the tilting arrangement 25 for tapping the overheating vessel 6, .a measuring conductor 27 for the dosing system and a conductor for a feedback signal 28.
In the Figures 3A and 3B a further alternative for the embodiment of the overheating vessel 6 or the electric-arc furnace and the melting vessel 3 is indicated: For this purpose the overheating vessel 6 is sub- divided in the lower part 6a by way of an intermediate wall 13 into two regions, a first (right hand) region 14 and a second (left hand) region 15, whereby in flow direction 16 of the liquid steel 1 an overheating zone 17 and by way of a slider closure 18 the two regions 14, 15 are separated or joined. The left, second region 15 forms the analysis zone 19, which corresponds to the ladle 7a in the ladle furnace 7b. In the two regions 14 and 15 of the overheating vessel 6 independent electrode units 10 with electrodes 10a are provided, which alternatively also can be raise- and lowerable and pivotable.
As shown in Figure 3A, the filling level 9 of the second (left) region 15 in flow direction 16, in which the metallurgical treatment takes place similar to that in a ladle furnace 7b is at full tapping weight equally high or lower than the filling level 9 in the first region 14. For this the first region 14 furthermore can be used for melting the respective charge parallel to the feeding of the melt 5 through a channel 33 from the melting vessel 3 — Figure 3B. A further advantage consists in the storage capacity of the second region 15, from which liquid steel 1 can : be withdrawn at any time with corresponding overheating. The withdrawn part can, for example, also be considered as liquid steel storage during interruptions in the development of the continuous casting arrangement 34 due to a hitherto unknown supply of steel 1.
oC
Reference list 1 liquid steel 2 metallurgical charging materials 3 melting vessel s 3a upper part 3b lower part 4 fossil energy carrier © melt 6 overheating vessel (electric-arc furnace) 6a substructure 7 treatment vessel 7a ladle 7b ladle furnace 8 common electrical energy source 9 filling level 10 electrode unit 10a electrode 11 rail track 12 carriage 13 intermediate wall
14 first region : 15 second region : 16 flow direction 17 overheating zone 18 slider closure 19 analysis zone 20 load cells 21 steel mass load determination calculator 22 load tap switch 23 bunker and dosing arrangement for aggregates 24 transformer 25 tilting arrangement 26 measuring conductor of the mass flow determination 27 measuring conductor of the dosing arrangement 28 feedback signal 29 adjustment signal natural gas oxidation control section 31 mass flow 32 combustion arrangement in the melting vessel - 20 33 channel
34 continuous casting arrangement
Claims (10)
1. A method for producing liquid steel (1) on a scrap metal basis in a shaft furnace as melting vessel (3), with an upstream overheating vessel (6), whereby the charged material is pre- warmed in an upper part (3a) of the melting vessel (3), is molten in a lower part (3b) by means of fossil energy carriers (4) and the melt is led off into the overheating vessel (6), in which the steel analysis and an overheating temperature are adjusted, characterized thereby that (a) the melting power (L) intended for the independent melting vessel (3) and the surface (A) of the cross-section meet the following condition: L [ MW] : > 2,3 MW / m? A[m?] (b) that the relationship of the electrical power L o presented in the overheating vessel (6) to the power from fossil energy (4) in the melting vessel (3) meet the following condition: L el 20,18 L fossil (c) and that the relationship A of the oxidation substances in the overheating vessel (6) to the fossil energy carriers (4) in the melting vessel (3) is adjusted to between 0,6 and
1,2.
2. Method according to claim 1, characterized thereby that the overheating vessel (6) is placed on load cells (20) and the supplied melt flow from the melting vessel (3) is determined whilst taking care of the other mass flows (31) by differential formation of the measuring values and is applied for controlling the electrical energy supply.
3. Method according to claim 2, characterized thereby that the electrical data are supplied from the load cells (20) by way of a measuring conductor (26) to the mass flows (31) and the electrical data of a dosing arrangement (22) which are supplied by way of a measuring conductor (27) to a calculator (21), and the calculator (21) controls by way of a load tap switch (22) the electrical power supplies from a transformer (24) by way of the electrodes (10a).
4. Device for producing liquid steel (1) on scrap material basis in a shaft furnace as melting furnace (3), to which an overheating vessel (6) is provided upstream, with a combustion arrangement (32) for fossil energy carriers.(4) arranged in a lower part (3b) of the melting vessel (3) as well as an overheating vessel (6) joined to the lower part (3b) of the melting vessel (3) by way of a tapping opening, characterized thereby that (a) the melting power (L) intended for the independent melting vessel (3) and the surface (A) of the cross-section meet the following condition: L[ MW] > 23MW/m? Alm?]
(b) that the relationship of the electrical power (L) « presented in the overheating vessel (6) to the power from fossil energy (4) in the melting vessel (3) meet the following condition: L el 20,18 L fossil (¢) and that the relationship A of the oxidation substances in the overheating vessel (6) to the fossil energy carriers (4) in the melting vessel (3) is adjusted to between 0,6 and
1,2.
5. Device according to claim 4, characterized thereby that the overheating vessel (6) is placed onto load cells (20) and the supplied melting current from the melting vessel (3) is determined taking care of the other mass flows (31) by way of differential formation of the determined measurement values and is applied for controlling the combustion arrangement (32) in the melting vessel (3).
6. Device according to claim 5, characterized thereby that the electrical data, which is supplied on the load cells (20) by way of a measuring conductor (26) of the mass flow determination and the electrical data of the bunker and dosing arrangement (23), are supplied by way of a measuring conductor (27) to the calculator (21) and that the calculator (21) controls the melting output of the melting vessel (3) applied in the combustion arrangement (32) over a control section of a natural gas and oxidation medium supply (30) and thereby the steel mass flow of the melting current flowing from the melting vessel (3) into the overheating vessel (6) is controlled.
7. Device according to one of the claims 4 to 6, characterized thereby that the electric arc furnace (6) is sub-divided in the lower part (6a) by way of an intermediate wall (13) into two regions (14; 15), whereby in flow direction (16) of the liquid steel (1) and an overheating zone (17) and an analysis zone (19) are separated or joined by way of a slider closure (18).
8. Device according to claim 7, characterized thereby that the two regions (14; 15) receive about double the quantity of the normal tapping weight of a comparable overheating vessel (6).
9. Device according to one of the claims 7 or 8, characterized thereby that the two regions (14; 15) of the overheating vessel (6) respectively are provided with its own electrode unit (10).
10. Device according to one of the claims 7 to 9, characterized thereby that the filling level (9) of the second region (15) in flow direction (16). in which the metallurgical treatment takes place similar to a ladle furnace (7b), at full tapping weight is equally high or low as the filling level (9) in the first region (14) at the lower level of the melt (5) in this first region (14). t:\files\26\108926\108926translation of international app.doc
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102004046728A DE102004046728A1 (en) | 2004-09-25 | 2004-09-25 | Method and device for producing liquid steel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| ZA200608705B true ZA200608705B (en) | 2008-04-30 |
Family
ID=35744595
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ZA200608705A ZA200608705B (en) | 2004-09-25 | 2006-10-18 | Method and device for producing liquid steel |
Country Status (12)
| Country | Link |
|---|---|
| EP (1) | EP1792133B1 (en) |
| JP (1) | JP2008514811A (en) |
| KR (1) | KR20070060048A (en) |
| CN (1) | CN100564545C (en) |
| AT (1) | ATE441075T1 (en) |
| DE (2) | DE102004046728A1 (en) |
| ES (1) | ES2328603T3 (en) |
| RU (1) | RU2353664C2 (en) |
| TW (1) | TW200617178A (en) |
| UA (1) | UA83137C2 (en) |
| WO (1) | WO2006032347A2 (en) |
| ZA (1) | ZA200608705B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006133679A2 (en) * | 2005-06-13 | 2006-12-21 | Karl Konzelmann Metallschmelzwerke Gmbh & Co. Kg | Method for adjusting pre-determined melting properties of a liquid metal, especially liquid aluminium, treatment system, transport container, and transport vehicle for liquid metal |
| DE202008015431U1 (en) | 2008-11-20 | 2009-02-12 | Sug Schmelz- Und Giessanlagen Gmbh & Co. Kg | Treatment plant for liquid metal |
| CN103838199B (en) * | 2012-11-28 | 2016-12-21 | 沈阳铝镁设计研究院有限公司 | A kind of control system for electrolytic aluminium factory energy conservation |
| DE102018216539A1 (en) * | 2018-09-27 | 2020-04-02 | Sms Group Gmbh | Method for operating an electric arc furnace |
| CN109880955B (en) * | 2019-04-17 | 2021-01-08 | 中国恩菲工程技术有限公司 | Smelting method and smelting device for treating iron-based multi-metal ore material in short process |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2504911C3 (en) * | 1975-02-06 | 1978-12-14 | Kloeckner-Werke Ag, 4100 Duisburg | Device for melting down scrap, sponge iron or the like |
| DE3322485A1 (en) * | 1982-06-24 | 1983-12-29 | British Steel Corp., London | Apparatus and process for metal processing or refining |
| AT384669B (en) * | 1986-03-17 | 1987-12-28 | Voest Alpine Ag | PLANT FOR PRODUCING STEEL FROM SCRAP |
| AT395656B (en) * | 1990-11-19 | 1993-02-25 | Voest Alpine Ind Anlagen | SYSTEM FOR THE PRODUCTION OF LIQUID METALS |
| AT398487B (en) * | 1991-12-16 | 1994-12-27 | Voest Alpine Ind Anlagen | Electric arc furnace for producing steel |
| JP3231601B2 (en) * | 1995-11-21 | 2001-11-26 | トヨタ自動車株式会社 | Electric furnace temperature control method and apparatus |
| RU2128407C1 (en) * | 1997-06-20 | 1999-03-27 | Открытое акционерное общество "НОСТА" | Method for controlling electric current and voltage of steel-making arc furnace |
| AU2039201A (en) * | 1999-09-14 | 2001-04-17 | Danieli Technology, Inc. | High temperature premelting apparatus |
| DE10205660B4 (en) * | 2002-02-12 | 2010-11-25 | Sms Siemag Aktiengesellschaft | Process and apparatus for continuous steelmaking using metallic feedstock |
-
2004
- 2004-09-25 DE DE102004046728A patent/DE102004046728A1/en not_active Withdrawn
-
2005
- 2005-08-30 ES ES05783034T patent/ES2328603T3/en active Active
- 2005-08-30 AT AT05783034T patent/ATE441075T1/en active
- 2005-08-30 JP JP2007532791A patent/JP2008514811A/en not_active Withdrawn
- 2005-08-30 UA UAA200612936A patent/UA83137C2/en unknown
- 2005-08-30 KR KR1020067022918A patent/KR20070060048A/en not_active Application Discontinuation
- 2005-08-30 CN CNB2005800162645A patent/CN100564545C/en not_active Expired - Fee Related
- 2005-08-30 DE DE502005008001T patent/DE502005008001D1/en active Active
- 2005-08-30 WO PCT/EP2005/009353 patent/WO2006032347A2/en active Application Filing
- 2005-08-30 RU RU2006143649/02A patent/RU2353664C2/en not_active IP Right Cessation
- 2005-08-30 EP EP05783034A patent/EP1792133B1/en not_active Not-in-force
- 2005-09-02 TW TW094130075A patent/TW200617178A/en unknown
-
2006
- 2006-10-18 ZA ZA200608705A patent/ZA200608705B/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| TW200617178A (en) | 2006-06-01 |
| DE502005008001D1 (en) | 2009-10-08 |
| EP1792133A2 (en) | 2007-06-06 |
| EP1792133B1 (en) | 2009-08-26 |
| RU2006143649A (en) | 2008-06-20 |
| ATE441075T1 (en) | 2009-09-15 |
| CN101072975A (en) | 2007-11-14 |
| CN100564545C (en) | 2009-12-02 |
| WO2006032347A3 (en) | 2007-06-21 |
| KR20070060048A (en) | 2007-06-12 |
| DE102004046728A1 (en) | 2006-04-06 |
| UA83137C2 (en) | 2008-06-10 |
| ES2328603T3 (en) | 2009-11-16 |
| JP2008514811A (en) | 2008-05-08 |
| WO2006032347A2 (en) | 2006-03-30 |
| RU2353664C2 (en) | 2009-04-27 |
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