EP0368266A1 - Procédé et installation d'une cubilot pour la production de fer de grande qualité - Google Patents
Procédé et installation d'une cubilot pour la production de fer de grande qualité Download PDFInfo
- Publication number
- EP0368266A1 EP0368266A1 EP89120671A EP89120671A EP0368266A1 EP 0368266 A1 EP0368266 A1 EP 0368266A1 EP 89120671 A EP89120671 A EP 89120671A EP 89120671 A EP89120671 A EP 89120671A EP 0368266 A1 EP0368266 A1 EP 0368266A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- melt
- slag
- cupola furnace
- chamber
- cupola
- 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.)
- Withdrawn
Links
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 44
- 238000000034 method Methods 0.000 title claims abstract description 24
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 22
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 8
- 238000009434 installation Methods 0.000 title 1
- 239000000155 melt Substances 0.000 claims abstract description 60
- 239000002893 slag Substances 0.000 claims abstract description 29
- 239000000956 alloy Substances 0.000 claims abstract description 21
- 239000000463 material Substances 0.000 claims abstract description 10
- 239000011261 inert gas Substances 0.000 claims description 9
- 238000005192 partition Methods 0.000 claims description 8
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 4
- 239000007789 gas Substances 0.000 claims description 4
- 229910052786 argon Inorganic materials 0.000 claims description 2
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 229910052757 nitrogen Inorganic materials 0.000 claims description 2
- 239000007787 solid Substances 0.000 claims description 2
- 229910045601 alloy Inorganic materials 0.000 abstract description 2
- 238000007792 addition Methods 0.000 description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 5
- 229910052799 carbon Inorganic materials 0.000 description 5
- 239000000571 coke Substances 0.000 description 5
- 229910000805 Pig iron Inorganic materials 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 229910001018 Cast iron Inorganic materials 0.000 description 3
- 238000010079 rubber tapping Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 241001062472 Stokellia anisodon Species 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000002817 coal dust Substances 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- 238000010309 melting process Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B11/00—Making pig-iron other than in blast furnaces
- C21B11/02—Making pig-iron other than in blast furnaces in low shaft furnaces or shaft furnaces
-
- 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
- C21C1/08—Manufacture of cast-iron
-
- 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
- F27B1/00—Shaft or like vertical or substantially vertical furnaces
- F27B1/02—Shaft or like vertical or substantially vertical furnaces with two or more shafts or chambers, e.g. multi-storey
- F27B1/025—Shaft or like vertical or substantially vertical furnaces with two or more shafts or chambers, e.g. multi-storey with fore-hearth
Definitions
- the invention relates to a method for producing high-quality iron with the aid of a cupola furnace in which a melt is formed with the formation of slag.
- cupola furnaces consist of a towering shaft and a melt collecting space arranged under this shaft.
- the iron material to be melted and other feedstocks, for example coke, are introduced into the shaft and sink under heating, the so-called furnace wind being introduced into the shaft, which serves to support coke combustion and heat generation.
- the heat is essentially supplied using burners in the lower shaft area.
- the melt collecting space At the lower end of the shaft below a grating arranged there is the melt collecting space, in which molten iron and slag also accumulate.
- the smelt collecting space still has outlets for tapping the smelt and slag.
- the object of the invention is therefore to provide, in connection with iron production with a cupola furnace, a method with which high-quality iron can be produced with the cupola furnace with as little effort as possible.
- melt formed in the cupola is alloyed in the cupola with the desired materials in the desired amount, means being provided in the cupola to separate at least part of the melt from the slag, and then the slag-free part of the Alloy materials are mixed in the molten bath.
- the slag-free melt bath to be applied is circulated continuously or temporarily. This achieves a uniform distribution and mixing in of the alloy materials, for example in powder form, via an addition option arranged above the melt, and also maintains a uniform temperature distribution in the melt.
- the melt can be circulated in a favorable manner by introducing inert gas into the melt, for example with the aid of a gas-permeable wall or floor insert.
- the alloy materials are introduced pneumatically into the melt using inert gas, for example nitrogen or argon. This results in a rapid distribution of the alloy additions in the melt while at the same time circulating the melt.
- inert gas for example nitrogen or argon.
- a cupola furnace for carrying out the process according to the invention has a separating device in its melt collecting space which essentially divides it into two chambers, so that melt but no slag can get from one chamber, the slag chamber, into the other chamber, the treatment chamber, and above
- means for admixing alloy materials are set up in the treatment chamber.
- a massive partition wall with a passage opening (s) under the melt surface is provided as the partition device, the partition wall reaching so far over the melt surface that no slag can get from one side to the other.
- Another advantageous embodiment consists in that a gas curtain is provided as the separating device, which can be produced by means of gas-permeable inserts which are arranged in a line on the floor over the entire width of the melt collecting space.
- a particularly advantageously designed cupola furnace is further characterized in that, for example, at least one gas-permeable insert is used in the bottom or one of the walls of the treatment chamber, which insert is connected to an inert gas source and serves to circulate the melt.
- a burner preferably an oxygen-fuel burner, is arranged above the melt in the treatment chamber in the treatment chamber ceiling and is oriented to point to the melt.
- a further advantageously designed cupola furnace has a pneumatic feed lance in the banding chamber, which is connected to an inert gas source and a feed device for alloy material.
- the figure shows a cupola furnace, which is designed according to the invention.
- the cupola furnace consists of a shaft 10 and a melt collecting space 11 connected to it, which is divided into a slag chamber 12 and a treatment chamber 13 by a solid partition wall 14 with a passage opening 15.
- a grate 19 is attached, on which the insert located in the cupola, essentially consisting of scrap and coke, rests.
- the insert is introduced into the cupola shaft 10 through an addition opening 1.
- a base load burner 9 is arranged below the grate 19 and brings the main part of the heat necessary for the melting process into the cupola furnace (gas-fired cupola furnace).
- a tap opening 2 is provided on the one hand in the upper area of the slag chamber 12 and, on the other hand, a tap opening 3 in the lower area of the treatment chamber 13.
- a line 4 shows approximately the highest possible melt level in the melt collecting space, which extends approximately to the level of the tap opening 2.
- the slag 6 which is also formed is shown floating over the line 4 on the melt 5.
- a burner 16 directed towards the melt and a lance 17, which extends into the melt bath are also mounted in the treatment chamber 13.
- a gas-permeable insert 8 is inserted in the bottom of the treatment chamber 13.
- the feed material for example scrap and coke with a weight composition of approximately 90 to 100 scrap to 0 to 10% coke
- the feed material for example scrap and coke with a weight composition of approximately 90 to 100 scrap to 0 to 10% coke
- the melt collecting chamber 11 This is divided into two chambers 12, 13 with a partition, but below the melt surface via the opening 15 melt from one chamber to the other can flow. Above the melt, the partition extends so far out of the melt that no slag 6, which floats on the melt 5, can pass from the slag chamber 12 into the treatment chamber 13 and, on the other hand, gas can flow above the melt.
- the desired alloy materials for example carbon in the form of coal dust, are added to the molten iron in the desired amount.
- Other alloy materials such as manganese and silicon can also be added.
- the alloy materials are added pneumatically with the lance 17, ie the materials in powder form are introduced into the melt via the lance 17 with an inert gas stream.
- additional heating of the melt is carried out in the treatment room 13, which is advantageous or may even be necessary, for example, in the case of cast iron.
- a burner 16 is arranged directly above the melt in the treatment room 13 and aligned with it.
- the use of an oxygen burner with which particularly high temperatures and thus a high heat input with a low exhaust gas volume can be achieved is particularly advantageous here.
- inert gas is also introduced into the melt under pressure via the insert 18, as a result of which the melt is circulated and homogenized.
- the desired amount of alloy material is supplied with the addition of heat and simultaneous circulation of the melt in the treatment chamber 13 using the procedure just described.
- the slag is first removed from the slag chamber 12 via the tap opening 2.
- the melt can then be discharged from the treatment chamber via the tap opening 3, the opening 15 between the slag chamber and the treatment chamber being closed during the removal, or being or being, by suitable execution of the method, in order to exactly maintain the composition of the iron product and its homogeneity Melt from the slag chamber and the treatment chamber thoroughly mixed before removal.
- the process described enables the economical production of high-quality iron materials with cupola furnaces, in particular also with gas-fired cupola furnaces.
- cast iron with high carbon contents and various types of steel can be produced.
- the process enables in many cases that the processes for finishing the pig iron subsequent to the cupola furnace operation can be completely saved.
- the desired amount of alloy material is supplied with the addition of heat and simultaneous circulation of the melt in the treatment chamber 13 using the procedure just described.
- the slag is first removed from the slag chamber 12 via the tap opening 2.
- the melt can then be discharged from the treatment chamber via the tap opening 3, the opening 15 between the slag chamber and the treatment chamber being closed during the removal, or being or being, by suitable execution of the method, in order to exactly maintain the composition of the iron product and its homogeneity Melt from the slag chamber and the treatment chamber thoroughly mixed before removal.
- the process described enables the economical production of high-quality iron materials with cupola furnaces, in particular also with gas-fired cupola furnaces.
- cast iron with high carbon contents and various types of steel can be produced.
- the process enables in many cases that the processes for finishing the pig iron subsequent to the cupola furnace operation can be completely saved.
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)
- Vertical, Hearth, Or Arc Furnaces (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3838337 | 1988-11-11 | ||
| DE19883838337 DE3838337A1 (de) | 1988-11-11 | 1988-11-11 | Verfahren und kupolofenanlage zur erzeugung von hochwertigem eisen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP0368266A1 true EP0368266A1 (fr) | 1990-05-16 |
Family
ID=6367008
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP89120671A Withdrawn EP0368266A1 (fr) | 1988-11-11 | 1989-11-08 | Procédé et installation d'une cubilot pour la production de fer de grande qualité |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP0368266A1 (fr) |
| DE (1) | DE3838337A1 (fr) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5378260A (en) * | 1991-07-26 | 1995-01-03 | The United States Of America As Represented By The Department Of Energy | Two-zone countercurrent smelter system and process |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR367650A (fr) * | 1906-04-21 | 1906-11-06 | Joseph Marie Pignarre | Cubilot à avant creuset chauffé par la récupération des gaz |
| GB291258A (en) * | 1927-07-21 | 1928-05-31 | Gustav Simon | Improvements in shaft furnaces |
| DE1458933A1 (de) * | 1964-02-04 | 1969-10-16 | Strico Ges Fuer Metallurg U Wa | Verfahren und Kupolofen zum Bereitstellen verschiedener Eisenschmelzen |
| DE1583282A1 (de) * | 1967-12-16 | 1970-08-06 | Rexroth Gmbh G L | Verfahren zum durchlaufenden Behandeln von Kupolofenschmelzen mit Gasen und feinverteilten Zusaetzen |
| EP0261365A1 (fr) * | 1986-08-20 | 1988-03-30 | Plibrico Company GmbH | Lance immergée |
-
1988
- 1988-11-11 DE DE19883838337 patent/DE3838337A1/de not_active Withdrawn
-
1989
- 1989-11-08 EP EP89120671A patent/EP0368266A1/fr not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR367650A (fr) * | 1906-04-21 | 1906-11-06 | Joseph Marie Pignarre | Cubilot à avant creuset chauffé par la récupération des gaz |
| GB291258A (en) * | 1927-07-21 | 1928-05-31 | Gustav Simon | Improvements in shaft furnaces |
| DE1458933A1 (de) * | 1964-02-04 | 1969-10-16 | Strico Ges Fuer Metallurg U Wa | Verfahren und Kupolofen zum Bereitstellen verschiedener Eisenschmelzen |
| DE1583282A1 (de) * | 1967-12-16 | 1970-08-06 | Rexroth Gmbh G L | Verfahren zum durchlaufenden Behandeln von Kupolofenschmelzen mit Gasen und feinverteilten Zusaetzen |
| EP0261365A1 (fr) * | 1986-08-20 | 1988-03-30 | Plibrico Company GmbH | Lance immergée |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5378260A (en) * | 1991-07-26 | 1995-01-03 | The United States Of America As Represented By The Department Of Energy | Two-zone countercurrent smelter system and process |
Also Published As
| Publication number | Publication date |
|---|---|
| DE3838337A1 (de) | 1990-05-17 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT DE ES FR IT NL |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
| 18D | Application deemed to be withdrawn |
Effective date: 19901117 |