EP0108232B1 - Procédé pour la réduction de minerais métalliques en fusion - Google Patents
Procédé pour la réduction de minerais métalliques en fusion Download PDFInfo
- Publication number
- EP0108232B1 EP0108232B1 EP83109472A EP83109472A EP0108232B1 EP 0108232 B1 EP0108232 B1 EP 0108232B1 EP 83109472 A EP83109472 A EP 83109472A EP 83109472 A EP83109472 A EP 83109472A EP 0108232 B1 EP0108232 B1 EP 0108232B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- ore
- reaction vessel
- oxygen
- molten metal
- reducing agent
- 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.)
- Expired
Links
- 238000000034 method Methods 0.000 title claims description 32
- 229910052751 metal Inorganic materials 0.000 title claims description 20
- 239000002184 metal Substances 0.000 title claims description 20
- 238000006243 chemical reaction Methods 0.000 claims description 18
- 239000003245 coal Substances 0.000 claims description 13
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 11
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 11
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 11
- 229910052799 carbon Inorganic materials 0.000 claims description 11
- 229910052760 oxygen Inorganic materials 0.000 claims description 11
- 239000001301 oxygen Substances 0.000 claims description 11
- 239000003638 chemical reducing agent Substances 0.000 claims description 10
- 239000007788 liquid Substances 0.000 claims description 10
- 239000000203 mixture Substances 0.000 claims description 9
- 239000007789 gas Substances 0.000 claims description 7
- 229910052742 iron Inorganic materials 0.000 claims description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 229910001092 metal group alloy Inorganic materials 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 239000000725 suspension Substances 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 3
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 2
- 229910052804 chromium Inorganic materials 0.000 claims description 2
- 239000011651 chromium Substances 0.000 claims description 2
- 150000002739 metals Chemical class 0.000 claims description 2
- 229910000851 Alloy steel Inorganic materials 0.000 claims 1
- 229910045601 alloy Inorganic materials 0.000 claims 1
- 239000000956 alloy Substances 0.000 claims 1
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 230000004927 fusion Effects 0.000 claims 1
- 238000003723 Smelting Methods 0.000 description 9
- 238000011946 reduction process Methods 0.000 description 5
- 238000007664 blowing Methods 0.000 description 3
- 239000002893 slag Substances 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 238000010915 one-step procedure Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 229910000805 Pig iron Inorganic materials 0.000 description 1
- 241001062472 Stokellia anisodon Species 0.000 description 1
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 229910000423 chromium oxide Inorganic materials 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000010309 melting process Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 230000035899 viability Effects 0.000 description 1
Images
Classifications
-
- 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
- C22B5/00—General methods of reducing to metals
- C22B5/02—Dry methods smelting of sulfides or formation of mattes
- C22B5/10—Dry methods smelting of sulfides or formation of mattes by solid carbonaceous reducing agents
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/02—Making spongy iron or liquid steel, by direct processes in shaft furnaces
- C21B13/023—Making spongy iron or liquid steel, by direct processes in shaft furnaces wherein iron or steel is obtained in a molten state
-
- 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
- C22B5/00—General methods of reducing to metals
- C22B5/02—Dry methods smelting of sulfides or formation of mattes
- C22B5/12—Dry methods smelting of sulfides or formation of mattes by gases
Definitions
- Smelting reduction processes offer the possibility of using fine-grained ores as feedstocks without time-consuming preparation. Due to the high energy concentration and the favorable mass transfer conditions in the liquid phases, the volume-specific reaction rate is significantly higher than with conventional reduction processes.
- the rotor process is characterized by charging ore with coal into a rotating vessel in which the ore is reduced and the iron is simultaneously melted. Vessel rotation separates slag and molten metal due to their different densities.
- the electric furnace process is the most common on an industrial scale. Ore, scrap and coal are batched into the furnace and melted by electric arcs.
- the ore is reduced during the melting process, with additional oxygen being blown in in order to cause complete combustion of the CO to form Co 2 .
- a disadvantage of the known smelting reduction processes is that they cannot be carried out in one step, but require additional process steps, energy and systems either for the exhaust gas treatment or the ore preparation.
- the reducing agent and oxygen at such a height above the molten metal bath formed in the reaction vessel into the components of iron ore, chromium ore and ores or oxides corresponding to a mixture of the desired composition of the fully alloyed steel or a steel pre-melt other ore columns of other alloying elements are introduced and liquefied together at least partially to form a suspension, so that the reduced, falling metal drops reach the metal melt bath with low carbon content, the ore being liquefied up to a height in the reaction vessel above the point of introduction for carbon and oxygen that Carbon is only completely oxidized, ie as C0 2 , escapes from the reaction vessel.
- the procedure according to the invention provides for a series of measures which only solve the problem in cooperation. It is an essential aspect of the method according to the invention that the coal required for the reduction is only introduced into the liquid ore column from the outside, so that the CO 2 formed does not react to CO again through contact with carbon in the liquid ore column, which then results in exhaust gas treatment and would require recovery. This is also the point of view which essentially differentiates the method according to the invention from the known smelting reduction methods. In the known processes, ore is in Mixture charged with coal. The method according to the invention requires a timed addition of ore, carbon and oxygen in accordance with the stoichiometry, the reaction rate and the specific heat requirement both in batch and in continuous operation.
- the coal has to be introduced at a location so high above the level of the molten metal accumulating in the bottom of the reaction vessel that on the one hand the metal reaches the molten metal bath with as little carbon as possible and on the other hand no carbon is introduced into the molten metal. This avoids or reduces the effort for additional fresh treatment.
- Coal and oxygen can be supplied at several levels, ideally according to local needs.
- a shaft furnace is shown schematically as a reaction vessel.
- the equations of the reactions taking place are given for iron as an example.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Manufacture Of Iron (AREA)
Claims (1)
- Procédé de fabrication de métaux et d'alliages métalliques par réduction par fusion de minerais ou de mélanges de minerais, à l'aide de carbone et/ou de gaz pour opérations chimiques comme réducteurs, dans un réacteur tel que convertisseur ou four à cuve, le réducteur étant introduit avec de l'oxygène dans une colonne de minerai liquide produite dans le réacteur, caractérisé en ce que le réducteur et l'oxygène sont introduits à une hauteur telle au-dessus du bain de fusion du métal en formation dans le réacteur, dans la colonne de minerai constituée par un mélange des composants minerai de fer, minerai de chrome et minerais ou oxydes d'autres composants d'alliage correspondant à la composition souhaitée de l'acier allié final, pour y être liquéfiés ensemble au moins en partie en formant une suspension, que les gouttes de métal réduit s'enfonçant vers le bas sont à faible taux de carbone lorsqu'elles arrivent dans le bain de métal fondu, le minerai étant liquéfié dans le réacteur jusqu'à une hauteur telle au-dessus du point d'introduction du carbone et de l'oxygène que le carbone ne s'échappe du réacteur que totalement oxydé, c'est-à-dire sous la forme de CO2.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3237144 | 1982-10-07 | ||
| DE3237144 | 1982-10-07 | ||
| DE3240656 | 1982-11-04 | ||
| DE3240656A DE3240656C2 (de) | 1982-10-07 | 1982-11-04 | Verfahren zur Schmelzreduktion von Metallerz |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0108232A1 EP0108232A1 (fr) | 1984-05-16 |
| EP0108232B1 true EP0108232B1 (fr) | 1989-11-15 |
Family
ID=25804978
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP83109472A Expired EP0108232B1 (fr) | 1982-10-07 | 1983-09-23 | Procédé pour la réduction de minerais métalliques en fusion |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP0108232B1 (fr) |
| DE (2) | DE3240656C2 (fr) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3922095A1 (de) * | 1989-07-05 | 1991-01-10 | Klimanek Margareta | Verfahren zur direkten stahlherstellung aus fluessigen eisenoxiden im konverterstahlherstellungsverfahren |
| DE4030272A1 (de) * | 1990-02-28 | 1991-08-29 | Klimanek Margot | Verfahren zur herstellung wiederverwendbarer produkte aus metallischen schlaemmen mit oelanhaftungen und anderen verunreinigungen |
| DE4042176C2 (de) * | 1990-12-29 | 1993-12-09 | Tech Resources Pty Ltd | Verfahren zur Reduktion von Metalloxiden im schmelzflüssigen Zustand |
| BE1006828A3 (fr) * | 1991-07-12 | 1995-01-03 | Elsen Tooling Ireland Ltd | Procede en vue de la preparation de metaux, et en particulier de fer, a partir de minerais oxydes, a une temperature de reduction quelconque, dans un four de reduction a gouttes. |
| DE19917128C1 (de) * | 1999-04-15 | 2000-12-28 | Hans Ulrich Feustel | Roheisenerzeugung mit Sauerstoff und Kreislaufgas in einem koksbeheizten Schachtofen |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE201178C (fr) * | ||||
| US1105001A (en) * | 1912-11-05 | 1914-07-28 | Elfego Riveroll | Smelting-furnace. |
| US1105901A (en) | 1913-07-11 | 1914-08-04 | Israel Gitenstein | Undergarment. |
| DE605975C (de) * | 1932-02-19 | 1934-11-22 | Hoesch Koeln Neuessen Akt Ges | Verfahren zur Herstellung von Stahl |
| US2865733A (en) * | 1952-04-30 | 1958-12-23 | Finanziaria Siderurgica Finsid | Smelting process |
| DE1458797A1 (de) * | 1964-05-06 | 1969-02-27 | Enn Vallak | Verfahren und Vorrichtung zur Schmelzreduktion von Metallen |
| DE1583229A1 (de) * | 1966-10-20 | 1970-07-30 | Adriano Carli | Verfahren zur Herstellung von Roheisen durch Reduktion von eisenoxydhaltigen Chargen in hochofenaehnlichen,schachtfoermigen Reduktionsoefen,und Reduktionsofen zur Durchfuehrung dieses Verfahrens |
| SE330704B (fr) * | 1966-11-15 | 1970-11-30 | M Brunner | |
| BE757182A (fr) * | 1969-10-07 | 1971-03-16 | Oesterr Alpine Montan | Procede pour la reduction de minerais |
-
1982
- 1982-11-04 DE DE3240656A patent/DE3240656C2/de not_active Expired
-
1983
- 1983-09-23 EP EP83109472A patent/EP0108232B1/fr not_active Expired
- 1983-09-23 DE DE8383109472T patent/DE3380851D1/de not_active Expired
Non-Patent Citations (2)
| Title |
|---|
| Scandinavian Journal of Metallurgy 4 (1975), S. 205-210 * |
| Stahl und Eisen, 106 (1986), S. 421-429 * |
Also Published As
| Publication number | Publication date |
|---|---|
| DE3380851D1 (en) | 1989-12-21 |
| DE3240656A1 (de) | 1984-04-12 |
| DE3240656C2 (de) | 1986-06-19 |
| EP0108232A1 (fr) | 1984-05-16 |
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