CH638242A5 - Method for desulfuring large quantities of melting iron, steel or cast iron. - Google Patents
Method for desulfuring large quantities of melting iron, steel or cast iron. Download PDFInfo
- Publication number
- CH638242A5 CH638242A5 CH13278A CH13278A CH638242A5 CH 638242 A5 CH638242 A5 CH 638242A5 CH 13278 A CH13278 A CH 13278A CH 13278 A CH13278 A CH 13278A CH 638242 A5 CH638242 A5 CH 638242A5
- Authority
- CH
- Switzerland
- Prior art keywords
- molded
- shaped
- pan
- region
- iron
- Prior art date
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- 229910001018 Cast iron Inorganic materials 0.000 title claims description 6
- 229910000831 Steel Inorganic materials 0.000 title claims description 5
- 239000010959 steel Substances 0.000 title claims description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Chemical compound data:image/svg+xml;base64,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 data:image/svg+xml;base64,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 [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title description 3
- 239000011514 iron Substances 0.000 title description 3
- 229910052742 iron Inorganic materials 0.000 title description 3
- 238000002844 melting Methods 0.000 title 1
- 239000000155 melts Substances 0.000 claims description 12
- FYYHWMGAXLPEAU-UHFFFAOYSA-N magnesium Chemical compound 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[Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 10
- 229910052749 magnesium Inorganic materials 0.000 claims description 10
- 239000011777 magnesium Substances 0.000 claims description 10
- 229910000805 Pig iron Inorganic materials 0.000 claims description 8
- 229910000499 pig iron Inorganic materials 0.000 claims description 8
- 229910052717 sulfur Inorganic materials 0.000 claims description 8
- 238000006477 desulfuration reactions Methods 0.000 claims description 6
- 230000003009 desulfurizing Effects 0.000 claims description 6
- 238000000034 methods Methods 0.000 claims description 6
- NINIDFKCEFEMDL-UHFFFAOYSA-N sulfur Chemical compound 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[S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 6
- 239000011593 sulfur Substances 0.000 claims description 6
- 239000011819 refractory materials Substances 0.000 claims description 3
- 230000035484 reaction time Effects 0.000 claims description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-K [O-]P([O-])([O-])=O Chemical compound 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[O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims 1
- 238000007598 dipping method Methods 0.000 claims 1
- 239000011261 inert gases Substances 0.000 claims 1
- 238000009413 insulation Methods 0.000 claims 1
- 229910052757 nitrogen Inorganic materials 0.000 claims 1
- 239000001308 nitrogen Substances 0.000 claims 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Chemical compound data:image/svg+xml;base64,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 data:image/svg+xml;base64,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 N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims 1
- 230000003647 oxidation Effects 0.000 claims 1
- 238000007254 oxidation reactions Methods 0.000 claims 1
- 239000010452 phosphate Substances 0.000 claims 1
- 229910052751 metals Inorganic materials 0.000 description 2
- 239000002184 metals Substances 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 281000158604 Steel mill companies 0.000 description 1
- 241000251734 Torpedo Species 0.000 description 1
- 239000000919 ceramics Substances 0.000 description 1
- 238000006243 chemical reactions Methods 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 239000000463 materials Substances 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/08—Making cast-iron alloys
- C22C33/10—Making cast-iron alloys including procedures for adding magnesium
-
- 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
- C21C1/02—Dephosphorising or desulfurising
-
- 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
- C21C1/10—Making spheroidal graphite cast-iron
-
- 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
-
- 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
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/064—Dephosphorising; Desulfurising
Description
The present invention relates to a process for the desulfurization of large quantities of pig iron, steel or cast iron melts, the application of the process to melts with an initial sulfur content of 0.01 to 0.25%, preferably by 0.04%, and a treatment vessel for Execution of the procedure.
It is known to use magnesium in pure or alloyed form for the intensive desulfurization of pig iron, steel or cast iron. The magnesium is introduced by known methods using various types of metal or ceramic immersion devices.
Most of the proposals are either difficult to implement in operational terms, are too costly, are too inefficient, or have other disadvantages. The process known from DT-OS 1 815 214 for introducing magnesium into a melt leads to an effective desulfurization of the treated melt, but is limited to quantities of 5 to 10, maximum 15, tons and with high temperature losses due to long Waiting times between the individual treatments.
The present invention has for its object to provide a method which enables the desulfurization of pig iron, steel or cast iron melts even in large quantities and without the disadvantages mentioned.
The method according to the invention is characterized in that a pure magnesium-containing molded body consisting of a refractory mass, which is closed on all sides except for contact openings in the lower and upper region of the molded body, is brought into contact with the melt, the molded body being destroyed.
A variant of the method according to the invention consists in that a shaped body reinforced with wire mesh, for example in the form of a cylinder or truncated cone, can be used from a phosphate-bonded mass which has hardened below 400 ° C. The method according to the invention can be applied in particular to melts with an initial sulfur content of 0.01 to 0.25%, preferably around 0.04%, whereby according to a variant of the method according to the invention the achievable final sulfur content can be less than 0.01%.
The invention further comprises a treatment vessel for carrying out the method, characterized by a cover in which a flow opening for the molten metal is present. The lid of the treatment vessel can be designed with a siphon that retains the pan slag.
The invention is explained in more detail below using an example:
example
One or more 30 to 40 liter moldings, which consist of a phosphate-bonded mass hardened below 400 ° C and are filled with pure magnesium, are fastened in an empty cast iron pan near the floor. Fastening is carried out by means of a fastening rod guided through the pan spout, screwed to the pan base or by means of a plug rod. The pan is now provided with a lid in which there is a flow opening for pig iron. The pan lid can also be used to fix the moldings to the floor by means of a refractory-coated rod attached to the lid.
The pig iron pan is moved under the tapping pan, mixer or torpedo pan and about half filled with pig iron. With a ton of pig iron, the reaction that now begins takes about 40 seconds. After the reaction time, the pan is filled, the lid is removed and the pan is moved to the deslagging device.
5
10th
15
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35
40
45
50
55
60
65
3rd
638 242
The following advantages can generally be achieved with the method according to the present invention:
Even with a high initial sulfur content, accurate desulfurization to less than 0.01% S can be achieved. The treatment times can be adapted to the operational conditions. The fact that the molded body is used only once results in simple handling.
The amount of slag is low because only small amounts of pure magnesium are added. Slagging results in only minor iron losses. The method according to the invention can be integrated into the material flow of the steelworks and permits the rapid successive treatment of iron quantities even over 50 tons without long waiting times and thus without correspondingly high temperature losses, i.e. without disrupting the operational process.
Claims (18)
- 638 242
- 2. The method according to claim 1, characterized in that the oxidation of free magnesium over the bath is prevented by means of an inert gas, for example with nitrogen.2ndPATENT CLAIMSProcess for the desulfurization of large quantities of pig iron, steel or cast iron melts, characterized in that a pure magnesium-containing molded body consisting of a refractory mass, which is closed on all sides except for contact openings in the lower and upper region of the molded body, with the melt in Is brought into contact, and the molded body is destroyed.
- 3. The method according to claim 1, characterized in that the shaped body is mesh-reinforced or fiber-reinforced.
- 4. The method according to claim 1 to 3, characterized in that the molded body is fixed before pouring in an empty treatment pan near the bottom.
- 5. The method according to claim 1 to 4, characterized in that the molded body is fastened to the pan base by means of a fastening rod guided through the pan spout.
- 6. The method according to claim 1 to 4, characterized in that the shaped body is held or introduced by means of a stopper rod on the floor.
- 7. The method according to claim 1 to 3, characterized in that the molded body is introduced via a dipping device.
- 8. The method according to claim 1 to 7, characterized in that the treatment time is less than 10 minutes, preferably less than 1 minute.
- 9. The method according to claim 1 to 8, characterized in that the shaped body has a volume between 5 to 100 liters, preferably 20 to 80 liters.
- 10. The method according to claim 1 to 9, characterized in that the volume ratio of pure magnesium: molded body is at least 0.20.
- 11. The method according to claim 1 to 10, characterized in that the final sulfur content of the treated melt is less than 0.01% S.
- 12. The method * "di claims 1 to 11, characterized in that the reaction time can be controlled by appropriate dimensioning of the diameter of the contact openings in the lower region of the molded body.
- 13. The method according to claim 1 to 12, characterized in that the shaped body is cylindrical or frustoconical in shape with an upwardly oriented frustum base.
- 14. The method according to any one of claims 1 to 3, characterized in that the truncated cone base of the shaped body is designed as an upper cover which is fastened in the form of a fireclay cone after filling the shaped body with the magnesium.
- 15. The method according to claim 5, characterized in that the rod is provided with insulation in the melt region.
- 16. The method according to any one of claims 1 to 15, characterized in that a single contact opening is present in the lower region of the molded body.
- 17. The method according to any one of claims 1 to 16, characterized in that the shaped body consists of a phosphate-bound mass hardened at 400 ° C.
- 18. Application of the method according to claim 1 to melts with an initial sulfur content of 0.01 to 0.25%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH13278A CH638242A5 (en) | 1978-01-06 | 1978-01-06 | Method for desulfuring large quantities of melting iron, steel or cast iron. |
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH13278A CH638242A5 (en) | 1978-01-06 | 1978-01-06 | Method for desulfuring large quantities of melting iron, steel or cast iron. |
| EP78101809A EP0003037A1 (en) | 1978-01-06 | 1978-12-21 | Method, apparatus and agent for the treatment of molten ferrous metals with a pure alkali or alkaline-earth metal in solid form |
| PCT/CH1978/000056 WO1979000481A1 (en) | 1978-01-06 | 1978-12-27 | Method,apparatus and means for treating melted iron with an alkali or earth alkali metal |
| ZA7949A ZA7900049B (en) | 1978-01-06 | 1979-01-05 | Process device and means for the treatment of iron metals with a solid pure metal of the alkaline and alkaline earth type |
| CA000319252A CA1119413A (en) | 1978-01-06 | 1979-01-08 | Process and a device for the treatment of an iron melt |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CH638242A5 true CH638242A5 (en) | 1983-09-15 |
Family
ID=4179976
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH13278A CH638242A5 (en) | 1978-01-06 | 1978-01-06 | Method for desulfuring large quantities of melting iron, steel or cast iron. |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP0003037A1 (en) |
| CA (1) | CA1119413A (en) |
| CH (1) | CH638242A5 (en) |
| WO (1) | WO1979000481A1 (en) |
| ZA (1) | ZA7900049B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3021707A1 (en) * | 1980-06-10 | 1981-12-17 | Kloeckner Humboldt Deutz Ag | DEVICE FOR IMPORTING HIGHLY REACTIVE ADDITIVES INTO A METAL MELT |
| FR2493873B1 (en) * | 1980-11-07 | 1986-03-28 | Dunn Jr Edward | Process for cleaning steel in cast pocket |
| CH656399A5 (en) * | 1981-05-08 | 1986-06-30 | Fischer Ag Georg | Dive evaporation chamber. |
| CS265400B1 (en) * | 1987-09-24 | 1989-10-13 | Jaroslav Ing Csc Polak | Process for adding evaporable and meltable additives in melt ferrous alloys and device for making this process |
| US5871687A (en) * | 1997-08-04 | 1999-02-16 | Insul Company, Inc. | Consumable recharging box |
| CN107326146B (en) * | 2017-07-08 | 2019-05-17 | 上海艾诺特殊钢铸造有限公司 | The method of a small amount of low-density volatile metal is introduced into small-sized molten steel furnace |
| CN107419058B (en) * | 2017-08-18 | 2019-06-07 | 陕西中钒昌盛新材料科技有限公司 | The method of a small amount of low-density volatile metal is added in molten steel |
| CN107460275B (en) * | 2017-08-18 | 2019-05-03 | 启东市聚旺铸造有限公司 | The method of a small amount of low-density volatile metal is added in molten steel |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1869925A (en) * | 1930-09-24 | 1932-08-02 | Hugh C Sicard | Article for introducing materials in a metallurgical bath |
| DE1021395B (en) * | 1952-06-17 | 1957-12-27 | Metallgesellschaft Ag | Process for the production of spheroidal graphite cast iron |
| CH331292A (en) * | 1952-10-27 | 1958-07-15 | Mond Nickel Co Ltd | Process for the production of cast iron |
| GB874181A (en) * | 1958-10-28 | 1961-08-02 | Mannesmann Ag | Method and apparatus for the addition of deoxidising and alloying elements to molten metal baths |
| DE1939246A1 (en) * | 1969-08-01 | 1971-02-11 | Koerver & Nehring Gmbh Maschin | Reaction vessel for the prep of spheroidal - cast iron |
| GB1404011A (en) * | 1972-06-21 | 1975-08-28 | Foseco Int | Apparatus for introducing volatile materials into metal melts |
| US3942775A (en) * | 1973-04-02 | 1976-03-09 | Labate Michael D | Submerged desulphurization device and method |
| US3934862A (en) * | 1973-04-12 | 1976-01-27 | Labate Michael D | Device for supplying a treating agent to molten metal in a ladle |
| DE2533246C2 (en) * | 1975-07-25 | 1983-01-13 | Skw Trostberg Ag, 8223 Trostberg, De | |
| US4060407A (en) * | 1975-08-25 | 1977-11-29 | Reactive Metals & Alloys Corporation | Methods and apparatus for adding mischmetal to molten steel |
| SE7611368L (en) * | 1975-10-15 | 1977-04-16 | Tarek El Gammal | CARRIER BODY FOR INFORMATION OF REACTIVITY IN METAL MELTOR |
| DE2558072C3 (en) * | 1975-12-22 | 1978-09-21 | Micheal Donald Ellwood City Pa. Labate (V.St.A.) | |
| CA1096179A (en) * | 1977-01-18 | 1981-02-24 | Kirk D. Miller | Molten metal treatment |
| DD128912A5 (en) * | 1977-03-23 | 1977-12-14 | Foseco Trading Ag | Trakerkoerper for supplements to metal melts |
-
1978
- 1978-01-06 CH CH13278A patent/CH638242A5/en not_active IP Right Cessation
- 1978-12-21 EP EP78101809A patent/EP0003037A1/en not_active Ceased
- 1978-12-27 WO PCT/CH1978/000056 patent/WO1979000481A1/en unknown
-
1979
- 1979-01-05 ZA ZA7949A patent/ZA7900049B/en unknown
- 1979-01-08 CA CA000319252A patent/CA1119413A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| ZA7900049B (en) | 1980-01-30 |
| CA1119413A (en) | 1982-03-09 |
| WO1979000481A1 (en) | 1979-07-26 |
| CA1119413A1 (en) | |
| EP0003037A1 (en) | 1979-07-25 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PL | Patent ceased |