GB486908A - Improvements in the manufacture of ferrous alloys - Google Patents
Improvements in the manufacture of ferrous alloysInfo
- Publication number
- GB486908A GB486908A GB1440337A GB1440337A GB486908A GB 486908 A GB486908 A GB 486908A GB 1440337 A GB1440337 A GB 1440337A GB 1440337 A GB1440337 A GB 1440337A GB 486908 A GB486908 A GB 486908A
- Authority
- GB
- United Kingdom
- Prior art keywords
- mixture
- layer
- barium
- nitrate
- crucible
- 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
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
- C22B5/04—Dry methods smelting of sulfides or formation of mattes by aluminium, other metals or silicon
-
- 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
- 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
- C22B5/06—Dry methods smelting of sulfides or formation of mattes by carbides or the like
-
- 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
Abstract
In producing ferrous alloys by the metallothermic reduction of magnetic iron oxide, the materials constituting the charge, including the alloying metals and oxydizing agents, are dried by heating to at least 100 DEG C. before introduction into the crucible in which the reaction is effected, thereby eliminating blisters in the steel produced. The magnetic oxide of iron may be magnetite, roasted iron scales, or a mixture of these. The oxydizing agents may consist of salts of the alkaline earth metals, particularly barium dioxide or barium nitrate, or of mixtures such as potassium nitrate, barium nitrate, and barium oxide. In an example, a mixture is made of magnetite, roasted iron scales, aluminium, potassium nitrate, barium nitrate, and barium dioxide, all ground and dried previous to mixing. A second mixture is formed of dried potassium nitrate, ferro - chromium, and nickel. The mixtures are, if necessary, passed through a grinder-mixer, and both are maintained in a dry atmosphere at at least 100 DEG C. The crucible, also heated to at least 100 DEG C., is charged with a layer of the first mixture, then with a layer formed of an intimate admixture of the first and second mixtures, and finally a layer of the first mixture. Ordinary carbon steel or pig iron scrap is distributed partly on top of the second layer and partly in the top layer. The reaction is started in known manner by an ignition cartridge in the charge, and containing for example aluminium powder, barium dioxide, and magnesium powder. To refine the steel, the ladle into which it is poured may contain a charge of manganese and aluminium; alternatively, above the first layer in the crucible may be placed three superposed layers consisting respectively of manganese, a portion of the first mixture, and another of manganese. In a second example, the charge in the crucible is formed by a layer of a mixture of magnetite, aluminium, potassium nitrate, titanium oxide, barium nitrate, and barium dioxide, a second layer of manganese, a third of a mixture of ferro-molybdenum and silicon, a fourth layer of the first mixture with carbon steel scrap and fragments of pig iron distributed in it, and a top layer of the first mixture alone. Drying is carried out as in the first example.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR486908X | 1937-03-12 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB486908A true GB486908A (en) | 1938-06-13 |
Family
ID=8904040
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1440337A Expired GB486908A (en) | 1937-03-12 | 1937-05-24 | Improvements in the manufacture of ferrous alloys |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB486908A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2452091A (en) * | 1942-11-23 | 1948-10-26 | David L Woodberry | Incendiary material |
CN115181872A (en) * | 2022-07-15 | 2022-10-14 | 承德天大钒业有限责任公司 | Aluminum tin zirconium molybdenum silicon intermediate alloy and preparation method thereof |
-
1937
- 1937-05-24 GB GB1440337A patent/GB486908A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2452091A (en) * | 1942-11-23 | 1948-10-26 | David L Woodberry | Incendiary material |
CN115181872A (en) * | 2022-07-15 | 2022-10-14 | 承德天大钒业有限责任公司 | Aluminum tin zirconium molybdenum silicon intermediate alloy and preparation method thereof |
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