GB649023A - Production of stainless steel - Google Patents
Production of stainless steelInfo
- Publication number
- GB649023A GB649023A GB3309446A GB3309446A GB649023A GB 649023 A GB649023 A GB 649023A GB 3309446 A GB3309446 A GB 3309446A GB 3309446 A GB3309446 A GB 3309446A GB 649023 A GB649023 A GB 649023A
- Authority
- GB
- United Kingdom
- Prior art keywords
- per cent
- stainless steel
- furnace
- iron
- chromium
- 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
- 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
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Manufacture Of Iron (AREA)
Abstract
A process of producing stainless steel of not more than 0.03 per cent carbon content is characterized by melting in an electric furnace having carbon electrodes a charge consisting essentially of chrome ore disposed along the banks of the furnace only in such amount as to be assimilated in the melting operation, base steel scrap, stainless steel scrap and a material high in iron oxide all disposed in the middle of the furnace and on the chrome ore, thereby forming an iron and chromium rich bath and a supernatant slag including iron and chromium oxides and adding to the slag a silicon-containing reducing agent of low carbon content for recovering the metallic iron and chromium from their oxides. The base steel scrap may be disposed over the furnace bottom, the stainless steel scrap over the ore and the iron oxide-containing material over the base scrap. A further and preferably larger quantity of chrome ore is added during the melt-down of the initial charge. The reducing agent is preferably crushed ferrosilicon substantially relieved of fines and having a low carbon content, e.g. ferrosilicon between about 1 inch and 5 inch screen size. Additions of nickel, copper, tungsten, vanadium, aluminium, titanium, niobium, molybdenum, or zirconium may be made in the furnace or, after tapping the stainless steel, in the ladle. The production of a steel containing 0.029 per cent carbon, 18.02 per cent chromium, 11.68 per cent nickel, 0.62 per cent silicon, 0.8 per cent manganese, about 0.015 per cent each of sulphur and phosphorus and the remainder iron is described. Specifications 428,950 and 437,186 are referred to.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US649023XA | 1945-11-14 | 1945-11-14 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB649023A true GB649023A (en) | 1951-01-17 |
Family
ID=22058981
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3309446A Expired GB649023A (en) | 1945-11-14 | 1946-11-07 | Production of stainless steel |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB649023A (en) |
-
1946
- 1946-11-07 GB GB3309446A patent/GB649023A/en not_active Expired
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