GB789093A - Improvements in or relating to the production of low carbon ferrochromium - Google Patents
Improvements in or relating to the production of low carbon ferrochromiumInfo
- Publication number
- GB789093A GB789093A GB16308/55A GB1630855A GB789093A GB 789093 A GB789093 A GB 789093A GB 16308/55 A GB16308/55 A GB 16308/55A GB 1630855 A GB1630855 A GB 1630855A GB 789093 A GB789093 A GB 789093A
- Authority
- GB
- United Kingdom
- Prior art keywords
- chromium
- carbon
- ferro
- briquettes
- chromite ore
- 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
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D3/00—Diffusion processes for extraction of non-metals; Furnaces therefor
- C21D3/02—Extraction of non-metals
- C21D3/04—Decarburising
-
- 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
- C21C7/068—Decarburising
- C21C7/0685—Decarburising of stainless steel
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C35/00—Master alloys for iron or steel
- C22C35/005—Master alloys for iron or steel based on iron, e.g. ferro-alloys
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Carbon And Carbon Compounds (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
High carbon ferro-chromium is decarburized by heating a charge comprising finely divided high carbon ferro-chromium and finely divided chromite ore under subatmospheric pressure at a temperature high enough to oxidize the carbon of the high carbon ferro-chromium and removing the oxide of carbon formed. The high carbon ferro-chromium may contain 6-8 per cent carbon which may be reduced by the process to 0.01 per cent. The chromite ore may be used raw or may be heat treated e.g. roasted or sintered. The ferro-chromium and the chromite ore may be ground to pass a 200 mesh sieve and thoroughly mixed before being formed into briquettes with a binder, e.g. dextrin or sulphite liquor. The briquettes may be dried and then heated in a vacuum, e.g. 110 microns, until there is no further reaction between carbon and oxygen. Slag forming materials may be present and the briquettes may include a catalyst e.g. fluorspar. The low carbon ferro-chromium produced may be used as an addition in the manufacture of chromium steels.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US789093XA | 1954-06-16 | 1954-06-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB789093A true GB789093A (en) | 1958-01-15 |
Family
ID=22146944
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB16308/55A Expired GB789093A (en) | 1954-06-16 | 1955-06-07 | Improvements in or relating to the production of low carbon ferrochromium |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB789093A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2514785A1 (en) * | 1981-10-19 | 1983-04-22 | Mineral Tech Council | PROCESS FOR REFINING FERROCHROME |
-
1955
- 1955-06-07 GB GB16308/55A patent/GB789093A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2514785A1 (en) * | 1981-10-19 | 1983-04-22 | Mineral Tech Council | PROCESS FOR REFINING FERROCHROME |
| WO1983001462A1 (en) * | 1981-10-19 | 1983-04-28 | Ferrohome Ltd | Process of refining ferrochromium metal |
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