GB789036A - Improvements in the production of ferrochromium - Google Patents
Improvements in the production of ferrochromiumInfo
- Publication number
- GB789036A GB789036A GB33233/55A GB3323355A GB789036A GB 789036 A GB789036 A GB 789036A GB 33233/55 A GB33233/55 A GB 33233/55A GB 3323355 A GB3323355 A GB 3323355A GB 789036 A GB789036 A GB 789036A
- Authority
- GB
- United Kingdom
- Prior art keywords
- chromium
- per cent
- silica
- slag
- ferro
- 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
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
Ferro-chromium is produced by heating chrome ore (e.g chromite) with calcium carbide silica to a temperature of over 1400 DEG C. Chromium-containing material such as converter slag, electric furnace slag, or chromic oxide may be added to enrich the mixture. A two-stage process may be used for ores of low ratio of chromium to iron content, the first stage being a partial reduction to remove iron using a stoichiometric deficiency of the carbide (in admixture with silica), or of carbonaceous agents such as coal, coke, in the presence of slag-forming material such as lime-stone, dolomite or silica. In an example 10 parts of a chrome ore (containing 49 per cent chromic oxide), 3 1/2 parts technical grade calcium carbide (containing 82 per cent Ca C2), and 3 parts silica rock or sand (93 per cent SiO2) were ground to minus 30 mesh, intimately mixed and heated in a silica lined electric arc furnace to 1500 DEG -1600 DEG C., the ferro-chromium forming a molten bath under the fluid slag. A typical alloy contains 49.3 per cent Cr, 1.5 per cent C, 8.5 per cent Si and the balance Fe apart from small amounts of impurities such as Al, V, Ti. Such alloy may be further treated with more chromite and/or chromium enriched material in an electric or other furnace at 1400 DEG C. or higher to produce a low carbon ferro-chromium.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ZA789036X | 1954-12-03 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB789036A true GB789036A (en) | 1958-01-15 |
Family
ID=25573879
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB33233/55A Expired GB789036A (en) | 1954-12-03 | 1955-11-21 | Improvements in the production of ferrochromium |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB789036A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1213452B (en) * | 1960-04-04 | 1966-03-31 | Elektrometallurgie M B H Ges | Process for decarburizing silicon-containing ferro alloys |
| CN110373603A (en) * | 2019-08-30 | 2019-10-25 | 攀钢集团攀枝花钢铁研究院有限公司 | The method that vananum fine powder is used for vanadium iron spray refining |
-
1955
- 1955-11-21 GB GB33233/55A patent/GB789036A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1213452B (en) * | 1960-04-04 | 1966-03-31 | Elektrometallurgie M B H Ges | Process for decarburizing silicon-containing ferro alloys |
| CN110373603A (en) * | 2019-08-30 | 2019-10-25 | 攀钢集团攀枝花钢铁研究院有限公司 | The method that vananum fine powder is used for vanadium iron spray refining |
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