GB514491A - Improvements in or relating to the decarbonization of carboncontaining metals and ferro-alloys - Google Patents
Improvements in or relating to the decarbonization of carboncontaining metals and ferro-alloysInfo
- Publication number
- GB514491A GB514491A GB13319/38A GB1331938A GB514491A GB 514491 A GB514491 A GB 514491A GB 13319/38 A GB13319/38 A GB 13319/38A GB 1331938 A GB1331938 A GB 1331938A GB 514491 A GB514491 A GB 514491A
- Authority
- GB
- United Kingdom
- Prior art keywords
- furnace
- ferro
- metals
- granules
- alloys
- 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
-
- 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)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Muffle Furnaces And Rotary Kilns (AREA)
Abstract
514,491. Decarburizing iron &c. RENNERFELT, J., and KALLING, B. M. S. May 4, 1938, No. 13319. Convention date, May 5, 1937. [Class 72] Carbon-containing metals or ferro-alloys in granular form are decarburized by heating them in a rotating tubular furnace to a non- melting temperature and blowing air or oxygen containing gas directly on to the inclined surface of the charge and away from the upper furnace wall and in amounts causing incomplete oxidation of carbon monoxide generated from the metals in close proximity to the hot metallic grains. The heat necessary for heating the charge is produced for the major part by the exothermic oxidation of the carbon monoxide. The velocity of the inner surface of the wall is maintained at not less than 5 metres per minute and the furnace is filled to at least 25 per cent. of its cross-section in the hottest zone of the furnace: The decarburization mav be effected to produce a superficial oxidation of the granules an additional reduction of the carbon content then taking place when the product is subsequently melted. The granules may be classified in size before and/or after treatment and may be mixed with iron oxide. The metallic granules are fed through an opening 3 into the rotating furnace 1 and air is fed by a pipe 6 eccentrically located in the opening 3 and provided with nozzles 7 directed downwards. Within the tube 6 is located a tube 8 through which may be introduced a fuel gas which is thus admitted into the final decarburizing zone of the furnace. Fuel gas may also be admitted through a pipe 9 placed in the exit 5 of the furnace. The decarburized granules pass through a cooling device 10 provided with baffles 11 having apertures 12 therein and immersed in a tank 13. The process may be applied to metals such as iron, nickel, cobalt and molybdenum and to ferro-alloys such as ferro-molybdenum, ferrotitanium and ferro-vanadium. Specifications 484,662 and 504,122 are referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE514491X | 1937-05-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB514491A true GB514491A (en) | 1939-11-09 |
Family
ID=20311052
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB13319/38A Expired GB514491A (en) | 1937-05-05 | 1938-05-04 | Improvements in or relating to the decarbonization of carboncontaining metals and ferro-alloys |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB514491A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2541153A (en) * | 1949-04-12 | 1951-02-13 | Union Carbide & Carbon Corp | Method of decarburizing highcarbon ferrochromium |
| DE973647C (en) * | 1952-06-14 | 1960-04-21 | Huettenwerk Oberhausen Ag | Process for the preliminary and final refining of metals, in particular pig iron |
-
1938
- 1938-05-04 GB GB13319/38A patent/GB514491A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2541153A (en) * | 1949-04-12 | 1951-02-13 | Union Carbide & Carbon Corp | Method of decarburizing highcarbon ferrochromium |
| DE973647C (en) * | 1952-06-14 | 1960-04-21 | Huettenwerk Oberhausen Ag | Process for the preliminary and final refining of metals, in particular pig iron |
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