SE7708933L - WAY TO INCREASE THE HARDNESS OF IRON ORE BULLS - Google Patents
WAY TO INCREASE THE HARDNESS OF IRON ORE BULLSInfo
- Publication number
- SE7708933L SE7708933L SE7708933A SE7708933A SE7708933L SE 7708933 L SE7708933 L SE 7708933L SE 7708933 A SE7708933 A SE 7708933A SE 7708933 A SE7708933 A SE 7708933A SE 7708933 L SE7708933 L SE 7708933L
- Authority
- SE
- Sweden
- Prior art keywords
- pellets
- grate
- hooded
- furnace
- zone
- Prior art date
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
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/24—Binding; Briquetting ; Granulating
- C22B1/2413—Binding; Briquetting ; Granulating enduration of pellets
Abstract
PROCESS FOR UPGRADING IRON ORE PELLETS In a process for hardening oxidizable green iron ore pellets in a horizontal grate or a circular grate furnace, said process comprising passing the grate with a bed of pellets thereon along a horizontal path through the furnace wherein said pellets are heated by contact with hot gases, the furnace having a zone in, or downstream of, the area where the peak temperature of the furnace is attained in which zone the average pellets temperature is in the range of about 1100.degree.F to about 2200.degree.F and in which zone the flow of gases is in a downward direction towards the pellets on the grate the improvement comprising: (a) covering the periphery of at least part of the zone with at least two hoods to provide a hooded area on each side of the top of the grate under which the periphery of the grate passes; (b) passing at least one oxygen stream within each hooded area in such a manner that the stream flows in a downward direction towards and through the periphery of the bed of pellets on the grate passing through the hooded areas; (c) passing the periphery of the bed of pellets on the grate through the hooded areas in such a manner that the residence time of such pellets in the hooded areas is at least about 5 seconds. SPECIFICATION
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US71213776A | 1976-08-06 | 1976-08-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SE7708933L true SE7708933L (en) | 1978-02-07 |
Family
ID=24860897
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SE7708933A SE7708933L (en) | 1976-08-06 | 1977-08-05 | WAY TO INCREASE THE HARDNESS OF IRON ORE BULLS |
Country Status (13)
| Country | Link |
|---|---|
| JP (1) | JPS5319120A (en) |
| AU (1) | AU505875B2 (en) |
| BE (1) | BE857556A (en) |
| BR (1) | BR7705179A (en) |
| CA (1) | CA1095255A (en) |
| DE (1) | DE2735370A1 (en) |
| ES (1) | ES461385A1 (en) |
| FI (1) | FI772371A (en) |
| FR (1) | FR2360677A1 (en) |
| NL (1) | NL7708715A (en) |
| NO (1) | NO772759L (en) |
| SE (1) | SE7708933L (en) |
| ZA (1) | ZA774460B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU558199B2 (en) * | 1982-09-16 | 1987-01-22 | Ishihara Sangyo Kaisha Ltd. | Production of magnetic powder |
| US4774012A (en) * | 1986-01-30 | 1988-09-27 | Ishihara Sangyo Kaisha, Ltd. | Cobalt-containing ferromagnetic iron oxide powder and process for producing the same |
-
1977
- 1977-07-22 ZA ZA00774460A patent/ZA774460B/en unknown
- 1977-08-04 CA CA284,069A patent/CA1095255A/en not_active Expired
- 1977-08-05 NL NL7708715A patent/NL7708715A/en not_active Application Discontinuation
- 1977-08-05 DE DE19772735370 patent/DE2735370A1/en active Pending
- 1977-08-05 AU AU27665/77A patent/AU505875B2/en not_active Expired
- 1977-08-05 JP JP9347277A patent/JPS5319120A/en active Pending
- 1977-08-05 BE BE179969A patent/BE857556A/en unknown
- 1977-08-05 BR BR7705179A patent/BR7705179A/en unknown
- 1977-08-05 SE SE7708933A patent/SE7708933L/en not_active Application Discontinuation
- 1977-08-05 ES ES461385A patent/ES461385A1/en not_active Expired
- 1977-08-05 FR FR7724259A patent/FR2360677A1/en not_active Withdrawn
- 1977-08-05 NO NO772759A patent/NO772759L/en unknown
- 1977-08-05 FI FI772371A patent/FI772371A/fi not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| FI772371A (en) | 1978-02-07 |
| AU2766577A (en) | 1979-02-08 |
| AU505875B2 (en) | 1979-12-06 |
| ES461385A1 (en) | 1978-05-16 |
| NO772759L (en) | 1978-02-07 |
| JPS5319120A (en) | 1978-02-22 |
| BE857556A (en) | 1978-02-06 |
| DE2735370A1 (en) | 1978-02-09 |
| ZA774460B (en) | 1978-06-28 |
| NL7708715A (en) | 1978-02-08 |
| BR7705179A (en) | 1978-05-30 |
| CA1095255A (en) | 1981-02-10 |
| FR2360677A1 (en) | 1978-03-03 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| NAV | Patent application has lapsed |
Ref document number: 7708933-2 |