GB496999A - Process for dressing iron ores - Google Patents
Process for dressing iron oresInfo
- Publication number
- GB496999A GB496999A GB9871/37A GB987137A GB496999A GB 496999 A GB496999 A GB 496999A GB 9871/37 A GB9871/37 A GB 9871/37A GB 987137 A GB987137 A GB 987137A GB 496999 A GB496999 A GB 496999A
- Authority
- GB
- United Kingdom
- Prior art keywords
- constituents
- iron
- furnace
- rich
- operated
- 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
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/02—Roasting processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B1/00—Conditioning for facilitating separation by altering physical properties of the matter to be treated
- B03B1/02—Preparatory heating
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
A modification of the process described in the parent Specification for dressing iron ores consists in so adjusting the nature of the reducing atmosphere, the time, and the temperature, that the constituents rich in iron are converted substantially wholly into ferrosoferric oxide. The process may be carried out in a multi-hearth furnace, or preferably in a rotary tube furnace, the heating means at the discharge end of the furnace being operated with an inert flame or acting only as gas supply means, or being turned out, some of the succeeding burners being operated with a reducing flame, and complete burning of the combustible constituents being effected in the upper part of the furnace. Air and gas may be introduced through nozzles projecting into the furnace or through openings in the furnace wall covered by grates. The gases in the reduction zone contain relatively small proportions of combustible constituents, and the length of the reduction zone is such as to ensure the conversion of the iron-bearing constituents into ferroso-ferric oxide when treated for the required time at a suitable temperature. Constituents rich in iron which during the treatment have been separated from those poor in iron and have a different grain size may be removed by screening or blast sifting, and coarse phosphorite and similar constituents may be screened off from the non-magnetic constituents and added to the portion rich in iron.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE496999X | 1936-05-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB496999A true GB496999A (en) | 1938-12-07 |
Family
ID=6545107
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9871/37A Expired GB496999A (en) | 1936-05-07 | 1937-04-07 | Process for dressing iron ores |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB496999A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE971799C (en) * | 1949-11-16 | 1959-10-29 | Heinrich Willersinn | Process to increase the magnetic properties of iron ores |
| GB2147284A (en) * | 1983-09-30 | 1985-05-09 | Petroleo Brasileiro Sa | Process for obtaining a high surface area magnetite concentrate |
-
1937
- 1937-04-07 GB GB9871/37A patent/GB496999A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE971799C (en) * | 1949-11-16 | 1959-10-29 | Heinrich Willersinn | Process to increase the magnetic properties of iron ores |
| GB2147284A (en) * | 1983-09-30 | 1985-05-09 | Petroleo Brasileiro Sa | Process for obtaining a high surface area magnetite concentrate |
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