GB1040443A - Treatment of chromite - Google Patents
Treatment of chromiteInfo
- Publication number
- GB1040443A GB1040443A GB1692562A GB1692562A GB1040443A GB 1040443 A GB1040443 A GB 1040443A GB 1692562 A GB1692562 A GB 1692562A GB 1692562 A GB1692562 A GB 1692562A GB 1040443 A GB1040443 A GB 1040443A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pellets
- ore
- weight
- reducing agent
- carbonaceous reducing
- 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
- C22B34/00—Obtaining refractory metals
- C22B34/30—Obtaining chromium, molybdenum or tungsten
- C22B34/32—Obtaining chromium
-
- 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
-
- 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)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
Chromite ore is pelletized and the pellets are heated with a carbonaceous reducing agent, which provides carbon up to 10% of the weight of the ore, and reduced iron is removed therefrom. The ore may be ground to 70% less than 200 mesh B.S.S. before pelletization. The carbonaceous reducing agent may be coal, charcoal, graphite or organic compounds which decompose to yield carbon, e.g. starch, molasses or tar. The carbonaceous reducing agent may be ground to the same particle size as the ore, mixed therewith, and incorporated in the pellets. Pellets may be formed using binding agents, e.g. sodium or calcium chloride, sodium carbonate, or the above-mentioned organic compounds. The carbonaceous reducing agent may provide an amount of carbon which is from 2-6% of the weight of the ore or from 10-40% of the weight of the metallic iron content of the ore. The pellets may be heated to a temperature in the range of 1000-1450 DEG C. Reduced iron may be removed from the pellets by acid leaching, e.g. using sulphuric acid having a strength of 5-10% v./v. In a typical example, chromite was mixed with 2% graphite by weight and pelletized using 5% sodium chloride solution as binding agent. The pellets were heated in a shaft furnace at 1340 DEG C. for 2 1/2 minutes and quenched in 10% v./v. aqueous sulphuric acid for 2 1/2 hours at room temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1692562A GB1040443A (en) | 1962-05-02 | 1962-05-02 | Treatment of chromite |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1692562A GB1040443A (en) | 1962-05-02 | 1962-05-02 | Treatment of chromite |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1040443A true GB1040443A (en) | 1966-08-24 |
Family
ID=10086135
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1692562A Expired GB1040443A (en) | 1962-05-02 | 1962-05-02 | Treatment of chromite |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1040443A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2168170A1 (en) * | 1972-01-19 | 1973-08-31 | Pechiney Ugine Kuhlmann | Reducing chrome ore - agglomerated with carbon |
| DE3415105A1 (en) * | 1984-04-21 | 1985-10-31 | Metallgesellschaft Ag, 6000 Frankfurt | Process for treating chromite ores |
| WO1989008724A1 (en) * | 1988-03-14 | 1989-09-21 | Showa Denko Kabushiki Kaisha | Reduced chromium-ore bearing powder and method for producing the same |
| WO2018201218A1 (en) | 2017-05-02 | 2018-11-08 | Her Majesty The Queen In Right Of Canada As Represented By The Minister Of Natural Resources | Carbothermic direct reduction of chromite using a catalyst for the production of ferrochrome alloy |
-
1962
- 1962-05-02 GB GB1692562A patent/GB1040443A/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2168170A1 (en) * | 1972-01-19 | 1973-08-31 | Pechiney Ugine Kuhlmann | Reducing chrome ore - agglomerated with carbon |
| DE3415105A1 (en) * | 1984-04-21 | 1985-10-31 | Metallgesellschaft Ag, 6000 Frankfurt | Process for treating chromite ores |
| WO1989008724A1 (en) * | 1988-03-14 | 1989-09-21 | Showa Denko Kabushiki Kaisha | Reduced chromium-ore bearing powder and method for producing the same |
| WO2018201218A1 (en) | 2017-05-02 | 2018-11-08 | Her Majesty The Queen In Right Of Canada As Represented By The Minister Of Natural Resources | Carbothermic direct reduction of chromite using a catalyst for the production of ferrochrome alloy |
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