GB1040443A - Treatment of chromite - Google Patents

Treatment of chromite

Info

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
Application number
GB1692562A
Inventor
Enrico Cohen
Wing Kong Ng
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
National Research Development Corp UK
Original Assignee
National Research Development Corp UK
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by National Research Development Corp UK filed Critical National Research Development Corp UK
Priority to GB1692562A priority Critical patent/GB1040443A/en
Publication of GB1040443A publication Critical patent/GB1040443A/en
Expired legal-status Critical Current

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.
GB1692562A 1962-05-02 1962-05-02 Treatment of chromite Expired GB1040443A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (4)

* Cited by examiner, † Cited by third party
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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