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ES259055A1 - Method of lowering the iron content of chromite ores or concentrates without appreciable lowering of the contained cr2o3 - Google Patents

Method of lowering the iron content of chromite ores or concentrates without appreciable lowering of the contained cr2o3

Info

Publication number
ES259055A1
ES259055A1 ES0259055A ES259055A ES259055A1 ES 259055 A1 ES259055 A1 ES 259055A1 ES 0259055 A ES0259055 A ES 0259055A ES 259055 A ES259055 A ES 259055A ES 259055 A1 ES259055 A1 ES 259055A1
Authority
ES
Spain
Prior art keywords
lowering
ore
cr2o3
concentrates
contained
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
ES0259055A
Other languages
Spanish (es)
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.)
Haalmer Corp
Original Assignee
Haalmer Corp
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 Haalmer Corp filed Critical Haalmer Corp
Publication of ES259055A1 publication Critical patent/ES259055A1/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
    • C22B1/00—Preliminary treatment of ores or scrap
    • C22B1/14—Agglomerating; Briquetting; Binding; Granulating
    • 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
    • C22B34/00—Obtaining refractory metals
    • C22B34/30—Obtaining chromium, molybdenum or tungsten
    • C22B34/32—Obtaining chromium

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)
  • Fuses (AREA)

Abstract

The Fe content is partially extracted from chromite ore by roasting the ore in air at 700-750 DEG C., reducing the Fe2O3 so formed to Fe3O4 and Fe by heating the ore to 1200-1370 DEG C. in the presence of a gaseous reducing agent and leaching the soluble iron. The gaseous reducing agent is produced in situ by mixing the oxidised ore with coal. The reduced ore may be leached with sulphurous acid or weak sulphuric acid. The hot exhaust gases from the reducing stage may be used as the source of heat for the roasting stage. Specification 951,087 is referred to.
ES0259055A 1959-06-18 1960-06-18 Method of lowering the iron content of chromite ores or concentrates without appreciable lowering of the contained cr2o3 Expired ES259055A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US821091A US3105756A (en) 1959-06-18 1959-06-18 Method of lowering the iron content of chromite ores or concentrates without appreciable lowering of the contained cr2o3

Publications (1)

Publication Number Publication Date
ES259055A1 true ES259055A1 (en) 1960-11-16

Family

ID=25232475

Family Applications (1)

Application Number Title Priority Date Filing Date
ES0259055A Expired ES259055A1 (en) 1959-06-18 1960-06-18 Method of lowering the iron content of chromite ores or concentrates without appreciable lowering of the contained cr2o3

Country Status (4)

Country Link
US (1) US3105756A (en)
ES (1) ES259055A1 (en)
GB (1) GB951086A (en)
NO (1) NO115131B (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3219434A (en) * 1962-05-02 1965-11-23 United Internat Res Inc Process for the production of chrome concentrates
US3257198A (en) * 1962-12-21 1966-06-21 Hydrocarbon Research Inc Beneficiation of ore
FR1426349A (en) * 1964-12-17 1966-01-28 Siderurgie Fse Inst Rech Process for the treatment of powdery materials
US3361557A (en) * 1965-03-22 1968-01-02 R N Corp Processes for direct reduction of ironbearing ores, slags and the like
US3816095A (en) * 1972-03-09 1974-06-11 Allied Chem Method for recovering chromium values from chromite ore
DE4236202C2 (en) * 1992-10-27 1994-07-21 Bayer Ag Process for the low-residue and high-consumption production of sodium dichromate

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1196049A (en) * 1916-08-29 von rauschenplat
US153573A (en) * 1874-07-28 Improvement in treating copper ores
US1360666A (en) * 1917-01-23 1920-11-30 Merrill Co Process of extracting copper from its ores
US1403237A (en) * 1919-04-26 1922-01-10 Charles Page Perin Method of treating iron ore for the recovery of chromium
US2123240A (en) * 1935-06-08 1938-07-12 Hammarberg Axel Recovery of valuable metals or metal compounds from complex ores

Also Published As

Publication number Publication date
NO115131B (en) 1968-08-05
US3105756A (en) 1963-10-01
GB951086A (en) 1964-03-04

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