GB1060003A - Process and apparatus for the alkaline roasting of materials containing chromium oxide - Google Patents

Process and apparatus for the alkaline roasting of materials containing chromium oxide

Info

Publication number
GB1060003A
GB1060003A GB38823/63A GB3882363A GB1060003A GB 1060003 A GB1060003 A GB 1060003A GB 38823/63 A GB38823/63 A GB 38823/63A GB 3882363 A GB3882363 A GB 3882363A GB 1060003 A GB1060003 A GB 1060003A
Authority
GB
United Kingdom
Prior art keywords
roasting
cakes
reaction space
chromium oxide
materials containing
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
GB38823/63A
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.)
Zahn and Co GmbH
Original Assignee
Zahn and Co GmbH
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 Zahn and Co GmbH filed Critical Zahn and Co GmbH
Publication of GB1060003A publication Critical patent/GB1060003A/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
    • C01—INORGANIC CHEMISTRY
    • C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
    • C01G37/00—Compounds of chromium
    • C01G37/14—Chromates; Bichromates
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Environmental & Geological Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Inorganic Chemistry (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Compositions Of Oxide Ceramics (AREA)
  • Inorganic Compounds Of Heavy Metals (AREA)

Abstract

In a process for the alkaline roasting of materials containing chromium oxide, the material is pressed into cakes and conveyed, free from mechanical stresses, on a support moving counter-current to the flow of roasting gases through a reaction space the length of which is substantially greater than the height, the temperature in the reaction space increasing in the direction of advance of the material to be roasted to a maximum temperature less than the melting or sintering temperature of the cakes. The flow velocity of the roasting gas may be from 1 to 10 m./sec. The cakes may have thickness up to 50 mm. The roasting may be conducted in a tunnel or canal furnace in which the reaction space is separated from the firing space by a wall of bricks, for example silicon carbide bricks, preferably impregnated with a material having a high melting-point, for example kaolin.
GB38823/63A 1963-01-26 1963-10-02 Process and apparatus for the alkaline roasting of materials containing chromium oxide Expired GB1060003A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEZ9875A DE1194148B (en) 1963-01-26 1963-01-26 Process and device for alkaline roasting of chromium oxide-containing substances

Publications (1)

Publication Number Publication Date
GB1060003A true GB1060003A (en) 1967-02-22

Family

ID=7621090

Family Applications (1)

Application Number Title Priority Date Filing Date
GB38823/63A Expired GB1060003A (en) 1963-01-26 1963-10-02 Process and apparatus for the alkaline roasting of materials containing chromium oxide

Country Status (3)

Country Link
US (1) US3295954A (en)
DE (1) DE1194148B (en)
GB (1) GB1060003A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1239958B (en) 1990-05-09 1993-11-27 Stoppani Luigi Spa PROCESS AND PLANT FOR THE PREPARATION OF ALKALINE CHROMATES FROM CHROME MINERALS
WO2013011521A1 (en) 2011-07-18 2013-01-24 Tata Steel Limited A method for direct reduction of oxidized chromite ore fines composite agglomerates in a tunnel kiln using carbonaceous reductant for production of reduced chromite product/ agglomerates applicable in ferrochrome or charge chrome production.

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1039706A (en) * 1910-05-27 1912-10-01 Carl Dellwik Method of and apparatus for agglomerating fine ores, metalliferous residues, &c.
US1153203A (en) * 1914-04-15 1915-09-14 Grasselli Chemical Co Method of treating ores.
US1828756A (en) * 1927-04-16 1931-10-27 Ig Farbenindustrie Ag Process for the refining of chromium ores
US2252714A (en) * 1937-06-29 1941-08-19 Harriet L Hall Process and apparatus for making metal powder
US2805140A (en) * 1951-03-09 1957-09-03 American Potash & Chem Corp Briquette of synthetic chromium ore

Also Published As

Publication number Publication date
US3295954A (en) 1967-01-03
DE1194148B (en) 1965-06-03

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