RU94044672A - Method and apparatus for producing water-soluble chromium compounds - Google Patents

Method and apparatus for producing water-soluble chromium compounds

Info

Publication number
RU94044672A
RU94044672A RU94044672/02A RU94044672A RU94044672A RU 94044672 A RU94044672 A RU 94044672A RU 94044672/02 A RU94044672/02 A RU 94044672/02A RU 94044672 A RU94044672 A RU 94044672A RU 94044672 A RU94044672 A RU 94044672A
Authority
RU
Russia
Prior art keywords
water
producing water
chromium compounds
soluble chromium
compounds
Prior art date
Application number
RU94044672/02A
Other languages
Russian (ru)
Other versions
RU2096511C1 (en
Inventor
Бруццоне Джузеппе
It]
Перроне Диего
Бруно Джакомо
Original Assignee
Луиджи Стоппани С.П.А. (IT)
Луиджи Стоппани С.П.А.
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 Луиджи Стоппани С.П.А. (IT), Луиджи Стоппани С.П.А. filed Critical Луиджи Стоппани С.П.А. (IT)
Publication of RU94044672A publication Critical patent/RU94044672A/en
Application granted granted Critical
Publication of RU2096511C1 publication Critical patent/RU2096511C1/en

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
    • C22B5/00—General methods of reducing to metals
    • C22B5/02—Dry methods smelting of sulfides or formation of mattes
    • C22B5/08—Dry methods smelting of sulfides or formation of mattes by sulfides; Roasting reaction methods
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Metallurgy (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Processing Of Solid Wastes (AREA)
  • Treatment Of Water By Oxidation Or Reduction (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Inorganic Compounds Of Heavy Metals (AREA)
  • Removal Of Specific Substances (AREA)

Abstract

FIELD: reduction of hexavalent chromium in chromium production waste ground. SUBSTANCE: method involves mixing residual products with at least one reducer and performing indirect oxygen-free heating of mixture to provide transformation of water-soluble compounds into water-insoluble compounds. EFFECT: increased efficiency, simplified accomplishment and wider operational capabilities.

Claims (1)

Изобретение относится к новому способу и установке для восстановления шестивалентного хрома, содержащегося в образованных землях после производства хрома, при этом для того, чтобы обеспечить преобразование водорастворимых соединений в водонерастворимые соединения, способ включает этапы смешивания упомянутых остаточных продуктов с одним или более восстановителем и косвенного нагрева упомянутой смеси, по существу, без присутствия кислорода.The invention relates to a new method and installation for the reduction of hexavalent chromium contained in the formed land after chromium production, in order to ensure the conversion of water-soluble compounds to water-insoluble compounds, the method includes the steps of mixing said residual products with one or more reducing agents and indirectly heating said mixtures essentially without the presence of oxygen.
RU94044672A 1992-01-21 1992-12-29 Method of preparing water-insoluble chromium compounds RU2096511C1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
ITMI92A000092 1992-01-21
IT92MI92 IT1262918B (en) 1992-01-21 1992-01-21 PROCEDURE AND PLANT FOR THE REDUCTION OF HEXAVALENT CHROMIUM CONTAINED IN THE RESIDUES OF THE PROCESSING OF CHROME MINERALS
ITM192A000092 1992-01-21
PCT/EP1992/003007 WO1993014232A1 (en) 1992-01-21 1992-12-29 Process and plant for the reduction of hexavalent chromium contained in the residue resulting from the processing of chromium minerals

Publications (2)

Publication Number Publication Date
RU94044672A true RU94044672A (en) 1996-08-27
RU2096511C1 RU2096511C1 (en) 1997-11-20

Family

ID=11361603

Family Applications (1)

Application Number Title Priority Date Filing Date
RU94044672A RU2096511C1 (en) 1992-01-21 1992-12-29 Method of preparing water-insoluble chromium compounds

Country Status (14)

Country Link
EP (1) EP0621905A1 (en)
CN (1) CN1074948A (en)
AU (1) AU3347593A (en)
BR (1) BR9207057A (en)
CZ (1) CZ170394A3 (en)
IT (1) IT1262918B (en)
MX (1) MX9300307A (en)
PL (1) PL171592B1 (en)
RO (1) RO110458B1 (en)
RU (1) RU2096511C1 (en)
SK (1) SK84194A3 (en)
TR (1) TR26598A (en)
WO (1) WO1993014232A1 (en)
ZA (1) ZA9343B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE602006004968D1 (en) 2005-02-08 2009-03-12 Cromotecnica Mexico Sa De Cv METHOD AND APPENDIX FOR THE CONVERSION OF CHROMIUM-DANGEROUS WASTE INTO UNFOLLOWED WASTE
DE202008014318U1 (en) 2008-10-28 2010-04-01 Dr. Hahn Gmbh & Co. Kg Band to hinged about a hinge axis connecting a wing to a frame
NO2870107T3 (en) 2012-07-06 2018-06-16

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1055953B (en) * 1976-02-24 1982-01-11 Stoppani P & Co DECONTAMINATION PROCESS OF WASTE MATERIAL COMING FROM THE PROCESSING OF CHROME MINERALS THROUGH WET CONZOLFO TREATMENT
JP2655864B2 (en) * 1988-03-14 1997-09-24 昭和電工株式会社 Method for producing high reduced chromium ore powder

Also Published As

Publication number Publication date
CZ170394A3 (en) 1995-08-16
TR26598A (en) 1995-03-15
MX9300307A (en) 1993-12-01
CN1074948A (en) 1993-08-04
BR9207057A (en) 1995-12-05
AU3347593A (en) 1993-08-03
PL171592B1 (en) 1997-05-30
IT1262918B (en) 1996-07-22
WO1993014232A1 (en) 1993-07-22
ZA9343B (en) 1993-08-05
RU2096511C1 (en) 1997-11-20
EP0621905A1 (en) 1994-11-02
ITMI920092A1 (en) 1993-07-21
SK84194A3 (en) 1995-08-09
RO110458B1 (en) 1996-01-30
ITMI920092A0 (en) 1992-01-21

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Legal Events

Date Code Title Description
MM4A The patent is invalid due to non-payment of fees

Effective date: 20061230