FI101787B - Förfarande för rening av gips - Google Patents

Förfarande för rening av gips Download PDF

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Publication number
FI101787B
FI101787B FI955761A FI955761A FI101787B FI 101787 B FI101787 B FI 101787B FI 955761 A FI955761 A FI 955761A FI 955761 A FI955761 A FI 955761A FI 101787 B FI101787 B FI 101787B
Authority
FI
Finland
Prior art keywords
gypsum
impurities
strong magnetic
process according
magnetic
Prior art date
Application number
FI955761A
Other languages
English (en)
Finnish (fi)
Other versions
FI101787B1 (sv
FI955761A0 (sv
FI955761A (sv
Inventor
Kari Lehtinen
Hannu Aeijaelae
Veikko Myllylae
Jukka Karhunen
Original Assignee
Kemira Oyj
Kemira Growhow Oy
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 Kemira Oyj, Kemira Growhow Oy filed Critical Kemira Oyj
Priority to FI955761A priority Critical patent/FI101787B1/sv
Publication of FI955761A0 publication Critical patent/FI955761A0/sv
Priority to NL1004650A priority patent/NL1004650C2/nl
Publication of FI955761A publication Critical patent/FI955761A/sv
Application granted granted Critical
Publication of FI101787B publication Critical patent/FI101787B/sv
Publication of FI101787B1 publication Critical patent/FI101787B1/sv

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/30—Sulfur-, selenium- or tellurium-containing compounds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C1/00—Magnetic separation
    • B03C1/002—High gradient magnetic separation
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
    • C01F11/00—Compounds of calcium, strontium, or barium
    • C01F11/46—Sulfates
    • C01F11/468—Purification of calcium sulfates
    • 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
    • C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
    • C22B7/005—Separation by a physical processing technique only, e.g. by mechanical breaking
    • 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)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Metallurgy (AREA)
  • Environmental & Geological Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Inorganic Chemistry (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)

Claims (7)

1. Förfarande för rengörning av gips säsom fosfogips och gips som uppstar vid reningen av och rökgas 5 kännetecknat av att de i gipsen förekommande fö-reningarna ur tungmetall- och lantanidgruppen avlägsnas med hjälp av starkmagnetisk separation.
2. Förfarande enligt patentkrav 1 kännetecknat 10 av att vid den starkmagnetiska separationen används ett mag- netflöde vars täthet är större än 1 Tesla, fördelaktigt mel-lan 1,5 och 2,5 Tesla.
3. Förfarande enligt patentkrav 1 kännetecknat 15 av att gipsen tillförs separeringsapparaten i slamform och vars fastämnesprocent är 1-50 %, fördelaktigt 20-30 %.
4. Förfarande enligt patentkrav 1 kännetecknat av att ur gipsen avlägsnas vid den starkmagnetiska separatio-20 nen tungmetallföreningar, särskilt Cu, Ni, Zn, Pb, Cr, och Co.
5. Förfarande enligt patentkrav 1 kännetecknat av att ur gipsen avlägsnas vid den starkmagnetiska separatio-25 nen föroreningar som hör tili lantanidgruppen, särkilt La, Ce och Nd samt Y.
6. Förfarande enligt nagot av patentkraven 1-5 för användning av gipsen som bestrykning- och/eller fyllnadsämne för papper. 30
7. Förfarande enligt nagot av patentkraven 1-5 för användning av gips i byggnadsmaterial.
FI955761A 1995-11-29 1995-11-29 Förfarande för rening av gips FI101787B1 (sv)

Priority Applications (2)

Application Number Priority Date Filing Date Title
FI955761A FI101787B1 (sv) 1995-11-29 1995-11-29 Förfarande för rening av gips
NL1004650A NL1004650C2 (nl) 1995-11-29 1996-11-29 Werkwijze voor het zuiveren van gips.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI955761A FI101787B1 (sv) 1995-11-29 1995-11-29 Förfarande för rening av gips
FI955761 1995-11-29

Publications (4)

Publication Number Publication Date
FI955761A0 FI955761A0 (sv) 1995-11-29
FI955761A FI955761A (sv) 1997-05-30
FI101787B true FI101787B (sv) 1998-08-31
FI101787B1 FI101787B1 (sv) 1998-08-31

Family

ID=8544461

Family Applications (1)

Application Number Title Priority Date Filing Date
FI955761A FI101787B1 (sv) 1995-11-29 1995-11-29 Förfarande för rening av gips

Country Status (2)

Country Link
FI (1) FI101787B1 (sv)
NL (1) NL1004650C2 (sv)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009125064A1 (en) * 2008-04-09 2009-10-15 Kemira Oyj Method of purifying gypsum
WO2015075317A1 (en) 2013-11-22 2015-05-28 Teknologian Tutkimuskeskus Vtt Oy Method for recovering rare earth metals from waste sulphates

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2695678B2 (ja) * 1990-06-20 1998-01-14 三菱重工業株式会社 排煙脱硫方法

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009125064A1 (en) * 2008-04-09 2009-10-15 Kemira Oyj Method of purifying gypsum
WO2015075317A1 (en) 2013-11-22 2015-05-28 Teknologian Tutkimuskeskus Vtt Oy Method for recovering rare earth metals from waste sulphates
EP3071719A4 (en) * 2013-11-22 2017-08-09 Teknologian Tutkimuskeskus VTT OY Method for recovering rare earth metals from waste sulphates

Also Published As

Publication number Publication date
FI101787B1 (sv) 1998-08-31
FI955761A0 (sv) 1995-11-29
NL1004650A1 (nl) 1997-06-17
NL1004650C2 (nl) 1998-12-08
FI955761A (sv) 1997-05-30

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