FR2382406A1 - Neutralising acid contg. liquors esp. metal cleaning liquors - using chalk of particle size below a half milli-meter - Google Patents

Neutralising acid contg. liquors esp. metal cleaning liquors - using chalk of particle size below a half milli-meter

Info

Publication number
FR2382406A1
FR2382406A1 FR7805846A FR7805846A FR2382406A1 FR 2382406 A1 FR2382406 A1 FR 2382406A1 FR 7805846 A FR7805846 A FR 7805846A FR 7805846 A FR7805846 A FR 7805846A FR 2382406 A1 FR2382406 A1 FR 2382406A1
Authority
FR
France
Prior art keywords
liquors
chalk
particle size
esp
meter
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.)
Withdrawn
Application number
FR7805846A
Other languages
French (fr)
Inventor
Walter Hans
Heinz Kohlbacher
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.)
Voestalpine AG
Vereinigte Osterreichische Eisen und Stahlwerke AG
Original Assignee
Voestalpine AG
Vereinigte Osterreichische Eisen und Stahlwerke AG
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 Voestalpine AG, Vereinigte Osterreichische Eisen und Stahlwerke AG filed Critical Voestalpine AG
Publication of FR2382406A1 publication Critical patent/FR2382406A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
    • C02F1/5245—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents using basic salts, e.g. of aluminium and iron
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/58—Treatment of water, waste water, or sewage by removing specified dissolved compounds
    • C02F1/62—Heavy metal compounds
    • C02F1/64—Heavy metal compounds of iron or manganese
    • C02F1/645—Devices for iron precipitation and treatment by air
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C02F2101/20—Heavy metals or heavy metal compounds
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C02F2101/20—Heavy metals or heavy metal compounds
    • C02F2101/203—Iron or iron compound
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/16—Nature of the water, waste water, sewage or sludge to be treated from metallurgical processes, i.e. from the production, refining or treatment of metals, e.g. galvanic wastes
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/06—Controlling or monitoring parameters in water treatment pH

Landscapes

  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Removal Of Specific Substances (AREA)
  • Detergent Compositions (AREA)

Abstract

Acid contg. liquids, partic. washing water and cleaning acid used in metal cleaning installation, are neutralised by adding CaCO3 of particle size 0.5(0.1) mm to the liq. and then if necessary, adding milk of lime to a pH of 7-9. Process may also be used in water clarification plant where iron salts such as iron sulphate are added. The residual water is then treated with chalk as above instead of calcium hydrate. The decantation time using chalk is relatively short.
FR7805846A 1977-03-02 1978-03-01 Neutralising acid contg. liquors esp. metal cleaning liquors - using chalk of particle size below a half milli-meter Withdrawn FR2382406A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT139277A AT348947B (en) 1977-03-02 1977-03-02 PROCEDURE FOR NEUTRALIZING ACID RINSING WATERS OR USED PICKLING ACIDS FROM METAL PICKLING

Publications (1)

Publication Number Publication Date
FR2382406A1 true FR2382406A1 (en) 1978-09-29

Family

ID=3512874

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7805846A Withdrawn FR2382406A1 (en) 1977-03-02 1978-03-01 Neutralising acid contg. liquors esp. metal cleaning liquors - using chalk of particle size below a half milli-meter

Country Status (10)

Country Link
AT (1) AT348947B (en)
BE (1) BE864457A (en)
CS (1) CS199718B2 (en)
DD (1) DD134077A5 (en)
DE (1) DE2808012A1 (en)
FR (1) FR2382406A1 (en)
IT (1) IT1095471B (en)
NL (1) NL7802177A (en)
PL (1) PL204997A1 (en)
SE (1) SE7801977L (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0080996A2 (en) * 1981-12-02 1983-06-08 VOEST-ALPINE Aktiengesellschaft Process for recovering metals from acid solutions of their salts
EP0101126A2 (en) * 1982-08-18 1984-02-22 Metallgesellschaft Ag Process for treating waste pickling pastes
EP2975004A1 (en) * 2014-07-17 2016-01-20 Omya International AG Acid wastewater treatment

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0072885B1 (en) * 1982-01-19 1986-04-30 industrie automation Sondertechnik GmbH & Co Process for the decontamination of natural and technical sludges
DE3314248A1 (en) * 1983-04-20 1984-10-25 Krupp-Koppers Gmbh, 4300 Essen Process for treating the waste water produced in the production of wet phosphoric acid
AT396227B (en) * 1989-08-17 1993-07-26 Perlmooser Zementwerke Ag Neutralizing agent having depot effect
DE102007057414B4 (en) * 2007-11-27 2024-02-22 Rheinkalk Gmbh Method for increasing the pH of acidic waters

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1409390A (en) * 1964-07-16 1965-08-27 Omya Sa Advanced process for treating acidic wastewater
GB1048041A (en) * 1961-10-23 1966-11-09 Unifloc Ltd Improvements in or relating to the disposal of waste pickle liquors
GB1218601A (en) * 1968-01-01 1971-01-06 Unifloc Ltd Disposal of waste liquors from pickling processes
US3617562A (en) * 1970-05-08 1971-11-02 Allen Cywin Neutralization of ferrous iron-containing acid wastes
FR2120550A5 (en) * 1971-01-08 1972-08-18 Trefilunion Neutralisn of acid waste water - using lime

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1048041A (en) * 1961-10-23 1966-11-09 Unifloc Ltd Improvements in or relating to the disposal of waste pickle liquors
FR1409390A (en) * 1964-07-16 1965-08-27 Omya Sa Advanced process for treating acidic wastewater
DE1517476A1 (en) * 1964-07-16 1969-12-11 Omya Sa Process for neutralizing acidic water
GB1218601A (en) * 1968-01-01 1971-01-06 Unifloc Ltd Disposal of waste liquors from pickling processes
US3617562A (en) * 1970-05-08 1971-11-02 Allen Cywin Neutralization of ferrous iron-containing acid wastes
FR2120550A5 (en) * 1971-01-08 1972-08-18 Trefilunion Neutralisn of acid waste water - using lime

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0080996A2 (en) * 1981-12-02 1983-06-08 VOEST-ALPINE Aktiengesellschaft Process for recovering metals from acid solutions of their salts
EP0080996A3 (en) * 1981-12-02 1985-11-21 VOEST-ALPINE Aktiengesellschaft Process for recovering metals from acid solutions of their salts
EP0101126A2 (en) * 1982-08-18 1984-02-22 Metallgesellschaft Ag Process for treating waste pickling pastes
EP0101126A3 (en) * 1982-08-18 1984-03-21 Metallgesellschaft Ag Process for treating waste pickling pastes
EP2975004A1 (en) * 2014-07-17 2016-01-20 Omya International AG Acid wastewater treatment
WO2016008717A1 (en) * 2014-07-17 2016-01-21 Omya International Ag Acid wastewater treatment

Also Published As

Publication number Publication date
AT348947B (en) 1979-03-12
PL204997A1 (en) 1978-12-18
DE2808012A1 (en) 1978-09-07
BE864457A (en) 1978-07-03
NL7802177A (en) 1978-09-05
CS199718B2 (en) 1980-07-31
DD134077A5 (en) 1979-02-07
IT1095471B (en) 1985-08-10
ATA139277A (en) 1978-07-15
IT7820798A0 (en) 1978-03-01
SE7801977L (en) 1978-09-03

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Legal Events

Date Code Title Description
ST Notification of lapse