FR2457331A1 - Continuous pickling of metal in hydrochloric acid bath - esp. pickling steel prior to galvanising in molten zinc bath, where acid and ferrous chloride are reclaimed - Google Patents

Continuous pickling of metal in hydrochloric acid bath - esp. pickling steel prior to galvanising in molten zinc bath, where acid and ferrous chloride are reclaimed

Info

Publication number
FR2457331A1
FR2457331A1 FR7913068A FR7913068A FR2457331A1 FR 2457331 A1 FR2457331 A1 FR 2457331A1 FR 7913068 A FR7913068 A FR 7913068A FR 7913068 A FR7913068 A FR 7913068A FR 2457331 A1 FR2457331 A1 FR 2457331A1
Authority
FR
France
Prior art keywords
pickling
bath
soln
hcl
esp
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Withdrawn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
FR7913068A
Other languages
French (fr)
Inventor
Christian Bozec
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.)
Minemet Recherche SA
Original Assignee
Minemet Recherche SA
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 Minemet Recherche SA filed Critical Minemet Recherche SA
Priority to FR7913068A priority Critical patent/FR2457331A1/en
Publication of FR2457331A1 publication Critical patent/FR2457331A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
    • C23G1/36—Regeneration of waste pickling liquors

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)

Abstract

Part of the soln. in the HCl bath is fed to a still for recovery of HCl as a distillate which is recycled to the pickling bath; the sump in the still consists of a soln. of FeCl2near to satn., and this soln. is removed and used in other processes. Fresh HCl is also added to the pickling bath to maintain its concn. at 2-4 normal. The flow of the pickling soln. to the still is pref. adjusted so the pickling bath contains 30-70 g/l FeC12. The pickled workpieces are pref. rinsed in water which is then fed through a cationic exchange resin. Subsequent elution of the resin by a soln. which is min. 4-normal HCl is used to reclaim FeC12 returned to the pickling bath. Method provides a low cost method of recuperating chemicals and avoiding environmental pollution, esp. when pickling steel prior to hot dip coating is molten Zn.
FR7913068A 1979-05-23 1979-05-23 Continuous pickling of metal in hydrochloric acid bath - esp. pickling steel prior to galvanising in molten zinc bath, where acid and ferrous chloride are reclaimed Withdrawn FR2457331A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7913068A FR2457331A1 (en) 1979-05-23 1979-05-23 Continuous pickling of metal in hydrochloric acid bath - esp. pickling steel prior to galvanising in molten zinc bath, where acid and ferrous chloride are reclaimed

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7913068A FR2457331A1 (en) 1979-05-23 1979-05-23 Continuous pickling of metal in hydrochloric acid bath - esp. pickling steel prior to galvanising in molten zinc bath, where acid and ferrous chloride are reclaimed

Publications (1)

Publication Number Publication Date
FR2457331A1 true FR2457331A1 (en) 1980-12-19

Family

ID=9225751

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7913068A Withdrawn FR2457331A1 (en) 1979-05-23 1979-05-23 Continuous pickling of metal in hydrochloric acid bath - esp. pickling steel prior to galvanising in molten zinc bath, where acid and ferrous chloride are reclaimed

Country Status (1)

Country Link
FR (1) FR2457331A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0506000A2 (en) * 1991-03-29 1992-09-30 Scientific Impex Establishment Apparatus for chemical treatment of metal
CN115246684A (en) * 2021-12-17 2022-10-28 徐州瑞马智能技术有限公司 Hot-dip galvanizing rinsing water circulation treatment process

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB877066A (en) * 1959-04-30 1961-09-13 Kestner Evaporator And Enginee Process for the treatment of pickle bath liquor
DE1276979B (en) * 1961-07-05 1968-09-05 Budenheim Rud A Oetker Chemie Process for pickling metals
US3847757A (en) * 1973-06-04 1974-11-12 Nat Steel Corp Recovering chromium values for stabilization of tin-plate surfaces
US3975267A (en) * 1974-03-06 1976-08-17 Henry H. Wendel Liquid treating system
FR2423451A1 (en) * 1978-04-17 1979-11-16 Minemet Rech Sa Purification of metal pickling effluent - using anion and cation exchange resins and opt. with by=production of fertiliser salts

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB877066A (en) * 1959-04-30 1961-09-13 Kestner Evaporator And Enginee Process for the treatment of pickle bath liquor
DE1276979B (en) * 1961-07-05 1968-09-05 Budenheim Rud A Oetker Chemie Process for pickling metals
US3847757A (en) * 1973-06-04 1974-11-12 Nat Steel Corp Recovering chromium values for stabilization of tin-plate surfaces
US3975267A (en) * 1974-03-06 1976-08-17 Henry H. Wendel Liquid treating system
FR2423451A1 (en) * 1978-04-17 1979-11-16 Minemet Rech Sa Purification of metal pickling effluent - using anion and cation exchange resins and opt. with by=production of fertiliser salts

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0506000A2 (en) * 1991-03-29 1992-09-30 Scientific Impex Establishment Apparatus for chemical treatment of metal
EP0506000A3 (en) * 1991-03-29 1993-02-24 Scientific Impex Establishment Apparatus for chemical treatment of metal
CN115246684A (en) * 2021-12-17 2022-10-28 徐州瑞马智能技术有限公司 Hot-dip galvanizing rinsing water circulation treatment process

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