BE801136A - Recovering noble metals from scrap - in molten alkali metal salt baths which reduce atmos pollution - Google Patents

Recovering noble metals from scrap - in molten alkali metal salt baths which reduce atmos pollution

Info

Publication number
BE801136A
BE801136A BE132453A BE132453A BE801136A BE 801136 A BE801136 A BE 801136A BE 132453 A BE132453 A BE 132453A BE 132453 A BE132453 A BE 132453A BE 801136 A BE801136 A BE 801136A
Authority
BE
Belgium
Prior art keywords
alkali metal
scrap
metal
atmos
pollution
Prior art date
Application number
BE132453A
Other languages
French (fr)
Inventor
S J Yosim
L F Grantham
Original Assignee
Rockwell International Corp
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 Rockwell International Corp filed Critical Rockwell International Corp
Publication of BE801136A publication Critical patent/BE801136A/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
    • C22B11/00—Obtaining noble metals
    • C22B11/02—Obtaining noble metals by dry processes
    • C22B11/021—Recovery of noble metals from waste materials
    • C22B11/025—Recovery of noble metals from waste materials from manufactured products, e.g. from printed circuit boards, from photographic films, paper, or baths
    • 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
    • C22B7/001—Dry processes
    • 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
    • C22B7/04—Working-up slag
    • 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
    • C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
    • C22B9/10—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals with refining or fluxing agents; Use of materials therefor, e.g. slagging or scorifying agents
    • 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

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Abstract

Process for recovering a particular metal e.g. Ag. Cu or al from scrap without creating atmos. pollution comprises introducing the scrap and a source of O2 into a mass composed of a mixt. of molten metal salts which comprises a, or a mixt. of alkali metal carbonates opt. a major proportion of an alkali metal carbonates with a secondary pref. >=1 wt.% of an alkali metal sulphate, to thermally decompose the scraps and form decomposition products and the required metal. The released metal and the decomposition products are recovered separately, and the molten salt bath is kept at a temp. of 800-1800 degrees C which is > the m.pt. of the metal to be recovered.
BE132453A 1972-06-20 1973-06-19 Recovering noble metals from scrap - in molten alkali metal salt baths which reduce atmos pollution BE801136A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US26468172A 1972-06-20 1972-06-20

Publications (1)

Publication Number Publication Date
BE801136A true BE801136A (en) 1973-10-15

Family

ID=23007139

Family Applications (1)

Application Number Title Priority Date Filing Date
BE132453A BE801136A (en) 1972-06-20 1973-06-19 Recovering noble metals from scrap - in molten alkali metal salt baths which reduce atmos pollution

Country Status (1)

Country Link
BE (1) BE801136A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111041501A (en) * 2019-12-02 2020-04-21 河南航天精工制造有限公司 Mixed alkali for removing titanium alloy surface oxide and method for removing titanium alloy surface oxide

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111041501A (en) * 2019-12-02 2020-04-21 河南航天精工制造有限公司 Mixed alkali for removing titanium alloy surface oxide and method for removing titanium alloy surface oxide

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Legal Events

Date Code Title Description
RE Patent lapsed

Owner name: ROCKWELL INTERNATIONAL CORP.

Effective date: 19860630