GB623577A - Process of recovery of hard metal carbides from sintered hard metal scrap - Google Patents

Process of recovery of hard metal carbides from sintered hard metal scrap

Info

Publication number
GB623577A
GB623577A GB3153946A GB3153946A GB623577A GB 623577 A GB623577 A GB 623577A GB 3153946 A GB3153946 A GB 3153946A GB 3153946 A GB3153946 A GB 3153946A GB 623577 A GB623577 A GB 623577A
Authority
GB
United Kingdom
Prior art keywords
hard metal
scrap
recovery
heating
sintered
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.)
Expired
Application number
GB3153946A
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.)
ERNST ADALBERT POKORNY
HANS WALTER POKORNY
Original Assignee
ERNST ADALBERT POKORNY
HANS WALTER POKORNY
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 ERNST ADALBERT POKORNY, HANS WALTER POKORNY filed Critical ERNST ADALBERT POKORNY
Priority to GB3153946A priority Critical patent/GB623577A/en
Publication of GB623577A publication Critical patent/GB623577A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C3/00—Removing material from alloys to produce alloys of different constitution separation of the constituents of alloys

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Abstract

Tungsten and/or other hard metal carbides are recovered from sintered hard metal scrap by heating the scrap to between 1500 DEG and 1650 DEG C., cooling and dissolving out the binding metal with hydrochloric, sulphuric or oxalic acid. In a modification, lower temperatures (1400-1500 DEG C.) may be employed by heating the scrap metal in the presence of one or more of the elements, sulphur, phosphorus, arsenic, selenium, nitrogen and hydrogen. Specification 606,117 is referred to. The Provisional Specification describes also heating the hard metal scrap to between 1500 DEG and 2200 DEG C.
GB3153946A 1946-10-24 1946-10-24 Process of recovery of hard metal carbides from sintered hard metal scrap Expired GB623577A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3153946A GB623577A (en) 1946-10-24 1946-10-24 Process of recovery of hard metal carbides from sintered hard metal scrap

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3153946A GB623577A (en) 1946-10-24 1946-10-24 Process of recovery of hard metal carbides from sintered hard metal scrap

Publications (1)

Publication Number Publication Date
GB623577A true GB623577A (en) 1949-05-19

Family

ID=10324615

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3153946A Expired GB623577A (en) 1946-10-24 1946-10-24 Process of recovery of hard metal carbides from sintered hard metal scrap

Country Status (1)

Country Link
GB (1) GB623577A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2735748A (en) * 1956-02-21 Process for recovery of tungsten values
US4256708A (en) * 1979-12-26 1981-03-17 Gte Products Corporation Process for recovering tungsten from cemented tungsten carbide
US4406866A (en) * 1982-09-20 1983-09-27 Gte Products Corporation Recovery of refractory metal values from scrap cemented carbide
EP0233162A2 (en) * 1986-02-05 1987-08-19 Santrade Ltd. Method of treating cemented carbide bodies regarding their compositions and structures

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2735748A (en) * 1956-02-21 Process for recovery of tungsten values
US4256708A (en) * 1979-12-26 1981-03-17 Gte Products Corporation Process for recovering tungsten from cemented tungsten carbide
US4406866A (en) * 1982-09-20 1983-09-27 Gte Products Corporation Recovery of refractory metal values from scrap cemented carbide
EP0233162A2 (en) * 1986-02-05 1987-08-19 Santrade Ltd. Method of treating cemented carbide bodies regarding their compositions and structures
EP0233162A3 (en) * 1986-02-05 1989-07-19 Santrade Ltd. Method of treating cemented carbide bodies regarding their compositions and structures

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