US1852162A - Refining of copper - Google Patents

Refining of copper Download PDF

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Publication number
US1852162A
US1852162A US345258A US34525829A US1852162A US 1852162 A US1852162 A US 1852162A US 345258 A US345258 A US 345258A US 34525829 A US34525829 A US 34525829A US 1852162 A US1852162 A US 1852162A
Authority
US
United States
Prior art keywords
copper
crucible
lining
refining
molten
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 - Lifetime
Application number
US345258A
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English (en)
Inventor
James E Harris
John H White
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.)
AT&T Corp
Original Assignee
Bell Telephone Laboratories Inc
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 Bell Telephone Laboratories Inc filed Critical Bell Telephone Laboratories Inc
Priority to US345258A priority Critical patent/US1852162A/en
Priority to GB29582/29A priority patent/GB340497A/en
Priority to FR690219D priority patent/FR690219A/fr
Application granted granted Critical
Publication of US1852162A publication Critical patent/US1852162A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • C22B15/00—Obtaining copper
    • C22B15/0026—Pyrometallurgy
    • C22B15/006—Pyrometallurgy working up of molten copper, e.g. refining

Definitions

  • the present invention relates to improvements in the rening of'copper; it is of particular usefulness and finds ready applicacation in the production of copper signaling conductors, particularly such conductors which are to be Continuously loaded With magnetic material.
  • An object of the invention is to produce metallic copper which may be subsequently heated in a reducing atmosphere Without becoming embrittled, and which at the same time possesses high electrical conductivity.
  • a feature of the invention relates to an improved method of producing copper and to copper with properties improved for the purpose of its utilization in manufacturing conductors loaded with magnetic material.
  • aluminumoxide is a material particularly suitable for lining the Crucible or for the construction of the Crucible in which the copper is to be melted since it can be made to readily adhere to the inside of a Crucible, and the use of such oxide or its equivalent is consequently an important feature. Adherence to the Crucible under conditions of operation is an important feature of the lining.
  • the inside of Crucible 2 is lined as shown at 3 with a layer of aluminum oxide (A1208) Cover 4 is provided with the same lining.
  • a simple procedure for applying the lining to the Crucible is by Washing the inside with a mixture of about 50% A1203 in water. The drying of the aluminum oxide may be accelerated 'by heating the Crucible to a moderate temperature. If any fissures should develop in the lining, a second coat may be a plied.
  • pieces 'of commercia ly pure electrolytic cathode copper of dimensions about ⁇ 2" x 2" x 1%, are placed into the Crucible and the Crucible and Contents inserted into the furnace.
  • the electric current is turned on, and after the copper is molten and just before pouring, the deoxidizing agent is added; preferably calcium boride is to be used in an amount of about 0.1%.
  • the calcium boride is well mixed With the copper bath by stirring and the heat is then immediately teemed into molds or ingots and after solidifi- Cation is ready for rolling or forging.
  • This procedure furnishes a Copper which may be subsequently heated in a reducin 0' atmosphere4 without becoming embrittled andjwhich at the same time possesses a conductivity of around 101% (Matthissen standard) measured after annealing in hydrogen at 850 C. for about 30 minutes.
  • Copper possessing these properties is of particular usefulness in the manufacture of continuously loaded signaling conductors which require an annealing after the loading material has been applied thereto. During the annealing there are usually present in the space .surrounding the conductor a Certain amount of reducing gases which, if the copper Contai ns oxygen, Combine with the oxygen and thereby embrittle the Copper. The attendant high conductivity of the product of this invention enhances its usefulness for this particular purpose.
  • Another method of practicing the inven-v tion is to dip or pour molten copper in a ladle lined with aluminum oxide and add calcium boride or place particles thereof in the ladle.
  • the lining functions to prevent the copper from taking up from the Crucible impurities, such, for example, as iron, which would tend to lower its conductivity.
  • What is claimed is: 1. Method of producing metallic coppei having high electrical conductivity, which method comprises adding calcium boride to the copper when molten' to deoxidize the copper and to render it immune to the action of hot reducing agents during subsequent annealing treatments, vsaid addition taking place when the molten copper is contained in a vessel which presents to the copper only surfaces of pure aluminum oxide.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Ceramic Products (AREA)
  • Secondary Cells (AREA)
US345258A 1929-03-08 1929-03-08 Refining of copper Expired - Lifetime US1852162A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US345258A US1852162A (en) 1929-03-08 1929-03-08 Refining of copper
GB29582/29A GB340497A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1929-03-08 1929-09-30
FR690219D FR690219A (fr) 1929-03-08 1930-02-19 Affinage du cuivre

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US345258A US1852162A (en) 1929-03-08 1929-03-08 Refining of copper

Publications (1)

Publication Number Publication Date
US1852162A true US1852162A (en) 1932-04-05

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Family Applications (1)

Application Number Title Priority Date Filing Date
US345258A Expired - Lifetime US1852162A (en) 1929-03-08 1929-03-08 Refining of copper

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Country Link
US (1) US1852162A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
FR (1) FR690219A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
GB (1) GB340497A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2772949A (en) * 1952-06-07 1956-12-04 Columbia Southern Chem Corp Calcination of barium carbonate
US2817509A (en) * 1954-08-19 1957-12-24 Electro Refractories & Abrasiv Lined crucibles
US2874953A (en) * 1956-08-20 1959-02-24 Dow Chemical Co Lining for titanium-contacting apparatus
US2890879A (en) * 1954-09-09 1959-06-16 Kaiser Aluminium Chem Corp Apparatus for melting and handling molten metals
US3196056A (en) * 1959-09-28 1965-07-20 Blaw Knox Co Methods for protecting furnace parts and the like
US3669435A (en) * 1970-02-26 1972-06-13 American Optical Corp All-ceramic glass making system
US4802425A (en) * 1982-12-16 1989-02-07 The Babcock & Wilcox Company High temperature fiber system with controlled shrinkage and stress resistance

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2772949A (en) * 1952-06-07 1956-12-04 Columbia Southern Chem Corp Calcination of barium carbonate
US2817509A (en) * 1954-08-19 1957-12-24 Electro Refractories & Abrasiv Lined crucibles
US2890879A (en) * 1954-09-09 1959-06-16 Kaiser Aluminium Chem Corp Apparatus for melting and handling molten metals
US2874953A (en) * 1956-08-20 1959-02-24 Dow Chemical Co Lining for titanium-contacting apparatus
US3196056A (en) * 1959-09-28 1965-07-20 Blaw Knox Co Methods for protecting furnace parts and the like
US3669435A (en) * 1970-02-26 1972-06-13 American Optical Corp All-ceramic glass making system
US4802425A (en) * 1982-12-16 1989-02-07 The Babcock & Wilcox Company High temperature fiber system with controlled shrinkage and stress resistance

Also Published As

Publication number Publication date
GB340497A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1930-12-30
FR690219A (fr) 1930-09-17

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