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IPC

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Application

99117666/02, 1999-08-16

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Start date

1999-08-16

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Actual filing date

1999-08-16

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Published

2000-09-27

(72)

Inventor

Drobyshev V.A.Zinov'Ev V.G.Zolotarev A.B.Zurabov V.S.Chistov Ju.I.Korablev V.I.Dubikov A.A.Shikov A.K.Pantsyrnyj V.I.Vorob'Eva A.E.

(73)

Holder

Gosudarstvennyj Nauchnyj Tsentr Rossijskoj Federatsii Vserossijskij Nauchno-Issledovatel'Skij Institut Neorganicheskikh Materialov Im. Akad. A.A. Bochvara

PROCESS OF PRODUCTION OF HIGH-QUALITY COPPER BY VACUUM ARC MELTING Russian patent published in 2000 - IPC

Abstract RU 2156822 C1

FIELD: non-ferrous metallurgy. SUBSTANCE: invention specifically refers to production of high-quality copper with relation of specific resistance ρ at temperatures 293 K and 4.2 K/ρ 293 K/ρ 4.2 K>200 by process of vacuum arc melting. Proposed process includes melting of copper cathodes in graphite melting pot by non-consumable electrode under specific power of electric arc chosen within limits from 4.10⁶ to 6.10⁶ W/sq m of internal cross-section of melting pot in the course of time which duration is found by expression: 8.1 cth/10^-9 q/≤τ≤ 8.9 cth/10^-9 q, where cth is function of hyperbolic cotangent; τ is duration of melting, s; q is specific power of electric arc, W/sq m. Process provides for production of high-quality copper intended for manufacture of rolled products and tubes for electrical engineering, manufacture of superconductors included. EFFECT: improved efficiency of production of high-quality copper. 3 tbl

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RU 2 156 822 C1

Authors

Drobyshev V.A.

Zinov'Ev V.G.

Zolotarev A.B.

Zurabov V.S.

Chistov Ju.I.

Korablev V.I.

Dubikov A.A.

Shikov A.K.

Pantsyrnyj V.I.

Vorob'Eva A.E.

Dates

2000-09-27—Published

1999-08-16—Filed