EP 0255451 B1 19900912 - PROCESS FOR SHUTTING DOWN AND RESTARTING AN ELECTROLYTIC REFINING PLANT
Title (en)
PROCESS FOR SHUTTING DOWN AND RESTARTING AN ELECTROLYTIC REFINING PLANT
Publication
Application
Priority
FR 8609409 A 19860625
Abstract (en)
[origin: US4746409A] The present invention concerns a process for stopping for a prolonged period and restarting a series of tanks for the electrolytic refining of copper. The process comprises preparing for the stoppage by reducing the proportion of Cu2+ ions in the electrolyte, controlling the additive agents, regulating the level of the electrolyte, and slow crystallization of CuSO4 in the form of very fine crystals. Subsequent restarting comprises restoration of the circulation of the electrolyte with progressive heating, a progressive increase in the electrolysis current strength, and resumption of the addition of additives. Use of the invention makes it possible to obtain deposits of refined copper of commercial quality as from the first electrolysis cycle.
IPC 1-7
IPC 8 full level
CPC (source: EP US)
Designated contracting state (EPC)
AT BE DE ES GB IT SE
DOCDB simple family (publication)
FR 2600674 A1 19871231; FR 2600674 B1 19880826; AT E56487 T1 19900915; CA 1312303 C 19930105; DE 3764901 D1 19901018; EP 0255451 A1 19880203; EP 0255451 B1 19900912; ES 2017751 B3 19910301; FI 83886 B 19910531; FI 83886 C 19910910; FI 872805 A0 19870624; FI 872805 A 19871226; MX 168446 B 19930525; US 4746409 A 19880524
DOCDB simple family (application)
FR 8609409 A 19860625; AT 87420172 T 19870622; CA 540375 A 19870623; DE 3764901 T 19870622; EP 87420172 A 19870622; ES 87420172 T 19870622; FI 872805 A 19870624; MX 704287 A 19870623; US 6538887 A 19870623