MOTHER PLATE AND DEVICE FOR SEPARATING METAL DEPOSIT FROM IT

摘要

1. A mother plate used as a cathode in an electrolytic process, as metal electrorefining or metal electrowinning, comprising on the edge (25,34,44) or on the vicinity of the edge of the mother plate a growth affecting means (16,24,36) for creating an irregularity in the growth of the metal deposit (4), a groove with the walls in acute angle to each other so that the groove is the broadest at the surface of the mother plate of the cathode and the growth affecting means (16,24,36) is used as a hinged member when the metal deposit (4) is tilted to the mother plate of the cathode in order to break the metal deposit (4) in two separate pieces along the irregularity in the growth. 2. The mother plate used as a cathode in an electrolytic process, as metal electrorefining or metal electrowinning, comprising on the edge (25,34,44) or on the vicinity of the edge of the mother plate a growth affecting means (16,24,36) for creating an irregularity in the growth of the metal deposit (4) providing the density of electric current on the vicinity of the edge of the mother plate different from the current densit on the vicinity of other parts of the mother plates of electric current used in the electrolytic process on the edge (25,34,44) or the mother plate and is used as a hinged member when the metal deposit (4) is tilted to the mother plate of the cathode in order to break the metal deposit (4) in two separate pieces along the irregularity in the growth. 3. The mother plate of claim 2, characterized in that the growth affecting means (16,24,36,43,53) is based on the length difference between the cathode and the respective anode in an electrolytic process.