Encapsulated cathode hanger bar and method of manufacturing
A cathode for use in the refining or winning of metals, typically used in the electro-refining or winning of copper, comprising a substantially flat deposition plate fixedly attached along an upper edge thereof to an elongate hanger bar thereby defining a connection. A protective cladding is attached to the deposition plate and at least partially surrounding the hanger bar such that a cavity is defined in the region of the connection. A corrosion resistant material fills the cavity. In this manner the corrosion resistant material prevents corrosive substances from penetrating the connection. The corrosion resistant material prevents corrosive electrolytic solution and other liquids from corroding the conductive connection between the deposition plate and the hanger bar which would otherwise reduce efficiency of the cathode.
1. A cathode assembly for use in the refining of metals, comprising:
a substantially flat deposition plate fixedly attached along an upper edge thereof to an elongate hanger bar thereby defining a connection;
a protective cladding abutting said deposition plate and at least partially surrounding said hanger bar such that a cavity is defined in the region of said connection; and
a curable corrosion resistant material filling said cavity.
2. The cathode assembly as recited in claim 1 , wherein said deposition plate is attached to said hanger bar by means of at least one weld.
3. The cathode assembly as recited in claim 1 , wherein said protective cladding is performed.
4. The cathode assembly as recited in claim 1 , wherein said corrosion resistant material is an epoxy resin.
5. The cathode assembly as recited in claim 1 , wherein said deposition plate and said cladding are fabricated from stainless steel.
6. The cathode assembly as recited in claim 1 , wherein said cladding is attached to said deposition plate by means of at least one welcL
7. The cathode assembly as recited in claim 1 , wherein an inverted v-profile is machined in a lower edge of said deposition plate.
8. A method for fabricating a cathode for use in the refining of metals, said cathode being of the type comprising a deposition plate for electrodepositing metals, said method comprising the steps of:
(a) providing a substantially flat deposition plate having an upper edge;
(b) fastening an elongate hanger bar on said upper edge of said deposition plate, thereby providing a deposition plate assembly;
(c) securing a protective cladding to said deposition plate assembly so as to substantially overlay the area of fastening between said hanger bar and said upper edge of said deposition plate, thereby defining a cavity between said cladding and said deposition plate assembly; and
(d) filling said cavity with a corrosion resistant material thereby providing a fabricated cathode.
9. The method for fabricating a cathode as in claim 8 , wherein said fastening step includes welding said upper edge to said hanger bar.
10. The method for fabricating a cathode as in claim 8 , wherein said filling step comprises boring at least one hole in said protective cladding and injecting a liquid phase of said corrosion resistant material into said cavity, said corrosion resistant material subsequently hardening into a solid phase.
11. The method for fabricating a cathode as in claim 10 , wherein said corrosion resistant material is an epoxy resin.
12. The method for fabricating a cathode as in claim 8 , wherein said attaching step comprises welding said cladding to said deposition plate by means of at least one weld.