1. A live welding method for aluminum electrolytic cell overhauling under series full current, used for welding cathode soft belt, pillar buses and short-circuit buses at the bottom of the cell, the method comprising:
dividing an electrolytic cell welding area into a plurality of zones at a power output side, and a plurality of zones at a power input side, using different guiding-current methods upon welding at the power output side and the power input side, serial currents being guided through all of the pillar buses and short-circuit buses at the bottom of the cell and an inter-cell standby bus;
during the welding of a zone, cutting off currents of short-circuit buses at the bottom of the cell and pillar buses which influence a magnetic field intensity of the zone, guiding the currents of the serial currents passing through said short-circuit buses at the bottom of the cell and pillar buses to the pillar buses, short-circuit buses at the bottom of the cell and an inter-cell standby bus of other zones not to be welded, such that the magnetic field intensity at the zone to be welded is lowered to the extent that welding can be performed, and then using a welding machine to perform welding.
2. The live welding method for aluminum electrolytic cell overhauling under series full current according to claim 1, characterized in that when the electrolytic cell at the power output side are is welded, a short-circuit port corresponding to a power output side non-welding area is kept closed, the currents are still guided through the short-circuit buses at the bottom of the cell, and the inter-cell standby bus is connected; when the overhauling cell in some zone at the power output side is welded, a short-circuit port corresponding to the zone is cut off, the short-circuit buses at the bottom of the cell are disconnected such that the currents are shunted to other short-circuit buses at the bottom of the cell and inter-cell standby buses, a cell condition monitoring and alarming system is switched on to be in a working state, and then welding operation is performed.
3. The live welding method for aluminum electrolytic cell overhauling under series full current according to claim 1, characterized in that when the overhauling cell at the power input side is welded, a short-circuit port corresponding to the power output side non-welding area is kept closed, the currents are still guided through the short-circuit buses at the bottom of the cell, and the inter-cell standby bus is connected; when the overhauling cell in some zone at the power output side is welded, a short-circuit port corresponding to the zone is cut off, the short-circuit buses at the bottom of the cell are disconnected and meanwhile compression-joint points of the pillar soft belt corresponding to an A-side welding area are disconnected so as to cut off the pillar buses, such that the currents are shunted to other short-circuit buses at the bottom of the cell and the inter-cell standby buses, the cell condition monitoring and alarming system is switched on to be in a working state, and then welding operation is performed.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. An apparatus, comprising:
an anode body having at least one sidewall, wherein the sidewall is configured to perimetrically surround a hole therein, the hole having an upper opening in the top of the anode body and configured to axially extend into the anode body; and
a pin having;
a first end connected to a current supply, and
a second end opposite the first end, wherein the second end configured to extend down into the hole via the upper opening of the anode body and end at a position inside the hole that is above a bath-vapor interface of the anode body.
2. The apparatus of claim 1, further wherein the anode body comprises a ceramic material, a metal material, a cermet material, and combinations thereof.
3. The apparatus of claim 1, further wherein the anode body is oval, cylindrical, rectangular, square, plate-shaped, triangular, pentagonal, hexagonal, and combinations thereof.
4. The apparatus of claim 1, further wherein the pin is directly bonded to the anode body.
5. The apparatus of claim 1, further wherein the first end of the pin is configured to fit into and be retained within a refractory material.
6. The apparatus of claim 1, further wherein the length of the pin is sufficient to provide mechanical support to the anode body and sufficient to prevent corrosion on the pin inside the hole.
7. An apparatus, comprising:
an anode body having at least one sidewall, wherein the sidewall is configured to perimetrically surround a hole therein, the hole having an upper opening in the top of the anode body and configured to axially extend into the anode body;
a pin having a first end connected to a current supply and a second end opposite the first end, the second end configured to extend down into the hole via the upper opening of the anode body and end at a position inside the hole that is above a bath-vapor interface of the anode body; and
a filler retained in the hole between an inner surface of the anode body and the pin, wherein the filler is configured to promote electrical communication between the pin and the anode body.
8. The apparatus of claim 7, further wherein the pin is configured to provide (a) a current supply to the anode body and (b) mechanical support to the anode body.
9. The apparatus of claim 7, further comprising a member configured to extend from the second end of the pin to extend through the bath-vapor interface.
10. The apparatus of claim 9, further wherein the member is configured with the same dimensions as the pin.
11. The apparatus of claim 9, further wherein the member has different dimensions than the pin.
12. The apparatus of claim 9, further wherein the member is configured to overlap with the second end of the pin.
13. The apparatus of claim 9, further wherein the member extends up around the pin inside the hole.
14. The apparatus of claim 9 wherein the cross-section of the pin is a: circle, oval, square, rectangle, pentagon, hexagon, and combinations thereof.
15. An apparatus, comprising:
an anode body comprising at least one sidewall circumscribing a hole therein, the hole having an upper opening in the top of the anode body;
a pin configured to extend down into the upper opening of the anode body and end at a position inside the hole that is above a bath-vapor interface of the anode body,
a conductive member configured to attach to the pin and overlap with a portion of the second end of the pin, wherein the conductive member is configured to extend down into the hole to a position below the bath-vapor interface, wherein the conductive member comprises a bath-resistant material; and
a conductive particulate material retained in the hole and configured to promote electrical communication between the pin, conductive member, and the anode body.
16. The apparatus of claim 15, wherein the overlap between the pin and the conductive member is not greater than 155 mm.
17. An apparatus, comprising:
an anode body comprising at least one sidewall circumscribing a hole therein, the hole having an upper opening in the top of the anode body;
a pin configured to extend down into the upper opening of the anode body and end at a position inside the hole that is above a bath-vapor interface of the anode body,
a conductive member configured to attach to the pin and extend down into the hole to a position below the bath-vapor interface, wherein the conductive member comprises a bath-resistant material; and
a conductive particulate material retained in the hole and configured to promote electrical communication between the pin, conductive member, and the anode body.
18. An apparatus, comprising:
an anode body comprising at least one sidewall circumscribing a hole therein, the hole having an upper opening in the top of the anode body;
a pin configured to extend down into the upper opening of the anode body and end at a position inside the hole that is above a bath-vapor interface of the anode body,
a sheath, configured to surround the pin, wherein the sheath is configured to extend along the portion of the pin which resides inside the hole of the anode body; and
a conductive particulate material configured to be retained in the hole between the pin and the sheath to promote electrical communication between the pin, the sheath and the anode body.
19. An apparatus, comprising:
an anode body comprising at least one sidewall circumscribing a hole therein, the hole having an upper opening in the top of the anode body;
a pin configured to extend down into the upper opening of the anode body and end at a position inside the hole that is above a bath-vapor interface of the anode body,
a member configured to attach to the pin and extend down into the hole to a position below the bath-vapor interface;
a sheath, configured to surround the pin, wherein the sheath is configured to extend along the portion of the pin; and
a conductive particulate material configured to be retained in the hole between the pin, the sheath, and the member and promote electrical communication between the pin, the sheath, the member, and the anode body.
20. The apparatus of claim 19, wherein the sheath resides inside the hole of the anode body.
21. The apparatus of claim 19, wherein the sheath extends up above the surface of the anode body to lower surface of a refractory material.
22. The apparatus of claim 19, wherein the sheath extends up into the refractory.
23. The apparatus of claim 19, wherein the sheath is configured to overlap with at least a portion of the conductive member.