The electrodes in the annealing furnace are usually in the form of rods or plates. The plug-in salt bath furnaces are all rod-shaped (square or round), and the embedded salt bath furnaces are plate-shaped (bar, groove, angle or curved, etc.).
The circular electrode is easy to process, but the conductivity is poor, and it is usually used in low temperature furnaces. The square electrode is frequently used, easy to manufacture, and prone to intense magnetic current flow, so that the current density is dispersed evenly. The grooved and angular electrodes can be adjusted in interval and the power is large.
Some electrodes are used soon, the surface has been corroded by molten salt or the surface has pits, which can be welded. The oxide on the surface of the electrode is first removed and then welded to the original form and size with an electrode of the same composition. The annealing furnace is about to be corroded, and it is possible to cut it off, open the groove, and then weld it. When welding, it must be placed positively and welded on both sides of the groove to prevent deformation. The surfacing section must be larger than the electrode section, and the splicing section can be slightly higher than 10mm to prevent excessive power loss. However, there must be no more than two weld repairs for one electrode.
Hangshen specializes in the production of heat treatment equipment, including various types of trolley annealing furnaces, well annealing furnaces, spheroidizing annealing furnaces, etc. If you have any questions, please contact us.
