Knowledge of silicon carbide rods
1. Before unpacking the silicon carbide rods, carefully observe the resistance value range of the entire batch of silicon carbide rods, and install the closest resistance value on the same phase as much as possible, so that the furnace temperature can be more uniform and the resistance of the silicon carbide rods The value is marked on the terminal.
2. Because the silicon carbide rod is a hard and brittle material, it cannot be hard fixed during installation. The silicon carbide rod must be as mobile as possible, which means that the silicon carbide rod must be rotated and easily removed after installation. . The silicon carbide rods can be hoisted and flat-mounted.
3. The silicon carbide rod controller adopts thyristor control and the power is adjustable. The rated power of the controller should be more than 2-3 times the rated power of the silicon carbide rod electric furnace design, which can prolong the service life of the silicon carbide rod and better The use of silicon carbide rods.
4. Choose a reasonable wiring method according to the model size and resistance value of the silicon carbide rod.
5. The power of the new silicon carbide rods should be increased slowly during the heating process to minimize the difference between the temperature of the silicon carbide rods and the furnace temperature, and prevent the silicon carbide rods from overheating, which can prolong the service life of the silicon carbide rods. The new silicon carbide rods are installed and sent according to the following power delivery method: first send the power to 30-40% of the design power to preheat for 20-40 minutes, then increase the power to 60-70% and keep it warm for 20-30 minutes After the silicon carbide rod and the furnace temperature are in equilibrium, slowly increase the power until the electric furnace temperature reaches the required temperature and then record the voltage and current. The voltage and current are the voltage and current of the silicon carbide rod during normal use, in this current range Automatic temperature control can be set inside, and the voltage can be appropriately increased when the aging resistance of the silicon carbide rod becomes larger, so that the silicon carbide rod maintains a stable power.
