Sic Heat Element

Precautions for use

1. Before opening the package of silicon carbide heat elements, carefully observe the resistance value range of the whole batch of silicon carbide heat elements, and install the closest resistance value on the same phase as possible, so that the furnace temperature can be more uniform, and the resistance of silicon carbide heat element. The value is labeled on the terminal.

2. Since the silicon carbide heat element is a hard and brittle material, it cannot be fixed hard during installation, and the silicon carbide heat element should be moved as much as possible, that is to say, after the silicon carbide heat element is installed, it should be able to rotate and be easily taken out. . Silicon carbide heat element can be hoisted and mounted.

3. The silicon carbide heat element controller adopts theorist control, and the power is adjustable. The rated power of the controller should be more than 2-3 times the design rated power of the silicon carbide heat element electric furnace, which can prolong the service life of the silicon carbide heat element and better the use of silicon carbide heat element.

4. Choose a reasonable wiring method according to the model size and resistance value of the silicon carbide heat element.

5. The power of the new silicon carbide heat element should be increased slowly during the heating process so that the difference between the temperature of the silicon carbide heat element itself and the furnace temperature is the smallest so that the silicon carbide heat element will not work overheating, which can prolong the service life of the silicon carbide heat element. After the new silicon carbide heat element is installed, the power transmission method is as follows: firstly send the power to 30-40% of the design power and preheat for 20-40 minutes, then increase the power to 60-70% and keep warm for 20-30 minutes After the silicon carbide heat element and the furnace temperature are in balance, slowly increase the power until the 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 heat element in 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 heat element becomes larger so that the silicon carbide heat element can maintain a stable power.

6. After the oven is finished, when the silicon carbide heat elements heated up again, set the table setting into sections as follows: when the power is started, the set power is 40% of the normal power and kept for 20 minutes, and then the temperature is raised to the desired value. The required temperature time is 10 minutes to 30 minutes and then set the heat preservation time.

7. The silicon carbide heat element cannot only look at the current or voltage during use because the silicon carbide heat element will gradually age during use, and the resistance value will gradually increase (the voltage will gradually increase, and the current will gradually decrease ), as long as the overall input power remains unchanged, the heating temperature is constant.

8. If the silicon carbide heat elements are damaged after several months of use, they cannot be replaced with a new silicon carbide heat element, but the old silicon carbide heat element can be installed, because the silicon carbide heat element will The resistance increase is relatively large, while the resistance of the new silicon carbide heat element is small. If a new silicon carbide heat element is installed on a single piece, the temperature of the new silicon carbide heat element will be different from that of the old silicon carbide heat element, so you can choose to use the old silicon carbide heat element to install On the surface, the resistance of silicon carbide heat element has reached a similar value. If there is no old silicon carbide heat element, all silicon carbide heat elements of each phase should be removed and replaced with new silicon carbide heat elements. The old silicon carbide heat element can be replaced by a single one in future use.

9. The resistance of silicon carbide heat element keeps increasing after long-term use. When the voltage of the controller is adjusted to the highest level but the temperature is not enough for use, the connection method of the silicon carbide heat element can is changed. If it used to be in series, it can be changed to parallel. In the past, it was a Y-type connection. The connection method can be changed to a delta connection method, and the connection method can be changed according to the controller.

10. The metal oxides, slag, and other impurities in the furnace should be cleaned up in time, and should not be accumulated in the furnace, so as to prevent them from contacting with the original parts and damaging the components.

11. The continuous use of components can prolong their service life more than intermittent use.

12. The object to be heated should not contain too much water. To prevent accelerated component aging, try to avoid direct contact with alkaline substances

13. The surface temperature of the silicon carbide heat element shall not exceed 1550°C