Hengke Instruments: Instructions for repair and maintenance of box muffle furnace
The appearance of the box-type resistance furnace is a rectangular parallelepiped. The task room is made of high-quality carbon capsules filled with machined silicon refractory materials. The furnace shell is made of high-quality cold-rolled steel plates and is welded by folding with a small particle machine. The insulation material is used as the insulation layer. The muffle furnace is generally suitable for various laboratories, industrial and mining enterprises, and scientific research units. In order to increase the heat loss at the furnace mouth and improve the average temperature in the furnace, a heat shield made of high-quality refractory materials is installed inside the furnace door.
Box type resistance furnace repair and maintenance
In the silicon carbon rod type furnace, if it is found that the silicon carbon rod is damaged, the new silicon carbon rod with the opposite specification and similar resistance value should be replaced. When changing, first remove the maintenance cover and the silicon carbide rod chuck at both ends, and then take out the damaged silicon carbon rod. Because the silicon carbon rod is easy to break, be careful when installing the device. The exposed parts of the furnace shell at both ends should be equal. The chuck must be Tighten it to make good contact with the silicon carbon rod.
If the chuck is severely oxidized, it should be replaced with a new one. Asbestos ropes are used for the gaps in the device holes at both ends of the silicon carbon rod. The furnace temperature must not exceed the maximum task temperature of 1350 ° C. The silicon-carbon V-type mixer rod is allowed to continue for 4 hours at the lowest temperature. After the electric furnace has been used for a very long time, if the heating power adjustment knob is adjusted clockwise to the maximum position, the heating current still cannot go up. The extra value of the small space labeling machine is far away, and the required heating power cannot be reached, which explains that the silicon carbon rod has aged.
When changing the connection method, the box-type resistance furnace does not need to be equipped with silicon carbon rods, but only needs to change the connection method. After changing the connection method, pay attention to the slow adjustment of the heating power adjustment button when using the muffle furnace. The heating current value must not exceed the additional value.
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