Do you know all nine points about the use of resistance furnaces?

Do you know all nine points about the use of resistance furnaces? Resistance furnace is an industrial furnace that uses electric current to heat the electric heating element or heating medium in the furnace, thereby heating the workpiece or material
.

It is a heating furnace that uses electric current to pass through a resistive material to generate thermal energy
.

So, what should be paid attention to when using it? Let’s find out with me below
.

1.
The refractory material of the new furnace contains moisture.
In addition, in order to make the heating element form an oxide layer, before starting to use, it should be baked at a low temperature for several hours and gradually heated to 900 ° C, and kept for more than 5 hours to prevent the furnace from getting damp.
After that, it ruptured due to the rapid change of temperature
.

2.
When the resistance furnace is heated, the furnace jacket will also become hot.
Keep the furnace away from flammable materials and keep the furnace easy to dissipate heat
.

3.
The working life of the heating element depends on the oxide layer on its surface.
Destruction of the oxide layer will shorten the life of the heating element, and each shutdown will damage the oxide layer.
Therefore, the shutdown should be avoided after starting the machine
.

 　　4.
The furnace temperature should not exceed high temperature during use, so as not to burn the electric heating element, and it is forbidden to pour various liquids and molten metals into the furnace
.

 　　5.
In the ashing test, the sample should be fully carbonized on the electric furnace before being placed in the ashing furnace to prevent the accumulation of carbon from damaging the heating element
.

 　　6.
After several cycles of heating, cracks may appear in the insulation material of the furnace.
These cracks are caused by thermal expansion and have no effect on the quality of the furnace
.

 　　7.
The resistance furnace is an experimental product and should not be used for other purposes.
The sample should be placed in a clean crucible without contaminating the furnace
.

 　　8.
When using the resistance furnace, you should take care of it frequently to prevent accidents caused by failure of automatic control.
Do not use the resistance furnace when there is no one on duty at night
.

 　　9.
After the resistance furnace is used, the power supply should be cut off to allow it to cool down naturally
.

The furnace door should not be opened immediately to prevent the furnace from being suddenly cooled and broken.
If it is urgently needed, a small slit can be opened first to speed up the cooling, and the furnace door can be opened only when the temperature drops below 200 °C
.

 　　The above is the relevant content about the main points of the use of resistance furnaces.
I believe that everyone has a corresponding understanding of this after reading, and I hope it will be helpful to everyone
.