1.Drying of the furnace

The new built furnace or the furnace that haven’t been used for a long time should be dried before operation.The drying temperature generally is 100-200℃. The element that has been used for a long period under low temperature will cause low-temperature oxidation.For the small-sized furnace, as its drying time is short, several hours will affect the element little, but for the large-sized one,as its drying is long,it should be dried carefully.You’d better open the furnace gate to make it ventilated. The gate may be half-opened with the rising of temperature and fully closed when the temperature rises above 1000℃.

2. Starting of the furnace

If t he furnace has been dried or needn’t to be dried, then it may be started to raise temperature.In order to avoid that it is impacted by over current and the electric device is overloaded,the following steps should be adapted:

3. Replacing of element

If it is found that one element is damaged during operating,firstly,you should determine where it is, at the same time prepare a made up one. Then loosen the thread which links the lead wire of the damaged element and the bus, clear out the ceramic cotton and pull out the through-brick.Afterward,insert the new element from the furnace top,link the lead wire,block the gap with ceramic cotton and start raise temperature.