(1) The new furnace and the refractory materials of the furnace should be dried after the refractory is replaced. The oven should be heated in stages. In the initial stage of drying, the heating rate is low and the time is long, because the furnace is cold when it is just heated, and the moisture in the furnace material is high. When the temperature is below 400°C, the furnace door should be opened to discharge the water vapor. When it rises to 700°C, it should be kept warm for a period of time to make the temperature of the furnace body uniform. The drying procedure for the new furnace is as follows:
20～100℃：8 h
100~2000℃：16 h
200~4000℃：8 h
400～700℃：10 h
700~1000℃：6 h
If it is a mesh belt furnace, it should be operated for a period of time when the furnace temperature rises to 400 °C to carry out pre-oxidation treatment and improve the life of the mesh belt.
(2) The low melting point impurities (sulfur, lead, zinc, etc.) in the press billet will have an erosive effect on the furnace material and heating elements, in order to improve the service life of the furnace, the furnace should be purified regularly, especially in the pre-firing area. Try to avoid adding sulfur and other elements in powder metallurgy batching, so as not to pollute the furnace and heating elements.
(3) The furnace should be cleaned regularly. When carbon monoxide or other carbonaceous gases are used, there is a risk that carbon can be decomposed from hydrocarbons, which can be deposited on furnace walls and heating elements, which can contaminate furnaces, erode refractories and damage electric heating elements.
(4) Keep the furnace clean, and regularly clean up the iron oxide scale, crushed graphite, zinc oxide and other sundries in the furnace.
(5) Check the connection between the electric heating element and the wire to prevent poor contact arcing.
(6) Because the furnace needs to be operated at a low dew point, the flange part closed with bolts should be regularly leaked.
(7) Do not send the burning boat with oil stains into the furnace. Oil contamination entering the furnace will increase the dew point sharply and affect the normal operation.
(8) It is strictly forbidden to run over temperature.