Muffle furnace has two-way gas control system, which can realize automatic unattended work. Muffle furnace integrates control system and heating furnace. The lining of the furnace is made of vacuum formed high purity alumina.
Pay attention to the cleaning process of muffle furnace
Clean the burner with kerosene before carburizing. Before continuous production, the whole furnace should be cleaned once a week and the furnace interior should be intermittent. Wash and remove residues immediately after the entire atmosphere has stopped. The additional cleaning temperature is usually maintained between 850 ° C and 870 ° C. Clean completely with compressed air nozzle, the valve should not be opened too much and move back and forth to avoid local overheating.
During the cleaning process of muffle furnace, attention should be paid to the combustion conditions of each place, including the internal pressure. When the oven door is open, it cannot stand in the middle. Moreover, it can effectively prevent the whole flame from blowing out. When burning, pay attention to the existence of fuel and leakage of the whole burner. When the flame of burner goes out during operation, please close the gas valve immediately, and then close the air valve. Location. If the part falls and the switch does not work, stop feeding.
Types of common heating elements in muffle furnace
Muffle furnace has higher requirements for heating elements because of its high temperature. There are three common heating elements: resistance wire, silicon carbon rod, silicon molybdenum rod, etc.
What is the difference of heating elements in muffle furnace according to different temperature?
Different muffle furnace heating elements adapt to different heating temperatures. Generally speaking, muffle furnace with temperature below 1100 ℃ is heated by resistance wire, muffle furnace with temperature below 1300 ℃ is heated with silicon carbide rod, and muffle furnace with temperature above 1300 ℃ is heated with silicon molybdenum rod.
The long-term operating temperature below 900 ℃ muffle furnace can not use silicon molybdenum rod, which will cause low-temperature oxidation of silicon molybdenum rod.