（1）Introduction
The furnace age is an important factor for the operation of the furnace. The higher the furnace opertaing age, the better the performance of the furnace. Through rational use of resources, not only the cost can be reduced, but also the product quality can be improved. Therefore, it is necessary to raise the furnace age reasonably. However, because of the unreasonable operation and maintenance of some operators, some key components of the furnace are seriously damaged in a short period of time, resulting in premature destruction of the furnace, resulting in a waste of resources and economic losses. Therefore, it is necessary to study how to extend the furnace age and make reasonable use of furnace resources.
（2） Pre-operation Inspection
The key factor to extend the furnace age is to make pre-operation inspection on the furnace in advance, check whether all the components of the furnace are in good condition, and set up a good record. According to the situation of the furnace, configure the corresponding sensors and instruments, and realize the monitoring of temperature, pressure and other parameters of the furnace in time. Thoroughly check the tightness of the joint surface of each part of the furnace. If there is any leakage phenomenon, it should be dealt with in time. Defects of components, such as scale, should be cleaned and repaired regularly, and such defects should be made clear.
（3）Furnace Operation
When the furnace is operating, the main objective is to reduce the number of startups, which can greatly extend the life of the furnace. In addition, it is convenient to select the temperature section in order to reduce the number of furnace starts. The furnace temperature should not be too high to avoid the local overheating of some components. whether the spare parts of the furnace are loose or not should be checked in time. If found, it should be adjusted in time.
（4）Furnace Cleaning
Cleaning furnace is also an important link to maintain the life of the furnace. Generally speaking, combustion chamber slag and soot should be cleared regularly. The surface of the heat components of the furnace should also be cleaned regularly. To clean the components, it is better to choose manual cleaning. In this way, it can detect many problems in time, thus reducing the risk of damage.
（5）Regular Maintenance
Regular maintenance of key components of the furnace is an important factor to extend the life of the furnace. In the process of maintenance, not only should the wear of components be checked and replaced in time, but also the cleaning and protection of components should be in place. The cleaning and maintenance of the connecting parts of the electric circuit should also be in place. The operation of the furnace should also be checked at regular intervals, so as to timely detect the problems existing in the furnace and solve them in time.
（6）Conclusion
To effectively extend the life of the furnace, it is necessary to make pre-operation and post-operation inspections, establish a good monitoring system, select temperature sections reasonably, clean and maintain the furnace components regularly, and check the operation of the furnace regularly. In this way, the furnace can be used for a longer period of time and the economic benefits of the enterprise can be improved.
