Daily maintenance of large box type resistance furnace

The daily maintenance of large box type resistance furnaces is crucial for ensuring their normal operation, extending their service life, and ensuring product quality. The following is the detailed content of its daily maintenance:

External maintenance of furnace body
Clean
Regular cleaning: Use a clean soft cloth or vacuum cleaner to regularly remove dust, debris, and oil stains from the surface of the furnace. For example, conducting a comprehensive cleaning once a week can prevent dust accumulation from affecting heat dissipation and equipment appearance.
Wipe off stains: For stubborn stains on the surface of the furnace body, a mild cleaning agent (such as neutral detergent) can be used to wipe them off, then rinsed with clean water and wiped dry. Avoid using corrosive cleaning agents such as strong acids and alkalis to prevent damage to the surface coating of the furnace body.

Inspect
Appearance inspection: Check the furnace body daily for any abnormal conditions such as deformation, cracks, corrosion, etc. If slight deformation is found in the furnace body, professional personnel should be contacted in a timely manner for evaluation and treatment; If cracks or severe corrosion occur, the use should be stopped immediately to prevent safety accidents.
Fastener inspection: Regularly check whether the fasteners (such as bolts, nuts, etc.) on the furnace body are loose. For example, check once a month and tighten it promptly if there is any looseness to ensure the stability of the furnace structure

Internal maintenance of furnace
Clean
Remove residues: After each use, wait for the furnace to cool to a safe temperature (generally below 50 ℃), and use appropriate tools (such as brushes, shovels, etc.) to remove residues such as metal oxides, powders, etc. from the furnace. Prevent the accumulation of residues from affecting the next heating effect and furnace life.
Deep cleaning: Regularly clean the furnace according to the frequency of use. For example, after 10-20 uses, a specialized furnace cleaner can be used to clean and remove stubborn stains and carbon deposits inside the furnace.
inspect
Furnace material inspection: Regularly inspect furnace materials (such as fire-resistant bricks, ceramic fibers, etc.) for damage, detachment, and other conditions. If cracks are found in the refractory bricks or damage is found in the ceramic fibers, they should be replaced in a timely manner to ensure the insulation performance and safety of the furnace.
Heating element inspection: Check whether the heating element (such as resistance wire, silicon carbon rod, silicon molybdenum rod, etc.) has any fracture, deformation, oxidation, or other phenomena. For example, check once every quarter. If the heating element is damaged, it should be replaced in a timely manner to avoid affecting the heating effect and normal operation of the equipment.

Electrical system maintenance
Clean
Control cabinet cleaning: Regularly clean the interior of the control cabinet, using a vacuum cleaner or compressed air to remove dust and debris. For example, clean every two months to prevent dust accumulation from causing short circuits or poor contact of electrical components.
Cleaning of wiring terminals: Check and clean the electrical wiring terminals to ensure that the wiring is secure and free of oxidation. You can use sandpaper to gently polish the oxidized area, and then apply an appropriate amount of conductive paste to ensure good electrical connection.
inspect
Electrical component inspection: Regularly check the working status of electrical components (such as contactors, relays, circuit breakers, etc.) and observe for any abnormal heating, noise, sparks, or other phenomena. For example, check once a month, and if any electrical components are found to be damaged, they should be replaced in a timely manner.
Circuit inspection: Check whether the electrical circuit is damaged, aged, or not. If the insulation layer of the circuit is found to be damaged, insulation treatment or replacement of the circuit should be carried out in a timely manner to prevent leakage accidents.

Maintenance of temperature control system
Calibration
Regular calibration: According to usage requirements, regularly calibrate the temperature control system to ensure the accuracy of temperature measurement and control. For example, calibration can be done every six months using a standard thermometer for comparison, and any deviations should be adjusted promptly.
Sensor inspection: Check whether the installation of temperature sensors (such as thermocouples, thermal resistors, etc.) is firm and whether the measurement is accurate. If the sensor is found to be damaged or the measurement is inaccurate, it should be replaced in a timely manner.
maintenance
Control software maintenance: If the resistance furnace is equipped with an intelligent control system, the control software should be regularly maintained and updated to ensure its stability and functional integrity. At the same time, backup important control parameters and programs to prevent data loss.

Maintenance of safety devices
Inspect
Overheating protection device inspection: Regularly check the working status of the overheating protection device to ensure that it can cut off the power supply in a timely manner when the temperature exceeds the set value. For example, conducting a simulation test once a month to verify the reliability of the over temperature protection device.
Leakage protection device inspection: Check whether the leakage protection device is sensitive, which can be tested by pressing the test button. If the leakage protection device fails, it should be replaced in a timely manner to ensure the personal safety of the operator.
Maintenance
Maintenance of safety signs: Check whether the safety signs on the resistance furnace are clear and complete. If they are blurry or missing, they should be replaced in a timely manner to remind operators to pay attention to safety.