How should we operate the ten types of maintenance for resistance wires correctly

How should we operate the ten types of maintenance for resistance wires correctly

Some industrial equipment such as industrial electric furnaces and household appliances require the application of resistance wires. Customers are still very cautious in the process of purchasing resistance wires to ensure that they work on the equipment for a long time. However, they operate well in the early stages and during use, but they cannot be used for long. Some of the problems arise from the maintenance of resistance wires. How should they be maintained? Let me share with you here:

1. The oxide skin inside the furnace must be regularly cleaned with a brush, broom, or compressed air to prevent short circuits from falling on alloy components. Generally, cleaning should not be less than once a month.

2. It is best to lift and strike heat-resistant steel components such as bottom plates, citrus stoves, and furnace tanks after use for a period of time to remove their oxide scales to prevent them from collapsing or burying the components. Especially for chromium manganese nitrogen steel, the peeling is more severe during later use.

3. The lower teeth of the box furnace door and the ring knife of the parallel furnace cover must be tightly inserted into the sand seal groove. The sand inside the sand seal must not be too full and must be flat. If sand falls into the furnace, it should be cleaned promptly. For low-temperature furnaces, a layer of intact asbestos rope liner can be placed.

4. The externally heated salt bath furnace should regularly lift out the orange vortex to remove molten salt. The condensation salt on the surface of the component can be cleaned with hot water; The condensation salt on the tiles can be removed by scraping.

5. The furnace cover of the brass insulation furnace must be tightly connected to prevent "copper frost" from falling into the furnace and corroding the components.

6. Avoid non ferrous metals such as copper, aluminum, zinc, tin, and lead from coming into contact with electric heating components. Whether it is fine powder, molten liquid, or steam, it is very harmful to the corrosion of components at high temperatures. This is because the eroded area forms "pits", the cross-section becomes smaller, and eventually burns off due to overheating.

7. The cover plate of the trolley used in the elevating electric annealing furnace should be tightly pressed to prevent overheating and melting due to sand falling into the component during casting annealing. Therefore, it is necessary to regularly inspect and promptly remove accumulated sand.

8. Due to the thermal expansion, contraction, and creep elongation during heating and shutdown, the bolts of the lead out rod wiring clamp are prone to oxidation and loosening, and should be inspected and tightened regularly. 8. Due to the thermal expansion, contraction, and creep elongation during heating and shutdown, the bolts of the lead out rod wiring clamp are prone to oxidation and loosening, and should be inspected and tightened regularly.

9. The hole of the lead out rod should be tightly blocked to prevent the leakage of protective gas from burning here, causing the rod body to oxidize and peel off, resulting in poor contact between the lead out rod and the clamp.

10. When using a non tank carburizing furnace or a controlled atmosphere containing CO, carbon dissociation can occur, leading to short circuits. Therefore, it is necessary to frequently open the furnace door or regularly use compressed air for blowing and cleaning to timely burn off the carbon burning materials.

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