Precautions for construction of coil cement

1. The induction coil of the intermediate frequency furnace coated with coil glue must be cleaned of floating ash and paint slag, and cleaned with a wire brush. The annular refractory brick must be filled with hard objects and tightened, and the fastening screws of the furnace cover plate should be tightened. The induction coil of the intermediate frequency furnace Fixed reinforcement.

2. The mixed water should reach the quality of drinking water. The ideal water temperature is between 5-25 degrees Celsius. The amount of water to be added should be strictly controlled within the range specified in the instructions, 15-22 liters\/100kg of material. It can be added at 16 kg\/100 kg. Excessive addition of water will reduce strength, increase setting time and shrinkage, causing cracks.

3. When the medium frequency furnace coil mortar is stirred, all equipment and tools must be cleaned, and the mixture cannot be stirred on the bare ground. Manual stirring can be used where there is no mixer, and it should be stirred evenly. The mixed materials should be completed within 30 minutes after mixing ( Ambient temperature is 5-25 degrees Celsius).

4. During the coating construction of the intermediate frequency furnace coil, a plumb line should be hung in the center of the intermediate frequency furnace to check whether the coil installation position is concentric with the furnace.

5. During the construction of the intermediate frequency furnace coil coating, care should be taken to embed the coating material into the coil turns, and the coating thickness should be about 6mm. The surface should be smooth and flat. When removing the old furnace lining with the pushing mechanism, the coating should be made on The inner surface of the large and small inverted cones is smooth and flat. The thickness of the lower coating can be 10-12 mm.

6.Z Minimize the gap or protrusion size between the bottom\/top turns of the furnace coil and the corresponding bottom\/upper support structure (eg gate) of the furnace. The purpose is to make the coil coating and the support of the furnace bottom\/upper The structure forms a complete smooth cylindrical surface, so that the furnace lining can freely expand and contract on its smooth surface when heated or cooled, thereby preventing the furnace lining from expanding and contracting due to the large stress generated between the above-mentioned protrusions or gaps. cracked.

7. After the coating is completed, brush the surface of the coating with a wire brush to facilitate drying.

8. The repair layer of new coil coatings or larger coil coatings should be at least naturally dried. Small areas also need at least 6 hours of natural drying time. After natural air drying, bake at 200-250 degrees Celsius with an external heat source. You can use The infrared lamp is used as a drying tool, and the crucible mold can also be put into the furnace as a heating body, and the low-power heating can make the coil coating bake evenly.