Precautions for the construction of coil cement

1. The induction coil of the intermediate frequency furnace to be smeared with coil paste must be cleaned off the floating ash and paint slag posted on it, and cleaned with a wire brush. The top ring refractory brick must be filled with hard objects and fastened, and the fastening screws of the furnace cover plate must be fastened. The induction coil of the intermediate frequency furnace is fixed and strengthened (very important).

2. The mixing water should be of potable water quality. The ideal water temperature is between 5-25 degrees Celsius. The amount of water added should be strictly controlled within the range specified in the manual: 15-22 liters\/100kg material. It can be added with 16kg\/100kg material. Excessive addition Water will result in decreased strength, increased solidification time and shortened cracks.

3. When mixing the medium frequency furnace coil cement, make sure that all equipment and things are clean, and must not mix materials on the bare ground. Manual mixing can be used at the site without a mixer, and the mixing should be uniform. Mixed materials should be Apply within 30 minutes of mixing (at ambient 5-25°C).

4. When the intermediate frequency furnace coil coating is modified and constructed, a plumb line should be hung in the center of the intermediate frequency furnace furnace to check whether the installation position of the coil cement is concentric with the furnace.

5. When the intermediate frequency furnace coil is modified and constructed, attention should be paid to embedding the coating material between the turns of the coil cement, and the thickness of the coating is about 6mm. The surface should be lubricated and flat. When the old furnace lining is removed by the push-out mechanism, the coating should be made large. The lower small inverted cone-shaped lubricated flat inner and outer surfaces. The thickness of the lower coating can be 10-12mm.

6. Minimize the gap or protrusion size between the bottom\/top turns of the intermediate frequency furnace coil and the corresponding intermediate frequency furnace bottom\/upper support structure (such as the pouring gate). The intention is to make the coil coating layer and the furnace bottom\/upper. The supporting structure forms an overall lubricating cylindrical surface, so that the furnace lining can be freely elastic on its lubricated surface when it is heated or cooled, so as to prevent great stress between the furnace lining and the above protrusions or gaps when the furnace lining is elastic, resulting in the furnace lining the occurrence of cracks.

7. After the coating layer is finished, use a wire brush to brush the surface of the coating layer to facilitate drying.

8. The new coil coating layer or the repair layer of the larger area coil coating layer needs to be at least 24 hours of natural drying. Small-scale also needs to be at least 6 hours of natural drying period. After natural air drying, bake with external heating source. The baking temperature is between 200-250 degrees Celsius. Infrared lamps can be used to dry things, or a crucible mold can be put into the furnace as a heated body, and it is heated with low power to uniformly bake the coating of the coil.

9. Coil mud should be finished at least 2 days before the new lining is built.