Glass furnace thermal repair engineering has been applied to operating or "hot" furnaces. Corrosion of the furnace bottom causes certain parts to become very thin. These thin parts can be detected by heat and then repaired to avoid the possibility of unwanted corrosion and leakage of the furnace bottom. Several process technology manipulation methods are used for thermal repair to restore the thickness of the furnace bottom completely or partially, thereby keeping the furnace running safely again. This method can repair the furnace bottom without cooling the furnace to room temperature. This avoids the expensive cost of closing the furnace, saves time, and eliminates the risk of damage to other refractory upper structures that are in contact with the glass.
One method is to empty the furnace glass, then drill holes in the large corrosion areas or "recesses" of the furnace bottom to discharge the glass from these smaller areas. Spray a flux onto the damaged area and then heat it locally to completely remove the remaining glass adhering to the refractory material that needs to be repaired. Spray a gunning material directly onto the damaged furnace bottom through a spray gun until the desired thickness is reached.
The second method is to empty the glass and prepare for cleaning the damaged kiln bottom area as described above. Use a spray gun to transport a predetermined amount of refractory aggregate to the damaged part of the kiln bottom with airflow. Similarly, until it is thick enough. This method can also be used for manipulation when the glass is not emptied. Here it is necessary to understand the glass convection conditions so that the repair refractory material can be sprayed to the correct position and solidified at the appropriate part of the damaged kiln bottom. It is not a good idea to repair the furnace bottom when the pool furnace is full of glass, but sometimes it is limited to do so due to environmental protection requirements.
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