Online middle repairing method for electrolytic bath side part inner lining
A technology of electrolytic cell and side part, which is applied in the field of on-line intermediate repair of the side part of the electrolytic cell, which can solve the problems of waste of roasting start-up costs, waste of production time, damage to the bottom of the furnace, etc., so as to reduce the maintenance cost of the tank stop and prolong the service life , to reduce the effect of damage
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Embodiment 1
[0018] A 300KA electrolyzer had extensive damage to the side lining. When repairing, draw out the electrolyte and aluminum liquid, so that the electrolyte level is 12cm, and the aluminum level is 12cm. Between the electrolyte and the side of the furnace, the surface shell material and the electrolyte block are compacted to form a barrier layer. Keep the voltage at 3.0-3.5V and the bath temperature at 940-970°C. Use an air pick to plan the covering material on the side of the electrolytic cell, the side of the electrolyte furnace, and the remaining side lining material to a depth of 32-35cm. Lay a layer of cold pound paste at the interface with a thickness of 3-5cm. Use side charcoal blocks with a thickness of 80 mm and a height of 300 mm, and place them on the cold paste one by one, with a gap of 1-3 mm. Updated side charcoal blocks throughout the sides. After the construction is over, raise the voltage to about 5V and gradually resume production.
Embodiment 2
[0020] A 150KA electrolyzer had extensive damage to the side lining. When repairing, draw out the electrolyte and aluminum liquid, so that the electrolyte level is 20cm, and the aluminum level is 15cm. Between the electrolyte and the side of the furnace, the surface shell material and the electrolyte block are compacted to form a barrier layer. Keep the voltage at 4.2-4.7V and the bath temperature at 960-990°C. Use an air pick to plan the covering material on the side of the electrolytic cell, the side of the electrolyte furnace, and the remaining side lining material to a depth of 32-35cm. Use a steel formwork for support, pound cold paste between the formwork and the side tank shell, and the thickness of the paste layer is 80-100mm. Construct in sections and sections until the entire side is rammed. After the construction is over, raise the voltage to about 5V and gradually resume production.
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