A kind of repairing agent for electric shock pit of aluminum suction pipe and repairing method thereof

Abstract

The invention belongs to the field of electrolytic aluminum industry, and particularly relates to a healant for repairing electric shock pits in an aluminum absorbing pipe and a repairing method thereof. The healant comprises, by mass, 40% to 60% of ferric oxide, 10% to 15% of chromic oxide, 1% to 5% of calcium sulfate, 2% to 3% of calcium fluoride, 8% to 12% of iron, 1.0% to 2% silicon, 0.25% to 1% manganese, 0.25% to 0.5% molybdenum, 0.05% to 0.1% scandium, and 20% to 25% aluminum powder. The components of alloy matrix formed through repairing corrosion pits are similar to that of the aluminum absorbing pipe, so the alloy matrix can be firmly bonded to the aluminum absorbing pipe through metallurgical bonding.

Description

Technical field [0001] The invention belongs to the electrolytic aluminum industry, and specifically relates to a repair agent for an aluminum suction tube electric shock pit and a repair method thereof. Background technique [0002] The aluminum suction pipe is a necessary equipment in the electrolytic aluminum plant and is connected to the vacuum ladle, see figure 1 . It is generally composed of an elbow pipe (A pipe) connected to the package body at the top, a horseshoe-shaped straight pipe (C pipe) inserted into the aluminum liquid when the aluminum is sucked, and a straight pipe with flanges at both ends (B pipe) ) Three-stage composition. When working, the A tube of the aluminum suction tube is inserted into the aluminum liquid in the electrolytic aluminum tank. Using the siphon principle, the aluminum water is sucked into the ladle along the B and C tubes. The use of aluminum suction tube in the process of sucking aluminum water directly restricts the cost and efficiency...

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Problems solved by technology

In addition, the patent "Electrolytic Aluminum Vacuum Packaged Aluminum Suction Tube" (200720089695.0) improved the flange and shape of the aluminum suction tube for the deformation and damage of the aluminum suction tube due to negative pressure and the leakage of aluminum water due to poor sealing

However, through the investigation of relevant enterprises, a large number of statistical data show that the largest consumption of aluminum suction tubes is C tubes, accounting for 59.8% of the total consumption, and the main reason for the scrapping of C tubes is that the tube wall encounters anode short circuit strikes during the aluminum tapping process. wear, causing the pipe wall to rupture and form corrosion pits about 400mm from the end of the straight pipe

However, none of the above patents involves the most important cause of damage affecting the life of the aluminum suction tube, and the process operation is relatively difficult, the production cost is high, and it is extremely difficult to popularize in actual production.

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