A kind of steel strip continuous copper plating method

Abstract

The invention relates to steel strip continuous copper plating III. The steel strip continuous copper plating III mainly comprises waste water produced by pretreatment and waste water produced by copper electroplating. The pretreatment mainly comprises ultrasonic oil removal, electrolytic oil removal, activation, water washing, cleaning water of a conductive roller and the like; the electroplating process mainly comprises copper plating, recovery, water washing and the like. Atomization spraying waste liquid in copper electroplating in steel strip continuous copper plating is filtered in a circulating manner through three mother tanks, a mother tank and a copper plating tank; an empty tank which is about 100mm long is formed at the outlet end of a steel strip for steel strip continuous copper plating, and residual plating liquid on the steel strip is recovered by adopting an atomization spraying way. The electrodeposition speed is accelerated by circulating filtration through a filtration pump in the copper plating process. The steel strip continuous copper plating is fast and efficient, a leveled and dense plated layer can be obtained, in case of power failure and other emergency situations, the plating liquid in the copper plating tank can pass through double mother tanks and flow into the three mother tanks for storage under the action of gravity of the plating liquid, and then the waste of the plating liquid is prevented. Spray cleaning is performed on the conductive roller, and the cleaning water enters a recovery tank and is further used for cleaning the conductive roller through a filtration pump, so that the conductivity of the conductive roller is increased, the cleaning water is recycled, the liquid in the mother tank is the plated liquid in a saturated state, and if a certain type of ions are deficient, the ions can be added in a closed treatment tank, conveyed into the mother tank and further conveyed into the planting tank by the filtration pump.

Description

technical field [0001] The invention relates to the technical field of alkaline copper plating, in particular to continuous copper plating of steel strips. Background technique [0002] In production, when the steel strip is continuously copper-plated, cyanide copper plating is generally used. When the steel strip enters the next plating tank from one plating tank, the plating solution will be brought out and dripped outside the plating tank, which will cause The waste of plating solution, because plating solution is poisonous, also can cause pollution, is unfavorable for clean production. At the same time, various impurities and dirt will adhere to the surface of the steel strip. If all kinds of impurities and dirt are brought into the next process, the plating solution will be polluted and the quality of the coating will be affected, which will lead to the emergence of unqualified products. Therefore, the steel strip needs to be cleaned. The steel strip can be cleaned by...

AI Technical Summary

Problems solved by technology

When the sodium carbonate content exceeds 75g / L, the current efficiency of the plating solution decreases, the coating is loose, the bright range is small, burrs are generated, and the anode is easily passivated

Removing sodium carbonate by freezing method needs to lower the temperature to -5°C, so that sodium carbonate crystallizes out, and puts out sodium carbonate crystals. The existing continuous copper plating production line for steel strips does not have an on-line processing device for sodium carbonate, resulting in the need to process sodium carbonate. Stopping production reduces production efficiency. The liquid in the mother tank is already in a saturated state. If there is a lack of certain ions, it can be added in the closed treatment tank, transported to the mother tank, and then sent back to plating by a filter pump. groove

The original steel strip continuous electroplating process tank is a trapezoidal tank, and there is only one steel strip on the production line, the cost is high and the output is average

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