Manufacturing method of cathode plate for electrolyzing zinc

Abstract

The invention discloses a method for making a negative plate used for electrolyte zinc. The method comprises the following steps that: an aluminum plate has both sides pre-drilled and hot-pressed with utilizing materials for making insulated bars; in the hot-pressing process, the materials pass through holes and naturally form rivets which firmly fix the insulated bars on the aluminum plate; holes are drilled in advance at the position where the aluminum plate and an electrically conductive beam are cast together, and in the process of casting, aluminum liquid in the aluminum beam pass through the holes and naturally forms aluminum rivets; the joint between the aluminum plate and the beam adopts the intermittent welding; and an electrically conductive clip and the electrically conductive beam are drilled and are tightly connected by bolts, and the joint between the aluminum beam and the electrically conductive clip adopts the flash welding or the explosion welding.The negative plate made by the method has the advantages of lowering labor intensity of workers, reducing use costs, improving production efficiency and prolonging service life.

Description

technical field [0001] The invention relates to the field of manufacturing technology, in particular to a method for manufacturing a cathode plate for electrolytic zinc. Background technique [0002] The cathode plate for electrolytic zinc is made of aluminum, and is immersed in the zinc sulfate solution in the electrolytic cell to extract zinc. The traditional manufacturing method of the cathode plate mainly has the following three problems: 1. The insulating strip is not hot-pressed, and is fixed on both sides of the aluminum plate by the operator during use, or directly fixed on both sides of the aluminum plate by hot pressing. These two methods The insulating strips are easy to fall off during use, and the operators will reinstall them every 24-36 hours, which increases the labor intensity of the workers. 2. The conductive beam of the cathode plate is cast separately, and connected with the aluminum plate by welding or direct casting after it is made. It is very common ...

AI Technical Summary

Problems solved by technology

The traditional manufacturing method of the cathode plate mainly has the following three problems: 1. The insulating strip is not hot-pressed, and is fixed on both sides of the aluminum plate by the operator during use, or directly fixed on both sides of the aluminum plate by hot pressing. These two methods The insulating strip is easy to fall off during use, and the operator has to reinstall it every 24-36 hours, which increases the labor intensity of the workers

At the same time, in order to ensure reliability during welding, full welding is usually used (that is, double-sided welding is used on the entire connection length of the beam and the aluminum plate). This method consumes a lot of materials and energy, so the production efficiency is low.

3. The connection between the copper conductive clip and the aluminum conductive beam adopts a cladding type, which is easy to be infiltrated into the gap between copper and aluminum by acid mist in the working environment. Sulfuric acid and copper react to form copper sulfate, which increases the gap between copper and aluminum. Cause the copper-aluminum contact surface to heat up due to the increase in resistance, so that the conductivity is reduced, and a large amount of electric energy is lost for no reason