Manufacturing method of starting sheet for nickel electrolysis

Abstract

The invention relates to a manufacturing method of a starting sheet for nickel electrolysis, in particular to a manufacturing method of a starting sheet for nickel electrolysis extraction or electrolytic refining. The method comprises the following steps of: (1) rolling: laminating at least two layers of foam nickel together and manufacturing a bright and hole-free metal nickel composite sheet by rolling; (2) cutting: cutting the composite sheet into blocks according to a designed size or shape; (3) arranging a lug: arranging the lug by welding or riveting to obtain the nickel starting sheet. By adopting the method, the technical bottleneck of the conventional nickel starting sheet machining process is broken through; the method has a short manufacturing flow and high efficiency and is suitable for continuous production; the manufactured starting sheet has uniform thickness, stable size and flat profile; and the lug is arranged by welding or riveting, so that size positioning is accurate and the operation efficiency is high.

Description

technical field [0001] The invention relates to a method for preparing a starter sheet for the electrolysis industry, in particular to a method for preparing a starter sheet for nickel electrolytic extraction or electrolytic refining. Background technique [0002] In the technical field to which the present invention belongs, the existing known technology is to use stainless steel plate or titanium plate as the seed plate (or claim mother plate) to produce the nickel initial electrode sheet, and the seed plate is electrodeposited nickel to a certain thickness ( For example, 0.5mm), then take out the seed plate, peel off the nickel coating on the surface of the seed plate, the complete stripped object is processed by leveling, trimming, embossing and tabbing, etc. Things become waste. The domestic document "Process and Application of Rolling Method to Produce Initiator Sheets" ("Mining Industry Engineering" Volume 23, No. 2) expounds the process of preparing electrode sheets...

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Problems solved by technology

The melting point of nickel is 370°C higher than that of copper, and it has high strength, poor ductility, and is easily oxidized into toxic oxides at high temperatures. The oxidation loss is serious, and it needs to be melted in a vacuum furnace. These characteristics determine that the continuous casting and rolling process is not suitable for nickel starter sheets. In addition, the output of electrolytic nickel is only a few tenths of that of electrolytic copper. Therefore, there is currently no new process for continuously preparing nickel starter sheets, and the seed plate electrolysis method is still used.

[0007] my country's Jinchuan Group Company has begun to use the nickel starting plate linkage processing unit to realize the automation and scale of nickel starting plate processing and production, but this linkage unit is limited to figure 1 The process in the process is connected in an automated form, and it does not have the effect of continuously preparing nickel starter sheets

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