Titanium mesh anode for electrodeposited nickel and preparing method thereof

Abstract

The invention discloses a titanium mesh anode for an electrodeposited nickel, which consists of a titanium coated copper conducting bar, a titanium plate support welded below the titanium coated copper conducting bar, and two titanium meshes welded onto the two sides of the titanium plate support, wherein the surfaces of both the titanium meshes are covered with metallic oxide coatings; the metallic oxide coating consists of platinum group metallic oxide and valve metallic oxide; the molar ratio of the platinum group metal and the valve metal is 1 to 2:1 to 3; 10 to 50g platinum group metal is contained in the titanium mesh per square meter; the platinum group metallic oxide is iridium oxide and / or ruthenium dioxide; and the valve metallic oxide is or several of titanium dioxide, tantalum pentoxide and zirconium dioxide. The invention also provides a preparing method for the titanium mesh anode. Compared with the conventional lead-base alloy anode, the titanium mesh anode has light weight, low oxygen evolution potential and long service life, can prevent the titanium meshes from being dissolved, and can improve the quality of the cathode products.

Description

technical field [0001] The invention belongs to the technical field of electrochemistry, and in particular relates to a titanium mesh anode for electrodepositing nickel and a preparation method thereof. Background technique [0002] Most nickel ores in my country are sulfide ores. Nickel concentrates are produced through mining and dressing operations, and are smelted into high-grade nickel matte by fire method. High-grade nickel matte is mainly used to produce electric nickel. There are two types of high-matte nickel production processes, one is soluble anode electrolytic refining; the other is selective leaching-clean solution-insoluble anode electrodeposition nickel, the medium is mainly sulfate system, selective leaching-clean solution —The insoluble anode electrodeposition nickel process has the characteristics of simple process, high metal recovery rate, less chemical consumption, low energy consumption, and no environmental pollution. The insoluble anode currently use...

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Problems solved by technology

There are two types of high-matte nickel production processes, one is soluble anode electrolytic refining; the other is selective leaching-clean solution-insoluble anode electrodeposition nickel, the medium is mainly sulfate system, selective leaching-clean solution —The insoluble anode electrodeposition nickel process has the characteristics of simple process, high metal recovery rate, less chemical consumption, low energy consumption, and no environmental pollution. The insoluble anode currently used in this process is lead-based alloy anode, and the price of lead-based alloy anode Inexpensive, stable performance, but the lead-based alloy anode has high oxygen evolution overpotential, high energy consumption, heavy weight, inconvenient operation, and easy deformation during use. Lead is easy to precipitate in the cathode and pollute the cathode product. shortcoming

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