Titanium Anodes For Hydrometallurgy

Titanium anodes for hydrometallurgy, commonly referred to as titanium-based mixed metal oxide anodes (MMO anodes), play an important role in the hydrometallurgical process. Here are some details about titanium anodes for hydrometallurgy

1. Application: electrodeposition copper, nickel, cobalt, zinc and other non-ferrous metals

2. Product specifications: processing according to drawings

3. Anode lifespan: more than 2 years

4. Coating category: Titanium substrate Lead dioxide anode

5. Electrochemical performance and life test (reference HG/T2471-2007 Q/CLTN-2012)

Name	Coating mm	Oxygen evolution potential V	Test condition	CL- content	Lifespan h
Titanium substrate Lead dioxide Anode	3	< 1.73	15% H2S04	<2g/L	> 500

6. Titanium-based lead dioxide technical indicators

A. Insoluble anode plate technical performance

    (1) Anode plate using titanium base coated with precious metal intermediate layer, α-pbO2 and β-PbO2, conductive rod using titanium copper composite rod: anode plate and conductive rod welded connection.

    (2) The thickness of the matrix titanium mesh is 2mm, the thickness of the coating on one side is not less than 0.6mm, and the thickness of the finished product is not less than 3.5mm; The surface of the plate should be flat, and the surface of the finished product should not be stratified, cracks and other inclusions.

    (3) Verticality of the plate surface: the maximum error of the upper and lower part of the plate surface is less than ±6mm

    (4) Lifespan: corrosion resistance, bending resistance, life of more than 2 years

    (5) After processing, the plane tolerance and surface tolerance are required to be less than ±5mm, and the diagonal tolerance is less than 3mm

    (6) processing in strict accordance with drawings

B. Electrochemical properties of insoluble anode plates

Conductivity of finished anode plate: 4-5*10-5Ω;

Surface hardness: HRC=11

Oxygen evolution overpotential: 1.73-1.9v (Vs.SCE,150g/L sulfuric acid, 1000A/m2)

7. Actual use data

A. Annual output of 10,000 tons of electrodeposited nickel actual use data

Project name: Lead dioxide anode for electric nickel production system

Purpose of use:

1.Lead dioxide anode in electric nickel system and Iridium Tantalum anode cost performance

2.Influence of corrugated plate lead dioxide anode on the cathode deposition of nickel

Working conditions:

PH=1.5

Sulfuric acid: 40g/L

Nickel sulfate: 40-55g/L

Boric acid: 5-7g/L

Temperature: 70°

Pole spacing: 60-70mm (with diaphragm bag)

Chloride ion: < 1g/L

Anode size: 4*820*1260 (Lead dioxide) 4*760*820 (Iridium Tantalum) 8*760*820 (Lead plate)

Anode type	Current density A/m2	Tank voltage V	Current efficiency	Life span
Lead anode	180-230	3.9-4.6	89%-91%	12-18 months
Iridium-tantalum anode	180-230	3.4-4.0	93%-95%	More than 24 months
Lead dioxide	180-230	3.8-4.5	92%-94%	More than 24 months

B. Annual output of 2000 tons of secondary copper removal actual use data

Project Name: Lead dioxide anode for secondary copper removal production system

Purpose of use: Lead dioxide anode in the secondary copper removal system and lead anode cost performance

Working condition:

PH=1.5

Sulfuric acid: 170g/L

Copper ion: 50-55g/L

bone glue: 5-7g/L

Temperature: 60°

Pole spacing: 55mm

Chloride ion: < 50ppm

Anode type	Current density A/m2	Tank voltage V	Current efficiency	Life span
Lead anode	180-210	2.0-2. 1	89% - 91%	12 months
Titanium base lead dioxide	180-210	1.9-2.1	92% - 94%	More than 24 months

8. Comparison between titanium lead dioxide anode and traditional lead anode:

The whole tank test of the production system shows the following advantages:

A, No pollution to the electrolyte, no complex lead removal system costs.

B, The shape size is fixed, and the anode deformation will not be caused by its own dissolution, affecting the cathode product phase.

C, Since the titanium matrix is not consumed during the electrolysis process, the titanium matrix can be recoated repeatedly

D, High current efficiency. At present, the current efficiency of titanium anode produced by our company can reach 93-95%, while the traditional lead anode current efficiency is only 89-91%.

E. The slot voltage is low. The titanium lead dioxide anode tank voltage produced by our company is 2%-3% lower than that of the lead anode tank, and the power saving effect is very obvious.

F, Cathode products are of high quality. Since the solution does not contain lead, lead contamination is eliminated.

G, Can work with large current, lead anode will quickly dissolve in large current, titanium lead dioxide anode can withstand more than 500A/m2 current, suitable for short and medium term production of large output requirements.

H, Reduce labor intensity and improve working environment. Lead anode has the disadvantages of large weight, soft material, thinning in production, and easy deformation, resulting in the cathode nickel plate is also easy to deformation, and workers need to often plate in production, and labor intensity is large. At the same time, because lead is a heavy metal, it is highly toxic, affects people's nervous system, and seriously pollutes the environment. Barium carbonate, used to remove lead, is also a potent drug.

The energy consumption of titanium-based lead dioxide anode is 8% higher than that of lead anode electrodeposition. Higher prices for high quality cathode products. The combined benefits of these advantages can be considerable.

Our company was founded in 2010 and over the years has accumulated a registered capital of over 14 million USD. The company grounds cover independent land of 17000 square meters and a facility area of 13000 square meters. Main products are Ruthenium titanium anode,Iridium series titanium anode,Platinum titanium anode,Lead titanium dioxide anode.
Annual output of 8,000 tons of large-sized titanium ingots, 3,000 tons of new energy titanium products, and titanium 3,000 tons of alloy ring forgings.
The company has 456 employees, 65 technicians and 8 professors.

The company has more than 100 sets of advanced equipment.

Titanium anodes for hydrometallurgy are widely used in the following fields:

• Electrolytic extraction of non-ferrous metals such as copper, zinc and nickel: In these electrolytic processes, titanium anodes can significantly improve electrolytic efficiency and reduce energy consumption.
• Electrolytic production of chlor-alkali: In the chlor-alkali industry, titanium anodes are used for the electrolytic production of chlorine gas and sodium hydroxide.
• Wastewater treatment: Titanium anode is used for electrolytic oxidation to degrade organic pollutants in wastewater to meet environmental discharge standards.

The application of titanium anode in hydrometallurgy not only improves the efficiency and stability of the electrolytic process, but also extends the service life of the equipment and reduces the production cost and environmental impact. Therefore, it has important application value in modern metallurgical industry.

 

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