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Titanium matrix composite electrode materials performance and production applications

Author: XuJian
Tutor: ZuoPeiXian
School: Kunming University of Science and Technology
Course: Materials Science
Keywords: Titanium anode Matrix material Layered Composite Electrochemical properties Energy saving
CLC: TF823
Type: Master's thesis
Year: 2011
Downloads: 26
Quote: 0
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Abstract


Non-ferrous hydrometallurgical industry is energy-hungry. Electrodeposition process, the anode is the central subject of the electrochemical reaction system, the electrolysis process stability is easily neglected element has become the bottleneck to reduce the energy consumption of electrowinning. In recent years, the coated titanium electrodes because dimensional stability, low overpotential gassing, good corrosion resistance, light weight and high strength, and has been a hot research field. However, there is more research on titanium anode is around expand the deployment of the titanium substrate surface coating materials and process optimization, carrier material electrode performance has generally been ignored. Authors from a base material composed of structural design start, break traditional electrode using single metal (or alloy) as the electrode base material of the structure pattern, proposed a layered composite structure of the \or copper as the inner core and the outer layer comprised of titanium coated layered composite electrode material. Different process parameters of Ti-Al, Ti-Cu layered composite interface morphology, electrical conductivity, interfacial bonding strength and electrochemical performance analysis, combined with the sample preparation process, pressing diffusion welding process parameters optimized. The optimum preparation of the Ti-A1 layered composite: a composite temperature 550 ° C, holding time 90 min, constant pressure 6MPa, purged with argon protection; Preparation of Ti-Cu layered composite process: composite temperature of 800 ° C, constant pressure 10MPa, the holding time of 60 min, leads to the protection of argon. Coated the Ti/Ru02 the chlorine evolution the coating and Ti/IrO2-Ta2O5 analysis oxygen coating on the electrode base material made of DSA anode, various coated anode, the surface morphology and electrochemical performance test, analysis and comparison of Ti -Al, Ti-Cu two different inner core of the electrochemical properties of the layered composite. LSV and CV analysis test found that there is a significant enhancement of the the electric palm anode performance of the the layered composite matrix material, using the EIS analysis methods the electrochemical catalytic characteristics of different electrode materials analysis, that the performance improvement of layered composite electrode material not directly caused by the improved catalytic activity of the active oxide coating oxygen evolution, but is reduced by the resistance of the electrode substrate portion, so that the overall resistance of the electrode decreases, showing the electrons from the electrode to the reactants complete transfer process reduce the resistance, in order to effectively improve the electrochemical properties of the anode plate. Composite anode material in the actual production of the electrolysis, the application effect, respectively, under a current density of 150 ~ 350A/m2 simulated production experiments. Electrowinning tank voltage, current efficiency, energy consumption per unit and nickel cathode quality study results showed that the Ti-Al, Ti-Cu composite electrode cell voltage lower than the conventional electrode plate approximately 70-150mv, its cell voltage is reduced by about 2.3 to 5.0%; current efficiency with conventional electrode plate than the DC power consumption of 10.1%, 9.7% and 7.3%, Ti-Cu composite electrode save energy saving effect is obvious; excellent the cathode nickel product quality of laminated composite electrode material, The ingredient qualified. Analysis of layered composite electrode material, energy saving mechanism that layered composites give full play to the special nature of the layers of metal, making the plate surface more uniform current distribution, improve the current efficiency, combined with aluminum, copper plate inner core cell voltage reduction and electrochemical performance enhancements, the combined effect of the electrolysis process, reducing the power consumption. The literature search showed that at home and abroad Seeing this has not yet been reported. The project of great significance not only to reduce the hydrometallurgical industrial energy consumption, but also to promote the technological progress of the electrochemical industry, will have far-reaching historical significance of the electrode material application industry, sustainable development for the construction of economical, low-power contribute to society.

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CLC: > Industrial Technology > Metallurgical Industry > Nonferrous metal smelting > Light metal smelting > Titanium
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