Titanium electrodes for electrolytic extraction of non-ferrous metals
The titanium anode for electrolytic extraction of non-ferrous metals can be carried out in chloride electrolyte, sulfate electrolyte and mixed electrolyte of recorded sulfate. Electrolytic extraction of non-ferrous metals requires a stable anode, corrosion resistance, long-term use, and good electrocatalysis during the anode process to reduce the overpotential and cell voltage of the anode reaction.
Electrolytic oxidation or electrochemistry, in the process of water treatment including domestic sewage, industrial water and factory wastewater, the electrode not only plays the role of transmitting current, but also catalyzes the oxidative degradation of organic matter. Cause pollution, known as green water treatment. With the development of industry, the discharge of organic wastewater is increasing, especially the high-concentration wastewater discharged from the chemical, food, pesticide and pharmaceutical industries. It has high chromaticity and high toxicity, and contains a large number of bio-refractory components, which seriously pollutes rivers and lakes. The new technology of water treatment by electrolysis has the advantages of no need to add chemicals, small equipment size, small footprint, and no secondary pollution. It has been used to treat wastewater containing organic pollution such as hydrocarbons, alcohols, aldehydes, ethers, and phenols. The removal of COD mainly relies on the oxidation reaction on the surface of the anode, which directly oxidizes and degrades the organic matter on the surface of the anode, so that the organic matter in the sewage is converted into CO2 and water directly or indirectly through electrochemical conversion. The anode potential is higher than the decomposition potential of organic matter, so two competing reactions of organic matter oxidation and oxygen evolution are carried out on the anode.
In electrolytic metallurgy, it can replace the conventional lead alloy anode. Under the same conditions, it can reduce the voltage and save power consumption. The electro-metallurgical titanium anode developed by the company can be applied to the electro-metallurgy of non-ferrous metals such as Zn, CD, Cu, Mn, Co, Ni, and Cr.
For example: when recording cobalt solution electrowinning, the cell voltage of the graphite anode is 4.1V, while the coating titanium anode is 3.7V, the current efficiency is increased from 91.5% to 94%, and the production of 1t cobalt saves 400kw.h, 11% energy saving. Electrolytic production of Zn has always used lead alloy anodes containing small amounts of silver, antimony or calcium.
The following problems often occur: the lead alloy electrode is unstable in size; the oxygen evolution potential is too high (about 800mV); corrosion occurs when the anode is polarized; lead ions are dissolved in the electrolyte and deposited on the cathode, contaminating metal zinc and affecting product quality . Titanium anodes for electrodeposition metals can overcome the drawbacks of lead alloy anodes, and are suitable for high current density operation and narrow electrode spacing conditions; not only for sulfate systems, but also for recording systems, sulfates, recordings mixed system.
Application:
Treatment of Printing and Dyeing Wastewater Treatment of Landfill Leachate Treatment of Fecal Wastewater Treatment of Oily Wastewater Treatment of Engineering Mine Wastewater Containing Green Metal Recovery from Wastewater by Electrolysis Treatment of Hospital Wastewater Treatment of Catering Wastewater
