China has developed a new type of cathode structure of aluminum electrolytic cell technology

[China Aluminum Industry Network] Northeastern University, China Aluminum Corporation, etc. have been conducting systematic research on major energy-saving technologies for aluminum electrolysis since 2007, and have successfully developed a new set of cathode electrolysis cell technology for cathode structures. This achievement establishes the basic theory of high-efficiency and energy-saving new cathode structure electrolytic cell, breaks down the technical problem that the aluminum electrolysis power consumption is difficult to reduce greatly, proposes the technical route of large-scale power saving for aluminum electrolysis production, and leads the energy saving technology of aluminum electrolysis in the contemporary world. An important change. The project team has pioneered a new type of cathode structure with wave reduction function and improved aluminum liquid level in the electrolytic cell in the world, which solves the technical problem of large fluctuations in the magnetic fluid of the large-scale electrolytic cell and the difficulty in stable operation. The aluminum electrolytic cell The aluminum surface wave amplitude in the liquid is reduced by more than 1cm, which reduces the cell voltage by more than 0.3 volts on the basis of maintaining the current efficiency, which greatly reduces the electricity consumption per ton of aluminum electrolysis by 900 to 1100 kWh; The slot lining structure design technology breaks through the traditional design concept that the large-scale aluminum electrolytic cell must forcibly dissipate heat, and solves the technical problem that the new cathode structure aluminum electrolysis cell maintains the thermoelectric balance under the condition of low slot voltage operation; it also innovates and develops new types of aluminum. The low-pollution, low-energy, early-breakage-resistant trench-insulation coke roasting start-up technology and the flame-aluminum liquid roasting start-up technology suitable for the cathode structure of the electrolytic cell solve the problem of the novel cathode structure electrolytic cell having a trench on the surface of the cathode to start the roasting The technical difficulties reduce the start-up energy consumption of roasting and increase the stability of aluminum electrolyzer operation. The new cathode structure aluminum electrolyzer technology has been applied in large-scale industrialization in more than 30 large-scale aluminum electrolysis plants at home and abroad, such as the world famous Heidelberg Aluminum Company, with a total scale of 4.16 million tons/year. Compared with the pre-promotion period of 2008, the average energy consumption per ton of aluminum in the new cathode structure aluminum reduction cell is reduced by 900 to 1,100 kWh, and the annual energy saving is about 4.1 billion kWh, and the emission reduction equivalent CO2 reaches more than 3.8 million tons. Billion yuan, economic and social benefits are very significant.