[China Aluminum Network] China's aluminum electrolysis technology Since the introduction of 160KA intermediate blanking prebaked trough technology in the late 1970s, it began with the digestion of foreign technologies and opened a prelude to the development of modern aluminum electrolysis technology in China. The research of magnetic fluid mathematical model is at the core, and extensive and in-depth research work has been carried out in terms of process, materials, process control and supporting technologies. Since the 1990s, a series of achievements have been made in the basic theory, the development of large aluminum electrolytic tanks, and engineering applications. The development of large-scale electrolytic cell technologies of 280 and 320 kA has been successful, and the technological progress of the aluminum industry has been remarkable. The development of large-capacity electrolytic cells has enabled China's aluminum electrolysis technology to reach the international advanced level as a whole, and the appearance of electrolytic aluminum industry has fundamentally changed. The actual operation index is poor. Due to the short development time, the deep development of China's large-scale aluminum electrolytic cells in the production field is obviously insufficient, resulting in a large gap between the production indicators of actual operational indicators and the international advanced level. Most of them are operated under large-load and small-grid power grids, and there are many hidden safety hazards. Aluminium electricity and joint ventures are one of the trends in the development of electrolytic aluminum companies in China, but at the same time there are also technical problems. Due to the large scale of large-capacity electrolyzers (a series of production capacities of up to 200,000 tons or more), huge electricity loads are concentrated on one production series (generally more than 400,000 KW), and any fluctuations in electrolysis series production will result. The greater impact of the power grid or captive power plant may even threaten the safety of the power supply. The lack of a "fine design" technique based on a thorough grasp of the mechanism and laws of cathode damage and a comprehensive technical measure to increase the service life of the cell makes it difficult for the electrolytic cell to reach the design life and the early breakage rate is high. Problems affecting the life of large troughs in China In addition to the quality of cathode carbon materials commonly considered in China, there are some problems in the design of electrolyzers, furnace construction materials, furnace quality, roasting start-up, normal production operations, and production management. . The underlying reason for these problems is that China still lacks an in-depth grasp of the mechanism and laws of aluminum cell damage (often referred to as cathodic failure) and the "fine design" techniques and integrated technical measures to improve the life of the cells. With the continuous expansion of the capacity of the electrolytic cell, the problem of the service life of the cell becomes even more pronounced. Lack of advanced production and operation techniques, high operating costs. China's 300KA grade super large-scale pre-baked aluminum electrolytic cell has been put into industrial application for a short time. The previous experience in large prebaked tanks cannot be fully replicated (these experiences are also very limited). The problem of unequal current distribution during the roasting start-up process is more prominent and the energy consumption during the roasting start-up process is large; the physical field (electric field, magnetic field, flow field) of the electrolysis cell after the operation is apt to fluctuate, and it is difficult to maintain the heat balance; the slot resistance electrode It is susceptible to external disturbances and fluctuates. It is difficult to extinguish after the anode effect occurs. Due to the large inertia of the electrolytic cell, it is difficult to quickly return to normal if the fluctuation of the tank condition or abnormality of the slot condition occurs. In terms of the overall production status of China's electrolytic aluminum, the comprehensive utilization efficiency of energy is about 15% lower than the international advanced level, mainly reflected in: a difference of 2-3 percentage points in current efficiency; a difference of 300-800 kWh in electricity consumption per ton of aluminum; an anode for electrolytic aluminum The energy consumption of the production process differs by about 3Gj/t; the anode consumption of the electrolytic aluminum differs by 30-60Kg (equivalent to about 75-150Kg of standard coal); the service life of the electric tank differs by about 1000 days; the anode effect coefficient is advanced internationally by 0.1 times per day. China's better level is around 0.3 times/day. Since the electrolytic aluminum industry in China began in 2002, the production of electrolytic aluminum began to be surplus. Affected by the declining demand from downstream industries, China’s electrolytic aluminum surplus in 2008 is expected to reach 500,000 tons. Demand for electrolytic aluminum slowed down. Affected by the economic crisis, demand from real estate and automotive industries fell sharply. Demand from the power equipment industry continued to grow rapidly. The demand for electrolytic aluminum in the packaging industry remained stable. 2008 The demand for electrolytic aluminum grows at around 10%. China's bauxite resources are scarce and capacity expansion is not sustainable. China's mineral resources are scarce and aluminum resources can only be maintained for 10 years. China's resources can no longer support an average annual expansion rate of around 20% in the electrolytic aluminum industry. The production cost of electrolytic aluminum is between 15,000 yuan/ton and 17,500 yuan/ton, while the price of electrolytic aluminum is only 13,400 yuan/ton, and the industry suffers serious losses. As raw materials fell further, the average production of China's electrolytic aluminum companies was also around 15,000 yuan, so the possibility of a sharp drop in aluminum prices was very small. Around June 2009, the aluminum price may reach 15,000 yuan/ton. Full Power Emergency Battery Pack The Full power emergency pack is ideal for LED tubes 3-40W Full power emergency output wattage for LED emergency lighting 60-180mins. Automatic lighting up when main power failures. Suitable for LED fitting with external led driver and internal driver. Widely using for parking lot, office, building, warehouse, school, hospital, workshop etc. Emergency Lighting Battery Pack,Emergency Battery Pack For Led Lights,Emergency Power Packs,Bodine Battery Pack,led battery backup ballast Foshan Nai An Lighting Electric Co.,ltd , https://www.naipsled.com