(1) The electricity consumption for aluminum electrolysis production is very large. In the domestic aluminum enterprises, the electricity expenditure accounts for about 40% of the production cost; more importantly, the aluminum electrolysis production requires highly stable and efficient power supply, and it is estimated that only electrolysis is required. For each percentage point reduction in current efficiency, the electricity consumption per ton of aluminum increases by 150 kWh. A company with a capacity of 300,000 tons of aluminum, such as Baotou, is conservatively estimating that it will spend more than 14 million yuan each year on electricity costs. This means that the waste of social energy will be wasted. With the trend of large-scale production of aluminum electrolytics, The situation is more prominent. To this end, Baotou Aluminum attaches great importance to the creation of conservation-oriented enterprises. On the one hand, it regards building a larger aluminum alloy production base in China as a strategic goal of the company, increasing the technological content and added value of the products, and thus improving energy efficiency; another important aspect is that It is to actively research, develop, and apply green advanced energy-saving power supply rectification technologies to achieve the goal of economic operation, energy conservation and environmental protection. As early as the 1990s, it took the lead in the development of digital aluminum electrolysis rectifier technology, which effectively solved the original aluminum electrolysis production process, due to the current efficiency caused by the use of analog steady current technology is difficult to improve, the current up and down fluctuations The outstanding problems, combined with the self-developed integrated automation system, have significantly improved the current efficiency. Through the application of pre-baking electrolysis series of 135 kilos of aluminum, the current efficiency has been significantly improved, from the previous 89.2% to 93.5%, effectively ensuring the smooth and efficient operation of electrolytic production, the energy-saving effect is very prominent, and has achieved good results. At present, the aluminum power supply digital rectifier technology has been widely used in the company's three electrolytic series, making the aluminum supply in the electrolytic production of the power supply control accuracy, speed of response, smooth operation, all set a better level in the same industry. (II) Over the past few years, Alcoa's engineers and technicians have always been independent innovation, self-motivation, and updating and upgrading. Now this technology has "evolved" to the fourth generation. The three-phase aluminum rectifier system is the embodiment of this green advanced energy-saving technology and the iconic model project. The aluminum-clad three-phase power supply rectification system is a large-scale all-digital power supply rectification indoor substation in the former Inner Mongolia Autonomous Region, and is responsible for the smooth power supply of the electrolytic production company with a large aluminum production capacity of 140,000 tons of electrolytic aluminum. Heavy responsibility. The system is the first in China to use all-digital flow control technology and integrates all-digital flow stabilization systems, integrated automation systems, and GIS integrated appliances. The entire process of R&D, design, installation, and commissioning has been independently researched and developed by aluminum-clad engineering technicians. Completed on their own, they took only 10 months to officially put into use in August 2004. This system has been further improved on the basis of advanced energy-saving power supply technology for aluminum cladding. It adopts a totally enclosed maintenance-free design and optical cable transmission, and the operation is more accurate and reliable. In China, the first large-screen technology was adopted, and all real-time data was monitored online. The operation was more intuitive. At the same time, maintenance costs have been greatly reduced, and the daily maintenance cycle has been reduced from once a year to once every two years. Overhaul time has been reduced from one to four months in the past to one month at a time, while overhaul maintenance is not required to move for 10 years, greatly reducing The labor intensity of employees, while also reducing the project area, is conducive to more fully use good social land resources. The aluminum-clad three-phase power supply rectifier system is an excellent sample and reference sample for the domestic aluminum electrolysis industry in terms of technology, efficiency, and production operation environment, etc., and it has created a domestic superior steady flow control technology index with series of hour current deviations. It is 0.2%. At present, aluminum cladding around this advanced energy-saving power supply rectifier technology system, has applied for more than 10 patents, forming a complete organic technology cluster. (III) When Al-Aluminum continues to independently innovate aluminum electrolysis power supply rectification technology, accelerate energy-saving work, and create good benefits, it does not rest on its laurels. It always insists on only flowing technologies, and it will have double benefits, while companies are selling products. It is necessary to seize the commanding heights of technology and carry out technical output. As early as 1998, just relying on its predecessor technology, aluminum-clad engineering and technical personnel stepped out of aluminum cladding, conducted extensive technical output and services, and developed and cultivated technology markets. In 2005, Baotou Power Supply Co., Ltd., through bidding, undertook one of the key national technology equipment development and key industrial technology development projects approved and approved by the National Development and Reform Commission, and implemented the aluminum electrolysis in the 300 kA electrolytic series of Henan Zhongfu Aluminum. The research and development task of the integrated optimization technology of DC power supply quality, its research and development achievements, digital intelligent steady flow system passed the review and acceptance of the experts organized by the National Development and Reform Commission at one time, indicating that the aluminum cladding is particularly large cell type and constant current in the power supply rectification technology. There has been an important breakthrough in control. After several years of development, the current aluminum power supply digital rectifier technology has occupied half of the industry, leading the leading position, Lanzhou Aluminum, Qinghai Aluminum, Qingtongxia Aluminum, Guizhou Aluminum, Yunnan Aluminum, Shanxi Huaze Aluminum, Shandong Nanshan Aluminum, Henan Linzhou Aluminum and other domestic more than 30 large aluminum companies have adopted aluminum power supply rectifier technology. Among aluminum enterprises in the Inner Mongolia Autonomous Region, such technologies as Baotou Hope Aluminum, Huohong Hongjun Aluminum and even cross-industry Lantai Industrial Co., Ltd. have also applied this technology. At present, this technology has already gone out of the country and is applied to the famous aluminum company in Dubai, Dubai, United Arab Emirates.